Gomes Simone Guimarães Farias, Custodio William, Jufer Juliana Silva Moura, Del Bel Cury Altair Antoninha, Garcia Renata Cunha Matheus Rodrigues
Piracicaba Dental School, State University of Campinas, Brazil.
Cranio. 2010 Oct;28(4):274-9. doi: 10.1179/crn.2010.035.
Dentofacial morphology may affect orofacial functions, therefore the aim of the current study was to evaluate the influence of craniofacial morphology on masticatory function, occlusal contact area (OCA), and masticatory muscles activity. Seventy-eight (78) subjects were divided into three groups according to vertical facial pattern: 1. mesofacial; 2. brachyfacial; and 3. dolichofacial. Artificial material and the sieving method were used to access masticatory efficiency (ME). OCA was determined by registration of posterior teeth. Electromyographic (EMG) activity of the masseter and anterior temporal (AT) muscles was accessed bilaterally at rest and at maximal vertical clenching (MVC). ME (%) was significantly higher in brachyfacial and lower in dolichofacial subjects. Brachyfacials presented the highest OCA (mm2) followed by meso and dolichofacial subjects. The EMG of the masseter and AT at rest and at MVC showed that dolichofacial subjects presented the lowest activity values, while brachyfacial subjects presented significantly higher measurements. Craniofacial morphology affected masticatory function, OCA, and EMG activity of the masticatory muscles.
牙颌面形态可能会影响口面部功能，因此本研究的目的是评估颅面形态对咀嚼功能、咬合接触面积（OCA）和咀嚼肌活动的影响。78名受试者根据垂直面部模式分为三组：1. 中性面型；2. 短面型；3. 长面型。使用人工材料和筛分法来评估咀嚼效率（ME）。通过记录后牙来确定OCA。在静息状态和最大垂直紧咬（MVC）时双侧测量咬肌和颞前肌（AT）的肌电图（EMG）活动。短面型受试者的ME（%）显著更高，长面型受试者的ME（%）更低。短面型受试者的OCA（mm²）最高，其次是中性面型和长面型受试者。咬肌和AT在静息状态和MVC时的EMG显示，长面型受试者的活动值最低，而短面型受试者的测量值显著更高。颅面形态影响咀嚼功能、OCA和咀嚼肌的EMG活动。
