GB298654A - An improved appliance for registering bites and reproducing movements of the jaws and articulator working with this appliance with tooth gauge - Google Patents

Abstract

298,654. Vignale, O. R. May 7, 1927. Teeth, artificial; teeth, regulating.- Apparatus for use in making artificial dentures and in orthodontia comprises (1) a bite register, Figs. 1 and 2 similar in construction to that described in Specification 191,442 but having rearward projections k' from the chin-piece, corresponding to the lower jaw and adapted at their free ends k<3> to enter boxes m<1> attached to the main framework so that, on movement of the patient's jaw, impressions corresponding to said movements are formed in softened plastic material in the boxes m<1>; (2) an articulator, Figs. 4 and 6, the upper and lower members q, p of which are flexibly connected by springs p<1>, p<2>, and the lower member p of which is formed with projections p<3> engaging the hardened plastic material in the boxes m<1> which have been transferred from the bite register to the upper member q, so that the movements of the patient's jaw may be reproduced; and (3) a gauge, Fig. 7, comprising bars s, s<1>, s<2> arranged in the form of an adjustable equilateral triangle and troughs s<3> containing wax on which the arches of the teeth may be scribed by a pivoted wire s<10> the gauge then serving as a guide in setting up the teeth. The bite register is adjustable to the size of the patient's head and its chin-piece k with the extensions k<2> is connected to the fixed parts of the framework by links h<4>, h<6> and springs l<1>, o corresponding to the muscles controlling the natural jaw. A forked rod r<5> adjustably held in a member r - - r<1>, itself, adjustably carried by the chin-piece, is pressed into the wax bite block within the patient's mouth and is transferred therewith to the articulator, as shown in Fig. 6 The models are then fitted to the wax base plates of the bite block and are plastered to the plates q<3>, p<9> of the articulator. The upper plate q<3> of the articulator is carried by a bar q<2> hinged to the upper member q at q<1> but adapted to be locked thereto when required by a screw q<4>. The gauge, Fig. 7, is secured in the member r - - r<4> on the articulator by means of its rod s<4> which replaces the forked member r<5> after the latter, together with the bite block has been removed. The Provisional Specification describes also minor modifications of the bite register, and a modified gauge in which the wax troughs are replaced by flexible steel bands carried in slotted blocks at the corners of the triangle formed by the bars s, s<1>, s<2>.