带翼桩冠在上前牙龈下残根残冠修复中的运用

The application of the post crowns with wings to the restoration of the subgingival residual roots and residual crowns of anterior maxillary teeth

目的:介绍一种上前牙冠折位于龈下>3 mm的桩冠修复方法,探讨位于龈下的上前牙残根、残冠修复中的难点,分析铸造桩核加带翼金属烤瓷冠进行修复的原理。方法:对23例(26个牙)上前牙根面位于超过龈下>3mm左右的残根、残冠,经根管治疗后,采用铸造桩核加两侧邻牙带翼金属烤瓷熔附金属冠修复。结果:经3个月至5年的临床观察,修复冠稳固,固位和抗力效果良好。结论:根面位于超过龈下3mm或冠根斜折的上前牙残根、残冠可完全保留,进行带翼桩冠修复。外观和咀嚼功能恢复良好。

Objective ：To presents a new way of constructing post crowns for the anterior maxillary teeth which had the subginginval crown fracture more than 3 mm. To discusse the difficulties in the restoration of the subgingival residual roots and residual crowns of anterior maxillary teeth, and to explore the principles of the new restoration by the casting post-core and the porcelain fused mental crowns with wings. Methods： 23 patients（26 teeth） which had crown fracture more than 3 mm under the gingival were enrolled in this study. After those residual roots and crowns were endodontically treated following the conventional root canal therapy, the casting post-core and the porcelain fused mental crowns with wings were applied to reconstructing those missing crowns. Results： After 3 months to 5 years clinic observation, restored crowns were still stable with good retention and fracture resistance. Conclusion ： Those residual roots and crowns can be preserved by this innovative way and can also acquire satisfactory effects in esthetics and functions.