Surgical crown lengthening can reduce the position of the gingival margin, expose health tooth structure, lengthen the clinical crown and favor the denture repair or help to solve aesthetic problems. We conducted surgical corown lengthening operation by piezosurgery in 11 paitnets involving 36 teeth. Health gingiva, stable and coordinatie gingival margin were observed in all cases with all teeth in 6-month follow- up.%牙冠延长术是通过手术的方法,降低龈缘位置、暴露健康的牙齿结构,使临床牙冠加长,从而利于义齿的修复或解决美观问题的一种牙周外科手术.我科采用超声骨刀行牙冠延长术11 例,术后观察6 个月,患牙牙龈健康、稳定、龈缘协调.
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