Apparatus for the fixation of a single-tooth restoration

Details Apparatus for the fixation of a single-tooth restoration Apparatus for the fixation of a single-tooth restoration

A - Human Necessities

61

C

83/25

A61C 8/00 (2006.01)

Patent

CA 1295856

23260-366 ABSTRACT OF THE DISCLOSURE The disclosure relates to an apparatus for the fix- ation of a single-tooth restoration to an implant in the form of an anchorage element (fixture) permanently anchored in the maxillary, comprising a substantially tubular spacer which is anchored to the anchorage element by means of a spacer screw provided with an externally threaded portion which engages in an internally threaded recess in the upper region of the fixture. the spacer screw is provided with an unthreaded waist whose length exceeds the thread diameter of the spacer screw, and has a screw head of comparatively slight diameter and with a planar or gently conical shoulder which cooperates with a corresponding annular shoulder in the tubular spacer. The apparatus is mounted in place by means of a double screwdriver whose one part fits the internal counter-abutment in the spacer sleeve and whose other part is caused to engage with the driver slot of the screw head. In the mounting operation, equal, but counter- directed torques are applied to both parts of the screwdriver so that the implant will remain unloaded during the mounting operat- on proper. :

564608

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