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Research of treatment effects of reformed pendulum and upper lip bumper therapy on crowed malocclusion in permanent dentition.

MU Ming-kui,LU Xiao-li,LIU Yang,ZHAN Wang,HOU Lu.Department of Othodontics,The Second Hospital Affiliate to Harbin Medical University,Heilongjiang Harbin 150086,China.  
Objective:To evaluate the treatment effects of reformed pendulum and upper lip bumper therapy on crowed malocclusion in the beginning of permanent dentition.Method:21patients with severe crowed malocclusion in the beginning of permanent dentition were treated with reformed pendulum and upper lip bumper,Cephalometric analysis was performed with pre-treatment and post-treatment cephalograms.Paired t-test conducted to assess the treatment effects.Result:Teech moving and alveolar rebuilding is the main change after the treatment by reformed pendulum and upper lip bumper.The improvement of overjet is achieved with foreward of A point,SNA increase 3.68° and the upper molar was distalized by 2.96 mm.Conclusion:severe crowed malocclusion in the beginning of permanent dentition can be treated successful by reformed pendulum and upper lip bumper.
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