摘要
为揭示下颌前突患者正颌手术前后咀嚼肌肌电活动的特征，作者对２７例患者进行手术前后咀嚼肌肌电图的检测。结果显示：术前肌电电压值偏低，双静息期（ｓｉｌｅｎｔｐｅｒｉｏｄ，ＳＰ）检出率明显高于正常人。术后肌电电压值有以下变化：①正中咬合时嚼肌和颞肌的肌电电压值均明显上升；②前伸边缘运动时嚼肌的肌电电压值明显升高而颞肌的变化较小；③侧方边缘运动中工作侧嚼肌和颞肌的肌电电压明显上升，非工作侧变化不明显；④息止颌位时的肌电电压值下降；⑤术后ＳＰ缩短。提示正颌手术矫治颌骨畸形的可行性和必要性，为此类患者评价治疗效果提供了理论和实践依据。
patientswithmandibularprognathismwerestudiedwith40normalpeopleascon-trols.Alsubjectswereexaminedwithelectromyogram,Theresultshowsthatthevoltagewerelow-erinpatientsbeforesurgery,thedouble-silentperiodinspectrateweremuchhigherthannormalsubjects.Itwasconcludedthattheelectromyo-activityofmasticatorymuscleshadsomecharacterinpatientsaftersurgery:(1)Thevoltageofmasseterandtemporalmuscleincreasedsignificantlydur-ingmaximalvoluntaryclenching.(2)Duringprotrusivebordermovementthevoltageofmaseterin-creasedwhilethechangesofvoltageinthetemporalmuscleweresmal.(3)Inlateralbordermove-ment,thevoltageofmasseterandtemporalmuscleincreasedintheworkingside,whilethebalaningsidechangedslightly.(4)Electromyo-voltagedecreasedinrestposition.(5)Thedurationofsilentperiodhadatendencyofshorteningaftersurgery.Itdemonstratedthefeasibilityandnecesityoftreatingmandibledeformitythroughorthognathicsurgery,anditprovidedtheoreticalandpracticalsupportofevaluatingthetreatmentefectofsuchkindofpatients.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
1996年第3期169-171,共3页
Chinese Journal of Stomatology
关键词
颌骨畸形
咀嚼肌
肌电图
下颌前突
JawdeformityOrthognathicsurgeryMasticatorymusclesElectromyo-graphy
