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[PAR index of adolescents with congenital missing teeth pre- and post-orthodontic treatment]
Xiao-Ge Zhang1, Ning Huang, Yang-Xi Chen
1Department of Orthodontics, West China Stomatological Hospital, Sichuan University, Chengdu 610041, China.
Objective:
To assess the outcome of orthodontic treatment for adolescents with congenital missing teeth using the PAR (Peer Assessment Ration) index.
Methods:
The PAR index was adopted to evaluate and compare the teeth arrangement, molar occlusion, overjet, overbite and centerline condition of 20 adolescents with congenital missing teeth before and after orthodontic treatments.
Results:
The initial PAR scores and weighted PAR total scores decreased significantly after Orthodontic treatments (P < 0.01), except for the centerline. The PAR total scores decreased by 14.25 +/- 7.91 (80.90% +/- 11.09%). The weighted PAR total scores decreased by 15.45 +/- 8.16 (75.34% +/- 18.41%).
Conclusion:
PAR index can well reflect the improvement of occlusion characters by orthodontic treatment for adolescents with congenital missing teeth. But further improvement is needed for clinical application.
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