外伤致上前牙冠根折的核桩冠修复

目的探讨前牙外伤致冠根折牙根的保留及修复方法.方法 22例共33颗外伤冠根折上前牙,其腭侧断端均位于龈缘4 mm以下,通过高频电刀腭侧牙龈成形并完成根管治疗,采用钛合金或金合金核桩冠修复.结果所有患牙在修复后短期内均取得理想的外形和功能,随访0.5～3.0年,牙龈无红肿、萎缩,无牙周袋形成,修复体无松动,X线片示牙周及根尖均无异常.结论对于外伤冠根折前牙,经牙龈成形,采用钛合金或金合金核桩冠修复可取得满意效果.

Study on the Restoration of Post-core Crown for Injured Premaxillary Teeth Following Crown-root Fracture

Objective To study the reservation and restoration of premaxillary teeth following crown-root fracture due to injuries. Methods 33 injured premaxillary teeth of 22 patients were treated. The palatal broken ends of all crown-root fracture locate more than 4 mm below gum margin. High frequency electricity knife was used to shape palatal gum and mot canal therapy were accomplished before restoration. Then, post-core crown of titanium alloy or gold alloy was applied to repair these teeth. Results All treated teeth achieve perfect externality and function. In the pericd of 6 months to three years post-operation follow up, all patients had no symptoms of gingival swelling, atrophy and periodontal pocket. X-my examination did not show any abnormality in the pefidentium and alveolar ridge. Conclusion The restoration of post-core crown using titanium alloy or gold alloy after gingivoplasty can get satisfactory result in injured premaxillary teeth following crown-root fracture cases.