预成钛合金螺纹桩保留残根的临床修复观察

Survival of endodontically treated teeth restored with titanium screw post

目的观察钛合金螺纹桩对残根残冠的修复效果。方法对2002年~2009年5月份期间采用钛合金螺纹桩加双固化树脂核修复的病例进行复诊观察并用预定标准评价修复效果。根据患牙的牙位、余留牙体组织量、桩与牙根的直径比及桩在根管内的密合程度对复诊的病例进行分组比较。结果复诊病例共40例,有49颗修复牙,门诊复诊病例23例共25颗修复牙。失败病例中桩折断两例,桩脱落三例。失败病例均发生在余留牙体组织量不理想组。结论螺纹桩在余留牙体组织量理想的情况下可以获得满意修复效果,在牙体缺损较多的情况下修复效果欠佳。

Objective This retrospective study investigated the clinical effectiveness of tapered titanium screw posts in combination with dual-cure composite resin core material in endodontically treated teeth.Methods The study population comprised 40 patients and 49 endodontically treated teeth,with restored by the post-and-core technique.Groups were defined based on location of restored teeth,various degrees of hard-tissue loss,post diameter,post length and post adaptation in the prepared canal.The restorations were examined clinically and radiologically.Results 23 maxillary anterior teeth,7 mandibular anterior teeth and 19 premolars were included.There were no failure in the group with desirable remaining hard-tissue.During the evaluation period,five post-and-core restorations failed.Failure mode was post debonding（three cases） and post fracture（two case）.Conclusion For titanium threaded post and dural core build-up materials,clinical performance was satisfactory.Survival was higher for endodontically treated teeth with desirable remaining hard-tissue.