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[Changes in mastication efficiency before and after orthodontic treatment of adult skeletal angle III malocclusion]
Qian Yang1, Cun-hui Fan, Xin-qiang Liu
1Department of Orthodontics, College of Stomatology, Qingdao University, Qingdal 266003, Shandong Province, China.
Purpose:
To evaluate the changes of mastication efficiency pre- and post-treatment in adult skeletal Angle III malocclusion, and to analyze the effect of malocclusion on mastication efficiency.
Methods:
Masticatory efficiency was analyzed in 60 patients with adult skeletal Angle III malocclusion pre- or post-orthodontic treatment and 30 adults with normal occlusion as controls. Masticatory efficiency was measured by means of a spectrophotometer using Gelatin. SPSS 10.0 software package was used for Student's t test and step-wise regression.
Results:
(1) Significant difference of masticatory efficiency was found among the three groups (P < 0.001). Multiple comparision showed significant difference among pre-treatment group, post-treatment group and normal controls (P < 0.05). (2) Step-wise regression results suggest that overjet and mandibular prognathism were closely related to masticatory efficiency in both pre- and post-treatment group.
Conclusion:
Orthodontic therapy can improve masticatory function in patients with malocclusion.
