US20140050888A1 - Coating for a medical, dental or surgical instrument - Google Patents

Coating for a medical, dental or surgical instrument Download PDF

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Publication number
US20140050888A1
US20140050888A1 US13/762,233 US201313762233A US2014050888A1 US 20140050888 A1 US20140050888 A1 US 20140050888A1 US 201313762233 A US201313762233 A US 201313762233A US 2014050888 A1 US2014050888 A1 US 2014050888A1
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US
United States
Prior art keywords
substrate
glass
dental
medical
ceramic layer
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US13/762,233
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English (en)
Inventor
Beate Wagner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
W&H Dentalwerk Buermoos GmbH
Original Assignee
W&H Dentalwerk Buermoos GmbH
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
Application filed by W&H Dentalwerk Buermoos GmbH filed Critical W&H Dentalwerk Buermoos GmbH
Assigned to W&H DENTALWERK BURMOOS GMBH reassignment W&H DENTALWERK BURMOOS GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WAGNER, BEATE
Publication of US20140050888A1 publication Critical patent/US20140050888A1/en
Priority to US15/018,276 priority Critical patent/US10287674B2/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/40—Oxides
    • C23C16/401—Oxides containing silicon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/02—Pretreatment of the material to be coated
    • C23C16/0272—Deposition of sub-layers, e.g. to promote the adhesion of the main coating
    • C23C16/0281—Deposition of sub-layers, e.g. to promote the adhesion of the main coating of metallic sub-layers
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
    • C23C16/52—Controlling or regulating the coating process
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/0042—Surgical instruments, devices or methods, e.g. tourniquets with special provisions for gripping
    • A61B2017/00429—Surgical instruments, devices or methods, e.g. tourniquets with special provisions for gripping with a roughened portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00526—Methods of manufacturing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00831—Material properties
    • A61B2017/0088—Material properties ceramic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/16—Protecting caps for hand-pieces or angle-pieces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24364—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] with transparent or protective coating

Definitions

  • This application relates a medical, dental or surgical instrument with a layer applied to or deposited over at least a part thereof and a method for producing a medical, dental or surgical instrument having such a layer.
  • US Patent Application US 2004/0091750 A1 discloses a medical instrument whose surface is coated with a plastic, in particular Teflon for repelling dirt.
  • the plastic layer is of such a type that the roughness of the surface is preserved so that a user can hold the medical instrument securely.
  • Teflon coating two desired, often mutually exclusive properties of a surface of a medical instrument are to be implemented by this Teflon coating, namely repelling dirt from the surface and a secure hold on the instrument by the user.
  • a medical instrument whose surface is provided with a plastic layer, in particular a Teflon layer consists of the fact that the plastic layer or the Teflon layer is very sensitive to mechanical effects. In practice this means that the plastic or Teflon layer of the medical instrument is damaged after just a short period of time, for example, due to abrasion or due to contact with other instruments and their efficacy is reduced or lost.
  • a surface of a medical instrument in particular a dental or surgical instrument or instrument part or a coating for a surface of a medical instrument, in particular a dental or surgical instrument or instrument part, which is less sensitive to mechanical influences while retaining the two desired properties mentioned above, i.e., repelling dirt from the surface and allowing the user to achieve a secure, tight hold on the instrument.
  • the medical, dental or surgical instrument comprises a substrate on at least part of the instrument having a rough surface structure and a layer which is applied to the substrate or deposited thereon in such a way that the rough surface structure of the substrate is not completely smoothed by the layer or the roughness is increased, wherein the layer applied to or deposited on the substrate is designed as a glass-ceramic layer.
  • the glass-ceramic layer or glass-ceramic substance is preferably understood to be a mixture or a composite material of amorphous glass or an amorphous glass-like matrix and polymerized, preferably organic, components contained therein.
  • the glass-ceramic layer or glass-ceramic substance preferably has an amorphous layer structure.
  • the glass-ceramic layer applied to or deposited on the substrate contains silicon, in particular silicon oxide and/or at least one (plasma) polymerized silicon compound, preferably one that is at least partially organic.
  • the glass-ceramic layer or glass-ceramic substance comprises a mixed structure of silicon dioxide and/or amorphous quartz-like layers with organic plasma-polymerized components incorporated into them.
  • a glass-ceramic substance or layer for coating a surface of a medical instrument in particular a dental or surgical instrument or instrument part has the following advantages:
  • the glass-ceramic layer is applied to or deposited on the substrate in such a thin layer that the roughness of the substrate is at least not completely smoothed out, but preferably is essentially preserved or is even slightly increased.
  • the glass-ceramic layer follows or corresponds essentially to the surface structure of the substrate, in particular without smoothing out recesses or substantially or completely filling them out.
  • the layer thickness of the glass-ceramic layer applied to or deposited on the substrate is preferably approximately 1 to approximately 8 ⁇ m, in particular about 3 to about 8 ⁇ m on exterior parts of instruments, for example, an outer sleeve, and about 1 to about 5 ⁇ m on the internal parts of instruments, for example, a tool holding device or a shaft.
  • the glass-ceramic layer is preferably applied to or deposited on the substrate such that it is preferably essentially closed or pore-free and thus has a dirt-repellent property and a high barrier property, in particular with respect to gas and water vapor diffusion.
  • the glass-ceramic layer, in particular the surface of the glass-ceramic layer is preferably modified so that the glass-ceramic layer, in particular its surface, receives hydrophobic surface properties. The modification is made, for example, by adjusting or controlling the oxygen content during the coating process (see below).
  • the hydrophobic surface property additionally increases the dirt-repellent properties of the glass-ceramic layer. If desired, it is also possible to modify the glass-ceramic layer, in particular its surface, so that it has hydrophilic surface properties.
  • the glass-ceramic layer is mechanically much stronger in comparison with the Teflon coating known from the prior art and is thus much more resistant to abrasion and contact with sharp edges or cutting edges, for example, other medical instruments.
  • the hardness or mechanical strength of the glass-ceramic layer is about 600 to about 800 HV, preferably approximately 700 HV, for example.
  • the glass-ceramic layer is preferably essentially chemically inert.
  • the glass-ceramic layer is thus essentially also corrosion-resistant, in particular resistant to corrosive cleaning media and water vapor.
  • the glass-ceramic layer is preferably designed so that it withstands temperature changes of approximately 100° C.-200° C. so that preferably it can be exposed with no problem to known cleaning or sterilization processes having such temperature changes, in particular at least several hundred times.
  • the glass-ceramic layer in particular has a very low thermal expansion coefficient in different temperature ranges so that breakage due to thermal shock is thereby prevented.
  • the thermal expansion coefficient is at least 0.55 ⁇ 10 ⁇ 6 K ⁇ 1 , for example.
  • the applied or deposited glass-ceramic layer is transparent. It is thus possible in an advantageous manner to shape geometric and/or alphanumeric structures or shapes, for example, edges, knurls, characters, numerals, trademarks, logos, instructions for use or warnings on the instrument or on the instrument part so that these structures or shapes are discernible or visible for the user due to the transparency of the glass-ceramic layer.
  • the glass-ceramic layer optionally on a substrate formed by a metal, in particular a substrate of steel or brass or on a substrate formed by a plastic.
  • an intermediate layer or an adhesion promoting layer for example, a metal alloy, preferably a nickel-chromium layer is provided between the substrate or the surface of the instrument or the instrument part and the glass-ceramic layer.
  • the glass-ceramic layer is applied or deposited directly (i.e., without an adhesion promoting layer or intermediate layer) on the substrate or the surface of the instrument or the instrument part.
  • the glass-ceramic layer is preferably deposited or applied on the substrate or the surface by a CVD (chemical vapor-deposition) method forming a plasma.
  • CVD chemical vapor-deposition
  • the gas and/or the components contained in the gas which are to be deposited are converted to the plasma state with the help of a high-frequency voltage.
  • the gas or the components to be deposited are in a very high energy level in the plasma state and then are deposited on the substrate or the surface. It is possible to achieve the deposition of a glass-ceramic layer through a suitable choice of process parameters of the method, for example, the magnitude or duration of the energy input to form the plasma, the gas pressure or the oxygen content in the plasma gas.
  • the gas contains in particular organosilicon compounds or silane gas and the oxygen content in the plasma gas is selected so that the oxygen is not sufficient to convert the organosilicon compounds or silane gas (completely) to silicon dioxide, carbon dioxide and water, thus forming the glass-ceramic layer in particular with its amorphous quartz-like structure with incorporated organic plasma-polymerized components.
  • the plasma-supported CVD process preferably at least the quantitatively excessive formation of crystals in particular of silicon dioxide is prevented by the plasma-supported CVD process, in particular due to the (low or substoichiometric) oxygen concentration and the formation or deposition of a glass-ceramic layer which is closed in particular or is continuous is made possible only in this way.
  • An instrument or an instrument part which is provided with the glass-ceramic layer may be embodied, for example, as a handheld element, a handle, a handpiece, a contra-angle handpiece, an adaptor, a drive unit, a coupling device, an air motor or electric motor or as a part thereof.
  • the instrument or instrument part may of course have various shapes, for example, straight, curved, angled or pistol shaped and it may be in one or more parts and may also be designed to dispense and/or receive and/or relay mechanical and/or electrical energy and/or at least one fluid.
  • the medical instrument in particular the dental or surgical instrument or instrument part which is provided with the glass-ceramic layer comprises a media-dispensing device for dispensing a medium in the direction of a treatment site, in particular for dispensing a fluid and/or electromagnetic energy and/or a tool mount for a tool that acts on a treatment site and can be set in motion by an (electrical or fluid-operated) drive device.
  • a media-dispensing device for dispensing a medium in the direction of a treatment site, in particular for dispensing a fluid and/or electromagnetic energy and/or a tool mount for a tool that acts on a treatment site and can be set in motion by an (electrical or fluid-operated) drive device.
  • the instrument or instrument part which is provided with the glass-ceramic layer is designed as an active mechanical instrument or instrument part, i.e., as a medical instrument or instrument part, the operation of which must rely at least partially on an electrical energy source or on any energy source other than the energy generated directly by the human body or by the force of gravity, for example, on an energy source which provides fluid, in particular compressed air.
  • the surface or substrate having a glass-ceramic layer comprises not only surfaces or substrates on the outside, on the outer shell or on the outside circumference of a medical instrument or instrument part, but of may course also include surfaces or substrates in the interior of such an instrument or instrument part or surfaces or substrates on coupling faces, joining faces, interfaces or contact faces of a medical instrument or instrument part.
  • Components with a glass-ceramic layer arranged in the interior of a medical instrument or instrument part may comprise, for example, at least parts of a shaft, a tool-holding device, a bearing or a media line or a fluid line, which should be dirt-repellent or corrosion-resistant in particular.
  • a method for producing a medical instrument, in particular a dental or surgical instrument or instrument part, preferably an active medical, in particular dental or surgical instrument or instrument part is defined in that a glass-ceramic layer is applied to or deposited on at least one component of the instrument or instrument part which has a substrate with a rough surface structure so that the rough surface structure of the substrate is at least not completely smoothed by the glass-ceramic layer so that the rough surface structure of the substrate develops at least partially into the applied or deposited glass-ceramic layer or the roughness of the surface structure is increased.
  • the glass-ceramic layer deposited on or applied to the substrate by the production method defined above preferably contains silicon, in particular silicon oxide and/or at least a (plasma-)polymerized, preferably at least partially organic silicon compound.
  • the glass-ceramic layer applied to or deposited on the substrate by the production process defined above is preferably transparent and/or has a hydrophobic surface property.
  • an alphanumeric structure or shape for example, a character, a numeral, a trademark, a logo, an instruction for use or a warning is formed on the instrument or on the instrument part or on the substrate.
  • the glass-ceramic layer applied to or deposited on the substrate is preferably deposited on the surface or on the substrate by a CVD (chemical vapor-deposition) process forming a plasma.
  • CVD chemical vapor-deposition
  • FIGS. 1-4 show four embodiments of medical instruments, in particular dental or surgical instruments or instrument parts having at least one surface with a glass ceramic layer.
  • FIG. 5 shows a first embodiment of a glass-ceramic layer of a medical instrument, in particular a dental or surgical instrument or instrument part.
  • FIG. 6 shows a second embodiment of a glass-ceramic layer of a medical instrument, in particular a dental or surgical instrument or instrument part.
  • FIG. 1 shows a first embodiment of a medical, dental or surgical instrument 2 (or part thereof) in the form of a handle element, in particular a curved or contra-angled handpiece 13 .
  • FIG. 2 shows a second embodiment of an instrument in the form of a handle element, in particular a straight handpiece 17 , preferably for removing dental calculus. Due to their great number of identical or similar components the two handle elements 13 , 17 will be described jointly in the following.
  • the instruments 2 comprise a head part 14 A, 18 A, preferably a neck part 14 B connected to the former and a main part 14 C, 18 C connected thereto.
  • the main part 14 C of the angle piece 13 is arranged at an angle to the neckpiece 14 B, whereas the two parts 18 A, 18 C of the handpiece 17 are arranged in a straight line, i.e., essentially along a shared central axis.
  • the parts 14 A- 14 C and 18 A, 18 C have a one-piece or multi-piece outer shell 10 .
  • a tool mount or tool holding device 8 A, 8 B preferably detachable, for receiving or holding a treatment tool 9 is provided in or on the head part 14 A, 18 A.
  • the tool mount 8 A, 8 B and the treatment tool 9 can preferably be induced to an operating motion, for example, a rotational motion, a lifting motion, a reciprocating motion or a vibrating motion.
  • the tool mount 8 A, 8 B is designed as a friction-locking or positive connecting device or as a screw connection, for example.
  • a first media-dispensing device 7 for dispensing at least one medium, in particular air and/or water is preferably provided on the head part 14 A, 18 A of the instrument 2 , in particular adjacent the tool mount 8 A, 8 B or around the tool mount 8 A, 8 B and/or around a tool receptacle 15 of the outer sleeve 10 , alternatively on the neck part 14 B.
  • the first media-dispensing device 7 comprises, for example, one or more lines, openings and/or nozzles from which a medium can be dispensed in the direction of the treatment site and/or the tool or an opening for connection to a fluid bore in the tool 9 .
  • a media dispensing device in the form of a light-dispensing device 6 for dispensing light in the direction of the treatment site for example, an optical fiber and/or a light source, preferably a light-emitting diode LED is provided on the head part 14 A, 18 A, in particular around the tool mount 8 A, 8 B and/or the tool receptacle opening 15 of the outer sleeve 10 , alternatively on the neck part 14 B.
  • the instruments 2 in particular the contra-angle handpiece 13 , preferably additionally comprise a tool release device for releasing the tool out of the tool mount 8 A.
  • the tool-releasing device is operable, for example, by means of an operating element 16 which is accessible from the outside for the user, in particular by means of a pushbutton or a key.
  • the operating element 16 is preferably provided on the head part 14 A, preferably substantially opposite the tool receptacle opening 15 .
  • the tool mount 8 A, 8 B and the treatment tool 9 can optionally be set in motion by means of a drive device provided in the instruments 2 or by means of a separate drive unit which is detachable from the instruments 2 .
  • the drive device provided in the instruments 2 comprises, for example, a rotary part that can be driven by a fluid, in particular by compressed air, in particular a turbine, a flywheel or a rotary sleeve rotatably arranged in the head part 14 A or an electrically operable drive device, for example, an electric motor or a piezoelectric drive or a magnetostrictive drive.
  • the separate drive unit that can be detached from the instruments 2 comprises, for example, a motor unit, e.g., an electric motor or a vane motor or an air motor (see FIG. 3 ).
  • a connecting or coupling device 11 is provided on the main part 14 C, 18 C for detachable connection or coupling of the instruments 2 to the releasable separate drive unit and/or to a control or regulating unit.
  • the connecting device 11 comprises a contact face 11 A which contacts a mating contact face of the releasable separate drive unit when the instruments 2 are connected to the drive unit and/or of a control or regulating unit and is exposed when the instruments 2 are separated from the drive unit and/or from the control or regulating unit.
  • the connecting device 11 is designed, for example, as a plug connection, screw connection, bayonet connection or as a rotary coupling.
  • the connecting device 11 is preferably designed for transmitting at least one medium and/or data, for example, for conveying a fluid, in particular water or air, electromagnetic radiation, electricity and/or electrical signals.
  • a fluid in particular water or air, electromagnetic radiation, electricity and/or electrical signals.
  • one or more electric lines, fluid lines, electric contacts, optical conductors and/or electric, optical or fluid connecting elements are provided on the connecting device 11 and of course also similarly on the releasable separate drive unit and/or control unit or regulating unit.
  • Components for transferring a drive motion and/or for conducting a medium and/or data and/or electrical signals are preferably provided in the neck part 14 B and/or in the main part 14 C, 18 C, for example, one or more shafts that can be set in motion, a vibrating shaft, a gear, one or more lines or channels for a fluid, an optical fiber or electrical lines for the transmission of electrical signals or data.
  • FIG. 3 shows a medical instrument, in particular a dental or surgical instrument or instrument part 2 in the form of a drive unit 19 for generating a drive motion.
  • the drive unit 19 is embodied in particular as a motor unit, preferably as an electric motor or a vane motor or an air motor.
  • FIG. 4 shows a medical instrument, in particular a dental or surgical instrument or instrument part 2 in the form of an adaptor or a coupling 23 . Because of the numerous similar or identical components, the two instruments 2 , i.e., the drive unit 19 and the coupling 23 are described jointly below.
  • the two instruments 2 each include a one-part or multi-part outer sleeve 10 .
  • the instruments 2 and/or their outer sleeves 10 have a main part 20 C, 24 C and a connecting part 20 A, 24 A, preferably in the form of a coupling device 12 , which is connected to the main part 20 C, 24 C.
  • the instruments 2 can be connected to a tool by means of the connecting part 20 A, 24 A so that the drive motion generated by the drive unit 19 and/or at least one medium, in particular a fluid and/or electromagnetic radiation can be transferred to the tool.
  • the connecting part 20 A, 24 A is designed, for example, as a plug connection, a screw connection, a bayonet connection or a rotary coupling.
  • the coupling device 12 comprises, for example, a coupling pipe or a coupling journal 21 and a contact or coupling face 12 A.
  • the coupling face 12 A is designed to contact a mating contact face of an instrument that can be detachably connected to the drive unit 19 or the coupling/adaptor 23 , for example, the mating contact face 11 A of the handpiece 13 when the drive unit 19 or the coupling/the adaptor 23 is connected to the instrument.
  • the coupling face 12 A is exposed when the instrument is detached from the drive unit 19 or the coupling/adaptor 23 .
  • the motor or at least a large portion of the motor components is arranged in the main part 20 C of the drive unit 19 , for example, the rotor, the stator, a control or regulating element for the motor, electric or fluid supply lines for driving and/or cooling the motor, one or more sensors for monitoring the operation of the motor, a rotor shaft, etc.
  • an electrodynamic converter generator
  • a shaft for example, at least a part of the rotor shaft or a shaft connected to the rotor shaft and/or an entraining element for transferring or relaying a drive motion, in particular the drive motion generated by the drive unit 19 is arranged in the coupling journal 21 , in particular in the coupling journal 21 of the drive unit 19 .
  • a connecting device 22 for connection of the instruments 2 to a supply and/or control or regulating unit is provided.
  • the supply and/or control or regulating unit supplies the drive unit 19 , in particular its motor or the coupling/adaptor 23 , in particular its generator with a drive medium, for example, and/or a cooling medium and/or electrical signals and/or it preferably receives at least one electrical signal or data from the drive unit 19 or the coupling/adaptor 23 .
  • the connecting device 22 accordingly preferably comprises one or more media transfer elements, for example, electric lines for power supply and/or for data exchange, fluid lines 25 , optical conductors, electric contacts and/or electric, optical or fluid connecting elements.
  • the drive unit 19 and the coupling/adaptor 23 are therefore preferably designed to transmit at least one medium, for example, a fluid, in particular water or compressed air, electrical energy, an electric signal or electromagnetic radiation, in particular light to a tool or instrument connected or connectable to the drive unit 19 or the coupling/adaptor 23 , for example, a handpiece 13 or from a tool or instrument, for example, a handpiece 13 which is or can be connected to the drive unit 19 or to the coupling/adaptor 23 .
  • a fluid in particular water or compressed air
  • electrical energy an electric signal or electromagnetic radiation, in particular light
  • an electric signal or electromagnetic radiation in particular light
  • one or more media transfer elements are preferably provided, for example, electric lines, fluid lines, optical conductors, electric contacts and/or electric, optical or fluid connecting elements are preferably provided on the connecting part 20 A, 24 A, in particular on the coupling face 12 A and/or on the coupling journal 21 .
  • the media transfer elements of the connecting part 20 A, 24 A they are connected to the media transfer elements of the connecting device 22 via the drive unit 19 or the coupling/adaptor 23 via electrical, optical and/or fluid lines passing through the drive unit 19 or the coupling/adaptor 23 .
  • At least one component or one surface 1 A, 1 B of a component of the instruments 2 , 13 , 17 , 19 , 23 described above from FIGS. 1-4 is provided with a glass-ceramic layer 5 , for example, at least a part of the outer sleeve 10 and/or of the connection device 11 , in particular its contact face 11 A and/or of the coupling device 12 , in particular its contact face 12 A and/or of the operating element 16 and/or of the tool mount or tool holding device 8 A, 8 B is/are provided with the layer.
  • FIGS. 5 and 6 show two embodiments of such a glass-ceramic layer 5 which may optionally be applied to or deposited on a surface 1 A, 1 B of at least one component of the instruments 2 , 13 , 17 , 19 , 23 of FIGS. 1-4 as described above.
  • the surface 1 A according to FIG. 5 comprises a substrate, for example, a metal or a plastic.
  • the substrate is formed, for example, by the outer sleeve 10 or its outermost layer. However the substrate may of course also comprise any other component of the instrument 2 .
  • the substrate 3 has a rough surface or surface structure 4 which is represented in FIG. 5 by the zigzag pattern of the surface of the substrate 3 resembling mountains and valleys.
  • An intermediate layer or an adhesion-promoting layer 26 is provided on the substrate 3 .
  • the intermediate layer 26 according to one embodiment comprises a metallic layer, for example, a metal alloy, in particular a nickel chromium layer.
  • the intermediate layer 26 preferably has a thickness of approximately about 2 ⁇ m to about 5 ⁇ m.
  • the glass-ceramic layer 5 is arranged on the intermediate layer 26 .
  • the glass-ceramic layer 5 just like the intermediate layer 26 essentially follows the rough surface or surface structure 4 of the substrate 3 .
  • the rough surface structure 4 of the substrate 3 is thus at least not completely smoothed by the glass-ceramic layer 5 , so that a secure hold with the least slippage possible of the instrument or instrument part 2 and with the most secure possible hold for the user is provided.
  • FIG. 5 also shows that the glass-ceramic layer 5 is applied to or deposited on the substrate 3 or the intermediate layer 6 in an essentially homogeneous or uniform manner, so there is a dense uniform pore-free surface coating which is thus also dirt-repellent.
  • the glass-ceramic layer 5 for example, has a thickness of approximately 1 ⁇ m to approximately 8 ⁇ m, preferably a thickness of approximately about 3.5 ⁇ m to about 6 ⁇ m, in particular a thickness of approximately 4 ⁇ m.
  • the glass-ceramic layer 5 comprises a mixture of amorphous glass or of an amorphous glass-like matrix and (plasma) polymerized, preferably organic components contained therein
  • the glass-ceramic layer 5 contains silicon, in particular silicon oxide/silicon dioxide and/or at least one (plasma-)polymerized, preferably at least partially organic silicon compound.
  • the surface 1 B shown in FIG. 6 corresponds in its structure and properties essentially to the surface 1 A of FIG. 5 , so that reference is made to the description in this regard to avoid repetition. However, in contrast with the surface 1 A, the surface 1 B does not have an intermediate layer 26 .
  • the glass-ceramic layer 5 is arranged directly on the substrate 3 , i.e., for example, on the outer sleeve 10 of the instrument 2 . Direct application or deposition of the glass-ceramic layer 5 without the intermediate layer is possible with a metallic substrate as well as with a substrate made of plastic.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Epidemiology (AREA)
  • Dentistry (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Inorganic Chemistry (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Surgical Instruments (AREA)
US13/762,233 2012-02-10 2013-02-07 Coating for a medical, dental or surgical instrument Abandoned US20140050888A1 (en)

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EP12154820.0A EP2626010B1 (de) 2012-02-10 2012-02-10 Medizinisches, insbesondere dentales oder chirurgisches, Instrument mit Beschichtung
EP12154820.0 2012-02-10

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Cited By (1)

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CN107771063A (zh) * 2015-06-19 2018-03-06 柯惠Lp公司 机器人外科手术组件

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WO2015059257A1 (de) * 2013-10-24 2015-04-30 W & H Dentalwerk Bürmoos GmbH Beschichtung für ein medizinisches, dentales oder chirurgisches instrument
FR3079407B1 (fr) * 2018-03-30 2022-06-10 Apollina Dispositif electronique dentaire d'application universelle

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Also Published As

Publication number Publication date
CA2802474A1 (en) 2013-08-10
JP2013163020A (ja) 2013-08-22
EP2626010A1 (de) 2013-08-14
US20160168695A1 (en) 2016-06-16
CA2802474C (en) 2016-02-23
JP2016028738A (ja) 2016-03-03
JP6195883B2 (ja) 2017-09-13
EP2626010B1 (de) 2015-08-26
US10287674B2 (en) 2019-05-14

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