ArticleOral and maxillofacial surgery2025
Effects of orthognathic surgery on perioral muscle function: a comparative analysis between class II and class III female patients.
Article in Oral and maxillofacial surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThe purpose of this study was to investigate changes in lip-closing force, tongue pressure, and buccinator pressure before and after orthognathic surgery, and to compare these changes between skeletal Class II and Class III female patients. MATERIALS AND
methodsThirty-six female patients who underwent orthognathic surgery at Kyushu Dental University Hospital were enrolled. Patients were divided into two groups (Group A: skeletal Class II; Group B: skeletal Class III), and ten females with normal occlusion served as the control group. Lip-closing force, tongue pressure, and buccinator pressure were measured one day before surgery, and at three months and one year postoperatively. Maximum values were analyzed using the Mann-Whitney U test and Wilcoxon signed-rank sum test.
resultsLip-closing force, tongue pressure, and buccinator pressure significantly increased one year after surgery in both groups (p < 0.05), although a tendency toward reduction was observed at 3 months, except for lip-closing force in Group A. The change rates for lip-closing force and buccinator pressure tended to be higher in Group A, whereas tongue pressure tended to increase more in Group B. However, a significant difference was observed only in lip-closing force (p < 0.05).
conclusionOrthognathic surgery significantly improves perioral muscle function as well as facial esthetics. Significant improvements were observed in lip-closing force, tongue pressure, and buccinator pressure at 1 year postoperatively. Moreover, the increase in lip-closing force was significantly greater in Class II patients than in Class III patients.
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