一、前言 牙列缺损是指牙列中牙齿的部分缺失。牙列缺损的分类是研究和提高牙列缺损临床修复治疗学的理论基础。一个理想的牙列缺损分类法将会具体有效地指导临床修复治疗的设计、病例归类、记录、分析和统计工作,以及指导教学和科研工作的进行。牙列缺损分类法自1925年美国Kennedy氏首次提出 First, the foreword Dentition defect refers to the dentition part of the missing teeth. The classification of dentition defects is to study and improve the theoretical basis of clinical repair of dentition defect. An ideal dentition defect classification method will guide the design, case classification, recording, analysis and statistics of clinical repair and treatment as well as the teaching and research work effectively and effectively. Dentition defect classification since the United States Kennedy's first proposed in 1925