前牙区软组织自我修复效果的实验测量观察

Analysis on self-healing effect of anterior teeth area gingival soft tissue in canine model

在犬的上颌前牙区(右上颌侧切牙、左上颌中切牙)制造残根模型,将牙冠磨至龈缘下约平齐牙槽嵴顶水平,避免磨损牙龈软组织,术后第1、3、4、5周观察其牙龈生长情况,测量龈乳头至邻牙牙尖顶的距离、龈乳头至邻牙牙尖顶的水平面的垂直距离、龈缘中点至邻牙牙尖顶的距离、龈缘中点至邻牙牙尖顶的水平面的垂直距离。利用SPSS软件对测量的实验数据进行线图分析。结果显示术后第4周增生的软组织基本长满残根断面,术后第5周新生的软组织与正常牙龈在颜色、质地上基本一致,测量数据显示在观察周期内牙龈软组织增生的总体趋势是朝着增生方向发展。研究发现牙龈在无损伤的情况下具有一定的自我修复能力,4周时残根周围的牙龈软组织可基本完成修复。

Residual roots model was conducted in the maxillary anterior teeth area of the canine （ right maxillary lateral incisor and left maxillary central incisor） by grinding dental crown to approximate alveolar ridge top level in subgingival margin and avoiding wearing gingival tissue. The growth of gums was observed in the 1, 3, 4, 5 weeks after surgery through measuring the distance between gingival papilla and adjacent regions spire, the vertical dis-tance between gingival papilla and the level of the adjacent regions spire, the distance between the modpoint of gin-gival margin and adjacent tooth spire and the vertical distance between the modpoint of gingival margin and the level of the adjacent regions spire. All the statistical analyses for experimental data were performed by SPSS statistical software. The results showed hyperplasia of the gum tissue in the fourth week after surgery was nearly full of residu-al root fracture, and no color and texture difference was found between the gum tissue in the fifth week after surgery and normal gum. According to data the growth of gum tissue was toward the direction of hyperplasia during the ob-servation period. This study shows that gums have some certain ability of self-healing in the case of no damage, and the residual root tissue can complete self-healing in 4 weeks.