Dentistry – Prosthodontics – Holding or positioning denture in mouth
Patent
1985-07-22
1988-09-20
Peshock, Robert
Dentistry
Prosthodontics
Holding or positioning denture in mouth
A61C 800
Patent
active
047722045
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION(S)
This U.S. application stems from PCT International Application No. PCT/SE84/00403 filed Nov. 23, 1984.
The present invention relates to an implant for attachment of dental prostheses.
An implant is an anchoring means, which is specifically intended to facilitate anchoring of dental prostheses in the jaw-bone, and which is used when other possibilities of attachment do not exist.
Previously known anchoring means, hereinafter referred to as implants, comprise an externally threaded screw-shaped member which is arranged with an upper portion shaped as a cylindrical screw head, having the top portion arranged as an hexagonal attachment portion which is intended to facilitate attachment with an associated tool. A blind hole extends from said attachment portion, arranged with an internal screw thread.
When such implants are used, a small incision is made in the buccal mucoperiosteum, thereby revealing the jaw-bone. Thereafter a hole is drilled in the jaw-bone, first with a dental drill and then with a larger special purpose drill, whereafter the hole is threaded with a screw tap. After cleaning the hole, the screw-shaped member is screwed down into the hole with use of a special purpose tool which attaches to the hexagonal attachment portion. A cover screw is thereafter attached to the internally threaded hole in the screw-shaped member. Said cover screw includes a screw head which covers the attachment portion existing at the screw-shaped member. The gum is thereafter sewn together over the attached device, which is left during a period of 4-6 months to osseointegrate with the jaw-bone.
After this period of time, the device is revealed, and the cover screw removed. A pillar, having a first portion with cylindrical cross-section extending from an end surface, which is followed by a second portion with a smaller diameter and having an external screw thread, is screwed with the threaded portion into the internally threaded hole within the screw shaped member attached to the jaw-bone. From the end surface wherefrom the first cylindrical portion extends, a centrally located blind hole extends into the pillar, arranged with an internal screw thread. A matrix pillar is attached to said threaded hole, arranged substantially corresponding to the previously discussed pillar, apart from the internally threaded hole. A proof impression is made thereafter, intended to be utilized by a dental technician when manufacturing the bridge. The matrix pillar and the pillar are then removed and the cover screw reattached. The buccal mucoperiosteum is returned back over the members attached to the jaw-bone, pending the completion of the work on the bridge by the dental technician.
When manufacturing the bridge, every impression of a matrix pillar is used to accomplish a through hole in the supporting metal structure located behind the teeth front. When attaching the bridge, the cover screw is removed and replaced by the previously utilized pillar. An attachment screw is applied against the bridge and attached with its threaded portion against the internally threaded hole in the pillar, whereafter the hole in the metal structure of the bridge, above the head of the attachment screw, is filled with a suitable material, e.g. a synthetic resin material.
Certain modifications with regard to the above described previously known implant are also known, and particularly with regard to the design of the pillar. Previously used pillars have been designed to include a tubular cylindrical member in combination with a screw-shaped member which, in accordance with the member attachable to the jaw-bone, is arranged with a head having a hexagonal attachment member. Said attachment member is, when mounted, embraced by a tubular distance means arranged in an intermediate position between the upper end surface of the cylindrical member and the bridge intended to be attached. The number of implants used is related to the extension of the bridge, but for attachment of a complete bridge, a number of six implants
REFERENCES:
patent: 4177562 (1979-12-01), Miller et al.
patent: 4187609 (1980-02-01), Ebelman
patent: 4416629 (1983-11-01), Mozsary et al.
P-I Branemark et al., "Osseointegrated Implants in the Treatment of Edentulous Jaw", 1977, pp. 21-38.
Proceedings of the Toronto Conference on Osseointegration in Clinical Dentistry, reprinted from The Journal of Prosthetic Dentistry, vol. 49, No. 6 (Jun., 1983), and vol. 50, Nos. 1, 2 and 3 (Jul., Aug. and Sep., 1983).
Astra Meditec Aktiebolag
Peshock Robert
LandOfFree
Implant for attachment of dental prostheses does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Implant for attachment of dental prostheses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Implant for attachment of dental prostheses will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1745900