Patent ID: 6106285
Filing Date: 2000-08-22
Classification: A61C

Abstract:
An apparatus for tracing a centric relation of a mandible comprising a stylus arranged at a point, where an occlusal plane and a mid-sagittal plane cross a line extending between central fossae of mandibular first molars, and a tracing plate adapted to be mounted to a maxilla at a region corresponding to the stylus, further comprising:a ball threadedly coupled to said stylus in such a fashion that it is fitted around said stylus in the form of a nut and cylinder;a base plate having a circular hole provided with an arc-shaped surface serving as a seat for said ball;a support plate arranged over said base plate and coupled to said base plate while being vertically spaced from said base plate, said support plate having a circular hole provided with an arc-shaped surface cooperating with said arc-shaped surface of said base plate to clamp said ball therebetween when said support plate is in a state coupled to said base plate; anda plurality of support members each mounted to a desired portion of said base plate at one end thereof and engaged with a desired surface portion of a dentition at the other end thereof, thereby maintaining said base plate at a desired position.