Dentistry – Prosthodontics – Holding or positioning denture in mouth
Patent
1991-04-15
1993-09-21
Mancene, Gene
Dentistry
Prosthodontics
Holding or positioning denture in mouth
433174, A61C 800
Patent
active
052463699
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an implant, either resilient or resilientless system, screwed with self-cutting ability or impacted, to be used as a substitute for a dental organ, a rotary device for designing the implantary seating, the operating method of such rotary device and the operating method of said implantable system.
BACKGROUND ART
Implants typically behave as inert bodies within the maxillaries. When the implants revert to the osseous cells a gradual thickening of the proteoglycans layer occurs. This can induce the growth of neo-forming fibrous or bony tissues.
Moreover, the clinical experience shows that the prosthetic arrangement combining a resilient less artificial implantary post with the natural and resilient dental abutment generates prothesis loosening and even breaking either at implantary posts level or at natural abutments level.
In other terms, the practitioners now have available implants made of titanium, aluminium oxyde or any other biomaterials, such implants supporting unitary prosthesis, i.e. bridges or associated prosthesis.
The system implementation causes more or less shortly the bone lysis and replacement by atypical tissue.
Such degeneration is mainly due to the absence of the implantary-alveolo ligament opposing the impacts conveyed by the mandible or the maxillary during the mastication, swallowing and even the phonation.
In spite of numerous attemps for improvement, the present systems do not elude these numerous drawbacks, i.e.:
The object of this invention is to remedy such drawbacks by providing an implantable system that exhibits the double advantage of combining thoroughly with the jawbone and of securing a "physiological mobility" similar to that of the dental organ. Obviously, the dental prosthesis life will last markedly longer.
Another object of this invention is to remedy the thermal necrosis due to the osseous cells overheating by providing an implementary seating intended to receive said implantable system using a rotary device with internal irrigation.
The seating thus obtained can receive either a screwed and self-cutting implant, in the case of thick, bony walls, withstanding the cutting strengths or an impacted implant in the case of narrower bony walls.
SUMMARY OF THE INVENTION
To this end, the first object of the invention is to provide an implantable system for supporting a dental prosthesis of the type including on one hand an implant body consisting of a solid cyclindrical tube provided with an internal threading connected to the upper opening of said implant body combined with an asymmetrical hexagon socket mechanism.
The presence of an asymmetric hexagon mechanism combined with the internal threading of said implant body enables on one hand to place a device for positioning the implant inside the bone and on the other hand to screw and seal prosthetic inserts consequently.
The hexagon asymmetry ensures that on handling by the prosthesis laboratory the correct position of the prosthetic insert will be found.
The implant body includes in its largest lower portion a recess extending across the width of said implant body and the maximal height between the bottom portion of said internal threading combined with the asymmetric hexagon mechanism and the apical portion of said cylindrical tube, thus forming two communicating openings arranged oppositely along the said cylindrical tube, each vertical edge of this recessed portion being in the form of a side face.
A maximal gap arrangement inside said implant body through the large emptied portion aims at providing a minimal metallic mass available within said implantary seating while the maximal gap is to be filled in with osseous regeneration during the bone cicatrization.
The presence of said side faces is intended to achieve the said implant body keying inside the osseous tissues.
Thus, the said implant body will have the form of a cylinder provided with an external threading the said external threading of said cylindrical tube will have a thread of at least 1.25 mm.
The said body impl
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Lucchesi Nicholas D.
Mancene Gene
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