[Assessment of upper jaw extraction versus upper and lower jaw extraction treatment for class II division 1 malocclusion using peer assessment rating index]
- PMID: 16845957
[Assessment of upper jaw extraction versus upper and lower jaw extraction treatment for class II division 1 malocclusion using peer assessment rating index]
Abstract
Objective: To assess the outcome of orthodontic treatment with upper jaw or upper and lower jaw extraction for Class II division 1 malocclusion using the peer assessment rating (PAR) index.
Methods: 28 patients with Class II division 1 were extracted two first premolars or second premolars of upper jaw, and 24 patients were extracted four premolars of upper and lower jaw N. The PAR was applied on pre-and post-orthodontic treatment dental casts for the fifty-two cases.
Results: The upper and lower jaw extraction groups had significantly higher initial PAR scores and the weighted PAR total scores (P<0.05). Although significantly different before treatment, both groups were not statistically different after treatment (P>0.05).
Conclusion: The upper and lower jaw extraction cases showed more severe dental displacement. Both treatment can acquire successful results.
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