WO2006019225A1 - Implant dentaire, transfert d'empreinte et analogue de laboratoire pour l'implant dentaire - Google Patents

Implant dentaire, transfert d'empreinte et analogue de laboratoire pour l'implant dentaire Download PDF

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Publication number
WO2006019225A1
WO2006019225A1 PCT/KR2005/002162 KR2005002162W WO2006019225A1 WO 2006019225 A1 WO2006019225 A1 WO 2006019225A1 KR 2005002162 W KR2005002162 W KR 2005002162W WO 2006019225 A1 WO2006019225 A1 WO 2006019225A1
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WO
WIPO (PCT)
Prior art keywords
joining
external
fixture
projection
internal
Prior art date
Application number
PCT/KR2005/002162
Other languages
English (en)
Inventor
Dal Ho Lee
Original Assignee
Dal Ho Lee
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 KR1020040065731A external-priority patent/KR100597392B1/ko
Priority claimed from KR1020040074573A external-priority patent/KR100597394B1/ko
Application filed by Dal Ho Lee filed Critical Dal Ho Lee
Publication of WO2006019225A1 publication Critical patent/WO2006019225A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0066—Connecting devices for joining an upper structure with an implant member, e.g. spacers with positioning means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0054—Connecting devices for joining an upper structure with an implant member, e.g. spacers having a cylindrical implant connecting part
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0069—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/006—Connecting devices for joining an upper structure with an implant member, e.g. spacers with polygonal positional means, e.g. hexagonal or octagonal

Definitions

  • the present invention relates to an implant, and more particularly, to a dental implant and an impression coping and lab analog for manufacturing prostheses used in dental implants, which can securely fasten an abutment or a transmucosal abutment and be compatible with other abutments.
  • a dental implant indicates an artificial tooth structure formed by a process in which a fixture, an artificial dental root, is implanted in a part where a tooth is partially or entirely lost to be adhered to an alveolar bone, and a tooth prosthesis is fixed to the artificial dental root.
  • a word of "implant” may be used as an inclusive concept including a method of performing a dental procedure, in wide sense, or may be used as the same meaning of a fixture, in narrow sense.
  • An implant in the present specification may be used as a general artificial tooth structure.
  • an implant is usually composed of a fixture of titanium, an abutment fixed on the fixture, an abutment screw fixing the abutment on to the fixture, and a crown which is an artificial tooth fixed on the abutment.
  • An implant may be performed only at a lost portion with no injury of other portions or teeth adjacent to a lost tooth, may support osseous tissue to delay absorption speed of the osseous tissue, may provide masticatory force the same as a natural tooth, and aesthetically formed approximately as the same as a natural tooth in appearance. Accordingly, implants are currently widely used as a method of performing dental procedure for repairing injured or lost teeth.
  • Implants described above may be classified into external connection-type implants (hereinafter, referred to as external implants) and internal connection-type implants (hereinafter, referred to as internal implants).
  • An external implant includes a fixture, an abutment, and a crown.
  • connection projection is formed on the top surface of the fixture, and a connection recess is formed around the bottom of the abutment in order to fit the connection projection.
  • the connection projection and the connection recess are formed in a circular or non-circular shape, and a screw hole for an abutment screw is formed in the center.
  • connection projections and connection recesses formed in the non-circular shape such as a hexagonal or octagonal shape are used
  • the connection projections may prevent relative rotation between a fixture and an abutment and assist to easily fit direction when positioning the abutment on to the fixture.
  • the use of implants began with external implants. Since various designs of implants and a lot of clinical results according to the designs of the implants are available, external implants are most generally used.
  • FIG. 1 is a cross-sectional view illustrating a conventional external implant.
  • an implant 10 using an UCLA abutment is made by a screw-retained prosthesis.
  • the implant 10 includes a fixture 12, an abutment 14, and a crown 18.
  • the fixture 12 is implanted in an alveolar bone, and the abutment 14 is formed in a single body with the crown 18 and fixed on the fixture 12.
  • An external connection projection 13 is formed on the fixture 12.
  • the external connection projection 13 is formed in a shape of a hexagonal prism, and a screw hole is provided in the center of the external connection projection 13.
  • an external connection recess 15 is provided around the bottom of the abutment in response to the external connection projection 13. Since the external connection recess 15 is formed in a hexagonal prism shape according to the external connection projection 13, the external connection recess 15 snuggly fits the external connection projection 13.
  • the abutment 14 and the crown 18 are adhered in a single body, and a screw 16 is engaged with the fixture 12 through a hole penetrating the center of the abutment 14 and the crown 18.
  • the screw 16 is engaged with the fixture 12 through a hole penetrating the center of the abutment 14 and the crown 18.
  • FIG. 2 is a cross-sectional view illustrating another conventional external implant.
  • an implant 20 is one of external implants, which uses a transmucosal abutment 24.
  • the implant 20 of FIG. 2 includes a fixture 22, a transmucosal abutment 24, an upper abutment 26, and a crown 28.
  • the upper abutment 26 is coupled with the crown 28 and disposed on the transmucosal abutment 24.
  • the transmucosal abutment 24 includes a hole in response to a first screw 24-1, and the first screw 24-1 is engaged with the fixture 22 via the transmucosal abutment 24, thereby fixing the transmucosal abutment 24 on the fixture 22.
  • a second screw 26-1 is inserted through a hole penetrating the crown 28 and the upper abutment 26 and bonded to a screw hole formed above the first screw 24-1, thereby fixing the crown 28 and the upper abutment 26 on the transmucosal abutment 24.
  • a connection recess 27 in response to the head of the first screw 24-1 is formed around the bottom of the upper abutment 26.
  • an external connection projection formed on a fixture and an external connection recess formed around the bottom of an abutment are mutually adhered to mutually bond the abutment to the fixture.
  • external implants are manufactured according to Branemark method, 3i method, etc., and connection projections and connection holes are in a shape of straight hexagonal prism and have a height of approximately 0.7mm and a width of approximately 2.7mm.
  • connection projection Since the height of a connection projection is small, an external connection projection may be quickly worn or the connection between the external connection projection and an external connection recess is loosened, which may cause an abutment to be easily extracted.
  • a connection projection has been manufactured to have a height of lmm or more, and a connection projection has been manufactured in a shape of an octagonal prism or spline, but the problem still is not overcome.
  • the methods described above are incompatible with each other, a lot of dentists shun these methods. In addition, loosening or breaking of a screw frequently occurs.
  • An internal implant includes a fixture, an abutment, and a crown.
  • a connection recess is formed on the fixture instead of a connection projection, and a connection projection is formed around the bottom of the abutment in response to the connection recess.
  • the described above is an exact opposite construction as compared to external implants. Since a long space if formed above the fixture, an area for contacting the fixture and abutment may be widely formed.
  • the connection projection and the connection recess are formed in a circular or non-circular shape, and a hole for an abutment screw is formed in the center.
  • the internal implant is for overcoming the shortcomings of the external implant and has an advantage of stably supporting the abutment using a relatively wide area.
  • FIG. 3 is a cross-sectional view illustrating a conventional internal implant. Two types of internal implants are indicated respectively as (a) and (b) in FIG. 3.
  • an internal implant includes a fixture 42, an internal abutment 44, a screw 46, and a crown 48.
  • the fixture 42 includes a connection recess formed on the upper end portion, and the abutment 44 includes a connection projection 45 in response to the connection recess.
  • the connection projection 45 is formed around the bottom of the abutment 44, and a top supporting surface is formed on the top in order to contact and support the crown 48.
  • connection recess of the fixture 42 includes a recess located in the entry and formed in a conical shape and a recess formed in a shape of a hexagonal or octagonal prism.
  • the connection projection 45 of the abutment 44 includes a fitted portion 45a formed in a shape of a cone and an anti-rotation portion 45b formed in a shape of a hexagonal or octagonal prism in response to the shapes of the connection recess.
  • an internal implant includes a fixture 52, an internal abutment 54, a screw 56, and a crown 58.
  • the fixture 52 includes a connection recess on the top, and a connection projection 55 is provided around the bottom of the abutment 54 in response to the connection recess.
  • connection recess of the conventional fixture 52 is formed in a shape of a prism having a cross section of a round or a polygon
  • connection projection 44 of the abutment 54 is formed in a shape of a cylinder or a prism.
  • a connection projection formed in a shape of a cylinder is used, a projection or a groove may be formed in order to restrict rotation between the connection projection and the connection recess.
  • connection projection and connection recess are formed in a shape of a cylinder or a prism in structures of internal implants, they may make a wide contact area to be supported, loosening of a screw does not occur, and an implant is complete by performing almost one operation.
  • the abutment is certainly retreated in a direction of an axis and a distance to move in the direction of the axis is very long. Accordingly, internal implants are mainly used for repairing one tooth and there are many difficulties and limitations by applying a splint-type implant, in order to repair three or more adjacently injured teeth, thereby being scarcely used.
  • a dental implant system is disclosed in U.S. Patent No. 6,419,492.
  • the dental implant system also includes a fixture and an abutment.
  • the fixture of the dental implant system includes a head portion and a body portion, and the head portion includes a space including a tapered sidewall.
  • An anchoring post is projected from the bottom of the space of the head portion, and an indexing means is formed as an end portion of the anchoring post.
  • the abutment also includes first and second spaces provided on the top and bottom, and the abutment has a tapered shape in response to the tapered sidewall of the space formed in the head portion of the fixture. Accordingly, the first space located at the bottom containing the anchoring post, and the bottom of the abutment is adhered and fixed to the head portion of the fixture.
  • the anchoring post and indexing means of the fixture are formed in the center of the space of the head portion in order to prevent relative rotation of the abutment.
  • the fixture has a structure in which an anti-rotation portion is projected inside based on an internal connection method, which inverses the anti-rotation portion 45b of (a) of FIG. 3 to make the process difficult.
  • the shape and size are different from conventional abutment and fixture, it is impossible to be compatible with other products.
  • external implants are used world-wide as an elementary form. There are advantages in that manufacturing is relatively simple compared with other methods and the shape and size of the fixture and abutment are almost standardized, thereby having good compatibility.
  • the height of an external connection projection is low, approximately 0.7 to 1.0mm, a possibility that an abutment is separated from a fixture is higher than other methods and loosening of a screw relatively frequently occurs.
  • one goal of the present invention is to provide a fixture of a dental implant, which can solve the problems of the external joining method by adopting the merits of the internal joining method based on the external joining method.
  • Another goal of the present invention is to provide a fixture of a dental implant, which has a structure for using a conventional external joining type abutment.
  • Another goal of the present invention is to provide a dental implant including an abutment and fixture that includes the merits of both the external joining implant and the internal joining implant, and can overcome the disadvantages of both joining methods.
  • a dental implant includes a fixture and an abutment assembly.
  • the fixture includes a fixture body, a flange, an internal joining recess, and an external joining projection.
  • the external joining projection is formed in the shape of a cylinder, and a first screw hole is formed at a predetermined depth in the center of the joining projection.
  • the flange is disposed at the bottom of the external joining projection.
  • the fixture body is disposed at the bottom of the flange.
  • a tissue bonding portion is formed on the outer surface of the fixture body to be bonded to osseous tissues.
  • the flange includes the internal joining recess formed around the external joining projection.
  • One or more first unevenness(es) vertically oriented is/are formed on the outer surface of the external joining projection to prevent rotation.
  • the cylinder may indicate a column having a circular cross section, such as a straight cylinder and a tapered truncated cone.
  • the abutment assembly includes an external joining recess corresponding to the external joining projection, an internal joining projection corresponding to the internal joining recess, and a second screw hole corresponding to the first screw hole.
  • the external joining recess formed in the shape of a cylinder is formed at the bottom of the abutment.
  • the internal joining projection is formed around the external joining recess.
  • One or more second unevenness(es) corresponding to the first unevenness(es) is/are formed on the inner surface of the external joining recess. The first and second unevennesses are engaged with each other, thereby preventing rotation relative to the fixture and the abutment.
  • the fixture includes the external joining projection and the abutment includes the external joining recess corresponding to the external joining projection, thereby using a conventional external joining method. Also, the fixture includes the internal joining recess around the external joining projection and the abutment includes the internal joining projection, thereby connecting the fixture and abutment of the present invention by an internal joining method. Accordingly, since both joining methods are used, the abutment may be more securely fastened on the fixture.
  • the external joining projection can be corresponding to a conventional external joining type abutment
  • an abutment having no internal joining projection may be fastened to the fixture.
  • the fixture may use a tool or a kit used in the conventional external joining method in a process of performing the operation for an impression coping or other implants, there is no need to purchase additional tools or kits.
  • the first unevennesses may be formed on the side wall of the internal joining recess instead of the external joining projection, and the second unevennesses may be formed on the outer surface of the internal joining projection corresponding to the internal joining recess.
  • the first and second unevennesses are engaged with each other, thereby preventing relative rotation between the fixture and the abutment.
  • the internal joining projection and the internal joining recess are discontinuously formed at regular or irregular intervals, thereby preventing rotation between the fixture and the abutment.
  • the internal joining recess is regularly formed at the interval of an angle 120°, 90°, or 72° on the flange of the fixture and the abutment is also formed at the same interval of the angle, thereby preventing the rotation between the fixture and the abutment without unevenness.
  • FIG. 1 is a cross-sectional view illustrating a conventional external implant
  • FIG. 2 is a cross-sectional view illustrating another conventional external implant
  • FIG. 3 is a cross-sectional view illustrating a conventional internal implant
  • FIG. 4 is a perspective view illustrating a fixture of a dental implant according to a first embodiment of the present invention
  • FIG. 5 is a top view illustrating the fixture of the dental implant according to the first embodiment
  • FIG. 6 is an exploded front view illustrating the fixture and the implant according to the first embodiment
  • FIG. 7 is a cross-sectional view illustrating a state of engaging the implant according to the first embodiment
  • FIG. 8 are a top and a cross-sectional views of a fixture for illustrating a dental implant according to another embodiment of the present invention similar to the first embodiment;
  • FIG. 9 is an exploded front view illustrating a dental implant according to a second embodiment of the present invention.
  • FIG. 10 is an exploded perspective view illustrating a dental implant according to a third embodiment of the present invention.
  • FIG. 11 is a perspective view illustrating an impression coping according to a fourth embodiment of the present invention.
  • FIG. 12 is a perspective view illustrating a lab analog according to the fourth embodiment.
  • FIG. 13 is a partial cross-sectional view illustrating an example of bonding the impression coping to the lab analog, according to the fourth embodiment;
  • FIG. 14 is a perspective view illustrating a fixture of a dental implant according to a fifth embodiment of the present invention.
  • FIG. 15 is a top view illustrating the fixture of the dental implant according to the fifth embodiment of the present invention.
  • FIG. 16 is an exploded front view illustrating the fixture and the implant according to the fifth embodiment
  • FIG. 17 is a cross-sectional view illustrating an example of engaging the implant according to the fifth embodiment.
  • FIG. 18 is a cross-sectional view illustrating a process of closely attaching and separating a splinted dental prosthesis to/from a conventional fixture
  • FIG. 19 is a cross-sectional view illustrating a process of closely attaching and separating a splinted dental prosthesis to/from the fixture according to the fifth embodiment
  • FIG. 20 is an exploded front view illustrating a dental implant according to a sixth embodiment of the present invention
  • FIG. 21 is an exploded perspective view illustrating a dental implant according to a seventh embodiment of the present invention
  • FIG. 22 is a perspective view illustrating an impression coping according to an eighth embodiment of the present invention.
  • FIG. 23 is a perspective view illustrating a lab analog according to the eighth embodiment.
  • FIG. 24 is a partial cross-sectional view illustrating a state of bonding the impression coping with the lab analog according to the eighth embodiment. Best Mode for Carrying Out the Invention
  • Embodiment 1 is not defined or restricted by the following embodiments.
  • FIG. 4 is a perspective view illustrating a fixture of a dental implant according to a first embodiment of the present invention
  • FIG. 5 is a top view illustrating the fixture of the dental implant according to the first embodiment
  • FIG. 6 is an exploded front view illustrating the fixture and the implant according to the first embodiment
  • FIG. 7 is a cross-sectional view illustrating a state of engaging the implant according to the first embodiment.
  • an implant 100 includes a fixture 110 and an abutment 150.
  • the fixture 110 includes a fixture body 120, a flange 140, an internal joining recess 142, and an external joining projection 130.
  • the fixture body 120 is composed of titanium alloy, and a screw thread is formed on the outer surface of the body.
  • the fixture body 120 may penetrate osseous tissue and be bonded to the osseous tissue for a relatively long period of time after entering the osseous tissue.
  • the fixture body 120 is fixed with a maxillary bone as a single body and stably supports the prosthesis as an artificial dental root.
  • the screw thread may function as a tissue joining portion that forms a large bonding area for the osseous tissue in addition to enabling the fixture body 120 to easily enter the osseous tissue.
  • a plurality of recesses may be formed on an end portion together with the screw thread.
  • the surface may be processed to be porous on the fixture body 120
  • the area that may be bonded to the osseous tissue may be as enlarged as much as possible.
  • the surface is processed by acid erosion or apatite hydroxide, a peculiar porous surface structure such as a sintered surface that is different from other implant products whose surface is processed by acid erosion or apatite hydroxide coating, thereby enlarging the surface area to obtain a strong osseous adhesion, even though the quantity of bones is insufficient.
  • the flange 140 is placed on the fixture body 120, and the external joining projection 130 formed in the shape of a straight cylinder is provided above the flange
  • the flange 140 and the external joining projection 130 are formed as a single body with the fixture body 120 and the three elements are made of titanium alloy.
  • the external joining projection 130 is for bonding the abutment and formed in the shape of a cylinder, and a first screw hole 138 is formed to a predetermined depth in the center portion of the external joining projection 130.
  • the external joining projection 130 is for fastening an abutment bonded by an external joining method.
  • the first screw hole 138 may be extended to the fixture body 120 along the axis of the fixture 110, receiving a screw 160 penetrating the abutment 150, and the screw 160 can fasten a crown C and the abutment 150 to the fixture 110.
  • First unevennesses 132 vertically oriented is formed on the side wall of the external joining projection 130.
  • the first unevenness 132 is corresponding to second unevennesses 155 of the abutment 150.
  • the first and second unevennesses 132 and 155 are engaged with each other by a plane contact, thereby preventing the abutment 150 from relatively rotating on the fixture 110.
  • the first unevennesses 132 are concavely formed and in the height of the entire external joining projection 130, the kind of unevenness may be concavely or convexly formed according to the design purpose of a designer and the length of the unevenness may be controlled.
  • the kind and the length of unevenness of the following embodiment 2 are different from the present embodiment.
  • a circular internal joining recess 142 is formed around the external joining projection 130 on the flange 140.
  • the internal joining recess 142 has a width of approximately 0.2 to 0.5 mm and a depth of approximately 0.6 to 1.0 mm and is formed in a circle.
  • a supporting surface 144 having a predetermined width is formed between the top portion of the flange 140 and the internal joining recess 142.
  • the supporting surface 144 supports the bottom of the abutment 150, together with internal joining recess 142. If the abutment installed above the supporting surface 144 does not include an internal joining recess, the supporting surface 144 can support the bottom of the abutment.
  • a margin portion 146 is provided around the flange 140.
  • the margin portion 146 is formed on the top of the flange 140 whose size is determined, thereby preventing the collapse of osseous tissues around the fixture 110 and providing a sufficient sidewall to form the internal joining recess 142.
  • the abutment 150 is for a Screw-Cement Retained Prosthesis (SCRP) and includes an external joining recess 154 corresponding to the external joining projection
  • the second unevennesses 155 corresponding to the first unevennesses 132 are convexly formed on the inner wall of the external joining recess 154.
  • the external joining projection 130 is formed in the shape of a cylinder
  • the external joining recess 154 is also formed in the shape a cylinder with the same size.
  • an internal joining projection 152 is formed around the entrance of the external joining recess 154 on the bottom of the abutment 150.
  • the internal joining projection 152 is formed in the shape of a ring, corresponding to the internal joining recess 142, and projected from the bottom of the abutment 150.
  • a second screw hole 158 connected with the external joining recess 154 is formed in the center of the abutment 150, through which the screw 160 is fastened to the first screw hole 138 of the fixture 110 via the second screw hole 158.
  • the abutment 150 may be provided being engaged with the crown C and fastened to the fixture 110 by the screw 160.
  • only the abutment 150 is fastened to the fixture 110 by the screw 160 and the crown C may be fastened to the abutment 150 by using cement.
  • the height of the external joining projection 130 is approximately 0.7 mm and the depth of the internal joining recess 142 is approximately 0.8 mm, the joining length between the fixture 110 and the abutment 150 may be increased to more than twice a conventional length.
  • the sidewall of the internal joining recess 142 is formed vertical to the top of the flange 140, according to another embodiment of the present invention, at least one of sidewalls may be tapered to form a slope facing upward and the slope surface may allow an abutment to easily closely attach to and separate from a fixture.
  • FIG. 8 are a top and a cross-sectional views of a fixture for illustrating a dental implant according to another embodiment of the present invention similar to the first embodiment.
  • the internal joining recess 142 is a ring-shaped groove formed on the flange 140, and the outside of the external joining projection 130 and the inside of the internal joining recess 142 are common to be located on the same plane. Therefore the internal joining recess 142 may has a larger space around the external joining projection 130 rather than the internal joining recess in FIGS. 4 to 6.
  • a space for forming the internal joining recess 142 is provided and the inside of the internal joining recess 142 and the outside of the external joining projection 130 are formed in the same diameter, thereby easily manufacturing.
  • FIG. 9 is an exploded front view illustrating a dental implant according to a second embodiment of the present invention.
  • an implant 200 includes a fixture 210 and an abutment 250.
  • the fixture 210 includes a fixture body 220, a flange 240, an internal joining recess 242, and an external joining projection 230.
  • the abutment 250 includes an internal joining projection 252 and an external joining recess 254.
  • the fixture body 220 is composed of titanium alloy, and a screw thread is formed on the outer surface of the fixture body 220.
  • the fixture body 220 may penetrate osseous tissues by using the screw thread and be bonded to the osseous tissues for a relatively long period of time.
  • the screw thread enables the fixture body 220 to easily enter the osseous tissues and to form a wide contact area for the fixture body 220 to bond to the osseous tissue, which functions as a tissue bonding portion.
  • the flange 240 is provided above the fixture body 220, and the external joining projection 230 formed in the shape of a cylinder is provided above the flange 240.
  • the flange 240 and the external joining projection 230 are formed in a single body with the fixture body 220 and composed of titanium alloy.
  • the external joining projection 230 is for bonding an abutment and formed in the shape of a cylinder, and a first screw hole 238 is formed in the center portion at a predetermined depth.
  • the internal joining recess 242 formed in the shape of a circle is formed around the external joining projection 230 on the flange 240.
  • the internal joining recess 242 is formed at a width of approximately 0.2 to 0.5 mm and a depth of approximately 0.6 to 1.0 mm and formed in shape of a circle.
  • first unevennesses 243 vertically oriented are formed on the bottom of the inner wall of the internal joining recess 242.
  • the first unevennesses 243 are corresponding to second unevennesses 253 of the abutment 250.
  • the first and second unevennesses 243 and 253 are engaged with each other, thereby preventing relative rotation between the fixture 210 and the abutment 250.
  • unevennesses are formed on a portion attached by an internal joining method and formed on the bottom of the inner wall instead of being formed with respect to the entire height of the internal joining recess 243. This is for repressing the relative rotation between the fixture 210 and the abutment 250, and their length is sufficiently long enough so they may hook each other.
  • a supporting surface 244 having a predetermined width is formed between the top of the flange 240 and the internal joining recess 242.
  • a margin portion 246 is provided around the flange 240.
  • the margin portion 246 is formed on the side surface of the flange 240 to have a determined thickness, thereby preventing the collapse of osseous tissues around the fixture 210 and providing a sufficient sidewall that can form the internal joining recess 242.
  • minute rough surface 249 may be formed on the exterior of the margin portion 246.
  • the minute rough surface 249 forms a plurality of protruded lines along the circumference of the flange 240, may be easily bonded to peripheral gingival tissues, and may prevent the peripheral gingival tissues from being collapse after the passage of time.
  • the abutment 250 is a screw-retained type or a cement-retained type and includes the external joining recess 254 corresponding to the external joining projection 230 of the fixture 210.
  • the external joining recess 254 is formed in the shape of a cylinder with the same size of the external joining projection 230.
  • the internal joining projection 252 is formed around the entrance of the external joining recess 254 below the abutment 250.
  • the internal joining projection 252 is formed in the shape of a ring corresponding to the internal joining recess 242 and projected from the bottom of the abutment 250.
  • the second unevenness 253 corresponding to the first unevenness is concavely formed on the outer surface of the bottom of the internal joining projection 252.
  • the first and second unevennesses 243 and 253 are convexly or concavely formed, respectively. According to another embodiment of the present invention, first and second unevennesses may be concavely and convexly formed, similar to a CAMLOG system.
  • a second screw hole 258 connected to the external joining recess 254 is formed in the center of the abutment 250.
  • a screw 260 enters the first screw hole over the second screw hole 258 to be fastened to the fixture 210.
  • the abutment 250 is provided being bonded with the crown C and may be fastened to the fixture 210 by the screw 260.
  • only the abutment 250 is fastened to the fixture 210 by using the screw 260 and the crown C is fastened to the abutment 250 by using cement.
  • the combination length between the fixture 210 and the abutment 250 may be increased to more than twice a conventional length.
  • FIG. 10 is an exploded perspective view illustrating a dental implant according to a third embodiment of the present invention.
  • an implant 300 includes a fixture 310 and an abutment 350.
  • the fixture 310 includes a fixture body 320, a flange, an internal joining recess 342, and an external joining projection 330.
  • the abutment 350 includes an internal joining projection 352 and an external joining recess 354.
  • the dental implant 300 does not include unevenness formed on the joining projection and/or joining recess.
  • the internal joining projection 352 and the internal joining recess 342 are discontinuously formed, namely the internal joining projection 352 including projecting pieces and the internal joining recess 342 including separate grooves, thereby they preventing relative rotation between the fixture 310 and the abutment 350. Since the construction and material of the fixture and the material and basic functions of the abutment are similar to the previous embodiments, repetitious descriptions will be omitted.
  • the internal joining recess 342 is discontinuously formed on the flange 340. Since the internal joining recess 342 is regularly or irregularly formed instead of being continuously formed, the rotation between the fixture 310 and the abutment 350 may be prevented. Also, as the same as the case in which unevenness exists, the internal joining recess 343 is discontinuously formed, thereby easily defining the direction of the abutment.
  • FIG. 11 is a perspective view illustrating an impression coping according to a fourth embodiment of the present invention
  • FIG. 12 is a perspective view illustrating a lab analog according to the fourth embodiment.
  • impression coping and the lab analog shown in FIGS. 11 and 12 are for the fixture 110 and the abutment 150 described in the first embodiment and are used in manufacturing a prosthesis after the fixture 110 is implanted into an alveolar bone.
  • an impression coping is used for defining the location and direction of an implanted fixture in acquiring an impression and a material fixed to the fixture before the impression of a tooth is acquired by using impression material.
  • the lab analog is attached to the impression coping fastened to the impression material and fastens the acquired impression to a stone.
  • a stone model that is the same as the tooth and peripheral structure may be manufactured via the impression coping and the lab analog.
  • An accurate prosthesis may be manufactured via the stone model.
  • an impression coping 400 includes a coping body 410 and a coping bonding portion 420.
  • the coping body 410 is fastened on the fixture as an abutment and includes an external joining recess 414 and an internal joining projection 412 as the abutment 150 of the previous embodiment.
  • the external joining recess 414 is corresponding to an external joining projection of a fixture or a lab analog and formed in the shape of a cylinder.
  • a second unevenness 416 is projected from the sidewall of the external joining recess 414 and oriented to the top and bottom to easily combine the impression coping and the fixture 110.
  • the second unevenness 416 is formed in the shape of a convex half cylinder corresponding to the first unevenness 132 of the fixture 110 and prevents the impression coping 400 from rotating on the fixture 110.
  • the internal joining projection 412 is formed around the external joining recess 414. The internal joining projection 412 corresponds to the internal joining recess of a fixture and enables stable bonding between the fixture and the impression coping 400.
  • a second screw hole 426 is formed corresponding to a screw hole of the fixture in the impression coping 400.
  • a coping screw 430 may be fastened on the top of the fixture or lab analog via the second screw hole 426.
  • the coping bonding portion 420 includes an under cut 422, and an anti-rotation portion 424 is provided around the under cut 422.
  • the under cut 422 is formed lower than the adjacent exterior of the coping bonding portion 420. Accordingly, after an impression of a tooth is acquired by using impression material, the impression coping 400 is fixed to the impression material and vertically immovable. Also, the anti- rotation portion 424 has a flat surface around the under cut 422 because a part of the anti-rotation portion 424 is cut. The anti-rotation portion 424 prevents the impression coping from rotating in the impression material.
  • a lab analog 500 according to fourth embodiment is corresponding to the fixture 110 of the previous embodiment, which is fastened to a stone model for combining the impression coping 400 instead of the fixture 110 and defines the location and direction identical with the location and the direction of installing the fixture 110.
  • the lab analog 500 includes an external joining projection 520, a flange 530, an internal joining recess 532, and a stone bonding portion 510.
  • the external joining projection 520 is formed in the shape of a cylinder and a first screw hole 522 for combining the impression coping 400. Also, first unevennesses 524 corresponding to the second unevennesses 416 of the impression coping 400 are formed on the surface of the external joining projection 520..
  • the lab analog 500 and the impression coping 400 are combined with each other by the external joining projection 520 and the external joining recess 414.
  • Rotation between the lab analog 500 and the impression coping 400 is restricted by the first and second unevennesses 524 and 416.
  • the coping screw 430 is bonded to the first screw hole 522 via the second screw hole of the impression coping 420.
  • the flange 530 is installed below the external joining projection 520.
  • the flange 530 includes the internal joining recess 532 formed around the external joining projection 520.
  • the internal joining projection 412 of the impression coping is inserted into the internal joining recess 532.
  • a supporting surface 534 having a predetermined width is formed between the top of the flange 530 and the internal joining recess 532 in order to support the bottom of the impression coping 400.
  • the stone bonding portion 510 is provided below the flange 530.
  • the stone bonding portion is for fastening the lab analog 500 on a stone for forming a tooth structure and includes an under cut 512 and an anti-rotation portion 514.
  • the under cut 512 is formed lower than the flange 530. Accordingly, after an impression is acquired, the lab analog 500 is bonded to the impression coping 400 and the lab analog 500 is filled with the stone to be hardened, thereby reconstructing the tooth structure of a patient. The lab analog 500 is fastened on a stone model by the under cut 512.
  • the anti-rotation portion 514 is a flat surface whose part is cut and formed surrounding the under cut 512.
  • the anti-rotation portion 514 prevents the lab analog 500 from rotating in the stone model.
  • FIG. 13 is a partial cross-sectional view illustrating an example of bonding the impression coping to the lab analog, according to the fourth embodiment.
  • the lab analog 500 is bonded to the impression coping 400 and fastened with each other by the coping screw 430.
  • the external joining recess 414 of the impression coping 400 contains the external joining projection 522 of the lab analog 500, and the internal joining projection 412 of the impression coping 400 is inserted into the internal joining recess 532 of the lab analog 500 to be securely fastened.
  • the first unevenness 524 and the second unevenness 416 are secured to each other, thereby restricting the mutual rotation between the impression coping 400 and the lab analog 500.
  • a hook projection may be formed around the bottom of an internal joining projection of an impression coping, and a hook groove corresponding to the hook projection may be formed along the bottom of the inner side surface in an internal joining recess of a lab analog. Accordingly, in the case the impression coping is combined with or separated from the lab analog at any time, the hook projection and the hook groove may support the combination between the impression coping and the lab analog, the location of combining the impression coping and the lab analog may be recognized, and convenient combination and separation may be possible.
  • the internal joining projection may be partially cut to be discontinuously formed.
  • the pieces of the internal joining projection are partially bended to easily go in and out.
  • the impression coping 400 and the lab analog 500 described in the fourth embodiment are used for the fixture 110 and the abutment 150 according to the first embodiment.
  • the first unevenness 524 is formed on the external joining projection 520 of the lab analog 500
  • the second unevenness 416 is formed on the external joining recess 414 of the impression coping 400.
  • the impression coping and the lab analog may be formed in structures corresponding to the second, third, or other embodiments not described. Since the structures of the previous embodiments are explained in detail, another embodiment of the impression coping and the lab analog may be obviously defined based on the description of the present specification by those skilled in the art.
  • FIG. 14 is a perspective view illustrating a fixture of a dental implant according to a fifth embodiment of the present invention
  • FIG. 15 is a top view illustrating the fixture of the dental implant according to the fifth embodiment of the present invention
  • FIG. 16 is an exploded front view illustrating the fixture and the implant according to the fifth embodiment
  • FIG. 17 is a cross-sectional view illustrating an example of engaging the implant according to the fifth embodiment.
  • an implant 600 includes a fixture 610 and an abutment 650.
  • the fixture 610 includes a fixture body 620, a flange 640, an internal joining recess 642, and an external joining projection 630.
  • the fixture body 620 is composed of titanium alloy, and a screw thread is formed on the outer surface of the fixture body 620.
  • the fixture body 620 may penetrate osseous tissues by using the screw thread and after entering the osseous tissues, is bonded to the osseous tissues with the lapse of time.
  • the fixture body 620 is fixed to a mandible or maxilla as a single body and securely supports an implant as an artificial dental root.
  • the screw thread enables not only the fixture body 620 to easily enter the osseous tissues but also forms a wide attachment area for a tissue bonding portion.
  • a plurality of recesses may be formed on the end portion of the fixture body 620, together with the screw thread.
  • the surface of the fixture body 620 is processed to be porous, thereby enlarging the area attached to the osseous tissues at most.
  • an Endopore implant has a peculiar porous surface structure, thereby enlarging the surface of the fixture to a maximum and acquiring strong osseous combination in case of lack of bone material.
  • the flange 640 is provided above the fixture body 620, and the external joining projection 630 formed in the shape of a circular truncated cone is provided above the flange 640. In this case, the flange 640 and the external joining projection 630 are formed as a single body with the fixture body 620 and composed of titanium alloy.
  • the external joining projection 630 is for bonding an abutment and formed in the shape of a truncated cone.
  • a first screw hole 638 is formed at a predetermined depth in the center of the external joining projection 630.
  • the external joining projection 630 is for fastening an abutment combined by an external joining method.
  • the first screw hole 638 may be extended to the fixture body 620 according to the axis of the fixture 610 and engaged with a screw 660 penetrating the abutment 650 to fasten the crown and the abutment 650 to the fixture 610.
  • First unevennesses 632 oriented up and down are formed.
  • the first unevenness 632 is corresponding to a second unevenness 655 of the abutment 650.
  • the first and second unevennesses 632 and 655 are engaged with each other, thereby preventing relative rotation between the fixture 610 and the abutment 650.
  • the number of the first and second unevennesses is more than one and there is no upper restriction on the number.
  • the kind of unevenness may be concavely or convexly formed according to the design purpose of a designer and the length of the unevenness may be controlled.
  • the kind and the length of unevenness of the following embodiment 6 are different from the present embodiment.
  • a circular internal joining recess 642 is formed around the external joining projection 630 on the flange 640.
  • the internal joining recess 642 has a width of approximately 0.2 to 0.5 mm and a depth of approximately 0.6 to 1.0 mm and is formed in a circle.
  • a supporting surface 644 having a predetermined width is formed between a top edge of the flange 640 and the internal joining recess 642.
  • the supporting surface 644 supports the bottom of the abutment 650, together with internal joining recess 642. Though the abutment on the supporting surface 644 does not include an internal joining projection, the supporting surface 644 can support the bottom of the abutment.
  • a margin portion 646 is formed around the flange 640. The margin portion
  • the flange 640 is formed on the side of the flange 640 to have a determined thickness, thereby preventing the collapse of osseous tissues around the fixture 610 and providing a sufficient sidewall to form the internal joining recess 642.
  • the abutment 650 is a screw-retained type or cement-retained type abutment including an external joining recess 654 corresponding to the external joining projection 630 of the fixture 610.
  • the second unevennesses corresponding to the first unevennesses 632 are convexly formed on the inner wall of the external joining recess 654.
  • the external joining projection 630 is formed in the shape of a circular truncated cone
  • the external joining recess 654 is also formed in the shape a truncated cone of the same size.
  • an internal joining projection 652 is formed around the entrance of the external joining recess 654 on the bottom of the abutment 650.
  • the internal joining projection 652 is formed in the shape a ring, corresponding to the internal joining recess 642, and projected from the bottom of the abutment 650.
  • a second screw hole 658 connected with the external joining recess 654 is formed in the center of the abutment 650, through which the screw 660 is fastened to the first screw hole 638 of the fixture 610 via the second screw hole 658.
  • the abutment 650 may be provided to be engaged with the crown C and fastened to the fixture 610 by the screw 660.
  • only the abutment 650 is fastened to the fixture 610 by the screw 660 and the crown C may be fastened to the abutment 650 by using cement.
  • the height of the external joining projection 630 is approximately 0.7 mm and the depth of the internal joining recess 642 is approximately 0.8 mm, the joining length between the fixture 610 and the abutment 650 may be increased to more than twice the conventional length.
  • the sidewall of the internal joining recess 642 is formed vertical to the top of the flange 640, according to another embodiment of the present invention, at least one of the sidewalls may be tapered to form a slope facing upward and the slope surface may allow the abutment to easily attach and separate.
  • FIG. 18 is a cross-sectional view illustrating a process of placing and detaching a splinted dental prosthesis to/from a conventional fixture
  • FIG. 19 is a cross- sectional view illustrating a process of placing and detaching a splinted dental prosthesis to/from the fixture according to the fifth embodiment.
  • two fixtures 62 are implanted on an alveolar bone to be slightly slanted.
  • a prosthesis P indicates that a crown 68 overlaps a conventional external joining type abutment 64.
  • the prosthesis P processed outside includes two abutments 64, and the axis of the abutments 64 is manufactured to be slanted as the same as the fixture 62.
  • an external joining recess 65 Since the inner end of the entrance of an external joining recess 65 is disposed inside more than the top end of an external joining projection 63 in the abutments 64 whose axes are mutually slanted (refer to two-dotted lines shown in (a) of FIG. 18), the inner end of the external joining recess 65 prevents the the external joining projection 63 from entering the external joining recess 65.
  • the prosthesis P including at least two abutments 64 may not be attached and fastened to the slantingly implanted fixtures 62. Of course, though the prosthesis P may penetrate by forcibly pulling the fixture, there is a risk of destructing the bonding between the fixture and the surrounding tissue.
  • prosthesis of a middle stage has to be combined with or separated from a lab analog fastened on a stone several times. According to a conventional structure, since combination and separation are mutually limited, this process is very difficult. Therefore, a screw-bonding type prosthesis is usually used in fastening a prosthesis to one fixture and not used in forming a splinted prosthesis.
  • two fixtures 610 are implanted on an alveolar bone to be slightly slanted.
  • the external joining projection 630 formed in the shape of a truncated cone above the fixture 610, and the internal joining recess 642 is formed around the external joining recess 630.
  • a prosthesis P indicates that a crown 68 overlaps a conventional external joining type abutment 64.
  • the prosthesis P processed outside includes two abutments 64, and the axis of the abutments 64 is manufactured to be slanted as the same as the fixture 62.
  • the prosthesis P may be securely fastened on the fixture 610. Once the abutment 64 is securely disposed on the fixture
  • the bottom of the external joining projection 630 is fastened to the bottom of the joining recess 65 of the abutment 64, thereby preventing relative rotation.
  • the fastened splinted prosthesis P from the fixture 610, there is no jam.
  • FIG. 20 is an exploded front view illustrating a dental implant according to a sixth embodiment of the present invention.
  • an implant 700 includes a fixture 710 and an abutment
  • the fixture 710 includes a fixture body 720, a flange 740, an internal joining recess 742, and an external joining projection 730.
  • the fixture body 720 is composed of titanium alloy, and a. screw thread is formed on the outer surface of the fixture body 720.
  • the fixture body 7620 may penetrate osseous tissues by using the screw thread and is bonded to the osseous tissues after entering the osseous tissues with the passage of time.
  • the fixture body 720 is fixed to a mandible or maxilla as a single body and securely supports an implant as an artificial dental root.
  • the screw thread enables not only the fixture body 720 to easily enter the osseous tissues but also forms a wide attachment area for the tissue bonding portion.
  • the flange 740 is provided above the fixture body 720, and the external joining projection 730 formed in the shape of a circular truncated cone is provided above the flange 740.
  • the flange 740 and the external joining projection 730 are formed in a single body with the fixture body 720 and composed of titanium alloy.
  • the external joining projection 730 is for bonding an abutment and formed in the shape of a circular truncated cone.
  • a first screw hole 738 is formed at a predetermined depth in the center of the external joining projection 730.
  • a circular internal joining recess 742 is formed around the external joining projection 730 on the flange 740.
  • the internal joining recess 742 has a width of approximately 0.2 to 0.5 mm and a depth of approximately 0.6 to 1.0 mm and is formed in a circle.
  • first unevennesses 743 oriented to top and bottom are formed on the bottom of the inner wall of the internal joining recess 742.
  • the first unevennesses 743 is corresponding to second unevennesses 753 of the abutment 750.
  • the first and second unevennesses are engaged with each other, thereby preventing relative rotation between the fixture 710 and the abutment 750.
  • the unevennesses are formed on a portion combined by an internal joining method and formed on the bottom of the inner wall instead of the entire height of the internal joining recess 743. This is for preventing the relative rotation between the fixture 710 and the abutment 750, and its length is sufficiently long enough to secure to each other.
  • a supporting surface 744 having a predetermined width is formed between a top edge of the flange 740 and the internal joining recess 742.
  • a margin portion 746 is provided around the flange 740.
  • the margin portion 746 is formed on the top of the flange 740 to has a determined area, thereby preventing the collapse of osseous tissues around the fixture 710 and providing a sufficient sidewall to form the internal joining recess 742.
  • minute rough surface 749 are formed along the sidewall of the flange 740, namely, the outer wall of the margin portion 746.
  • the minute rough surface 749 forms a plurality of unevenness lines along the circumference of the flange 740, may be easily bonded to peripheral gingival tissues, and may prevent the peripheral gingival tissues from being collapsed after the passage of time.
  • the abutment 750 is a screw-retained type or cement-retained type abutment including an external joining recess 754 corresponding to the external joining projection 730 of the fixture 710.
  • the external joining recess 754 is also formed in shape a circular truncated cone with the same size of the external joining projection 730.
  • the internal joining projection 752 is formed around the entrance of the external joining recess 754 below the abutment 750.
  • the internal joining projection 752 is formed around the entrance of the external joining recess 754 below the abutment 750.
  • first and second unevennesses 743 and 753 are convexly or concavely formed, respectively. According to another embodiment of the present invention, first and second unevennesses may be concavely and convexly formed, similar to a CAMLOG system.
  • a second screw hole 758 connected with the external joining recess 754 is formed in the center of the abutment 750, through which the screw 760 is fastened to the first screw hole of the fixture 710 via the second screw hole 758.
  • the abutment 750 may be provided to be engaged with the crown C and fastened to the fixture 710 by the screw 760.
  • only the abutment 750 is fastened to the fixture 710 by the screw 760 and the crown C may be fastened to the abutment 750 by using cement.
  • the height of the external joining projection 730 is approximately 0.7 mm and the depth of the internal joining recess 742 is approximately 0.8 mm, the joining length between the fixture 710 and the abutment 750 may be increased to more than twice the conventional length.
  • FIG. 21 is an exploded perspective view illustrating a dental implant according to a seventh embodiment of the present invention.
  • an implant 800 includes a fixture 810 and an abutment
  • the fixture 810 includes a fixture body 820, a flange 840, an internal joining recess 842, and an external joining projection 830.
  • the abutment 850 includes an internal joining projection 852 and an external joining recess 854.
  • the dental implant 800 does not include an unevenness formed on the joining projection and the joining recess.
  • the internal joining projection 852 and internal joining recess 842 are discontinuously formed, thereby preventing relative rotation between the fixture 810 and the abutment 850.
  • the construction and the material of the fixture and the material and the basic function of the abutment are similar to the previous embodiments, repetitious descriptions will be omitted.
  • the internal joining recess is discontinuously formed on the flange. Since the internal joining recess is formed to be regularly or irregularly cut, the rotation between the fixture 810 and the abutment 850 may be prevented. Also, as the case of forming unevenness, since the internal joining recess 843 is discontinuously formed, the direction of installing an abutment is easily defined and a wide supporting surface 844 for supporting a conventional abutment may be provided.
  • FIG. 22 is a perspective view illustrating an impression coping according to an eighth embodiment of the present invention
  • FIG. 23 is a perspective view illustrating a lab analog according to the eighth embodiment.
  • impression coping and the lab analog shown in FIGS. 22 and 23 are for the fixture 610 and the abutment 650 described in the fifth embodiment and are used in manufacturing a prosthesis after the fixture 610 is implanted into an alveolar bone.
  • an impression coping is used for defining the location and direction of an implanted fixture in acquiring an impression and a material fixed to the fixture before the impression of a tooth is acquired by using impression material.
  • the lab analog is attached to the impression coping fastened to the impression material and fastens the acquired impression to a stone.
  • a stone model that is the same as the tooth and peripheral structure may be manufactured via the impression coping and the lab analog.
  • An accurate prosthesis may be manufactured via the stone model.
  • an impression coping 900 includes a coping body 910 and a coping bonding portion 920.
  • the coping body 910 is fastened on the fixture as an abutment and includes an external joining recess 914 and an internal joining projection 912 as the abutment 650 of the previous embodiment.
  • the external joining recess 914 is corresponding to an external joining projection of a fixture or a lab analog and formed in the shape of a circular truncated cone.
  • a second unevenness 916 is projected from the sidewall of the external joining recess 914 and oriented to the top and bottom to easily combine the impression coping and the fixture 610.
  • the second unevenness 916 is formed in the shape of a convex half circular truncated cone corresponding to the first unevenness 632 of the fixture 610 and prevents the impression coping 900 from rotating on the fixture 610.
  • the internal joining projection 912 is formed around the external joining recess 914.
  • the internal joining projection 912 is corresponding to the internal joining recess of a fixture and enables stable bonding between the fixture and the impression coping 900.
  • a second screw hole 926 is formed corresponding to a screw hole of the fixture in the impression coping 900.
  • a coping screw 930 may be fastened on the top of the fixture or lab analog via the second screw hole 926.
  • the coping bonding portion 920 includes an under cut 922, and an anti-rotation portion 924 is provided around the under cut 922.
  • the under cut 922 is formed lower than the adjacent exterior of the coping bonding portion 920. Accordingly, after an impression of a tooth is acquired by using impression material, the impression coping 900 is fixed to the impression material and vertically immovable.
  • the anti- rotation portion 924 is a flat surface around the under cut 922, and a part of the anti- rotation portion 924 is cut. The anti-rotation portion 924 prevents the impression coping from rotating in the impression material. Referring to FIG.
  • a lab analog 1000 according to the eighth embodiment is corresponding to the fixture 610 of the previous embodiment, which is fastened to a stone model for combining the impression coping 900 instead of the fixture 610 and defines the location and direction to be identical with the location and the direction of installing the fixture 610.
  • the lab analog 1000 according to the present embodiment includes an external joining projection 1020, a flange 1030, an internal joining recess 1032, and a stone bonding portion 1010.
  • the external joining projection 1020 is formed in the shape of a circular truncated cone and a first screw hole 1022 for combining the impression coping 900. Also, first unevennesses 1024 corresponding to the second unevennesses 916 of the impression coping 900 are formed on the outer surface of the external joining projection 1020. Accordingly, the lab analog 1000 and the impression coping 900 are combined with each other by the external joining projection 1020 and the external joining recess 914. Mutual rotation between the lab analog 1000 and the impression coping 900 is restricted by the first and second unevennesses 1024 and 916.
  • the coping screw 930 is bonded to the first screw hole 1022 via the second screw hole of the impression coping 920.
  • the flange 1030 is installed below the external joining projection 1020.
  • the flange 1030 includes the internal joining recess 1032 formed around the external joining projection 1020.
  • the internal joining projection 912 of the impression coping is inserted into the internal joining recess 1032.
  • a supporting surface 1034 having a predetermined width is formed between the top of the flange 1030 and the internal joining recess 1032 in order to support the bottom of the impression coping 900.
  • the stone bonding portion 1010 is provided below the flange 1030.
  • the stone bonding portion is for fastening the lab analog 1000 on a stone for forming a tooth structure and includes an under cut 1012 and an anti-rotation portion 1014.
  • the under cut 1012 is formed lower than the flange 1030. Accordingly, after an impression is acquired, the lab analog 1000 is bonded to the impression coping 900 and the lab analog 1000 is filled with the stone to be hardened, thereby reconstructing the tooth structure of a patient.
  • the lab analog 1000 is fastened on a stone model by the under cut 1012.
  • the anti-rotation portion 1014 is a flat surface whose part is cut and formed surrounding the under cut 1012. The anti-rotation portion 1014 prevents the lab analog 1000 from rotating in the stone model.
  • FIG. 24 is a partial cross-sectional view illustrating an example of coupling the impression coping to the lab analog, according to the eighth embodiment.
  • the lab analog 1000 is bonded to the impression coping 900 and fastened with each other by the coping screw 930.
  • the external joining recess 914 of the impression coping 900 contains the external joining projection 1022 of the lab analog 1000, and the internal joining projection 912 of the impression coping 900 is inserted into the internal joining recess 1032 of the lab analog 1000 to be stably fastened.
  • the first unevenness 1024 and the second unevenness 916 are bonded to each other, thereby restricting rotation between the impression coping 900 and the lab analog 1000.
  • a hook projection may be formed around the bottom of an internal joining projection of an impression coping, and a hook groove corresponding to the hook projection may be formed along the bottom of the inner side surface in an internal joining recess of a lab analog. Accordingly, in the case the impression coping is combined with or separated from the lab analog at any time, the hook projection and the hook groove may support the combination between the impression coping and the lab analog, the location of combining the impression coping and the lab analog may be recognized, and convenient combination and separation may be possible.
  • the internal joining projection may be partially cut to be discontinuously formed. When inserting into or separating from an internal joining recess, the pieces of the internal joining projection are partially bended to easily go in and out.
  • the impression coping 900 and the lab analog 1000 described in the eighth embodiment are used for the fixture 610 and the abutment 650 according to the fifth embodiment.
  • the first unevenness 1024 is formed on the external joining projection 1020 of the lab analog 1000
  • the second unevenness 916 is formed on the external joining recess 914 of the impression coping 900.
  • the impression coping and the lab analog may be formed in structures corresponding to the sixth, seventh, or other embodiments not described. Since the structures of the previous embodiments are explained in detail, another embodiment of the impression coping and the lab analog may be obviously defined based on the description of the present specification by those skilled in the art.
  • a fixture including an internal joining recess basically employs an external joining method and incorporates the advantages of an internal joining method, thereby solving the problems of the external joining method. Namely, combination between the internal joining recess and an internal joining projection is used, thereby increasing the contact surface and length between the fixture and an abutment. Accordingly, the fixture and the abutment may be securely combined. Therefore, since a practitioner performing a dental procedure uses an abutment manufactured corresponding to a fixture, the merits of both of the external joining type and the internal joining type may be applied and optimal effects designated by the practitioner may be obtained.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

L'invention concerne un implant dentaire et des produits connexes permettant la fixation stable d'une structure supérieure et assurant un usage polyvalent. L'implant comprend une fixation et un pilier. La fixation comprend une projection de liaison externe cylindrique et une cavité de liaison interne autour de la projection. Le pilier comprend une cavité de liaison externe pour la fixation et une projection de liaison interne. La projection de liaison externe et la cavité de liaison externe sont liées mutuellement, ce qui met en oeuvre un procédé de liaison externe. La cavité de liaison interne et la projection de liaison interne sont liées mutuellement, ce qui met en oeuvre un procédé de liaison interne. On peut ainsi associer de façon stable le pilier et la couronne à la fixatio.
PCT/KR2005/002162 2004-08-20 2005-07-06 Implant dentaire, transfert d'empreinte et analogue de laboratoire pour l'implant dentaire WO2006019225A1 (fr)

Applications Claiming Priority (4)

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KR1020040065731A KR100597392B1 (ko) 2004-08-20 2004-08-20 치과 임플란트, 임프레션 코핑 및 랩 아날로그
KR10-2004-0065731 2004-08-20
KR1020040074573A KR100597394B1 (ko) 2004-09-17 2004-09-17 치과 임플란트, 임프레션 코핑 및 랩 아날로그
KR10-2004-0074573 2004-09-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010068134A1 (fr) * 2008-12-12 2010-06-17 ГЛУХОВА, Татьяна Николаевна Prothèse dentaire
EP2412336A1 (fr) * 2010-07-29 2012-02-01 Vanotech Sagl Pièce dentaire auxiliaire pour la fabrication de prothèses dentaires
EP2393446A4 (fr) * 2009-02-04 2016-04-06 Mid Corp Système, procédé et appareil destinés à implanter des implants dentaires
CN112292096A (zh) * 2018-06-04 2021-01-29 Tri牙种植体国际股份公司 牙种植体和假牙
US11331171B2 (en) * 2017-03-20 2022-05-17 Straumann Holding Ag Implant analog

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WO2010068134A1 (fr) * 2008-12-12 2010-06-17 ГЛУХОВА, Татьяна Николаевна Prothèse dentaire
EP2393446A4 (fr) * 2009-02-04 2016-04-06 Mid Corp Système, procédé et appareil destinés à implanter des implants dentaires
EP2412336A1 (fr) * 2010-07-29 2012-02-01 Vanotech Sagl Pièce dentaire auxiliaire pour la fabrication de prothèses dentaires
US11331171B2 (en) * 2017-03-20 2022-05-17 Straumann Holding Ag Implant analog
CN112292096A (zh) * 2018-06-04 2021-01-29 Tri牙种植体国际股份公司 牙种植体和假牙
US11911239B2 (en) 2018-06-04 2024-02-27 TRI Dental Implants Int. AG Dental implant and superstructure for dental prosthesis

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