两种修复方法对已做根管治疗并单端游离缺失前磨牙折裂的影响

The Effect of Two Repair Methods on Root Canal Therapy and Edentulous Premolar Fracture

目的观察经根管治疗且单端游离缺失的前磨牙只做全冠修复与全冠修复后再做可摘局部义齿修复两种修复方法对其折裂的影响。方法105例患者,共138颗患牙,其中上颌前磨牙63颗,下颌前磨牙75颗;69颗牙只做全冠修复,另69颗牙做全冠修复加可摘局部义齿修复。修复后1、2、3年进行复查,了解患牙折裂情况,并进行统计学分析。结果只做全冠修复的69颗患牙1年复查11颗患牙折裂,2年15颗患牙折裂,3年23颗患牙折裂。而全冠加可摘局部义齿修复的69颗患牙折裂1年复查3颗患牙折裂,2年5颗患牙折裂,3年5颗患牙折裂。两种方法差异有统计学意义(χ2=9.423,P<0.01)。结论全冠修复加可摘局部义齿修复的联合运用可延长经根管治疗且单端游离的前磨牙寿命。

Objective To observe the influence of two different repair methods on root canal therapy and edentulous premolar fracture. One method is full crown restoration, the other one is the combination of full crown and removable partial denture restoration. Method 105 patients with 138 teeth, 63 maxillary premolars and 75 mandibular premolars. 69 teeth restore with full crown. The other 69 restore with the combination of full crown and removable partial denture restoration. Do the follow-up visiting after 1 year, 2 years, 3 years. Record the fracture and do statistical analysis. Results There are 11 premolar fractures after 1 year restoration with full crown, 15 after 2 years and 23 after 3 years. The other team is 3 premolar fractures after 1 year, 5 after 2 years, 5 after 3 years. The two methods is Significant differences（x2 =9.423,P〈0.01）. Conclusion The combination of full crown and removable partial denture restoration extend the service life of root canal therapy and edentulous premolar.