采用PAR指数评价安氏Ⅲ类错畸形矫治效果研究

Study of PAR index applied to estimating the correct effect of class Ⅲ malocclusions

目的采用PAR指数对安氏Ⅲ类错畸形的矫治效果进行评价。方法安氏Ⅲ类错畸形患者60例,对其矫治前后的记存模型进行PAR指数测量、分析及疗效评价。结果矫治后各评估项目分值均低于矫治前,差异有统计学意义(P<0.05)。矫治后接近理想53例,可以接受7例,无不能接受患者。牙关系无改善或变坏的例数为0,改善12例,极大改善48例。结论安氏Ⅲ类错畸形病情复杂,其矫治过程的影响因素主要表现在牙齿错位、反覆盖、中线不调等方面,但只要合理设计矫治方案,患者积极配合,都能获得良好的矫治效果。

Objective Using PAR index to estimate the correct effect of class Ⅲ malocclusions.Methods 60 cases were chosen,to make PAR index determination,analysisi,as well as the efficacy estimation.Results After correction,the score of each estimation item was lower than thaose before treatment,and the difference was statistically significant（P0.05）.After correction,53 cases were near perfect,7 cases were acceptable,and none was unacceptable.None received a non-response or depraved occlusion,while 12 cases improved,48 cases even had a big improvement.Conclusion Class ⅢClass Ⅲ malocclusions is complex,with many influencing actors,such as tooth dislocation,anti-covered midline of adjustment,and so on,which affect the correction process.But as long as the clinicians design rational treatment programs,and patients can cooperate actively,it is sure to get good treatment effect.