Comparison of the orthodontic efficacy of the self-locking appliance and the ordinary straight wire appliance / 中国医师杂志

ABSTRACT

Objective To compare the orthodontic efficacy of the self-locking appliance and the ordinary straight wire appliance.Methods A total of 144 patients from March 2010 to March 2012 at the Department of Stomatology Orthodontic Surgery,Zhejiang Dongyang City People's Hospital were divided into observation group (n =72) and control group (n =72) according to the random number table.The observation group were treated with the self-locking appliance,and the control group were treated with the ordinary straight wire appliance.Results (1) The number of referral unconventional visits had no statistically significant difference between two groups (U =-1.65,P =0.0990).The number of routine visits of observation group was significantly less than that of the control group (U =-2.80,P =0.0052).(2) The VAS score of observation group was significantly lower than that of the control group (U =-8.47,P =0.0000).Conclusions The orthodontic efficacy of the self-locking appliance is obviously better than the ordinary straight wire appliance,and the former-caused pain is lighter.Therefore,the self-locking appliance is more suitable for orthodontic surgery.