WO2009045036A1 - Method for manufacturing wire for correcting a set of teeth - Google Patents

Method for manufacturing wire for correcting a set of teeth Download PDF

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Publication number
WO2009045036A1
WO2009045036A1 PCT/KR2008/005752 KR2008005752W WO2009045036A1 WO 2009045036 A1 WO2009045036 A1 WO 2009045036A1 KR 2008005752 W KR2008005752 W KR 2008005752W WO 2009045036 A1 WO2009045036 A1 WO 2009045036A1
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WO
WIPO (PCT)
Prior art keywords
metal
metal wire
wire
transparent
metal material
Prior art date
Application number
PCT/KR2008/005752
Other languages
French (fr)
Inventor
In Jae Kim
Original Assignee
In Jae Kim
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020070098536A external-priority patent/KR100919900B1/en
Application filed by In Jae Kim filed Critical In Jae Kim
Publication of WO2009045036A1 publication Critical patent/WO2009045036A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/20—Arch wires

Definitions

  • the present invention relates to a method for manufacturing a wire for correcting a set of teeth, and more particularly, to a method for manufacturing a wire for a set of teeth, which is harmless to a human body and by which a color of teeth maintains.
  • alveolar pyorrhea Since periodontal tissue is broken gradually from the outer gums due to the progress of, for example, periodontitis, alveolar bone is gradually lost and thereby, tooth mobility, so-called alveolar pyorrhea, appears on the spot where periodontitis is generated.
  • the treatment for alveolar pyorrhea includes two ways including tooth extraction for a tooth with increased tooth mobility so as to be hardly preserved, and fixation of a tooth capable of being preserved with the adjacent teeth with relatively low tooth mobility.
  • a metal wire is generally used.
  • the elasticity of the metal wire is used to tie the metal wire to the teeth to be fixed, and a load generated by the metal wire being bended or tensed is imposed on the teeth be fixed, thereby fixing the teeth due to imposed load.
  • a method of fixing a set of teeth by using a shape memory alloy has been currently introduced.
  • a wire-form fixing member which is a shape memory alloying agent, is thermally treated in advance, in order for a parent phase state shape to be a desired shape, that is, an anatomically corrected set of teeth, and the fixing member is appropriately set to patients under a low temperature. Then, the fixing member is heated to be back to the original shape and thus, a set of teeth is corrected by elasticity.
  • FIGS. IA and IB are respectively a shematic view and a cross-sectional view of a conventional wire 10 for correcting a set of teeth.
  • an external shape of the wire 10 for correcting a set of teeth is similar to that of a general wire.
  • the wire 10 for correcting a set of teeth is internally different from the general wire and thus, a shape and a manufacturing process of the wire 10 for correcting a set of teeth are described with reference to FIG. IB.
  • FIG. IB is a cross-sectional view of the part "A" included in the wire 10 for correcting a set of teeth of FIG. IA.
  • the conventional wire 10 for correcting a set of teeth includes a metal wire 11 and a teflon coating film 13 formed on the surface of the metal wire 11.
  • the metal wire 11 may be a general metal wire or a metal wire formed of a shape memory alloy.
  • the teflon coating film 13 is formed on the surface of the metal wire 11 by various coating methods. The teflon coating film 13 is coated close to have a color of teeth.
  • a teflon coating film is formed on the surface of a metal wire to create a color of teeth, conventionally.
  • a wire for correcting a set of teeth which is harmless to a hunan body, is needed. Disclosure of Invention Technical Problem
  • the present invention provides a method for manufacturing a wire for correcting a set of teeth which is harmless to a human body and by which a color of teeth maintains.
  • a method for manufacturing wire for correcting a set of teeth including: manufacturing a metal wire using a metal alloy; masking a posterior teeth unit of the metal wire by a mask which can surround the posterior teeth unit of the metal wire; physically or chemically etching the surface of the metal wire and performing heat treatment; coating the surface of the metal wire with a white metal material and performing heat treatment; and forming a transparent parylene film on the white metal material and performing heat treatment.
  • a method for manufacturing wire for correcting a set of teeth including: manufacturing a metal wire using a metal alloy; masking a posterior teeth unit of the metal wire by a mask which can surround the posterior teeth unit of the metal wire; physically or chemically etching the surface of the metal wire and performing heat treatment; coating the surface of the metal wire with a white metal material and performing heat treatment; coating a transparent metal oxide film on the metal material that is coated on the surface of the metal wire; and forming a transparent parylene film on the white metal material and performing heat treatment.
  • a method for manufacturing wire for correcting a set of teeth including: method for manufacturing wire for correcting a set of teeth, the method including: manufacturing a metal wire using a metal alloy; forming a masking parylene film on the surface of the metal wire and removing the masking parylene film formed on an anterior teeth unit of the metal wire; physically or chemically etching the surface of the anterior teeth unit of the metal wire and performing heat treatment; coating only the anterior teeth unit of the metal wire, or the surfaces of the anterior teeth unit and the masking parylene film with a white metal material and performing heat treatment; forming a transparent parylene film on the white metal material and performing heat treatment; and removing the masking parylene film and the transparent parylene film, or the masking parylene film, the white metal material, and the transparent parylene film which are sequentially formed on the posterior teeth unit of the metal wire.
  • the metal wire may be formed of any one of stainless, NiTi, a nickel (Ni) base alloy, a titaniun (Ti) base alloy, a copper (Cu) base alloy, and an aluminun (Al) base alloy.
  • the method may further include wet cleaning the metal wire using alkali, an organic solvent, or ultrapure water, before physically or chemically etching of the surface of the metal wire.
  • the surface of the metal wire may be etched using an etching solution manufactured by mixing any one of or a mixture of CuCl , FeCl , HCl, H SO , HNO , H PO , HF,
  • the surface of the metal wire may be electrochemically etched or electrolessly etched in the etching solution.
  • the metal wire may have a curve having a width or a depth of 0.1-50 ⁇ m.
  • the metal wire may be wet cleaned by using any one of alkali, an organic solvent, and water [21]
  • the surface of the metal wire may be etched by using sand blasting, in which ceramics or metal fine particles are used.
  • the metal fine particles may have a sizes of 1 ran- 100 ⁇ m.
  • the heat treatment, performed after physically or chemically etching of the surface of the metal wire, may be performed at atmospheric pressure or within a vacuun chamber at 50-300 0 C for one minute to forty eight hours.
  • the metal material coated on the surface of the metal wire may be coated using a wet electro-plating method or a dry plating method.
  • the metal material coated on the surface of the metal wire may include any one of or a mixture of silver (Ag), zinc (Zn), tin (Sn), indium (In), platinum (Pt), tungsten (W), nickel (Ni), chrome (Cr), aluminum (Al), and palladium (Pd).
  • the metal material coated on the surface of the metal wire may have a thickness of
  • the metal material coated on the surface of the metal wire may be formed by using any one of sputtering using plasma, thermal vacuum evaporation, e-beam evaporation, ion plating, vacuum spraying, and wet electro-plating.
  • the method may further include ultrasonic cleaning the surface of the metal wire using alkali, an organic solvent, or ultrapure water, after coating the surface of the metal wire with the white metal material.
  • the heat treatment, performed after coating the metal material on the surface of the metal wire may be performed at atmospheric pressure or within a vacuum chamber at
  • the heat treatment may be performed to the surface of the white metal material after chemically etching the surface of the metal wire.
  • the surface of the metal material may be etched using an etching solution manufactured by mixing any one of or a mixture of HCl, H2SO4, HN03, and H2O2 with
  • the surface of the metal material may be etched at 10-100 0 C for one second to five minutes.
  • the heat treatment, performed after chemically etching the surface of the metal material may be performed at atmospheric pressure or within a vacuum chamber at
  • the transparent metal oxide film may be formed by coating a sol-phase material formed of nanoparticle sized particles using a vacuum spraying method.
  • the transparent metal oxide film may be formed by using any one of sputtering, thermal vacuum evaporation, e-beam evaporation, and ion plating.
  • the transparent metal oxide film may include any one of or a mixture of ITO, ZnO,
  • the transparent metal oxide film may have a thickness of 1 nm-1 ⁇ m.
  • the transparent metal oxide film may be coated in a vacuun chamber at 15-300 0 C.
  • the transparent parylene film may include at least one of
  • A-type, and AM-type dimers are A-type, and AM-type dimers.
  • the transparent parylene film may have a thickness of 1-50 ⁇ m.
  • the heat treatment, performed after forming the transparent parylene film, may be performed at atmospheric pressure or within a vacuun chamber at 50-250 0 C for one minute to forty eight hours.
  • the mask may be formed of a polymer or a metal material.
  • a transparent metal material is coated on the wire for correcting a set of teeth and then a transparent parylene film is coated so that a color of the transparent metal material can be prevented from being changed. Also, since a user feel comfortable while wearing the wire for correcting a set of teeth, aversion of the user can be reduced.
  • the wire for correcting a set of teeth is harmless to a human body and is soft so that a user feels more comfortable of wearing it.
  • the parylene film is not formed on a part (posterior teeth unit) of the wire for correcting a set of teeth (back teeth) and only a metal wire is formed, instead, more force can be given to the back teeth and thus sliding effect can be improved.
  • FIGS. IA and IB are respectively a shematic view and a cross-sectional view of a conventional wire for correcting a set of teeth;
  • FIGS. 2A and 2B are respectively a shematic view and a cross-sectional view of a wire for correcting a set of teeth according to an embodiment of the present invention
  • FIG. 3 illustrate a metal wire of which a posterior teeth unit is masked according to another embodiment of the present invention
  • FIG. 4 illustrates processes for manufacturing a wire for correcting a set of teeth in which a parylene film is not coated on posterior teeth unit of a metal wire according to another embodiment of the present invention
  • FIG. 5 illustrates structural formulas of dimers according to an embodiment of the present invention
  • FIGS. 6 through 9 are photomicrographs of surfaces of a metal wire, wherein the surfaces are treated according to an embodiment of the present invention.
  • FIGS. 10 and 11 are photomicrographs of a metal wire in which surface treatment is peformed by using a white metal.
  • FIGS. 2A and 2B are respectively a shematic view and a cross-sectional view of a wire 20 for correcting a set of teeth manufactured by using a method for manufacturing a wire for correcting a set of teeth according to the present invention.
  • an external shape of the wire 20 for correcting a set of teeth is similar to that of a general wire.
  • the wire 20 for correcting a set of teeth is internally different from the general wire and thus, a shape and a manufacturing process of the wire 20 for correcting a set of teeth are described with reference to FIG. 2B.
  • FIG. 2B is a cross-sectional view of the part "A" included in the wire 20 for correcting a set of teeth of FIG. 2A.
  • the wire 20 for correcting a set of teeth includes a long metal wire 21, a white metal material 23 coated on the surface of the metal wire 21, a transparent metal oxide film 24 coated on the surface of the metal material 23, and a transparent parylene film 25 formed on the transparent metal oxide film 24.
  • the transparent metal oxide film 24 may be interposed between the white metal material 23 and the transparent parylene film 25 or may not exist.
  • the metal wire 21 may be formed of a general metal material or a metal alloy including a shape memory alloy material.
  • the metal alloys for forming the metal wire 21 may include any one of stainless, NiTi, a nickel (Ni) base alloy, a titanium (Ti) base alloy, a copper (Cu) base alloy, and an aluninun (Al) base alloy.
  • the shape memory alloy may be used not only in a sensor but also in tightening maching parts. Accordingly, the metal wire formed of a shape memory alloy may be used to correct a set of teeth.
  • the metal material 23 coated on the surface of the metal wire 21 is coated by using a wet electro-plating method or a dry plating method.
  • Examples of the white metal material 23 coated on the surface of the metal wire 21 may include any one of or a mixture of at least two of silver (Ag), zinc (Zn), tin (Sn), indium (In), platinun (Pt), tungsten (W), nickel (Ni), chrome (Cr), aluninun (Al), and palladiun (Pd).
  • the transparent metal oxide film 24 may be coated on the surface of the white metal material 23.
  • the transparent metal oxide film 24 may have a thickness of lnm to l ⁇ m and may be formed by using any one of sputtering using plasma, e-beam evaporation, thermal evaporation, and ion plating. In addition, a sol-phase material formed of nanoparticle sized particles is coated using a vacuun spraying method so as to form the transparent metal oxide film 24.
  • the transparent parylene film 25 which is a polymer compound, is coated on the white metal material 23 or the transparent metal oxide film 24.
  • the transparent parylene film 25 coated on the surface of the transparent metal oxide film 24 may have a thickness of 1 ⁇ m to 50 ⁇ m.
  • Parylene is verified as a haremless material, may be uniformly coated on the surface of the transparent metal oxide film 24, has smooth surface roughness, and is soft. Thus, if the wire for correcting a set of teeth on which parylene is coated is worn, patients feel comfortable.
  • the method for manufacturing a wire for correcting a set of teeth includes: manufacturing a metal wire using a metal alloy; masking a posterior teeth unit of the metal wire by a mask, which may surround the posterior teeth unit of the metal wire; physically or chemically etching the surface of the metal wire and then, performing heat treatment; coating a white matel material on the surface of the metal wire so as for the metal wire to be white and then, performing heat treatment; and forming a transparent parylene film on the white metal material and performing heat treatment.
  • the posterior teeth unit of the metal wire is denoted as a part for correcting back teeth in the wire for correcting a set of teeth.
  • an anterior teeth unit of the metal wire is denoted as a part for correcting front teeth and canine teeth in the wire for correcting a set of teeth.
  • the posterior teeth unit of the metal wire which is the part for correcting back teeth, is masked to correct the back teeth only by using the metal wire on which the parylene film is not coated. More force is needed in correcting back teeth than in front teeth and canine teeth and sliding effect of the wire for correcting a set of teeth may be excellent during correcting.
  • a parylene film may not be formed on the part for correcting back teeth, that is, the posterior teeth unit, and the posterior teeth unit may be only formed of a metal wire. Accordingly, in manufacturing a wire for correcting a set of teeth, masking the posterior teeth unit of the metal wire by a mask is needed.
  • FIG. 3 illustrate the metal wire 21 of which the posterior teeth unit is masked by a mask.
  • a tube 27 formed of an elastic material or a box for putting the posterior teeth unit in may be attached to the posterior teeth unit of the metal wire 21.
  • the elastic tube 27 or the box used as the mask may be formed of a polymer or metal material. That is, the mask may be formed of polymer such as silicon or a rubber material such as urethane.
  • a masking jig may be used so as for the posterior teeth unit to not be exposed outside. Then, the posterior teeth unit may be prevented from being coated by parylene.
  • the masking jig is formed of a polymer, a metal, or a rubber material and masks and fixes the posterior teeth unit. Then, although parylene coating is performed, the posterior teeth unit is not coated by parylene.
  • the method for manufacturing a wire for correcting a set of teeth according to another embodiment further includes coating a transparent metal oxide film, in addition to the method for manufacturing a wire for correcting a set of teeth according to the previous embodiment.
  • the posterior teeth unit of the metal wire is not coated with the parylene film as in first two embodiments.
  • a tube or a jig is not used in masking and instead, the parylene film is used in masking.
  • FIG. 4 illustrates processes for the method for manufacturing a wire for correcting a set of teeth according to the current embodiment.
  • manufacturing a wire for correcting a set of teeth according to the current embodiment is performed as follows.
  • the metal wire 21 is manufactured using a metal alloy and a masking parylene film 27 is formed on the surface of the metal wire 21. Then, the masking parylene film 27 formed on an anterior teeth unit of the metal wire 21 is removed.
  • the surface of the anterior teeth unit of the metal wire 21 is physically or chemically etched and then, heat treatment is performed.
  • Such treatment allows the next process, that is, coating of the metal material 23, to be performed properly.
  • an etching process is performed and then, heat treatment is performed, so as for the metal material 23 to be coated properly on the metal wire 21.
  • the metal material 23 is coated only on the anterior teeth unit of the metal wire 21 or is coated for the surfaces of the anterior teeth unit and the masking parylene film 27 to be white and then, heat treatment is performed.
  • the white metal material 23 is coated only on the anterior teeth unit of the metal wire 21.
  • the white metal material 23 may be coated not only on the anterior teeth unit but also on the masking parylene film 27.
  • an electro-plating method may be used.
  • a deposition method may be used.
  • the transparent parylene film 25 is formed only on the white metal material 23 or on the white metal material 23 and the masking parylene film 27 and then, heat treatment is performed.
  • the white metal material 23 is only coated on the anterior teeth unit of the metal wire 21 so that the transparent parylene film 25 is formed on the white metal material 23 coated on the anterior teeth unit and the masking parylene film 27 coated on the posterior teeth unit.
  • the transparent parylene film 25 may be also formed only on the white metal material 23 formed on the anterior teeth unit.
  • the masking parylene film 27 and the transparent parylene film 25 sequentially formed on the posterior teeth unit of the metal wire 21, or the masking parylene film 27, the white metal material 23, and the transparent parylene film 25 which may be sequentially formed on the posterior teeth unit of the metal wire 21 are removed.
  • the masking parylene film 27 formed on the posterior teeth unit of the metal wire 21 may be removed by using various methods. For example, the masking parylene film 27 may be easily removed by being scratched with a knife and peeled off.
  • the metal wire 21 is manufactured using a metal alloy. That is, the metal wire
  • the metal wire 21 is manufactured by using any one of metal alloys including a nickel (Ni) base alloy, stainless steel (SUS), NiTi, titaniun (Ti) base alloy, a copper (Cu) base alloy, and an aluninun (Al) base alloy. Then, the metal wire 21 may have elasticity and a tensile force.
  • metal alloys including a nickel (Ni) base alloy, stainless steel (SUS), NiTi, titaniun (Ti) base alloy, a copper (Cu) base alloy, and an aluninun (Al) base alloy.
  • the posterior teeth unit of the metal wire 21 is masked by the mask, which may surround the posterior teeth unit of the metal wire 21, before performing surface treatment (physical or chemical etching) for the metal wire 21 in first two embodiments.
  • Such a masking process aims to prevent the parylene film 25 being formed on the posterior teeth unit of the metal wire 21.
  • the mask may be the elastic tube 27, a box for putting the posterior teeth unit of the metal wire 21 therein, or a masking jig for the posterior teeth unit of the metal wire 21 to not be exposed outside.
  • the mask may be formed of a polymer, a metal material, or a rubber material. That is, the mask may be formed of a polymer such as silicon, a rubber material such as as urethane, or other various metal materials.
  • the posterior teeth unit of the wire for correcting a set of teeth is formed of only a metal wire, instead of the parylene film, a large force is given to back teeth and sliding effect is improved, thereby facilitating correction of back teeth.
  • the posterior teeth unit of the metal wire 21 is masked by the mask, which may surround the posterior teeth unit of the metal wire 21, and then physical or chemical etching is performed for the metal wire 21, followed by peforming heat treatment.
  • the surface of the metal wire 21 is physically or chemically etched. Then, heat treatment is performed. Before physically or chemically etching of the surface of the metal wire 21, alkali, an organic solvent, or ultrapure water may be used for wet cleaning the surface of the metal wire 21. That is, the surface of the metal wire 21 may be cleaned before performing physical or chemical etching.
  • the surface of the metal wire 21 may be etched by using an etching solution that may form a predetermined curve.
  • the etching solution may be manufactured by mixing any one of or a mixture of CuCl 2 ,
  • the surface of the metal wire 21 has a predetermined form of a curve. That is, a curve having a depth and a width of 0.1 - 50 ⁇ m is formed on the surface of the metal wire 21.
  • the surface of the metal wire may be wet cleaned by using any one of alkali, a solvent, and water.
  • etching of the surface of the metal wire 21 may be performed by using sand blasting, in which ceramics or metal fine particles are used.
  • sand blasting in which ceramics or metal fine particles are used.
  • irregular grooves are formed on the surface of the metal wire 21.
  • a size of the fine particles used in sand blasting may be in the range of lnm - 100 ⁇ m.
  • FIGS. 6 through 9 are photomicrographs of the surfaces of the metal wire 21 that are electrochemically etched.
  • the stainless (SUS) formed metal wire 21 is etched using HCl for twenty minutes (at 45 0 C).
  • the stainless (SUS) formed metal wire 21 is etched using a mixture solution of an sulfuric acid and water mixed in the ratio of one to two for five minutes (at 70 0 C).
  • NiTi formed metal wire 21 is etched using a FeCl solution for one minute (at 40 0 C).
  • 3 wire 21 is etched using FeCl solution for one minutes (at 5O 0 C).
  • the surface of the metal wire 21 that is physically or chemically etched is heat treated under a predetermined condition. After performing chemical etching, heat treatment is performed at atmospheric pressure or within a vacuun chamber of 0.1 mTorr or below. Such heat treatment may be performed at 50 - 300 0 C for one minute to forty eight hours.
  • Surface treatment and heat treatment are performed in the same manner as in the previous embodiment.
  • the heat treated metal wire 21 is coated with the metal material 23 so as to be appeared as white.
  • the metal material 23 deposited on the surface of the metal wire 21 may be coated by a wet electro-plating method or a dry plating method.
  • the metal material 23 may be coated on the surface of the metal wire 21 by using any one of sputtering, thermal vacuun evaporation, e-beam evaporation, ion plating, vacuum spraying, and wet electro-plating.
  • the metal material 23, that is deposited on the surface of the metal wire 21 and is white, may be a mixture of any one of or at least two of silver (Ag), zinc (Zn), tin (Sn), indium (In), platinun (Pt), tungsten (W), nickel (Ni), chrome (Cr), aluninun (Al), and palladiun (Pd).
  • the surface of the metal wire 21 is coated with the white metal material 23
  • the surface of the metal wire 21 may be ultrasonic cleaned using alkali, an organic solvent, or ultrapure water.
  • the metal material 23 may coated on the surface of the metal wire 21 in a thickness of 0.1 - 20 /M. After coating the metal wire 21 with the metal material 23, heat treatment is performed. [105] The heat treatment, performed after coating with the metal material 23, is performed at atmospheric pressure or within a vacuum chamber of 0.1 mTorr or below at 50 - 300
  • Such white metal material 23, to which heat treatment is performed is surface treated. That is, the surface of the white metal material 23, to which heat treatment is performed, is chemically etched. Then, heat treatment is performed. Such process is needed for the transparent parylene film 24 or the transparent oxide film 25 to be easily formed on the white metal material 23.
  • surface treatment for the white metal material 23 is optional and [108] When chemical etching is performed to the surface of the metal material 23, a predetermined etching solution is used. That is, the surface of the metal material 23 is etched using an etching solution manufactured by mixing any one of or a mixture of HCl, H SO , HNO , and H O with H 0.
  • FIGS. 10 is a photomicrograph (magnified to five hundered times) of the NiTi formed metal wire 21 in which the surface thereof is coated with the white metal material 23 and then the surface of the metal material 23 is etched using a mixture solution of HNO and H O for eighteen seconds.
  • FIG. 11 is a photomicrograph
  • the surface of the metal material 23 is etched at 10-100 0 C for one second to five minutes. As above, chemical etching is performed to the surface of the metal material 23 and then heat treatment is performed. The heat treatment performed after chemcal etching of the surface of the metal material 23 is performed at atmospheric pressure or within a vacuun chamber of 0.1m Torr or below at 50 - 300 0 C for one minute to forty eight hours.
  • the transparent metal oxide film 24 is coated on the metal material 23 and then the tranparent parylene film 25 is formed on the transparent metal oxide film 24 (corresponding to FIG. 3) or the transparent parylene film 25 may be directly formed on the metal material 23 without coating the metal material 23 with the transparent metal oxide film 24 (corresponding to FIG. 2).
  • the transparent metal oxide film 24 may be formed on the metal amterial 23 using any one of sputtering, thermal vacuun evaporation, e-beam evaporation, and ion plating.
  • a sol-phase material formed of nanoparticle sized particles is coated using a vacuun spraying method so as to form the transparent metal oxide film 24 on the metal material 23.
  • the transparent metal oxide film 24 may be formed of any metal oxide that is transparent.
  • examples of the metal oxide may be a mixture of any one of or at least two of ITO, ZnO, TiO , Al O , Ta O , ZrO , SiO , GeO , Y O , La O , HfO ,
  • the transparent metal oxide film 24 may have a thickness which makes the user comfortable when wearing the wire for correcting a set of teeth.
  • a thickness of the transparent metal oxide film 24 may be 1 nm to 1 ⁇ m.
  • the transparent metal oxide film 24 When the transparent metal oxide film 24 is vacuum deposited, such vacuun deposition may be performed within a vacuum chamber at 15 °C-300 0 C and the transparent metal oxide film 24 is formed by flowing oxygen gas of 1 - 200 seem into the vacuun chamber. Then, the transparent metal oxide film 24 is plasma treated to be formed.
  • argon gas of 50-500 seem flows into the chamber and pressure of the chamber may be maintained to 1-20 mTorr during plasma treatment of the transparent metal oxide film 24.
  • the transparent parylene film 25 is formed on the transparent metal oxide film 24 and heat treatment is performed.
  • the parylene film 25 is coated so as to prevent the color of the white metal material 23 being changed and to form the wire for correcting a set of teeth that is harmelss to a hunan body.
  • the transparent parylene film 25 may have a thickness of 1-50 ⁇ m.
  • forming of the transparent metal oxide film 24 is not included. That is, the transparent parylene film 25 is directly formed on the white metal material 23.
  • the transparent parylene film 25 is formed on the transparent metal oxide film 24 using a dimer material.
  • the transparent parylene film 25 may be formed of at least one of C(Di-chloro-para-xylylene)-type (illustrated in FIG. 5A), N(Di-para-xylylene)-type (illustrated in FIG. 5B), D(Tetra-chloro-para-xylylene)-type frustrated in FIG. 5C), F(Octafluoro-[2,2]para-xylylene)-type frustrated in FIG. 5D), HT-type illustrated in FIG. 5E), A-type illustrated in FIG. 5F), and AM-type (illustrated in FIG. 5G) dimers.
  • the dimer is vaporized at 50-250 0 C within a vaporizer and passes through a pyrolysis of 550-850 0 C, thereby being decomposed into monomers. Then, partial pressure of the monomers is maintained to 10-100 mTorr and thus the monomers are deposited on the surface of the transparent metal oxide film 24.
  • heat treatment is performed. Such heat treatment is performed at atmospheric pressure or within a vacuun chamber of 0.1 mTorr or below at 50 - 250 0 C for one minute to forty eight hours. Through the heat treatment, coherence between each element of the wire for correcting a teeth increases and thus intensity of a whole wire increases.
  • the method for manufacturing a wire for correcting a set of teeth is executed as follows.
  • the metal wire 21 is manufactured using a metal alloy and the masking parylene film 27 is formed on the surface of the metal wire 21. Then, the masking parylene film 27 formed on the anterior teeth unit of the metal wire 21 is removed.
  • the surface of the anterior teeth unit of the metal wire 21 is physically or chemically etched and then, heat treatment is performed.
  • heat treatment allows the next process, that is, coating of the metal material 23, to be performed properly.
  • an etching process is performed and then, the heat treatment is performed, so as for the metal material 23 to be coated properly on the metal wire 21.
  • the etching and heat treatment are performed as in the same manner as in FIGS. 2 and 3.
  • the metal material 23 is coated only on the anterior teeth unit of the metal wire 21 or is coated for the surfaces of the anterior teeth unit and the masking parylene film 27 to be white and then, heat treatment is performed.
  • the white metal material 23 is coated only on the anterior teeth unit of the metal wire 21.
  • the white metal material 23 may be coated not only on the anterior teeth unit but also on the masking parylene film 27.
  • an electro-plating method may be used.
  • a deposition method may be used to coat the white metal material 23 simultaneously on the anterior teeth unit and the masking parylene film 27.
  • the transparent parylene film 25 is formed only on the white metal material 23 or on the white metal material 23 and the masking parylene film 27 and then, heat treatment is performed.
  • the transparent parylene film 25 and the heat treatment is same those of FIGS. 2 and 3.
  • the white metal material 23 is only coated on the anterior teeth unit of the metal wire 21 so that the transparent parylene film 25 is formed on the white metal material 23 coated on the anterior teeth unit and the masking parylene film 27 coated on the posterior teeth unit.
  • the transparent parylene film 25 may be also formed only on the white metal material 23 formed on the anterior teeth unit
  • the masking parylene film 27 and the transparent parylene film 25 sequentially formed on the posterior teeth unit of the metal wire 21, or the masking parylene film 27, the white metal material 23, and the transparent parylene film 25 which may be sequentially formed on the posterior teeth unit of the metal wire 21 are removed.
  • the masking parylene film 27 formed on the posterior teeth unit of the metal wire 21 may be removed by using various methods. For example, the masking parylene film 27 may be easily removed by being scratched with a knife and peeled off.
  • the wire for correcting a set of teeth may be used in a general dental surgery.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

Provided is a method for manufacturing a wire for correcting a set of teeth, and more particularly, to a method for manufacturing a wire for a set of teeth, which is harmless to a human body and by which a color of teeth maintains. The method includes: manufacturing a metal wire using a metal alloy; physically or chemically etching the surface of the metal wire and performing heat treatment; coating the surface of the metal wire with a white metal material and performing heat treatment; coating a transparent metal oxide film on the metal material that is coated on the surface of the metal wire; and forming a transparent parylene film on the white metal material and performing heat treatment.

Description

Description
METHOD FOR MANUFACTURING WIRE FOR CORRECTING A SET OF TEETH
Technical Field
[1] The present invention relates to a method for manufacturing a wire for correcting a set of teeth, and more particularly, to a method for manufacturing a wire for a set of teeth, which is harmless to a human body and by which a color of teeth maintains. Background Art
[2] Since periodontal tissue is broken gradually from the outer gums due to the progress of, for example, periodontitis, alveolar bone is gradually lost and thereby, tooth mobility, so-called alveolar pyorrhea, appears on the spot where periodontitis is generated. The treatment for alveolar pyorrhea includes two ways including tooth extraction for a tooth with increased tooth mobility so as to be hardly preserved, and fixation of a tooth capable of being preserved with the adjacent teeth with relatively low tooth mobility.
[3] When fixation of a tooth with the adjacent teeth is used, a metal wire is generally used. Here, the elasticity of the metal wire is used to tie the metal wire to the teeth to be fixed, and a load generated by the metal wire being bended or tensed is imposed on the teeth be fixed, thereby fixing the teeth due to imposed load.
[4] In the above method, a process to sequentially tie and attach the metal wire to the teeth to be fixed is needed, patients always feel a pain and suffer from inconvenience due to imposed load, and the metal wire is easily noticed when the patients open their mouth.
[5] Accordingly, a method of fixing a set of teeth by using a shape memory alloy has been currently introduced. In this method, a wire-form fixing member, which is a shape memory alloying agent, is thermally treated in advance, in order for a parent phase state shape to be a desired shape, that is, an anatomically corrected set of teeth, and the fixing member is appropriately set to patients under a low temperature. Then, the fixing member is heated to be back to the original shape and thus, a set of teeth is corrected by elasticity.
[6] FIGS. IA and IB are respectively a shematic view and a cross-sectional view of a conventional wire 10 for correcting a set of teeth.
[7] As illustrated in FIG. IA, an external shape of the wire 10 for correcting a set of teeth is similar to that of a general wire. However, the wire 10 for correcting a set of teeth is internally different from the general wire and thus, a shape and a manufacturing process of the wire 10 for correcting a set of teeth are described with reference to FIG. IB.
[8] FIG. IB is a cross-sectional view of the part "A" included in the wire 10 for correcting a set of teeth of FIG. IA.
[9] As illustrated in FIG. IB, the conventional wire 10 for correcting a set of teeth includes a metal wire 11 and a teflon coating film 13 formed on the surface of the metal wire 11. The metal wire 11 may be a general metal wire or a metal wire formed of a shape memory alloy. The teflon coating film 13 is formed on the surface of the metal wire 11 by various coating methods. The teflon coating film 13 is coated close to have a color of teeth.
[10] As described above, a teflon coating film is formed on the surface of a metal wire to create a color of teeth, conventionally. However, due to harmfulness of teflon to a human body, use of teflon becomes a problem. Therefore, providing a wire for correcting a set of teeth, which is harmless to a hunan body, is needed. Disclosure of Invention Technical Problem
[11] The present invention provides a method for manufacturing a wire for correcting a set of teeth which is harmless to a human body and by which a color of teeth maintains. Technical Solution
[12] According to an aspect of the present invention, there is provided a method for manufacturing wire for correcting a set of teeth, the method including: manufacturing a metal wire using a metal alloy; masking a posterior teeth unit of the metal wire by a mask which can surround the posterior teeth unit of the metal wire; physically or chemically etching the surface of the metal wire and performing heat treatment; coating the surface of the metal wire with a white metal material and performing heat treatment; and forming a transparent parylene film on the white metal material and performing heat treatment.
[13] According to another aspect of the present invention, there is provided a method for manufacturing wire for correcting a set of teeth, the method including: manufacturing a metal wire using a metal alloy; masking a posterior teeth unit of the metal wire by a mask which can surround the posterior teeth unit of the metal wire; physically or chemically etching the surface of the metal wire and performing heat treatment; coating the surface of the metal wire with a white metal material and performing heat treatment; coating a transparent metal oxide film on the metal material that is coated on the surface of the metal wire; and forming a transparent parylene film on the white metal material and performing heat treatment.
[14] According to another aspect of the present invention, there is provided a method for manufacturing wire for correcting a set of teeth, the method including: method for manufacturing wire for correcting a set of teeth, the method including: manufacturing a metal wire using a metal alloy; forming a masking parylene film on the surface of the metal wire and removing the masking parylene film formed on an anterior teeth unit of the metal wire; physically or chemically etching the surface of the anterior teeth unit of the metal wire and performing heat treatment; coating only the anterior teeth unit of the metal wire, or the surfaces of the anterior teeth unit and the masking parylene film with a white metal material and performing heat treatment; forming a transparent parylene film on the white metal material and performing heat treatment; and removing the masking parylene film and the transparent parylene film, or the masking parylene film, the white metal material, and the transparent parylene film which are sequentially formed on the posterior teeth unit of the metal wire.
[15] The metal wire may be formed of any one of stainless, NiTi, a nickel (Ni) base alloy, a titaniun (Ti) base alloy, a copper (Cu) base alloy, and an aluminun (Al) base alloy.
[16] The method may further include wet cleaning the metal wire using alkali, an organic solvent, or ultrapure water, before physically or chemically etching of the surface of the metal wire.
[17] The surface of the metal wire may be etched using an etching solution manufactured by mixing any one of or a mixture of CuCl , FeCl , HCl, H SO , HNO , H PO , HF,
2 3 2 4 3 3 4 and H O with H O or an organic solvent.
2 2 2
[18] The surface of the metal wire may be electrochemically etched or electrolessly etched in the etching solution.
[19] The metal wire may have a curve having a width or a depth of 0.1-50 μm.
[20] The metal wire may be wet cleaned by using any one of alkali, an organic solvent, and water [21] The surface of the metal wire may be etched by using sand blasting, in which ceramics or metal fine particles are used.
[22] The metal fine particles may have a sizes of 1 ran- 100 μm.
[23] The heat treatment, performed after physically or chemically etching of the surface of the metal wire, may be performed at atmospheric pressure or within a vacuun chamber at 50-300 0C for one minute to forty eight hours. [24] The metal material coated on the surface of the metal wire may be coated using a wet electro-plating method or a dry plating method. [25] The metal material coated on the surface of the metal wire may include any one of or a mixture of silver (Ag), zinc (Zn), tin (Sn), indium (In), platinum (Pt), tungsten (W), nickel (Ni), chrome (Cr), aluminum (Al), and palladium (Pd). [26] The metal material coated on the surface of the metal wiremay have a thickness of
0.1-20 /an. [27] The metal material coated on the surface of the metal wire may be formed by using any one of sputtering using plasma, thermal vacuum evaporation, e-beam evaporation, ion plating, vacuum spraying, and wet electro-plating. [28] The method may further include ultrasonic cleaning the surface of the metal wire using alkali, an organic solvent, or ultrapure water, after coating the surface of the metal wire with the white metal material. [29] The heat treatment, performed after coating the metal material on the surface of the metal wire, may be performed at atmospheric pressure or within a vacuum chamber at
50-300 0C for one minute to forty eight hours. [30] The heat treatment may be performed to the surface of the white metal material after chemically etching the surface of the metal wire.
[31] The surface of the metal material may be etched using an etching solution manufactured by mixing any one of or a mixture of HCl, H2SO4, HN03, and H2O2 with
H2O. [32] The surface of the metal material may be etched at 10-100 0C for one second to five minutes. [33] The heat treatment, performed after chemically etching the surface of the metal material, may be performed at atmospheric pressure or within a vacuum chamber at
50-300 0C for one minute to forty eight hours. [34] The transparent metal oxide film may be formed by coating a sol-phase material formed of nanoparticle sized particles using a vacuum spraying method. [35] The transparent metal oxide film may be formed by using any one of sputtering, thermal vacuum evaporation, e-beam evaporation, and ion plating. [36] The transparent metal oxide film may include any one of or a mixture of ITO, ZnO,
TiO2, A12O3, Ta2O5, ZrO2, SiO2, GeO2, Y2O3, La2O3, HfO2, CaO, In2O3, SnO2,
MgO, WO2, and WO3. [37] The transparent metal oxide film may have a thickness of 1 nm-1 μm. [38] The transparent metal oxide film may be coated in a vacuun chamber at 15-300 0C.
[39] The transparent parylene film may include at least one of
C(Di-chloro-para-xylylene)-type, N(Di-para-xylylene)-type,
D(Tetra-chloro-para-xylylene)-type, F(OctafTuoro-[2,2]para-xylylene)-type, HT-type,
A-type, and AM-type dimers.
[40] The transparent parylene film may have a thickness of 1-50 μm.
[41] The heat treatment, performed after forming the transparent parylene film, may be performed at atmospheric pressure or within a vacuun chamber at 50-250 0C for one minute to forty eight hours. [42] The mask may be formed of a polymer or a metal material.
Advantageous Effects
[43] In the method for manufacturing a wire for correcting a set of teeth according to the embodiments of the present invention, a transparent metal material is coated on the wire for correcting a set of teeth and then a transparent parylene film is coated so that a color of the transparent metal material can be prevented from being changed. Also, since a user feel comfortable while wearing the wire for correcting a set of teeth, aversion of the user can be reduced.
[44] In addition, since a parylene film is coated on the outermost surface, the wire for correcting a set of teeth is harmless to a human body and is soft so that a user feels more comfortable of wearing it.
[45] Moreover, the parylene film is not formed on a part (posterior teeth unit) of the wire for correcting a set of teeth (back teeth) and only a metal wire is formed, instead, more force can be given to the back teeth and thus sliding effect can be improved.
[46] While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention . Brief Description of the Drawings
[47] FIGS. IA and IB are respectively a shematic view and a cross-sectional view of a conventional wire for correcting a set of teeth;
[48] FIGS. 2A and 2B are respectively a shematic view and a cross-sectional view of a wire for correcting a set of teeth according to an embodiment of the present invention;
[49] FIG. 3 illustrate a metal wire of which a posterior teeth unit is masked according to another embodiment of the present invention; [50] FIG. 4 illustrates processes for manufacturing a wire for correcting a set of teeth in which a parylene film is not coated on posterior teeth unit of a metal wire according to another embodiment of the present invention;
[51] FIG. 5 illustrates structural formulas of dimers according to an embodiment of the present invention;
[52] FIGS. 6 through 9 are photomicrographs of surfaces of a metal wire, wherein the surfaces are treated according to an embodiment of the present invention; and
[53] FIGS. 10 and 11 are photomicrographs of a metal wire in which surface treatment is peformed by using a white metal.
[54]
Best Mode for Carrying Out the Invention
[55] FIGS. 2A and 2B are respectively a shematic view and a cross-sectional view of a wire 20 for correcting a set of teeth manufactured by using a method for manufacturing a wire for correcting a set of teeth according to the present invention.
[56] As illustrated in FIG. 2A, an external shape of the wire 20 for correcting a set of teeth is similar to that of a general wire. However, the wire 20 for correcting a set of teeth is internally different from the general wire and thus, a shape and a manufacturing process of the wire 20 for correcting a set of teeth are described with reference to FIG. 2B.
[57] FIG. 2B is a cross-sectional view of the part "A" included in the wire 20 for correcting a set of teeth of FIG. 2A.
[58] As illustrated in FIG. 2B, the wire 20 for correcting a set of teeth according to the current embodiment includes a long metal wire 21, a white metal material 23 coated on the surface of the metal wire 21, a transparent metal oxide film 24 coated on the surface of the metal material 23, and a transparent parylene film 25 formed on the transparent metal oxide film 24. The transparent metal oxide film 24 may be interposed between the white metal material 23 and the transparent parylene film 25 or may not exist.
[59] The metal wire 21 may be formed of a general metal material or a metal alloy including a shape memory alloy material. Examples of the metal alloys for forming the metal wire 21 may include any one of stainless, NiTi, a nickel (Ni) base alloy, a titanium (Ti) base alloy, a copper (Cu) base alloy, and an aluninun (Al) base alloy.
[60] In general, if a metal is transformed beyond the elastic limit, the metal does not return to its original shape, even if the metal is heated or cooled. However, if seme of alloys are formed to have an appropriate shape under a high temperature, are transformed in room temperature, and then, are heated again, such alloys return to its original formed shape.
[61] This is denoted as the shape memory effect and such effect occurs since the alloy memorizes the given shape as in atomic arrangement. Such effect occurs in an alloy which is not diffused and is transformed. Here, parent phase atomic arrangement in a high temperature is memorized, when the alloy is tranformed in a low temperature, and original atomic arrangement appears again in a high temperature.
[62] Due to such effect, an original shape returs and a large force is generated. As a large force is generated, the shape memory alloy may be used not only in a sensor but also in tightening maching parts. Accordingly, the metal wire formed of a shape memory alloy may be used to correct a set of teeth.
[63] The metal material 23 coated on the surface of the metal wire 21, which is formed of a shape memory alloy and a generatl metal alloy, allows white, which is a color closed to a color of teeth, to be appeared on the surface of the metal wire 21.
[64] The metal material 23 coated on the surface of the metal wire 21 is coated by using a wet electro-plating method or a dry plating method.
[65] Examples of the white metal material 23 coated on the surface of the metal wire 21 may include any one of or a mixture of at least two of silver (Ag), zinc (Zn), tin (Sn), indium (In), platinun (Pt), tungsten (W), nickel (Ni), chrome (Cr), aluninun (Al), and palladiun (Pd).
[66] The transparent metal oxide film 24 may be coated on the surface of the white metal material 23. Here, any one of or a mixture of ITO, ZnO, TiO , Al O , Ta O , ZrO , SiO
2 2 3 2 5 2
GeO , Y O , La O , HfO , CaO, In O , SnO , MgO, WO , and WO is vacuim
2, 2 2 3 2 3 2 2 3 2 2 3 deposited to form the transparent metal oxide film 24.
[67] The transparent metal oxide film 24 may have a thickness of lnm to lμm and may be formed by using any one of sputtering using plasma, e-beam evaporation, thermal evaporation, and ion plating. In addition, a sol-phase material formed of nanoparticle sized particles is coated using a vacuun spraying method so as to form the transparent metal oxide film 24.
[68] The transparent parylene film 25, which is a polymer compound, is coated on the white metal material 23 or the transparent metal oxide film 24. The transparent parylene film 25 coated on the surface of the transparent metal oxide film 24 may have a thickness of 1 μm to 50 μm.
[69] Parylene is verified as a haremless material, may be uniformly coated on the surface of the transparent metal oxide film 24, has smooth surface roughness, and is soft. Thus, if the wire for correcting a set of teeth on which parylene is coated is worn, patients feel comfortable.
Mode for the Invention
[70] A method for manufacturing a wire for correcting a set of teeth according to embodiments of the present invention is now described.
[71] The method for manufacturing a wire for correcting a set of teeth according to the embodiment includes: manufacturing a metal wire using a metal alloy; masking a posterior teeth unit of the metal wire by a mask, which may surround the posterior teeth unit of the metal wire; physically or chemically etching the surface of the metal wire and then, performing heat treatment; coating a white matel material on the surface of the metal wire so as for the metal wire to be white and then, performing heat treatment; and forming a transparent parylene film on the white metal material and performing heat treatment.
[72] Here, the posterior teeth unit of the metal wire is denoted as a part for correcting back teeth in the wire for correcting a set of teeth. Accordingly, an anterior teeth unit of the metal wire is denoted as a part for correcting front teeth and canine teeth in the wire for correcting a set of teeth.
[73] The posterior teeth unit of the metal wire, which is the part for correcting back teeth, is masked to correct the back teeth only by using the metal wire on which the parylene film is not coated. More force is needed in correcting back teeth than in front teeth and canine teeth and sliding effect of the wire for correcting a set of teeth may be excellent during correcting.
[74] As described above, in order to provide more force to back teeth and to improve sliding effect, a parylene film may not be formed on the part for correcting back teeth, that is, the posterior teeth unit, and the posterior teeth unit may be only formed of a metal wire. Accordingly, in manufacturing a wire for correcting a set of teeth, masking the posterior teeth unit of the metal wire by a mask is needed.
[75] FIG. 3 illustrate the metal wire 21 of which the posterior teeth unit is masked by a mask. As one of the methods of masking the posterior teeth unit of the metal wire 21 by a mask, a tube 27 formed of an elastic material or a box for putting the posterior teeth unit in may be attached to the posterior teeth unit of the metal wire 21. Here, the elastic tube 27 or the box used as the mask may be formed of a polymer or metal material. That is, the mask may be formed of polymer such as silicon or a rubber material such as urethane.
[76] As another method of masking the posterior teeth unit of the metal wire 21, a masking jig may be used so as for the posterior teeth unit to not be exposed outside. Then, the posterior teeth unit may be prevented from being coated by parylene. The masking jig is formed of a polymer, a metal, or a rubber material and masks and fixes the posterior teeth unit. Then, although parylene coating is performed, the posterior teeth unit is not coated by parylene.
[77] The method for manufacturing a wire for correcting a set of teeth according to another embodiment further includes coating a transparent metal oxide film, in addition to the method for manufacturing a wire for correcting a set of teeth according to the previous embodiment.
[78] That is, in the current embodiment, coating the transparent metal oxide film on the white metal material before forming the transparent parylene film on the whilte metal material, in addition to masking the posterior teeth unit of the metal wire before physically or chemically etching the surface of the metal wire. Thus, the transparent metal oxide film is interposed betweeh the white metal material and the transparent parylene film.
[79] In the method for manufacturing a wire for correcting a set of teeth according to another embodiment, the posterior teeth unit of the metal wire is not coated with the parylene film as in first two embodiments. However, in the current embodiment, a tube or a jig is not used in masking and instead, the parylene film is used in masking.
[80] FIG. 4 illustrates processes for the method for manufacturing a wire for correcting a set of teeth according to the current embodiment.
[81] As illustrated in FIG. 4, manufacturing a wire for correcting a set of teeth according to the current embodiment is performed as follows.
[82] In Sl, the metal wire 21 is manufactured using a metal alloy and a masking parylene film 27 is formed on the surface of the metal wire 21. Then, the masking parylene film 27 formed on an anterior teeth unit of the metal wire 21 is removed.
[83] Then, the surface of the anterior teeth unit of the metal wire 21 is physically or chemically etched and then, heat treatment is performed. Such treatment allows the next process, that is, coating of the metal material 23, to be performed properly. In other words, an etching process is performed and then, heat treatment is performed, so as for the metal material 23 to be coated properly on the metal wire 21.
[84] Then, in S2, the metal material 23 is coated only on the anterior teeth unit of the metal wire 21 or is coated for the surfaces of the anterior teeth unit and the masking parylene film 27 to be white and then, heat treatment is performed. In FIG.4, the white metal material 23 is coated only on the anterior teeth unit of the metal wire 21. However, in seme cases, the white metal material 23 may be coated not only on the anterior teeth unit but also on the masking parylene film 27. In order to coat the white metal material 23 on the anterior teeth unit, an electro-plating method may be used. In order to coat the white metal material 23 simultaneously on the anterior teeth unit and the masking parylene film 27, a deposition method may be used.
[85] Then, in S3, the transparent parylene film 25 is formed only on the white metal material 23 or on the white metal material 23 and the masking parylene film 27 and then, heat treatment is performed. In FIG. 4, the white metal material 23 is only coated on the anterior teeth unit of the metal wire 21 so that the transparent parylene film 25 is formed on the white metal material 23 coated on the anterior teeth unit and the masking parylene film 27 coated on the posterior teeth unit. In this case, the transparent parylene film 25 may be also formed only on the white metal material 23 formed on the anterior teeth unit.
[86] Then, in S4, the masking parylene film 27 and the transparent parylene film 25 sequentially formed on the posterior teeth unit of the metal wire 21, or the masking parylene film 27, the white metal material 23, and the transparent parylene film 25 which may be sequentially formed on the posterior teeth unit of the metal wire 21 are removed. In FIG. 4, since the posterior teeth unit is not coated with the white metal material 23, the masking parylene film 27 and the transparent parylene film 25 are removed. As such, the masking parylene film 27 formed on the posterior teeth unit of the metal wire 21 may be removed by using various methods. For example, the masking parylene film 27 may be easily removed by being scratched with a knife and peeled off.
[87] Each process of the method for manufacturing a wire for correcting a set of teeth described above is now described in more detail.
[88] Firstly, the metal wire 21 is manufactured using a metal alloy. That is, the metal wire
21 is manufactured by using any one of metal alloys including a nickel (Ni) base alloy, stainless steel (SUS), NiTi, titaniun (Ti) base alloy, a copper (Cu) base alloy, and an aluninun (Al) base alloy. Then, the metal wire 21 may have elasticity and a tensile force.
[89] When the metal wire 21 is manufactured, the posterior teeth unit of the metal wire 21 is masked by the mask, which may surround the posterior teeth unit of the metal wire 21, before performing surface treatment (physical or chemical etching) for the metal wire 21 in first two embodiments. Such a masking process aims to prevent the parylene film 25 being formed on the posterior teeth unit of the metal wire 21. [90] The mask may be the elastic tube 27, a box for putting the posterior teeth unit of the metal wire 21 therein, or a masking jig for the posterior teeth unit of the metal wire 21 to not be exposed outside. The mask may be formed of a polymer, a metal material, or a rubber material. That is, the mask may be formed of a polymer such as silicon, a rubber material such as as urethane, or other various metal materials.
[91] In other words, since the posterior teeth unit of the wire for correcting a set of teeth is formed of only a metal wire, instead of the parylene film, a large force is given to back teeth and sliding effect is improved, thereby facilitating correction of back teeth.
[92] As described above, in the first two embodiments, the posterior teeth unit of the metal wire 21 is masked by the mask, which may surround the posterior teeth unit of the metal wire 21, and then physical or chemical etching is performed for the metal wire 21, followed by peforming heat treatment.
[93] In other words, after masking of the posterior teeth unit of the metal wire 21, the surface of the metal wire 21 is physically or chemically etched. Then, heat treatment is performed. Before physically or chemically etching of the surface of the metal wire 21, alkali, an organic solvent, or ultrapure water may be used for wet cleaning the surface of the metal wire 21. That is, the surface of the metal wire 21 may be cleaned before performing physical or chemical etching.
[94] The surface of the metal wire 21 may be etched by using an etching solution that may form a predetermined curve. In the embodiments of the present invention, the etching solution may be manufactured by mixing any one of or a mixture of CuCl 2 ,
FeCl , HCl, H SO , HNO , H PO , HF, and H O with H O or an organic solvent
3 2 4 3 3 4 2 2 2
(methanol, ethanol,or isopropyl alcohol).
[95] While the metal wire 21 is filled in the etching solution, electrochemical etching or electroless etching is performed to the surface of the metal wire 21. Accordingly, the surface of the metal wire 21 has a predetermined form of a curve. That is, a curve having a depth and a width of 0.1 - 50 μm is formed on the surface of the metal wire 21. The surface of the metal wire may be wet cleaned by using any one of alkali, a solvent, and water.
[96] Meanwhile, etching of the surface of the metal wire 21 may be performed by using sand blasting, in which ceramics or metal fine particles are used. When the surface of the metal wire 21 is etched using sand blasting, irregular grooves are formed on the surface of the metal wire 21. A size of the fine particles used in sand blasting may be in the range of lnm - 100 μm.
[97] FIGS. 6 through 9 are photomicrographs of the surfaces of the metal wire 21 that are electrochemically etched. In FIG. 6, the stainless (SUS) formed metal wire 21 is etched using HCl for twenty minutes (at 45 0C). In FIG. 7, the stainless (SUS) formed metal wire 21 is etched using a mixture solution of an sulfuric acid and water mixed in the ratio of one to two for five minutes (at 70 0C). In FIG. 8, NiTi formed metal wire 21 is etched using a FeCl solution for one minute (at 40 0C). In FIG. 9, NiTi formed metal
3 wire 21 is etched using FeCl solution for one minutes (at 5O0C). [98] The surface of the metal wire 21 that is physically or chemically etched is heat treated under a predetermined condition. After performing chemical etching, heat treatment is performed at atmospheric pressure or within a vacuun chamber of 0.1 mTorr or below. Such heat treatment may be performed at 50 - 300 0C for one minute to forty eight hours. [99] Surface treatment and heat treatment are performed in the same manner as in the previous embodiment. [100] The heat treated metal wire 21 is coated with the metal material 23 so as to be appeared as white. The metal material 23 deposited on the surface of the metal wire 21 may be coated by a wet electro-plating method or a dry plating method. [101] In addition, the metal material 23 may be coated on the surface of the metal wire 21 by using any one of sputtering, thermal vacuun evaporation, e-beam evaporation, ion plating, vacuum spraying, and wet electro-plating. [102] The metal material 23, that is deposited on the surface of the metal wire 21 and is white, may be a mixture of any one of or at least two of silver (Ag), zinc (Zn), tin (Sn), indium (In), platinun (Pt), tungsten (W), nickel (Ni), chrome (Cr), aluninun (Al), and palladiun (Pd). [103] When the surface of the metal wire 21 is coated with the white metal material 23, the surface of the metal wire 21 may be ultrasonic cleaned using alkali, an organic solvent, or ultrapure water. [104] The metal material 23 may coated on the surface of the metal wire 21 in a thickness of 0.1 - 20 /M. After coating the metal wire 21 with the metal material 23, heat treatment is performed. [105] The heat treatment, performed after coating with the metal material 23, is performed at atmospheric pressure or within a vacuum chamber of 0.1 mTorr or below at 50 - 300
0C for one minute to forty eight hours. [106] Such white metal material 23, to which heat treatment is performed, is surface treated. That is, the surface of the white metal material 23, to which heat treatment is performed, is chemically etched. Then, heat treatment is performed. Such process is needed for the transparent parylene film 24 or the transparent oxide film 25 to be easily formed on the white metal material 23.
[107] However, surface treatment for the white metal material 23 is optional and [108] When chemical etching is performed to the surface of the metal material 23, a predetermined etching solution is used. That is, the surface of the metal material 23 is etched using an etching solution manufactured by mixing any one of or a mixture of HCl, H SO , HNO , and H O with H 0.
2 4 3 2 2 2
[109] FIGS. 10 is a photomicrograph (magnified to five hundered times) of the NiTi formed metal wire 21 in which the surface thereof is coated with the white metal material 23 and then the surface of the metal material 23 is etched using a mixture solution of HNO and H O for eighteen seconds. FIG. 11 is a photomicrograph
3 2
(magnified to five hundered times) of the stainless (SUS) formed metal wire 21 in which the surface thereof is coated with the white metal material 23 and then the surface of the metal material 23 is etched using a mixture solution of HNO and H O
3 2 for fifty seconds.
[110] The surface of the metal material 23 is etched at 10-100 0C for one second to five minutes. As above, chemical etching is performed to the surface of the metal material 23 and then heat treatment is performed. The heat treatment performed after chemcal etching of the surface of the metal material 23 is performed at atmospheric pressure or within a vacuun chamber of 0.1m Torr or below at 50 - 300 0C for one minute to forty eight hours.
[I l l] After the surface etching is performed to the metal material 23 and then the heat treatment is performed, the transparent metal oxide film 24 is coated on the metal material 23 and then the tranparent parylene film 25 is formed on the transparent metal oxide film 24 (corresponding to FIG. 3) or the transparent parylene film 25 may be directly formed on the metal material 23 without coating the metal material 23 with the transparent metal oxide film 24 (corresponding to FIG. 2).
[112] The transparent metal oxide film 24 may be formed on the metal amterial 23 using any one of sputtering, thermal vacuun evaporation, e-beam evaporation, and ion plating.
[113] Meanwhile, a sol-phase material formed of nanoparticle sized particles is coated using a vacuun spraying method so as to form the transparent metal oxide film 24 on the metal material 23.
[114] The transparent metal oxide film 24 may be formed of any metal oxide that is transparent. Here, examples of the metal oxide may be a mixture of any one of or at least two of ITO, ZnO, TiO , Al O , Ta O , ZrO , SiO , GeO , Y O , La O , HfO ,
2 2 3 2 5 2 2 2 2 3 2 3 2
CaO, In O , SnO , MgO, WO , and WO .
2 3 2 2 3
[115] The transparent metal oxide film 24 may have a thickness which makes the user comfortable when wearing the wire for correcting a set of teeth. A thickness of the transparent metal oxide film 24 may be 1 nm to 1 μm.
[116] When the transparent metal oxide film 24 is vacuum deposited, such vacuun deposition may be performed within a vacuum chamber at 15 °C-300 0C and the transparent metal oxide film 24 is formed by flowing oxygen gas of 1 - 200 seem into the vacuun chamber. Then, the transparent metal oxide film 24 is plasma treated to be formed. Here, argon gas of 50-500 seem flows into the chamber and pressure of the chamber may be maintained to 1-20 mTorr during plasma treatment of the transparent metal oxide film 24.
[117] After the transparent metal oxide film 24 is formed on the metal material 23 as described above, the transparent parylene film 25 is formed on the transparent metal oxide film 24 and heat treatment is performed. The parylene film 25 is coated so as to prevent the color of the white metal material 23 being changed and to form the wire for correcting a set of teeth that is harmelss to a hunan body. The transparent parylene film 25 may have a thickness of 1-50 μm.
[118] In the embodiment with reference to FIG. 2, forming of the transparent metal oxide film 24 is not included. That is, the transparent parylene film 25 is directly formed on the white metal material 23.
[119] The transparent parylene film 25 is formed on the transparent metal oxide film 24 using a dimer material. For example, the transparent parylene film 25 may be formed of at least one of C(Di-chloro-para-xylylene)-type (illustrated in FIG. 5A), N(Di-para-xylylene)-type (illustrated in FIG. 5B), D(Tetra-chloro-para-xylylene)-type frustrated in FIG. 5C), F(Octafluoro-[2,2]para-xylylene)-type frustrated in FIG. 5D), HT-type illustrated in FIG. 5E), A-type illustrated in FIG. 5F), and AM-type (illustrated in FIG. 5G) dimers.
[120] The dimer is vaporized at 50-250 0C within a vaporizer and passes through a pyrolysis of 550-850 0C, thereby being decomposed into monomers. Then, partial pressure of the monomers is maintained to 10-100 mTorr and thus the monomers are deposited on the surface of the transparent metal oxide film 24.
[121] After the transparent parylene film 25 is formed, heat treatment is performed. Such heat treatment is performed at atmospheric pressure or within a vacuun chamber of 0.1 mTorr or below at 50 - 250 0C for one minute to forty eight hours. Through the heat treatment, coherence between each element of the wire for correcting a teeth increases and thus intensity of a whole wire increases.
[122] As described with reference to FIG. 4, the method for manufacturing a wire for correcting a set of teeth is executed as follows.
[123] First, in Sl, the metal wire 21 is manufactured using a metal alloy and the masking parylene film 27 is formed on the surface of the metal wire 21. Then, the masking parylene film 27 formed on the anterior teeth unit of the metal wire 21 is removed.
[124] Then, the surface of the anterior teeth unit of the metal wire 21 is physically or chemically etched and then, heat treatment is performed. Such heat treatment allows the next process, that is, coating of the metal material 23, to be performed properly. In other words, an etching process is performed and then, the heat treatment is performed, so as for the metal material 23 to be coated properly on the metal wire 21. The etching and heat treatment are performed as in the same manner as in FIGS. 2 and 3.
[125] Then, in S2, the metal material 23 is coated only on the anterior teeth unit of the metal wire 21 or is coated for the surfaces of the anterior teeth unit and the masking parylene film 27 to be white and then, heat treatment is performed. In FIG.4, the white metal material 23 is coated only on the anterior teeth unit of the metal wire 21. However, in seme cases, the white metal material 23 may be coated not only on the anterior teeth unit but also on the masking parylene film 27. In order to coat the white metal material 23 on the anterior teeth unit, an electro-plating method may be used. In order to coat the white metal material 23 simultaneously on the anterior teeth unit and the masking parylene film 27, a deposition method may be used
[126] Then, in S3, the transparent parylene film 25 is formed only on the white metal material 23 or on the white metal material 23 and the masking parylene film 27 and then, heat treatment is performed. The transparent parylene film 25 and the heat treatment is same those of FIGS. 2 and 3. In FIG. 4, the white metal material 23 is only coated on the anterior teeth unit of the metal wire 21 so that the transparent parylene film 25 is formed on the white metal material 23 coated on the anterior teeth unit and the masking parylene film 27 coated on the posterior teeth unit. In this case, the transparent parylene film 25 may be also formed only on the white metal material 23 formed on the anterior teeth unit
[127] Then, in S4, the masking parylene film 27 and the transparent parylene film 25 sequentially formed on the posterior teeth unit of the metal wire 21, or the masking parylene film 27, the white metal material 23, and the transparent parylene film 25 which may be sequentially formed on the posterior teeth unit of the metal wire 21 are removed. In FIG. 4, since the posterior teeth unit is not coated with the white metal material 23, the masking parylene film 27 and the transparent parylene film 25 are removed. As such, the masking parylene film 27 formed on the posterior teeth unit of the metal wire 21 may be removed by using various methods. For example, the masking parylene film 27 may be easily removed by being scratched with a knife and peeled off.
Industrial Applicability According to the present invention, the wire for correcting a set of teeth may be used in a general dental surgery.

Claims

Claims
[1] A method for manufacturing a wire for correcting a set of teeth, the method comprising: manufacturing a metal wire using a metal alloy; masking a posterior teeth unit of the metal wire by a mask which can surround the posterior teeth unit of the metal wire; physically or chemically etching the surface of the metal wire and performing heat treatment; coating the surface of the metal wire with a white metal material and performing heat treatment; and forming a transparent parylene film on the white metal material and performing heat treatment.
[2] A method for manufacturing a wire for correcting a set of teeth, the method comprising: manufacturing a metal wire using a metal alloy; masking a posterior teeth unit of the metal wire by a mask which can surround the posterior teeth unit of the metal wire; physically or chemically etching the surface of the metal wire and performing heat treatment; coating the surface of the metal wire with a white metal material and performing heat treatment; coating a transparent metal oxide film on the metal material that is coated on the surface of the metal wire; and forming a transparent parylene film on the white metal material and performing heat treatment.
[3] A method for manufacturing a wire for correcting a set of teeth, the method comprising: manufacturing a metal wire using a metal alloy; forming a masking parylene film on the surface of the metal wire and removing the masking parylene film formed on an anterior teeth unit of the metal wire; physically or chemically etching the surface of the anterior teeth unit of the metal wire and performing heat treatment; coating only the anterior teeth unit of the metal wire, or the surfaces of the anterior teeth unit and the masking parylene film with a white metal material and performing heat treatment; forming a transparent parylene film on the white metal material and performing heat treatment; and removing the masking parylene film and the transparent parylene film, or the masking parylene film, the white metal material, and the transparent parylene film which are sequentially formed on the posterior teeth unit of the metal wire.
[4] The method of any one of claims 1-3, wherein the metal wire is formed of any one of stainless, NiTi, a nickel (Ni) base alloy, a titaniun (Ti) base alloy, a copper (Cu) base alloy, and an aluninum (Al) base alloy.
[5] The method of any one of claims 1-3, further comprising wet cleaning the metal wire using alkali, an organic solvent, or ultrapure water before physically or chemically etching of the surface of the metal wire.
[6] The method of any one of claims 1-3, wherein the surface of the metal wire is etched using an etching solution manufactured by mixing any one of or a mixture of CuCl , FeCl , HCl, H SO , HNO , H PO , HF, and H O with H O or an
2 3 2 4 3 3 4 2 2 2 organic solvent.
[7] The method of claim 6, wherein the surface of the metal wire is electro- chemically etched or electrolessly etched in the etching solution.
[8] The method of claim 7, wherein the metal wire has a curve having a width or a depth of 0.1 -50 /an.
[9] The method of claim 7, wherein the metal wire is wet cleaned by using any one of alkali, an organic solvent, and water.
[10] The method of any one of claims 1-3, wherein the surface of the metal wire is etched by using sand blasting, in which ceramics or metal fine particles are used.
[11] The method of claim 10, wherein the metal fine particles have a sizes of 1 ran- 100 /M.
[12] The method of any one of claims 1-3, wherein the heat treatment, performed after physically or chemically etching of the surface of the metal wire, is performed at atmospheric pressure or within a vacuun chamber at 50-300 0C for one minute to forty eight hours.
[13] The method of any one of claims 1-3, wherein the metal material coated on the surface of the metal wire is coated using a wet electro-plating method or a dry plating method.
[14] The method of claim 13, wherein the metal material coated on the surface of the metal wire comprises any one of or a mixture of silver (Ag), zinc (Zn), tin (Sn), indium (In), platinum (Pt), tungsten (W), nickel (Ni), chrome (Cr), aluminum
(Al), and palladium (Pd).
[15] The method of claim 13, wherein the metal material coated on the surface of the metal wire has a thickness of 0.1-20 μm.
[16] The method of any one of claims 1-3, wherein the metal material coated on the surface of the metal wire is formed by using any one of sputtering using plasma, thermal vacuum evaporation, e-beam evaporation, ion plating, vacuum spraying, and wet electro-plating.
[17] The method of any one of claims 1-3, further comprising ultrasonic cleaning the surface of the metal wire using alkali, an organic solvent, or ultrapure water, after coating the surface of the metal wire with the white metal material.
[18] The method of any one of claims 1-3, wherein the heat treatment, performed after coating the metal material on the surface of the metal wire, is performed at atmospheric pressure or within a vacuum chamber at 50-300 0C for one minute to forty eight hours.
[19] The method of any one of claims 1-3, wherein the heat treatment is performed to the surface of the white metal material after chemically etching the surface of the metal wire.
[20] The method of claim 19, wherein the surface of the metal material is etched using an etching solution manufactured by mixing any one of or a mixture of
HCl, H SO , HNO , and H O with H O.
2 4 3 2 2 2
[21] The method of claim 20, wherein the surface of the metal material is etched at
10-100 0C for one second to five minutes.
[22] The method of claim 19, wherein the heat treatment, performed after chemically etching the surface of the metal material, is performed at atmospheric pressure or within a vacuum chamber at 50-300 0C for one minute to forty eight hours.
[23] The method of claim 2, wherein the transparent metal oxide film is formed by coating a sol-phase material formed of nanoparticle sized particles using a vacuum spraying method.
[24] The method of claim 2, wherein the transparent metal oxide film is formed by using any one of sputtering, thermal vacuum evaporation, e-beam evaporation, and ion plating. [25] The method of claim 2, wherein the transparent metal oxide film comprises any one of or a mixture of ITO, ZnO, TiO , Al O , Ta O , ZrO , SiO , GeO , Y O ,
2 2 3 2 5 2 2 2 2 3
La O , HfO , CaO, In O , SnO , MgO, WO , and WO .
2 3 2 2 3 2 2 3
[26] The method of claim 25, wherein the transparent metal oxide film has a thickness of 1 nm-1 μm.
[27] The method of claim 25, wherein the transparent metal oxide film is coated in a vacuun chamber at 15-300 0C.
[28] The method of any one of claims 1-3, wherein the transparent parylene film comprises at least one of C(Di-chloro-para-xylylene)-type, N(Di-para-xylylene)-type, D(Tetra-chloro-para-xylylene)-type, F(OctafTuoro-[2,2]para-xylylene)-type, HT-type, A-type, and AM-type dimers.
[29] The method of claim 28, wherein the transparent parylene film has a thickness of
1-50 μm.
[30] The method of any one of claims 1-3, wherein the heat treatment, performed after forming the transparent parylene film, is performed at atmospheric pressure or within a vacuum chamber at 50-250 0C for one minute to forty eight hours.
[31] The method of claim 1 or claim 2, wherein the mask is formed of a polymer or a metal material.
PCT/KR2008/005752 2007-10-01 2008-09-30 Method for manufacturing wire for correcting a set of teeth WO2009045036A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0098536 2007-10-01
KR1020070098536A KR100919900B1 (en) 2007-05-28 2007-10-01 method for manufacturing wire for correcting a set of teeth

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014093987A1 (en) * 2012-12-14 2014-06-19 Park Istre Ii, Llc Methods for making colored dental parts
EP2990006A4 (en) * 2013-04-27 2016-11-23 Danybmt Co Ltd Method for manufacturing coating wire for correcting teeth arrangement
US10543061B2 (en) 2014-10-03 2020-01-28 3M Innovative Properties Company Methods for managing the scattering of incident light and articles created therefrom
WO2020065538A1 (en) 2018-09-26 2020-04-02 3M Innovative Properties Company Parylene dental articles
CN112472096A (en) * 2020-12-11 2021-03-12 西北工业大学 Stress-induced self-curling reticular cuff nerve electrode and preparation method thereof

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US5063082A (en) * 1988-06-03 1991-11-05 Loren Adell Method of making coated metallic orthodontic arch wire
JP2004236772A (en) * 2003-02-04 2004-08-26 Tomii Kk Implement for correction of dentition and manufacturing method for the same
JP2005323694A (en) * 2004-05-12 2005-11-24 Hiroshima Univ Dental article and its production method

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US4869667A (en) * 1987-05-18 1989-09-26 Vardimon Alexander D Hygienic magnetic eruptor
US5063082A (en) * 1988-06-03 1991-11-05 Loren Adell Method of making coated metallic orthodontic arch wire
JP2004236772A (en) * 2003-02-04 2004-08-26 Tomii Kk Implement for correction of dentition and manufacturing method for the same
JP2005323694A (en) * 2004-05-12 2005-11-24 Hiroshima Univ Dental article and its production method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014093987A1 (en) * 2012-12-14 2014-06-19 Park Istre Ii, Llc Methods for making colored dental parts
EP2990006A4 (en) * 2013-04-27 2016-11-23 Danybmt Co Ltd Method for manufacturing coating wire for correcting teeth arrangement
US10543061B2 (en) 2014-10-03 2020-01-28 3M Innovative Properties Company Methods for managing the scattering of incident light and articles created therefrom
WO2020065538A1 (en) 2018-09-26 2020-04-02 3M Innovative Properties Company Parylene dental articles
EP3856072A4 (en) * 2018-09-26 2022-06-15 3M Innovative Properties Company Parylene dental articles
CN112472096A (en) * 2020-12-11 2021-03-12 西北工业大学 Stress-induced self-curling reticular cuff nerve electrode and preparation method thereof
CN112472096B (en) * 2020-12-11 2024-03-19 西北工业大学 Stress-induced self-curling reticular kappa neural electrode and preparation method thereof

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