Page 33 - Directions for the manipulation of the Gysi adaptable articulator

29 V. Determining Position of the R(rjATioN Poixis. 1. Remove Condyle Path Register and cut cords. 2. Liberate pin of Incisor Register so that it may follow the pattern in wax. 3. Place Rotation Points at outer ends of paths. 4. Make lateral movements of articulator and push Rotation Points inward until Incisor Register follows the outlines of the' pointed arch in the blackened wax. 5. Fix the Rotation Points in position. VI. MouNTiNCj OF Teeth. 1. Remove Horseshoe Plate and replace its thickness by wax drops in the molar region. 2. Transfer median line, and length of wax border, and hori zontal line to plaster model. 3. Cut away w^ax upper border on one side. 4. Begin at median line of upper and set one half the set. Wax teeth firmly in position. Cut away other half of upper border and set remaining uppers. Cut away half of louver w^ax border. Set low^er first molar, lower second molar, seconci bicuspid, first bicuspid and cuspid. Do same on other side. Set lower anteriors for desired overbite and expression. Determine final relations of the teeth by making lateral move- ments of the articulator in the manner shown in illustration Xo. 27, page 26. Changing the Depth of Overbite. If a somewhat more pronounced o^'erbite of the incisors is to be obtained, wax a piece of sheet metal upon the Incisor Guide Incline, to make it steeper. With a very flat palate it will be well rather to reduce the inclination of this plane by w^axing on pieces of sheet metal to be less steep than the plane is. In this way the overbite of the incisors will be less, and in consequence the upper plate be pushed less forward and the lower less backward. In most cases the inclination of this sliding plane is to be left as It is on the articulator.