自然头位下正常牙合人群舌骨位置X线头影测量探究

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1、自然头位下正常牙合人群舌骨位置X线头影测量探究［摘要］目的：对广东省籍正常牙合人群自然头位下舌骨的位置进行测量及性别对比研究。方法：以40例(男20例，女20例)广东籍正常牙合人群为研究对象，在自然头位下拍摄其头颅定位侧位片，采用计算机辅助X线头影测量技术,对所拍摄的头颅定位侧位片进行测量。结果：舌骨到颈椎各标志点、颅骨各标志点的距离，舌骨到下颌升支平面、前颅底平面、腭平面的距离男性明显大于女性(P<0.05)；除下颌升支平面外，舌骨到上述各点及平面的距离与鼻根点到蝶鞍点的距离(SN)的比值男性明显大于女性(P<0.05)；舌骨到下颌平面的距离、舌骨与下颌骨联合的关系、

2、舌骨与鼻根点的水平关系及舌骨的角度男女间一致(P>0.05)o结论:舌骨的位置男性较女性更靠前下方。［关键词］自然头位；舌骨；头影测量［中图分类号］R783.5［文献标识码］A［文章编号］1008-6455(2011)05-0821-04CephalometricstudyonhyoidpositioninnaturalheadpositioninnormalocclusionpeopleXINJing-leil,LANZe-dong2(1.StomatologicalHospitaloftheSouthernMedicalUniversityGuangdongProv

3、incialStomatologicalHospital,Guangzhou510280,Guangdong,China；2.StomatologicalHospitalofGuangzhouMedicalCollege)Abstract：ObjectiveTomeaturethehyoidpositioninnaturalheadpositioninnonnalocclusionpeoplefromguangdongprovinceandinvestigatethesexvariations.Methods40youthfulpersons(20malesand20f

4、emales)fromGuangdongprovincewithnormalocclusionwerechosen.Loteralcephalogramsofthesubjectsweretakenrespectivelywitharoentgenographiccephalometer.40cephalometriefilmsweretakenatthenaturalheadpositon.Landmarksoncephalometricradiographsweredigitisedandmeasurementsweremadeusingacomputerprogr

5、amme・ResultsThelineardistancesbetweenthehyoidboneandthecervicalspinepoints,eranialpoints,perpendicularmeasurementsbetweenthehyoidboneandtheramusline,sella-nasionline,palatallineweregreaterinmalesthaninfemales(P<0.05).TheratesbetweenallthesedistancesandSN(thedistancebetweensellaandnasion)

6、weregreaterinmalesthaninfemalesexcludingH-RL/SN(P<0.05).Perpendicularmeasurementbetweenthehyoidboneandthemandibularplane,therela.tionshipbetweenthehyoidboneandthemandibularsymphysis,thehorizontalrelationofthehyoidbonetothenasionandtheaxialpositionofthehyoidboneinrelationtotheothercraniof

7、acialplaneswereidenticalbetweenthesexes(P>0.05).ConclusionHyoidbonepositionwaslowerandmoreanteriorinmales.Keywords：naturalheadposition；thehyoidbone；cephalometries舌骨是颅面复合体肌肉骨骼结构中非常重要的部分。舌骨的位置受舌骨上下肌群的牵拉及喉与气管的弹性膜的牵引。舌骨在保持上气道的大小方面起着重要作用。自然头位是受试者在没有任何外部干扰的情况下最放松的头部姿势位置(自我平衡位)，