Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Brazil.
Int J Oral Maxillofac Surg. 2012 Jul;41(7):830-4. doi: 10.1016/j.ijom.2012.03.025. Epub 2012 May 1.
Masticatory efficiency may be impaired in individuals with dentofacial deformities. The objective of the present study was to determine the condition of masticatory efficiency in individuals with dentofacial deformities. 30 patients with class II (DG-II) and 35 patients with class III (DG-III) dentofacial deformity participated in the study, all had an indication for orthognathic surgery. 30 volunteers (CG) with no alterations of facial morphology or dental occlusion and with no signs or symptoms of temporomandibular joint dysfunction also participated. Masticatory efficiency was analysed using a bead system (colorimetric method). Each individual chewed 4 beads, one at a time, over 20s measured with a chronometer. The groups were compared in terms of masticatory efficiency using analysis of variance (ANOVA), with the level of significance set at P<0.05. Masticatory efficiency was significantly greater in CG (P<0.05) than in DG-II and DG-III in all chewing tasks tested, with no significant difference between DG-II and DG-III (P>0.05). It was observed that the presence of class II and class III dentofacial deformity affected masticatory efficiency compared to CG, although there was no difference between DG-II and DG-III.
咀嚼效率可能会受到牙颌面畸形患者的影响。本研究的目的是确定牙颌面畸形患者的咀嚼效率状况。共有 30 名安氏 II 类（DG-II）和 35 名安氏 III 类（DG-III）牙颌面畸形患者参与了研究，他们均有正颌手术的指征。还招募了 30 名无面型或牙合畸形改变、无颞下颌关节功能紊乱症状或体征的志愿者（CG）。使用珠系统（比色法）分析咀嚼效率。每位个体在 20 秒内一次咀嚼 4 颗珠子，用秒表测量。使用方差分析（ANOVA）比较各组的咀嚼效率，显著性水平设为 P<0.05。在所有测试的咀嚼任务中，CG 的咀嚼效率均显著高于 DG-II 和 DG-III（P<0.05），而 DG-II 和 DG-III 之间无显著差异（P>0.05）。观察到与 CG 相比，安氏 II 类和 III 类牙颌面畸形的存在会影响咀嚼效率，但 DG-II 和 DG-III 之间无差异。
