Page 15 - Directions for the manipulation of the Gysi adaptable articulator

11 per trial plate. When even pressure all around has beeu estab- lished, the occlusal surface of the upper trial plate should be 111. No. 8. On the left, the lower trial plate with the Horseshoe Plate properly mounted. On the rig;ht, the upper trial plate which has been pressed down upon the Horseshoe Plate and built up in places and pressed down again until the pressure is even all around. It is im- portant to have this pressure even. Before recording the condyle paths the festoons made by the Horseshoe Plate must be trimmed away, leaving a plane surface. A little vaseline is applied over the surface of the Horseshoe Plate. trimmed free of the little festoons formed by the margins of the plate. This will permit the upper trial plate to slide smoothly on the Horseshoe Plate while records are being made. Mounting The Incisor Path Register The Incisor Path Register is mounted on the labial surface of the upper trial plate with the registering point in the median line. It is intended that when the trial plates are in the mouth and the steel point of the Incisor Path Register is all the way down, it shall trace on the anterior portion of the Horseshoe Plate the movements of the forward point of Bonwill's triangle during lateral move- ments of the mandible. The point should come over the median line of the Horseshoe Plate. The Register should be high enough above the labio-incisal angle of the upper trial plate, so that the dent- ist can plainly see the registering point and the pattern it traces. The registering point is now pushed all the way up and secured