圆锥形套筒冠固位体基牙牙周的微生物学研究

目的:探讨圆锥形套筒冠固位体对基牙牙周组织及牙周四类细菌生长的影响。方法:对18例同侧5,6缺失,4,7作为基牙采用圆锥形套筒冠修复患者,记录了修复后即刻,修复后1个月,修复后3个月,修复后6个月四个时段,基牙4的菌斑指数(PLI)、牙龈指数(GI)、牙龈出血指数(GBI)、探诊深度(PD)的变化情况;采用产黑菌、放线菌、具核梭杆菌及链球菌的选择性培养基对龈下菌斑标本进行分离培养,计数。同时以同颌对侧同名牙为对照。结果:发现圆锥形套筒冠固位体基牙牙周各指标四个时段纵向比较,差异无显著性;横向与同颌对侧同名牙比较,差异也无显著性。结论:圆锥形套筒冠固位体对基牙牙周影响较小,修复后六个月内对基牙牙周组织的健康无不良影响。

Microbiological Study on Abutment Periodontium of the Telescope Crown Retainer

Objective To study the influence of telescope crown retainer to the abutment periodontium.Methods 18 abutments (second premolar) of telescope crown restoratives (first molar missing, use second premolar and second molar as abutments) were evaluated as to their Plaque Index (PlI), Gingival Index (GI), Probing Depth (PD), Sulcus Bleeding Index (SBI) and bone loss. Subgingival plaque samples were taken and culture method was used for detection of Bacillus megatherium, F.nucleatum, Streptococci, Actinomyces.Use the contralateral same name teeth in the same arch as contral group. They all were investigated four times, after restorative immediately, 1 month later, 3 month later, and 6 month later.Results From the abutment periodontium of telescope crown, all four period of time, GI, PlI, SBI, PD and microbial results showed no significant difference with the contral teeth.Conclusion The telescope crown retainers have little influence to the periodontium of the abutments.