Prosthetic superstructure

Details Prosthetic superstructure Prosthetic superstructure

1997-06-03

1998-12-01

Wilson, John J.

Dentistry

Prosthodontics

Holding or positioning denture in mouth

433182, A61C 1312

Patent

active

058428640

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a prosthetic superstructure.
In the case of a known superstructure of this type, the locking device is based on a snap fastener system. Such a superstructure imposes relatively high, largely uncontrolled tensile forces which jeopardize the satisfactory seating of the implant on the implant during removal of the dental prosthesis. A different, known superstructure makes use of the swiveling locking bar technique for which a swiveling locking bar can be swiveled into and out of engagement with a locking recess in the implant in order to bring about or to terminate the connection between the dental prosthesis and the connecting part of the implant. Such a superstructure admittedly does not exert any pull-off forces on the implant. However, as a laboratory-manufactured construction, it is relatively expensive and requires an appreciable number of fitting dates. The primary part of the locking device, moreover, can be the cause of hygienic problems in the mouth and even of inflammations of the mucous membrane, while the secondary part forms an interfering factor for the tongue and mucous membranes, since it forms an inwardly protruding, somewhat sharp-edged part.


SUMMARY OF THE INVENTION

It is an object of the invention to provide a superstructure, which is constructed simply and handled easily, is comfortable to wear and does not exert any pull-off forces on the implant.
The inventive superstructure can be produced cost-effectively industrially, does not exert any forces on the implant when put on or taken off and can be looked after easily by the wearer. It is very comfortable to wear, since it is embedded completely in the prosthesis construction and avoids protruding parts, and cannot be identified visually, since all parts are accommodated so as to be hidden. The inventive superstructure furthermore is wear-free and does not require any post-activation. It can be taken care of effectively with simple means and produces a compensatory effect when pushed in from different directions. Finally, it can be handled easily by the dental technician and the person being treated and exchanged without any problems and requires only a few sessions from the start to the end of the treatment.
Numerous further details and advantages arise out of the following description and the drawing, in which a preferred object of the invention is illustrated in greater detail.


IN THE DRAWINGS

FIG. 1 shows a sectional representation of a vertical, longitudinal section through an inventive superstructure, which is disposed in a dental prosthesis and fixed on an implant,
FIG. 2 shows a section along the line II--II of FIG. 1,
FIG. 3 shows a section along the line III--III of FIG. 1,
FIG. 4 shows a detailed representation of the superstructure in front view,
FIG. 5 shows a view of the right end face of the superstructure in FIG. 4,
FIG. 6 shows a section along the line VI--VI in FIG. 7,
FIG. 7 shows a section along the line VII--VII in FIG. 6,
FIG. 8 shows a section along the line VIII--VIII in FIG. 6,
FIG. 9 shows a sectional representation of the guiding and locking device for the tooth forming the actuator,
FIG. 10 shows a section along the line X--X in FIG. 9,
FIG. 11 shows a modified embodiment similar to that of FIG. 9,
FIG. 12 shows a section along the line XII--XII in FIG. 11,
FIG. 13 shows a section through the housing of the locking device along the line XIII--XIII of FIG. 14,
FIG. 14 shows a front view of the housing of the locking device,
FIG. 15 shows a side view of the housing of the locking device,
FIG. 16 shows a side view of the locking jaws,
FIG. 17 shows a front view of the locking jaw,
FIG. 18 shows a plan view of the spring for pretensioning the locking jaw,
FIG. 19 is an end view to FIG. 18,
FIG. 20 shows a side view of the adjusting shaft,
FIG. 21 shows a section along the line XXI--XXI of FIG. 20,
FIG. 22 shows a section along the line XXII--XXII of FIG. 20,
FIG. 23 shows a front view of the abutment of the guiding and locking device,
FIG. 24 shows a side

REFERENCES:
patent: 2599044 (1952-06-01), Brennan
patent: 3672057 (1972-06-01), Mays
patent: 5106299 (1992-04-01), Ghalili
patent: 5133662 (1992-07-01), Metcalfe

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