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目的:比较改良式Hawley保持器与常规Hawley保持器对深覆患者矫治结束后的保持效果。方法:选择36例重度深覆矫治完成病例,随机分为两组,各18例。实验组采用改良式Hawley保持器进行保持,对照组采用常规Hawley保持器进行保持。戴用保持器2年后,制取模型,测量保持前后的PAR指数7项指标。结果:戴用保持器2年后,实验组与对照组在覆指标上有统计学差异(P<0.05),其余各指标无统计学差异。结论:深覆患者经过矫治后深覆容易复发,戴用改良式Hawley保持器可以有效防止深覆的复发。
OBJECTIVE: To compare the effect of modified Hawley and conventional Hawley retainers on the treatment of deep overburden patients. Methods: 36 cases of severe overgrowth were selected to complete the treatment and were randomly divided into two groups of 18 cases. The experimental group was maintained with a modified Hawley retainer and the control group with a conventional Hawley retainer. After wearing the cage for 2 years, the model was made and the PAR index before and after the index was measured. Results: After wearing the cage for 2 years, the experimental group and the control group showed statistically significant differences (P <0.05), while the rest of the indicators showed no significant difference. Conclusion: The deep overburden patients are easy to relapse after correction, and the modified Hawley retainer can effectively prevent the recurrence of deep overburden.