Dentistry – Prosthodontics – Holding or positioning denture in mouth
Patent
1998-05-27
1999-06-29
Wilson, John J.
Dentistry
Prosthodontics
Holding or positioning denture in mouth
433169, A61C 800
Patent
active
059159685
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention is directed to an enossal single tooth implant for a firmly seated dental prosthesis, having an essentially cylindrical base member introducible into a bore introduced into a jaw bone, said base member comprising a blind bore open toward its coronal or outer end, having a spacer sleeve emplaceable on the coronal or outer face edge of the base member, an implant post introducible into the blind bore and connectable to the base member, said implant post penetrating an inside bore of the spacer sleeve, which has a connecting means for the twist-resistant fastening of the spacer sleeve on the base member and a fastening head for the dental prosthesis.
German Patent Application 195 09 762.9-32 discloses the improvement of a dental implant according to German Letters Patent 40 28 855, whereby the implant post, which also serves therein as retainer screw for the spacer sleeve relative to the base member, comprises the fastening head for the firmly seated dental prosthesis at its coronal end, said fastening head projecting beyond the spacer sleeve. For example, the dental prosthesis is either glued to the fastening head or is connected thereto by cementing.
When the species-defining single tooth implant of German Patent Application 195 09 762.9-32 is modified to the effect that the implant post ends coronally at a distance from the coronal face edge within the inside bore of the spacer sleeve, whereby the coronal end region of the spacer sleeve itself then forms the fastening head for the dental prosthesis, then the dental prosthesis can in fact likewise be attached to the spacer sleeve with a glued or cemented connection. However, there are difficulties in securing the framing or structure of the dental prosthesis with a securing screw that preferably proceeds perpendicular to the longitudinal center axis of the spacer sleeve in those applications wherein a screwed connection is desired between the framing of the dental prosthesis and the fastening head.
This difficulty is based on the fact that the circumferential wall of the spacer sleeve is so thin that the required forces for fastening the dental prosthesis cannot be exerted with a securing screw of the above-described type without inappropriate deformation of the spacer sleeve walls.
SUMMARY OF THE INVENTION
The invention is based on the object of further-improving the single tooth implant of the species to the effect that a screwed connection is enabled between the dental prosthesis and the fastening head without deformation of the walls of the spacer sleeve.
This object is inventively achieved in that the fastening head is formed by a coronal, hollow end region of the spacer sleeve; in that the coronal end of the implant post is cervically arranged under the end region; and that an inset nut provided with a threaded bore proceeding perpendicular to the longitudinal center axis of the spacer sleeve is arranged in the end region, and a securing screw will penetrate an opening provided in the circumferential wall of the end region and is screwable into said inset nut for securing the dental prosthesis.
It can thereby be provided that the circumferential wall of the spacer sleeve is fashioned tapering frustum-like in coronal direction in the end region.
The invention also potentially provides that the implant post can be screwed into an inside bore of the implant upon anti-twist engagement of interlocking tongues of the spacer sleeve with complementary interlocking elements of the base member.
According to a first embodiment of the invention, the inset nut is fashioned of one piece with a clevis-type web or pin that is to be put in place on the coronal face edge of the circumferential wall of the spacer sleeve.
It is provided according to a second embodiment that recesses which are positioned opposite one another are provided in the coronal face edge of the spacer sleeve, and a clevis-like web or pin which is fashioned of one piece with the inset nut is received in these recesses. An extremely exact positioning of
REFERENCES:
patent: 568995 (1896-10-01), Kirsch et al.
patent: 3866321 (1975-02-01), Valen
patent: 4988292 (1991-01-01), Rosen
patent: 5071345 (1991-12-01), Rosen
patent: 5110292 (1992-05-01), Balfour et al.
patent: 5122059 (1992-06-01), Durr et al.
patent: 5125840 (1992-06-01), Durr et al.
patent: 5431567 (1995-07-01), Daftary
patent: 5620323 (1997-04-01), Bressman et al.
patent: 5660545 (1997-08-01), Bailey et al.
patent: 5667384 (1997-09-01), Sutter et al.
Durr Walter
Kirsch Axel
IMZ Fertigungs-und Vertriebsgesellschaft fur dentale Technologie
Philogene Pedro
Wilson John J.
LandOfFree
Enossal single tooth implant does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enossal single tooth implant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enossal single tooth implant will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1370271