Crown lengthening is one of the most common surgeries in clinical practice. Under the premise of ensuring the biologic width, the adequate crown is exposed by resecting the periodontal soft tissue and (or) hard tissue to meet the prosthodontic and (or) aesthetic requirements. Considering the various advantages of oral laser, such as safe, precise, minimally invasive and comfort, laser has become a promising technology which can be used to improve the traditional crown lengthening. In this review, the principles and characteristics of laser application in crown lengthening, especially in the minimally invasive or flapless crown lengthening will be reviewed. Its pros and cons will also be discussed.
牙冠延长术是口腔临床中最常见的手术之一，通过对牙周软组织和（或）硬组织的切除修整，在保障生物学宽度的前提下暴露足够的牙冠结构以达到稳定的修复或美学要求，常发生在需要口腔多学科联合治疗或美观要求较高的患者中。近年来，激光技术以其较传统牙冠延长术安全、精准、微创、舒适度高等优点在临床应用中得到了越来越多的关注与发展。本文在总结常用口腔激光特点的基础上，对激光辅助牙冠延长术和传统牙冠延长术进行针对性分析，对近年来激光在牙冠延长术中的临床应用，特别是激光微创牙冠延长术的临床应用进行综述。.
Keywords: crown lengthening; laser; minimally invasive therapy.