Dentistry – Prosthodontics – Holding or positioning denture in mouth
Patent
1996-04-23
1998-07-14
O'Connor, Cary E.
Dentistry
Prosthodontics
Holding or positioning denture in mouth
433223, A61C 13225
Patent
active
057794774
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method for producing, by means of one or more wire-feeding tracks, artificial supporting members which can be in the form of dental bridges for use in the human body. The novel method includes two or more manufacturing stages in which, in a first manufacturing stage, at least two supporting member parts are matched together by machining of contact surfaces, via which the supporting member parts are joined together. In conjunction with the matching, positional information is obtained on the relative positions of the supporting member parts or of the contact surfaces. Positional information on the relative positions of the supporting member parts or of the contact surfaces is identified in the first manufacturing stage. In the second manufacturing stage, supporting member parts which have been matched are joined together using the identified information on the positions. The method utilizes a bearing member on which the supporting member parts are applied during the first manufacturing stage. The supporting member parts are moved or are placed in relation to a plane, for example a horizontal plane, which extends at right angles with respect to a selected direction, preferably the longitudinal direction, of the supporting member parts when these assume their mutually matched positions. The invention also relates to an appliance for accomplishing the method.
BACKGROUND OF THE INVENTION
It is already known from Swedish Patent 8605272-7 (455 156) to produce a dental bridge using two manufacturing stages. Positional information obtained from or in the first stage is used in the second manufacturing stage in order to simplify the adjustment work. The supporting member parts are matched to each other and machining members for producing contact surfaces between the supporting member parts for action of the supporting member parts in predetermined positions, which are transferred to the second subsidiary stage, which includes laser welding, adhesive bonding, etc., of the supporting member parts.
SUMMARY OF THE INVENTION
There is a need to be able to carry out the production of dental bridges in a manner which is simplified with respect to handling. The present invention solves this problem.
In accordance with the invention, one or more wire-conveying tracks are used in conjunction with production. It must be possible for the position of the wire-feeding tracks in relation to the bearing member, or rather in relation to a plane through the supporting parts arranged on the bearing member, to be adjusted. The invention also solves this problem.
The arrangement and the method concerning production of the supporting member will be able to permit a spark machining function in association with the bearing member and the supporting member parts which are arranged on the latter. The invention solves this problem.
There is a requirement to be able to automate the production process to a greater extent. The invention also solves this problem.
In order to achieve an efficient production method, it may be necessary, in the first subsidiary stage, to carry out machining of two contact surfaces simultaneously on one and the same supporting member part, i.e. on both sides of the supporting member part. The invention aims to solve this problem.
There is a need to be able to use one joining member (laser welding member) for serving several pairs of contact surfaces. The invention solves this problem and proposes movement in a given plane in an efficient and clearly defined manner.
It must be possible for a plurality of joining members to be used to serve two or more pairs of contact surfaces along the curved length of the dental bridge. The invention solves this problem.
A user-friendly arrangement with a spark machining unit and bearing members for supporting member parts is necessary for an efficient production procedure. The invention also solves this problem.
In some cases it is necessary, in connection with the production of a dental bridge, to design the bridge with an at
REFERENCES:
patent: 5052928 (1991-10-01), Andersson
patent: 5195890 (1993-03-01), Johansson et al.
patent: 5286196 (1994-02-01), Brajnovic et al.
patent: 5419700 (1995-05-01), Sillard
patent: 5630717 (1997-05-01), Zuest et al.
Nobel Biocare AB
O'Connor Cary E.
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