Transactions of the Southern Dental Association (Paperback)

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: the bar C rests, being pressed against it through the action of the spring F on A. The distance that A is moved by E is shown on the millimeter gauge K. G is another adjustable fulcrum-screw which plays against the back of the ramus B, and is easily removed with its supporting frame H, being required only in correcting a bite which is too open or too close. It causes the condyle to move forward and downward when the jaws are separated, which is of no moment in the construction of a denture unless the bite has to Fig. 5. be changed. The bar N is divided at the median line, so that the condylo-occlusal angle of each side may be adjusted independently, as they often vary. An adjustable sliding collar O carries the bite-correcting fulcrum-screw E, which passes through a slot in N. The bows P and M carrying the casts are secured by set- screws Q and R, and are in all cases to be pressed in as far as possible, and should never be moved to correct the occlusion. I is a clamping screw which binds D to the degree-gauge J, D being adjusted at the condylo-occlusal angle of the patient (or the condylo- alveolar angle in an edentulous case), the angle having been ascertained by the use of the facial clinometer as will be described later in this paper, and demonstrated in the clinics. The figure on the degree-gauge J, where it is crossed by the bar D, represents the angle formed by D and M when projected to the point of intersection. The casts are to be so mounted on the loops that the plane of occlusion (alveolar plane) shall be parallel with P and M. In the short movements of mastication, the condyle on the side toward which the jaw is advancing travels forward and downward, on a line which being extended till it intersects the facial line forms at the point of intersection an angle ...