ABUTMENT COPING FOR DENTAL IMPLANT FIXTURE

Abstract

To improve gingival sealing property without decreasing aesthetic property, an abutment coping 3 for a dental implant fixture has a male screw 2a engaged to a female screw 1a formed at the intra-oral side of a dental implant fixture 1, and is cylindrically or taperedly projected at the intra-oral side of the fixture 1, and an end part of the abutment coping 3 at the fixture 1 side is made of a white ceramic and fixed at the abutment 2 so as to expose an outer peripheral surface of the abutment 2 from a part between the end part and the intra-oral side surface of the fixture 1, or to have a clearance G being 1.3 mm or less and starting from an outer peripheral surface of the abutment 2 at a part between the end part and the intra-oral side surface of the fixture 1.

Description

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a longitudinal sectional explanatory view to illustrate one example of an abutment coping for a dental implant fixture according to the present invention, where a male screw of the abutment coping is engaged to a female screw formed at the intra-oral side of a dental implant fixture and the abutment is cylindrically projected at the intra-oral side of the dental implant fixture,

FIG. 2 is a longitudinal sectional explanatory view to illustrate another example of an abutment coping for a dental implant fixture according to the present invention, where a male screw of the abutment coping is engaged to a female screw formed at the intra-oral side of a dental implant fixture and the abutment is taperedly projected at the intra-oral side of the dental implant fixture,

FIG. 3 is a longitudinal sectional explanatory view to illustrate another example of an abutment coping for a dental implant fixture according to the present invention, where a male screw of the abutment coping is engaged to a female screw formed at the intra-oral side of a dental implant fixture having a scallop structure and the abutment is cylindrically projected at the intra-oral side of the dental implant fixture, and

FIG. 4 is a longitudinal sectional explanatory view to illustrate another example of an abutment coping for a dental implant fixture according to the present invention, where a male screw of the abutment coping is engaged to a female screw formed at the intra-oral side of a dental implant fixture having a scallop structure and the abutment is taperedly projected at the intra-oral side of the dental implant fixture.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

Detailed explanation will be given below about the abutment coping for a dental implant fixture according to the present invention with reference to drawings.

FIG. 1 is a longitudinal sectional explanatory view to illustrate one example of an abutment coping for a dental implant fixture according to the present invention, where a male screw of the abutment is engaged to a female screw formed at the intra-oral side of a dental implant fixture and the abutment is cylindrically projected at the intra-oral side of the dental implant fixture. FIG. 2 is a longitudinal sectional explanatory view to illustrate another example of an abutment coping for a dental implant fixture according to the present invention, where a male screw of the abutment is engaged to a female screw formed at the intra-oral side of a dental implant fixture and the abutment is taperedly projected at the intra-oral side of the dental implant fixture. FIG. 3 is a longitudinal sectional explanatory view to illustrate another example of an abutment coping for a dental implant fixture according to the present invention, where a male screw of the abutment is engaged to a female screw formed at the intra-oral side of a dental implant fixture having a scallop structure and the abutment is cylindrically projected at the intra-oral side of the dental implant fixture. FIG. 4 is a longitudinal sectional explanatory view to illustrate another example of an abutment coping for a dental implant fixture according to the present invention, where a male screw of the abutment coping is engaged to a female screw formed at the intra-oral side of a dental implant fixture having a scallop structure and the abutment is taperedly projected at the intra-oral side of the dental implant fixture.

In these drawings, a dental implant fixture 1 is embedded in a jawbone of a missing tooth part and osseously bound with the jawbone so as to fix a dental prosthesis at the intra-oral side thereof in a dental implant treatment to recover a lost oral function of a missing tooth part. The dental implant fixture includes a female screw la to which an abutment 2 described below is engaged so as to be cylindrically or taperedly projected. Further, the intra-oral side surface of the dental implant fixture 1 may have a plane rectangular with respect to an axis of the dental implant fixture 1 as illustrated in FIGS. 1 and 2. Further, as illustrated in FIG. 3 and FIG. 4, the intra-oral side surface may have a scallop structure as considering an interdental papilla upwardly rising at the intra-oral side between adjacent teeth, in which the scallop structure has a portion corresponding to the interdental papilla upwardly rising at the intra-oral side.

An abutment 2 is fixed by engaging a male screw 2a to the female screw 1a of the dental implant fixture 1 so that a cylindrical or tapered portion at the intra-oral side of the abutment 2 projects from the intra-oral side surface of the dental implant fixture 1. The abutment 2 is to fix a dental prosthesis at the portion projected from the intra-oral side surface of the dental implant fixture 1.

An abutment coping 3 for a dental implant fixture according to the present invention is an inner cap of a composite crown which is a dental prosthesis fixed at the portion projected from the intra-oral side surface of the dental implant fixture 1. An end part of the abutment coping 3 at the dental implant fixture 1 side is made of a white ceramic and fixed at the abutment 3 so as to expose an outer peripheral surface of the abutment 2 at a part between the end part of the abutment 2 and the intra-oral side surface of the dental implant fixture 1 or to have a clearance G at a part between the end part and the intra-oral side surface of the dental implant fixture 1, where the clearance is 1.3 mm or less and starts from an outer peripheral surface of the abutment 2.

Further, the abutment coping 3 for a dental implant fixture has preferably a portion to be a margin line 3a for a dental externally attached crown at the intra-oral side, which is apart from the intra-oral side surface of the dental implant fixture 1 by a distance corresponding to a gingiva.

When the abutment coping 3 for a dental implant fixture according to the present invention is used, the abutment coping 3 for a dental implant fixture is fixed on the abutment 2 so as to expose an outer peripheral surface of the abutment 2 at a part between the end part and the intra-oral side end surface of the dental implant fixture 1 as illustrated in FIGS. 2 and 4, or to have a clearance G, which is 1.3 mm or less and starts from an outer peripheral surface of the abutment 2, at a part between the end part and the intra-oral side end surface of the dental implant fixture 1 as illustrated in FIGS. 1 and 3. Thus, since a gingiva enters into the clearance G, invading of saliva or bacteria into the dental implant fixture 1 side along a composite crown, which is a dental prosthesis, can be prevented by the gingiva entered into the clearance G. Accordingly, since there is no portion as a hotbed of invaded bacteria or the like, an implant body is not finally dropped.

The clearance G for a gingiva to enter is a small clearance having a maximum height of 1.3 mm or less in the axial direction of the dental implant fixture 1, and having a depth in the direction rectangular to the axis of the dental implant fixture 1 being equivalent to a length from the outer periphery of the intra-oral side end of the dental implant fixture 1 to the outer peripheral surface of the abutment 2 at the intra-oral side end of the dental implant fixture 1, and is formed so as to make a gingiva contact at least with the intra-oral side end of the dental implant fixture 1 and the dental implant side end of the abutment coping 3 for a dental implant fixture according to the present invention, whereby a gingiva can readily enter into the clearance G in a comparatively short time when it grows.

Further, the abutment coping 3 for a dental implant fixture according to the present invention made up of a white ceramic having a comparatively similar color tone to that of a natural tooth. Thus, aesthetic property is not lost by exposure of a material different from a dental prosthesis such as a metallic abutment, at the gingival side during a period before recovery of a gingiva to the healthy state, between interdental papillae, or at the gingival side at the time of peeling of a gingiva.

Such an effect can be remarkably exercised in the embodiment of the abutment coping 3 for a dental implant fixture according to the present invention that the externally attached crown has a portion to be the margin line 3a for a dental externally attached crown at a part at the intra-oral side, which is apart from the intra-oral side surface of the dental implant fixture 1 by a distance corresponding to a gingiva, rather than the embodiment that an externally attached crown of a composite crown as a dental prosthesis starts from an end of the intra-oral side of the dental implant fixture 1.

Claims

1. An abutment coping for a dental implant fixture, with the structure that the abutment coping is provided and fixed to an abutment having a male screw engaged to a female screw formed at the intra-oral side of a dental implant fixture and being cylindrically or taperedly projected at the intra-oral side of the dental implant fixture, wherein an end part of the abutment coping at the dental implant fixture side is made of a white ceramic and fixed at the abutment so as to expose an outer peripheral surface of the abutment at a part between the end part and the intra-oral side surface of the dental implant fixture, or to have a clearance being 1.3 mm or less and starting from an outer peripheral surface of the abutment at a part between the end part and the intra-oral side surface of the dental implant fixture.

2. The abutment coping for a dental implant fixture as claimed in claim 1, wherein the abutment coping has a portion to be a margin line for a dental externally attached crown at the intra-oral side, which is apart from the intra-oral side surface of the dental implant fixture by a distance corresponding to a gingiva.