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前牙的折裂缺损,变色牙,小牙畸形等,是口腔科常见病,患者往往迫切要求治疗修复。目前可供前牙修复的材料种类很多,但都有许多局限性。聚碳酸酯冠是近几年出现的新材料,经过临床使用,具有较高的抗压强度和抗弯度,状态逼真,美观,易操作等优点。作者应用聚碳酸酯冠进行了205颗前牙的修复,收到良好的效果。资料与方法 1.病例选择:1991～1993年因各种原因引起的前牙牙冠折裂缺损,前牙牙釉质发育不全加缺损,前牙小牙畸形和前牙间隙大于4mm以上,共123人205颗牙齿。其中男92人,女31人。中切牙131颗(63.9％)、侧切牙43颗(20.97％)、尖牙31颗(15.12%)。所修复的牙齿均为上前牙,为正中咬(牙合)位。 2.材料:所使用的村料是美国3M公司的Ion—聚碳酸酯成品齿冠。分为中切牙,侧切牙,尖牙三类共40种型号进行选择。粘固剂为无酸水门汀,氧化锌丁香水门汀。
Fracture of the anterior defect, discolored teeth, small tooth deformity, is a common disease in dentistry, patients often urgently require treatment and repair. There are many different types of materials available for anterior teeth restoration, but all have many limitations. Polycarbonate crown appears in recent years, new materials, after clinical use, with high compressive strength and bending resistance, the state of lifelike, beautiful, easy to operate and so on. The author applied polycarbonate crown 205 anterior teeth repair, received good results. Materials and Methods 1. Case Selection: From 1991 to 1993 for a variety of reasons caused anterior crown fracture, anterior tooth enamel hypoplasia plus defects, anterior small tooth deformity and anterior gap greater than 4mm, a total of 123 205 Teeth. Among them, there are 92 males and 31 females. There were 131 (63.9%) incisors, 43 (20.97%) incisors and 31 (15.12%) canines. The restoration of the teeth are the upper anterior teeth, the median bite (occlusal) bit. 2. Material: The material used in the village is the United States 3M's Ion-polycarbonate crown. Divided into central incisor, lateral incisor, canine a total of 40 kinds of models to choose from. Cement is acid-free cement, zinc oxide lilac cement.