Dentistry – Prosthodontics – Holding or positioning denture in mouth
Patent
1998-01-14
1999-09-07
Wilson, John J.
Dentistry
Prosthodontics
Holding or positioning denture in mouth
433169, A61C 800
Patent
active
059477342
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a tooth implant arrangement with an implant body which can be inserted in a jaw and with a structural body which is held, preferably releasably, on the implant body by means of a bolt-like holding element, and which is seated elastically movable in the axial and sagittal direction with respect to the implant body with the aid of an elastic seating ling. A firing cap, a bridge element, a crown replacement or the like can be put and fixed in place.
BACKGROUND OF THE INVENTION
In a known tooth implant arrangement, such as is known as the so-called Ha-Ti implantation system, the structural body is rigidly connected with the implant body, which is rigidly implanted in the lower or upper jaws, by means of a bolt-like holding element embodied as a screw, in such a way that the structural body is inserted with its inner end into a corresponding bore of the implant body and that the fastening screw embedded in the structural body is securely tightened. Since the bridge element or crown replacement or the like fastened thereon is also maintained in place on the structural body by means of a fixation screw, the entire tooth implant arrangement is quasi immovably fixed in the lower or upper jaw. This is in contrast to natural teeth, which can at least perform a certain axial elastic movement within the jaw. Furthermore, the incisors are additionally elastically movable in a sagittal direction within certain limits within the jaws. This rigid holding of the known tooth implant arrangement in the jawbone results, among other things, in that persons which suffer from bruxism, i.e. grind their teeth at night in particular, cannot be provided with such tooth implant arrangements. The known rigid tooth implant arrangement, which is, so to speak, fixedly cemented in the jawbone, can furthermore lead to damage, in particular of the bridge element, crown replacement or the like, in persons who do not tend to grind their teeth.
A crown fastening arrangement for an implant to be placed in the jaws, essentially has a bolt part in the structural body and essentially penetrates it is provided with a screw head, and the other bolt part, which is maintained over a defined longitudinal area in the implant body, and is provided with an exterior wall, is known from DE-C-34 13 811, wherein a connecting piece is fixedly screwed to the implant body, on whose spreadable barrel-shaped head a crown connecting piece is placed, which is supported on the front ring side on the connecting piece via an elastic ring. Although this arrangement permits movement between the crown and the implant body, this movement can neither be defined nor reproduced. Since rotational security is also not provided, an uncontrolled three-dimensional mobility of the crown connecting piece is the result. Thus a mobility which could be compared with a natural tooth is not provided, particularly since a movement generally results from a load, and not mainly from a wrong or excessive load. The known arrangement not only results in a low primary stability, but also in an unrealistic structural height, particularly because of the connecting piece.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a tooth implant arrangement of the type mentioned at the outset, which has a mobility in the jaw or jawbone comparable to a natural tooth, and has a simple structure.
This object in connection with a tooth implant arrangement of the type mentioned at the outset is characterized by the bolt-like holding element between the structural body and the implant body. Two bolt parts are provided which are connected via a pivot shafi with each other.
By means of the steps in accordance with the present invention, the tooth implant arrangement is provided with mobility within the lower or upper jaws similar to that of natural teeth, along with an optimal primary stability. Thus, a tooth implant arrangement of this type can be used in more varied ways and it is subjected only to a small measure
REFERENCES:
patent: 4832601 (1989-05-01), Linden
patent: 4907969 (1990-03-01), Ward
patent: 4950131 (1990-08-01), Richter
patent: 5178539 (1993-01-01), Peltier et al.
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