Li Na, Liu Wei-cai, Zhang Yan, Han Dong-wei, Wang Yi-jun, Hu Wen-qi
Department of Prosthodontics, Huangpu Dental Clinic, Shanghai 200002, China.
Shanghai Kou Qiang Yi Xue. 2010 Apr;19(2):187-91.
To evaluate the efficiency of self-made paste on gingival retraction in dogs as well as its potential clinical application.
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.
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 + or - 0.348) mm before gingival retraction and (0.623 + or - 0.278) mm after gingival retraction] compared with the other three groups.
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. Supported by Research Fund of Science and Technology Bureau of Huangpu District,Shanghai.
评估自制糊剂对犬牙龈退缩的效果及其潜在临床应用价值。
选取两只成年犬的40颗牙齿，在牙齿唇面和颊面制备0.5毫米宽的肩台，然后随机分为四组。四组牙龈沟分别填充自制胶体糊剂、Expasyl牙龈退缩糊剂、牙龈退缩线和含药（15.5%硫酸亚铁溶液）牙龈退缩线。使用图像精密测绘仪分析牙龈退缩前后的牙龈沟模型；使用SAS6.12软件包比较牙龈沟的牙龈宽度和高度。
四组牙龈退缩前后牙龈沟牙龈宽度变化不显著。然而，与其他三组相比，含药牙龈退缩线组牙龈沟的牙龈高度显著增加[牙龈退缩前为（0.423±0.348）毫米，牙龈退缩后为（0.623±0.278）毫米]。
自制牙龈退缩胶体糊剂与Expasyl牙龈退缩糊剂和牙龈退缩线效果相当，具有潜在临床应用价值，而含药牙龈退缩线可导致牙龈收缩。由上海市黄浦区科学技术局科研基金资助。
