Abstract
目的 探讨经口内入路不同术式矫正下颌角肥大的适应证及疗效.方法 应用下颌角弧形截骨术矫正60例中重度下颌角肥大,下颌角外侧骨板矢状劈开截骨术矫治10例轻中度下颌角肥大,通过X线头影测量评价疗效.结果 下颌角弧形截骨组:术后下颌角角度为(129.491±6.277)°,下颌平面角角度为(34.447±5.068)°,下颌升支后缘切线与前颅底平面的前下交角角度为(92.702±5.520)°,面下部宽度为(10.797±0.688)cm,与术前比较差异均有统计学意义(P<0.05),接近于正常人群.下颌角外侧板矢状劈开截骨组:术后面下部宽度为(11.200±0.675)cm,与术前比较差异有统计学意义(P<0.05);术后下颌角角度为(123.444±3.468)°,下颌平面角为(30.444±3.664)°,下颌升支后缘切线与前颅底平面的前下交角为(95.333±3.000)°,与术前比较差异均无统计学意义(P>0.05).所有患者容貌较术前均有明显改观,无下齿槽神经损伤、下颌骨骨折等并发症发生.结论 针对下颌角肥大不同类型采用不同截骨方法,可有效矫治下颌角肥大畸形。
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