Periodontics Department, School of Dentistry, Semnan University of Medical Sciences, Semnan, Iran.
Periodontics Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Clin Oral Implants Res. 2022 May;33(5):472-481. doi: 10.1111/clr.13907. Epub 2022 Feb 28.
Free gingival graft (FGG) is the most effective way to increase the apico-coronal width of the keratinized mucosa. In case of limited donor tissue, the accordion technique can be used. This study compared FGG for dimensional and clinical changes using accordion and conventional methods.
Ninety-four implants with keratinized tissue deficiency (<2 mm) were randomly assigned to treatment with accordion (49 implants) and conventional (45 implants) FGG. Endpoints including apico-coronal keratinized tissue width, vertical shrinkage, vestibular depth, probing depth, bleeding on probing, and plaque index were measured. The graft harvesting and recipient bed preparation method were similar in the two groups, and the only difference was the graft length. FGG was harvested with a length 40% shorter than the mesiodistal length of the recipient area in the accordion method and as much as the recipient area in the conventional method.
vertical graft shrinkage 1, 3, and 6 months following conventional graft placement was 12.04 ± 14.99, 17.12 ± 20.40, and 23.29 ± 24.63 percent, respectively. In the accordion graft group, the shrinkage was significantly greater with 30.10 ± 16.12, 36.99 ± 15.51, and 43.75 ± 18.78 percent at 1, 3, and 6 months, respectively (p-value < .001). Other factors did not show a clinically significant difference between the two groups.
Comparison of vertical shrinkage changes shows that the shrinkage rate in the accordion group is significantly higher than the conventional group.
IRCT20190721044296N1 (Evaluation of dimensional changes of peri-implant attached mucosa following the treatment of free gingival graft by conventional and accordion methods; randomized clinical trial two-arm parallel).
游离龈瓣移植（FGG）是增加角化黏膜的冠根向宽度最有效的方法。在供区组织有限的情况下，可以使用风琴技术。本研究比较了使用风琴和传统方法进行 FGG 时的尺寸和临床变化。
94 个角化组织不足（<2mm）的种植体随机分为使用风琴（49 个种植体）和传统（45 个种植体）FGG 的治疗组。测量终点包括角化组织的冠根向宽度、垂直收缩、颊侧龈沟深度、探诊深度、探诊出血和菌斑指数。两组的移植物采集和受区床准备方法相似，唯一的区别是移植物的长度。在风琴法中，FGG 的采集长度比受区的近远中长度短 40%，而在传统法中，FGG 的采集长度与受区一样长。
传统 FGG 放置后 1、3 和 6 个月，垂直移植物收缩率分别为 12.04±14.99%、17.12±20.40%和 23.29±24.63%。在风琴移植物组中，分别为 30.10±16.12%、36.99±15.51%和 43.75±18.78%，在 1、3 和 6 个月时的收缩率明显更大（p 值<.001）。其他因素在两组之间没有显示出临床显著差异。
比较垂直收缩变化，发现风琴组的收缩率明显高于传统组。
IRCT20190721044296N1（比较传统和风琴方法治疗游离龈瓣移植后种植体附着黏膜尺寸变化的随机临床试验两臂平行）。
