Page 16 - Directions for the manipulation of the Gysi adaptable articulator

12 (Fniui The Dental Cosmos.) 111. No. 9. The Incisor Path Register is here shown in position on the upper trial plate, ''r" is the recording point, "h" the little handle by which the point may be raised, and "w" the little slot in which the handle may be locked. Note especially that the Incisor Guide is so mounted that the point, when released, projects half its length below the upper trial plate. This maintains pressure on the Horseshoe Plate and permits watching the pattern traced in the wax. there by the Httle pin which turns in the horizontal slot. It is some- times necessary to cut back the labial surface of the upper trial plate to make the registering point come at the proper location on the Horseshoe Plate. If this is done, the upper anteriors will then be set to the edge of the lower trial plate. Blackening The Horseshoe Plate The lower trial plate is now removed from the mouth. The anterior triangular section of the Horseshoe Plate is blackened to receive the tracings of the registering point of the Incisor Path Register. This blackening may be best accomplished by dipping a pledget of cotton in oil of cloves, lighting it and holding the anterior part of the plate in the smoke. Very little wax should then be The melted over the smoke deposit to prevent its being rubbed off. blackened area, at a later stage of the work is shown in illustration No. 17, page 18.