Int J Periodontics Restorative Dent. 2022 Sep-Oct;42(5):649-656. doi: 10.11607/prd.5706.
The aim of this retrospective study was to evaluate the effect of free gingival grafts (FGGs) at adjacent mandibular molar implants and to compare the clinical outcomes between the first molar (M1) and second molar (M2) sites. Twenty-one patients with 44 implants were included. At the 3-year follow-up, the mean increase in the keratinized mucosa width (KMW) was 2.35 ± 1.33 mm, and the mean KMW shrinkage rate was 58% ± 23%. M1 sites showed a significantly greater increase of KMW and less graft shrinkage than M2 sites (M1: 2.87 ± 1.40 mm and 49% ± 24%, M2: 1.83 ± 1.06 mm and 66% ± 19%, P < .05). The results show that using FGG to increase KMW in mandibular molar implants was a predictable treatment method, and M1 sites were associated with a greater KMW increase than M2 sites.
本回顾性研究旨在评估游离龈瓣移植（FGG）对下颌磨牙种植体周围的影响，并比较第一磨牙（M1）和第二磨牙（M2）位点的临床效果。共纳入 21 名患者的 44 个种植体。3 年随访时，角化黏膜宽度（KMW）的平均增加量为 2.35 ± 1.33mm，平均 KMW 退缩率为 58% ± 23%。M1 位点的 KMW 增加量明显大于 M2 位点，且移植体退缩率小于 M2 位点（M1：2.87 ± 1.40mm 和 49% ± 24%，M2：1.83 ± 1.06mm 和 66% ± 19%，P <.05）。结果表明，使用 FGG 增加下颌磨牙种植体周围的 KMW 是一种可预测的治疗方法，且 M1 位点的 KMW 增加量大于 M2 位点。
