Jahnke P V, Sandifer J B, Gher M E, Gray J L, Richardson A C
Periodontics Department, Naval Dental Clinic, Great Lakes, IL.
J Periodontol. 1993 Apr;64(4):315-22. doi: 10.1902/jop.1993.64.4.315.
Studies have shown partial to complete root coverage of denuded root surfaces with the use of thick free gingival autografts (FGGs) or subepithelial connective tissue autografts (CTGs). The purpose of this study was to determine which technique would result in more predictable root coverage of Miller Class I and II marginal tissue recession defects. Paired defects in 10 patients were randomly selected for treatment with either the FGG or the CTG. With stents as reference points, soft tissue recession was measured with a calibrated probe presurgically and 3 and 6 months postsurgically. No significant differences between paired sites in presurgical defect dimensions were found. One patient was dropped from the study for noncompliance with postoperative instructions. The mean percentage of root coverage for the CTG 3 and 6 months postsurgery for the remaining 9 patients was 78% and 80%, respectively. The mean percentage of root coverage for the FGG was 43% at both periods. The difference in root coverage between the 2 techniques was significant (P < 0.03). Complete root coverage was gained in 5 of 9 CTGs but only in one of 9 FGGs. Both techniques resulted in a significant improvement in keratinized tissue and probing attachment level, with most of the changes having occurred during the first three months postoperatively. Results suggest that the CTG may provide a greater percentage of root coverage than the FGG and that both techniques will effectively increase the width of keratinized tissue.
研究表明，使用厚的游离龈自体移植片（FGG）或上皮下结缔组织自体移植片（CTG）可部分或完全覆盖裸露的根面。本研究的目的是确定哪种技术能更可预测地覆盖米勒I类和II类边缘组织退缩缺损的牙根。随机选择10例患者的成对缺损，分别用FGG或CTG进行治疗。以支架作为参考点，术前、术后3个月和6个月用校准探针测量软组织退缩情况。术前缺损尺寸在成对部位之间未发现显著差异。一名患者因未遵守术后医嘱而退出研究。其余9例患者术后3个月和6个月CTG的平均牙根覆盖百分比分别为78%和80%。两个时期FGG的平均牙根覆盖百分比均为43%。两种技术在牙根覆盖方面的差异具有统计学意义（P<0.03）。9例CTG中有5例实现了完全牙根覆盖，而9例FGG中只有1例。两种技术均使角化组织和探诊附着水平有显著改善，大部分变化发生在术后前三个月。结果表明，CTG可能比FGG提供更高百分比的牙根覆盖，且两种技术均能有效增加角化组织的宽度。
