硬質レジン歯の臨床的評価

概要

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The occlusal surface of a complete denture must be formed in harmony with mandibular movement and is adjusted on an articulator. However, occlusal facets are enlarged and their forms change after insertion of the denture, especially for acrylic resin teeth. Recently, artificial hard resin teeth, whose core is made of acrylic resin and surface is covered by composite resin, were developed, and drawing attention of the clinical dentistry. This type of resin teeth is superior in luster and transparency. The surfaces feel hard when they are ground to get balanced occlusion. Observation of complete dentures with this artificial hard resin teeth was made, and changes by abrasion in projected area of occlusal facet to occlusal plane, discoloration of the teeth were examined. The hard resin teeth used in this investigation were Endura by Shofu Co. and Duracross by Nisshin Co. The results were as follows : 1. Projected area indexes of occlusal facets of Endura for 1st, 3rd, 5th month were 108±6, 116±8, 119±10, respectively. Those of Duracross were 105±6, 116±5, 118±6, respectively. 2. There were no significant statistical difference between Endura and Duracross. Long term examination should be performed to evaluate these hard resin teeth. 3. Discoloration to yellow at the cervical area, or dark brown for the whole surface was found for Endura at 1st month, and no discoloration was seen for Duracross.
九州歯科学会の論文
1992-10-25