双尖牙位于磨牙的前端,显露机会较多,在功能及美学上占有较重要的位置。但由于解剖形态、龋病、外伤等原因的影响,常过早的缺损成残根或残冠。在临床上拔牙率很高,传统的活动义齿及固定义齿修复在不同程度上均存在功能恢复不好、不美观等缺点。作者采用桩冠对上颌双尖牙进行美? Bifidus is located in the front of the molar, revealing more opportunities, in function and aesthetics occupy a more important position. However, due to anatomical features, dental caries, trauma and other reasons, often premature defects into residual roots or residual crowns. In clinical practice, the tooth extraction rate is very high. The traditional movable dentures and fixed dentures have some shortcomings such as poor recovery of function and poor appearance in varying degrees. The author uses post crown on the maxillary bicuspid to the United States?