【摘要】 目的:探讨自制胶体型牙龈收缩剂(以下简称排龈膏)的排龈效果和安全性。方法:选择2只成年杂种犬的40颗牙作为实验牙。牙体预备后,分为4组,分别用自制排龈膏,Expasyl排龈膏,排龈线和加药(15.5%Fe2SO4溶液)排龈线4种方法排龈处理。处理前后分别用硅橡胶取模并灌制模型,然后通过影像式精密测绘仪测量和分析排龈前后的龈沟宽度和龈缘高度变化,采用SAS6.12软件包进行统计分析。结果:自制排龈膏与Expasyl排龈膏、排龈线、加药排龈线排龈后龈沟宽度的变化无统计学意义(P>0.05)。加药排龈线的排龈前龈缘高度为0.423±0.348,排龈后一周的龈缘高度为0.623±0.278,与其他3组比较均有统计学意义(P<0.05)。结论:低黏度可注射胶体型自制排龈膏与Expasyl排龈膏、排龈线、加药排龈线排龈效果相似。4组排龈材料排龈后,加药排龈线会引起牙龈退缩,自制排龈膏﹑Expasyl排龈膏和排龈线不会引起牙龈退缩。自制排龈膏有一定的临床安全性。更多还原

【Abstract】 PURPOSE:To evaluate the efficiency of self-made paste on gingival retraction in dogs as well as its potential clinical application. METHODS:Forty teeth from two mature dogs were prepared with 0.5 mm wide shoulder in the lip and buccal sides of the teeth,and then divided into four groups randomly. The gingival grooves of the four groups were filled with self-made colloid paste,Expasyl gingival retraction paste,gingival retraction cord,and medicated (15.5% Fe2SO4 solution) gingival retraction cord,respectively. The gingival grooves models before and after gingival retraction were analyzed using the image precise mapper instrument; the gingival width and height of the gingival groove were compared using SAS6.12 software package. RESULTS:The changes of gingival width of the gingival groove before and after gingival retraction were not significant between the four groups. However,the gingival height of the gingival groove in the medicated gingival retraction cord group increased significantly [(0.423±0.348) mm before gingival retraction and (0.623± 0.278) mm after gingival retraction] compared with the other three groups. CONCLUSIONS:The self-made colloid paste for gingival retraction is efficient like Expasyl gingival retraction paste and gingival retraction cord with potential clinical application,while the medicated gingival retraction cord can induce gingival shrinkage.更多还原