4865例口腔正畸病例临床分析

目的 分析口腔正畸患者错He畸形类型和年龄构成。方法 以长沙市口腔医院收治的4865名口腔正畸病例为研究对象。按Angle分类法错He类型及年龄构成。结果 错He类型为安氏I类42.80%、安氏Ⅱ类38.64%、安氏Ⅲ类18.5%。年龄构成乳牙期6.45%、替牙期8.69%、恒牙期（12－18岁）66.70%、成人期（＞18岁）为18.5%。结论 要求正畸治疗患者的错He类型以安氏Ⅰ类和Ⅱ类最多，年龄构成以恒牙期为主，成人正畸患者有上升趋势。

The proportion of malocclusion types and the ratio of different age group an investigation of 4865 cases

Objective To investigate the proportion of different maloulusion types and the ratio of different age group. Methods 4865 cases attending Orthodontic Department of ChangSha stomatological hospital from Jan . 1998 to Dec. 2002 were divided into four age groups: deciduous dentition group,mixed dentition, permanent dentition group (12- 18) and adult dentition group. The proportion of maloclusion types was evaluated by Angle classification. Results The proportion of 4865 cases malocclusion was respectively 42.86% (AI), 39.64% (All) and 18. 50% (AIII). The ratio of four groups was respectively 6.45%(deciduous dentition),8.69%(Mixed dentition),66. 70%(permanent dentition 12-- 18),and 18.15% (adult dintition). Conclusion The results suggested that the main malocclusion is AI and All, and that the ratio of the permanint dintition (12--18)group is most high in four groups. Adult patients had obviously increased.