. A manual of mechanical dentistry and metallurgy . tained /// situ by impinging slightly upon the natural teethwith which it comes in contact. As Dr. Kingsley says of this, accuracy of adaptation anddehcacy in form are all that is essential in such cases, andthe restoration of speech will follow. Obturator for Soft Palate. —The construction of an obtu-rator for the soft palate is much more complicated. Quot-ing Dr. Kingsley, the necessity for a variation in the planwill be found in the anatomical fact of the constant muscular 120 MECHANICAL DENTISTRY AND METALLURGY. action of the soft palate,
. A manual of mechanical dentistry and metallurgy . tained /// situ by impinging slightly upon the natural teethwith which it comes in contact. As Dr. Kingsley says of this, accuracy of adaptation anddehcacy in form are all that is essential in such cases, andthe restoration of speech will follow. Obturator for Soft Palate. —The construction of an obtu-rator for the soft palate is much more complicated. Quot-ing Dr. Kingsley, the necessity for a variation in the planwill be found in the anatomical fact of the constant muscular 120 MECHANICAL DENTISTRY AND METALLURGY. action of the soft palate, which would not permit, withoutirritation, the presence of an immovable fixture. This is contrived with a joint that will permit the partattached to the teeth to remain stati()nar3\ while the obtu- FiG. rator proper is carried up or down as moved by the muscles(see Fig. 72). The joint, a, should occupy the positionof the junction of the hard and soft palates. The joint andprincipal part of the appliance is made of gold, the obtura-tor of vulcanite. The projection, b, lies like a flange uponthe superior surface of the palate and sustains it; otherwise Fig. 75.
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