摘要
目的观察改良牙冠延长术的手术疗效，初步探讨可能影响术牙牙周健康的因素。方法对17例患者、共20颗患牙实施改良牙冠延长术并完成修复术后1—6年的长期追踪（探诊深度每颗牙检测6个位点，共120个位点；出血指数每颗牙检测颊、舌面2个位点，共40个位点），对比分析术牙与同颌对侧同名天然牙及近远中相邻天然牙的牙周状况，并对影响术牙牙周健康的各项因素进行统计学分析。结果术后17例患者中1例发生根折，1例对磨牙金属修复体颜色不满意，其他15例患者对术牙的美观和功能均非常满意；术牙仅有4％（5／120）的位点牙周探诊深度为4mm，其余位点探诊深度均≤3mm；术牙83％（33／40）的颊舌面位点存在不同程度的探诊出血，但术牙与同颌对侧同名天然牙及近远中相邻天然牙的菌斑指数、探诊深度、探诊后出血、松动度差异均无统计学意义；修复体冠缘位置与牙龈出血指数呈高度负相关（r=-0．742）；菌斑指数与牙龈出血指数呈中度正相关（r=0．480）。结论改良牙冠延长术疗效较好，是保留残根残冠的一种可行的牙周手术；术后修复体冠缘位置可能是影响术牙牙周健康的主要因素。
Objective To observe the effect of modified surgical crown lengthening procedure and discuss the factors which could affect the periodontal health of the operated teeth. Methods Seventeen patients, a total of 20 teeth,who received the modified crown lengthening surgery were recruited ii a retrospective study （1-6 years）. The periodontal status of the operated teeth was compared with th~ adjacent and the contralateral natural teeth respectively. Results One out of seventeen patients appeare（ root fracture after surgery, one patient wasn＇t satisfied with the color of the molar＇s metal crown, other fifieer patients were satisfied with the esthetics and function of the teeth. The sites where probing depth was 4 mn just accounted for 4% （5/120） of the operated teeth, and the probing depth of the other sites was less thin or equal to 3 ram. Although 83% （33/40） of buccal and lingual sites of the teeth exhibited various degreen of bleeding index, the periodontal indices of the operated teeth and the adjacent teeth. The position of the crown margin had a significantly negative correlation with the bleeding index （r = -0. 742）, and the plaque index was moderately correlated with the bleeding index （ r = 0. 480）. Conclusions The modified surgiea crown lengthening indicated a good effect, which could be an alternative method to save the residual erowl and root. The position of crown margin might be the main factor which influences the periodontal health the teeth.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2012年第4期203-207,共5页
Chinese Journal of Stomatology
关键词
牙冠伸长术
治疗结果
回顾性研究
Crown lengthening
Treatment outcome
Retrospective studies
