Surveying instrument and method for dual-path insertion dentures

Details Surveying instrument and method for dual-path insertion dentures Surveying instrument and method for dual-path insertion dentures

1986-06-23

1988-02-02

Mancene, Gene

Dentistry

Apparatus

Having gauge or guide

433 75, 433 49, A61C 1904

Patent

active

047226862

ABSTRACT:
An instrument and method for establishing those relationships and modifications required for making and properly fitting a removable partial denture suitable for dual paths of insertion and removal. The instrument includes a platform having a surface for supporting a dental model and, alongside that surface, at least one guide track. An upstanding base is supported upon the track for movement therealong and is equipped with an extendable and rotatable head. The head carries a pivot shaft that is parallel with the plane of the support surface and that may be adjusted longitudinally along, and rotated about, its longitudinal axis. In use, such axis is aligned with that point on an abutment tooth of the model that is to serve as the intended point of rotation for insertion and removal of a partial denture. A transverse bar is carried by the shaft and is equipped at its end with a blade parallel with the axis of the shaft. By extending the bar to bring the blade into contact points for the respective abutment teeth, and then rotating the pivot shaft about its axis, a user may readily and accurately establish the interference areas requiring removal of tooth material and, in addition, those areas where wax must be added (and may later be trimmed by the blade) to block out undercuts that would otherwise prevent proper insertion and removal of the denture.

REFERENCES:
patent: 2528053 (1950-10-01), Harris
patent: 3417471 (1968-12-01), Mitchell
patent: 4573917 (1986-03-01), Erickson

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