CAJ | 학술논문

目的：比较不同类型残冠、残根行牙冠延长术后的临床疗效及影响因素。方法选取来我科就诊,需行牙冠延长术的96名患者,行牙冠延长术的残冠、残根120颗。根据残冠残根形成的原因分为2组,折裂组和龋坏组。记录并比较2组牙体缺损所累及的牙面,及术前断缘的探诊深度,观察术后4~6周根断面暴露情况。结果2组缺损累及牙面不同,折裂组多发生在腭(舌)侧,龋坏组多发生在邻面或唇(颊)侧( P<0．01)；折裂组术前断缘的探诊深度明显高于龋坏组(P<0．01)；62颗牙因折裂行冠延长术后满意者34颗牙(54．8%),58颗牙因龋坏行冠延长术后满意者48颗牙(82．8%),差异有统计学意义(P<0．01)。结论牙冠延长术的临床疗效受多种因素影响,龋源性冠延长术的临床疗效明显好于折裂性冠延长。
목적：비교불동류형잔관、잔근행아관연장술후적림상료효급영향인소。방법선취래아과취진,수행아관연장술적96명환자,행아관연장술적잔관、잔근120과。근거잔관잔근형성적원인분위2조,절렬조화우배조。기록병비교2조아체결손소루급적아면,급술전단연적탐진심도,관찰술후4~6주근단면폭로정황。결과2조결손루급아면불동,절렬조다발생재악(설)측,우배조다발생재린면혹진(협)측( P<0．01)；절렬조술전단연적탐진심도명현고우우배조(P<0．01)；62과아인절렬행관연장술후만의자34과아(54．8%),58과아인우배행관연장술후만의자48과아(82．8%),차이유통계학의의(P<0．01)。결론아관연장술적림상료효수다충인소영향,우원성관연장술적림상료효명현호우절렬성관연장。
Objective To investigate the clinical effect of crown lengthening surgery of different kinds of residual crowns and roots and its influencing factors. Methods A total of 120 residual crowns and roots of 96 patients were selected for crown lengthening in this study. The 120 teeth were divided into two groups according to the reasons that lead to residual crowns and roots,group F ( caused by fracture) and group C ( caused by caries) . The locations of defects and probing depths of subgingival margin of the residual crowns and roots were recorded and compared before surgery. The patients were followed up for 4 to 6 weeks after surgery and the clinical effects evaluated and compared. Results In group F,the teeth defects were mainly located on palatal( lingual) sides,and in group C,the teeth defects were located on proximal or labial ( buccal ) sides. Probing depths of teeth margin before surgery in group F were much higher than those in group C(P<0. 01). Thirty-four teeth(54. 8%) in group F (total 62) and 48 teeth (82. 8%) in group C (total 58)obtained satisfactory effect(P<0. 01). Conclusion Residual crowns and roots caused by caries could achieved better clinical effect than those caused by fracture for crown lengthening.