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对84例恒牙期错患者矫治前后咀嚼效率进行测定，其统计结果显示：全部病例矫治后比矫治前的咀嚼效率有显著改善（P＜0．01）。矫治前后男女性别比较两组咀嚼效率均无显著性差异（P＞0．05）。Ⅰ类错矫治前后咀嚼效率无显著性意义（P＞0．05）；Ⅱ、Ⅲ类错及个别前牙反矫治后咀嚼效率均有显著性提高。拔牙组矫治前后咀嚼效率无显著性差异（P＞0．05）；不拔牙组矫治后咀嚼效率则有显著性提高（P＜0．01）。
The masticatory efficiency of 84 patients with permanent dentition before and after orthodontic treatment were measured. The statistical results showed that the masticatory efficiency of all the patients after orthodontic treatment was significantly improved (P <0.01). There was no significant difference in masticatory efficiency between male and female before and after treatment (P> 0.05). There was no significant difference in masticatory efficiency before and after the treatment of Class Ⅰ malocclusion (P> 0.05). The masticatory efficacies of Class Ⅱ and Ⅲ malocclusion and some anterior teeth were significantly improved after anti-orthodontic treatment. There was no significant difference in masticatory efficiency before and after tooth extraction group (P> 0.05). The masticatory efficiency of the tooth group was significantly improved after treatment (P <0.01).