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Device and method for attaching a member in replacement of part of a set of teeth
| Details |
Inventors: Sichler, Heimo; de Nieuport, Hans M.;
Assignee: Accius B.V. (Bergen op Zoom, NL)
Primary Examiner: Lucchesi; Nicholas D.
Assistant Examiner:
Attorney, Agent or Firm: Michaelson; Peter L.
A device for attaching a member that replaces a part of a set of teeth, wherein the device has a pin to be implanted in a jawbone and a coupling pin with a ball-and-socket joint disposed between the coupling pin and the implantation pin. The ball and/or the socket of the joint is made of a memory material. The memory position is such that at body temperature pivotal motion of the ball-and-socket joint can simply be brought into a desired position. Thus, the coupling pin can be brought into any desired position, virtually independently of the orientation of the implantation pin in the jaw, so that the dental-replacement member can be fitted readily without any tension arising therein. |
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DETAILED DESCRIPTION Another disadvantage of this known device is that the securing force is applied locally, i.
e.
at the tip of the securing screw and at the rim of the socket housing, so that it is difficult to have the ball and the socket screwed tightly together without causing them to break.
A further disadvantage of this known device is that the socket housing needs to have a rather smooth outer surface, so that it is relatively difficult to get a good grip thereon for screwing it onto the other socket part without causing any damage like burrs.
It is an object of the invention to improve this known device.
More particularly, it is an object of the invention to provide a device for attaching a dental-replacement member, which permits stepless adjustment of the orientation of the pins protruding from the jaw, even after implantation, if so desired, but not at the expense of rigidity.
Further, it is an object of the invention to provide a device for attaching a dental-replacement member, which has a simple construction and is readily attachable.
Still further, it is an object of the invention to provide a device for attaching a dental-replacement member, wherein the loosening and securing of the ball-socket joint does not involve turning a screw.
To that effect, the device of the type described hereinabove is characterized according to the invention in that at least one of the coupling members of the ball-and-socket joint is at least partly made of a memory material.
The memory material is provided in the ball-and-socket joint in such a way that at the operating temperature thereof there is a tendency towards a memory position, with the result that a clamping force arises which fixes the ball-and-socket joint.
Beyond a certain critical temperature, this effect does not occur and the memory material can be deformed to make the ball-and-socket joint freely movable, whereafter the ball-and-socket joint can be brought into any desired position, which desired position is fixed by adjusting the ball-and-socket joint to an operating temperature again
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