Sin Yeon-Woo, Chang Hee-Yung, Yun Woo-Hyuk, Jeong Seong-Nyum, Pi Sung-Hee, You Hyung-Keun
Department of Periodontology, Wonkwang University School of Dentistry, Iksan, Korea.
Department of Periodontology, Wonkwang University School of Dentistry, Iksan, Korea. ; Wonkwang Dental Research Institute, Wonkwang University School of Dentistry, Iksan, Korea.
J Periodontal Implant Sci. 2013 Dec;43(6):283-90. doi: 10.5051/jpis.2013.43.6.283. Epub 2013 Dec 31.
The concept of gingival biotype has been used as a predictor of periodontal therapy outcomes since the 1980s. In the present study, prospective and controlled experiments were performed to compare periodontal pocket depth (PPD) reduction and gingival shrinkage (GSH) after scaling and root planing (SRP) according to gingival biotype.
Twenty-five patients diagnosed with chronic periodontitis participated in the present study. The PPD and GSH of the labial side of the maxillary anterior teeth (from the right canine to the left canine) were evaluated at baseline and 3 months after SRP. Changes in the PPD following SRP were classified into 4 groups according to the gingival thickness and initial PPD. Two more groups representing normal gingival crevices were added in evaluation of the GSH. The results were statistically analyzed using the independent t-test.
In the end, 16 patients participated in the present study. With regard to PPD reduction, there were no significant differences according to gingival biotype (P>0.05). Likewise, sites with a PPD of over 3 mm failed to show any significant differences in the GSH (P>0.05). However, among the sites with a PPD of under 3 mm, those with the thin gingival biotype showed more GSH (P<0.05).
PPD changes after SRP were not affected by gingival biotype with either shallow or deep periodontal pockets. GSH also showed equal outcomes in all the groups without normal gingival crevices. The results of SRP seem not to differ according to gingival biotype.
自20世纪80年代以来，牙龈生物型的概念一直被用作牙周治疗效果的预测指标。在本研究中，进行了前瞻性对照实验，以比较根据牙龈生物型进行龈上洁治和根面平整（SRP）后牙周袋深度（PPD）的减少和牙龈退缩（GSH）情况。
25名被诊断为慢性牙周炎的患者参与了本研究。在基线时以及SRP后3个月，对上颌前牙唇侧（从右尖牙到左尖牙）的PPD和GSH进行评估。根据牙龈厚度和初始PPD，将SRP后PPD的变化分为4组。在评估GSH时增加了另外两组代表正常龈沟的情况。结果采用独立t检验进行统计学分析。
最终，16名患者参与了本研究。关于PPD减少，根据牙龈生物型没有显著差异（P>0.05）。同样，PPD超过3mm的部位在GSH方面也没有显示出任何显著差异（P>0.05）。然而，在PPD小于3mm的部位中，牙龈生物型薄的部位显示出更多的GSH（P<0.05）。
无论是浅牙周袋还是深牙周袋，SRP后的PPD变化均不受牙龈生物型的影响。在所有没有正常龈沟的组中，GSH也显示出相同的结果。SRP的结果似乎不因牙龈生物型而异。
