摘要种植位点角化黏膜不足是常见的临床问题。虽然角化黏膜宽度是否影响种植修复的远期成功仍然存在争议，但种植体周围角化黏膜宽度不足2 mm增加了局部菌斑堆积、软组织炎症及黏膜退缩的风险已成为共识。游离龈移植术是目前种植位点角化黏膜增宽术的金标准，临床上其应用存在一定的技术敏感性。因此，本文阐述游离龈移植术的意义及疗效、手术时机、常规手术步骤与方法、常见并发症以及游离龈移植术的改良方法，以期为临床应用提供参考。

abstractsInsufficient keratinized mucosa is a common clinical problem. Although there is no consistent data on the long-term success of implant restorations relative to the presence or absence of peri-implant keratinized mucosa, it is widely accepted that the presence of keratinized mucosa width<2 mm is associated with increased biofilm accumulation, soft-tissue inflammation, and mucosal recession. Free gingival graft (FGG) is the standard surgical intervention for augmenting the width of keratinized gingiva. However, the clinical application of FGG is technique-sensitive. Therefore, this article describes the significance and efficacy, surgical timing, conventional procedures and techniques, common complications, as well as some modified approaches of the FGG, aiming to provide guidelines for its clinical application.