A Primary Study Of The Occlusal Function On Class â…¡ Division1Malocclusion Before And After Orthodontic Treatment

Objective:Compare the occlusal function change of patients with Class II division1malocclusion before and after orthodontic treatment, to evaluate the influence of orthodontic treatment on occlusal contact change, which incorporated with the data of foreign and domestic researchers, to comparatively analyze the reliability for occlusal reconstruction of patients with Class II division1malocclusion and the instructional significance for clinic on Class II division1malocclusion.Methods:T-scan II system4.02was used to record total occlusal force (TOF), asymmetry index of occlusal force (AOF), center occlusal force (COF), maximal movement of COF (MMCOF), time of occlusion (TO) before and after orthodontic treatment of30Class II Division1malocclusion patients(age averaged12.33years) with integrity dentition in the maximum intercuspation(MIP). The statistical software SPSS13.0was chosen to analyse.Students t-test was used to determine if there were significant differences between pre-treatment and post-treatment of patients with Class II division1malocclusion.Results:After orthodontic treatment, TOF was increased gradually, and there was significant between before and after orthodontic treatment, preoperative level (P<0.05); COF was in the grey ellipse, which was much closer to the center of grey ellipse and maxillary medial line to the preoperative level (P<0.01); AOF、MMCOF、TO were lower after treatment preoperatively, and significant difference were observed(P<0.01).Conclusions:The result suggest that, premature contact, occlusal interferences and other unbalanced occlusal diseases may exist in Class II Division1malocclusion, after orthodontic treatment, the occlusal force and balance on Class II division1malocclusion patients can be improved; The occlusal contact the T-scan II system reflects are objective、exact and precise, the measurement results of T-scan II could be the marker for the clinic.