【摘要】 目的:研究侧运动中松动磨牙力的动态变化特征。方法:选择19名单侧下颌第一磨牙松动的患者,用PVDF动态力仪测量健侧和患侧下颌第一磨牙侧运动中力动态变化曲线,对两侧的测量结果进行分析。结果:侧运动中健侧力峰值平均为26.86kg,患侧的为21.24kg。侧运动中下颌第一磨牙力变化可分为5个阶段。经配对t检验,正常牙与松动牙间力峰值差异有显著性,各阶段的时间也存在显著差异。结论:采用PVDF动态力仪,明确了侧运动中松动牙的力动态变化特征。牙齿松动导致咀嚼功能降低,其力值及上升速度均比正常牙要低。更多还原

【Abstract】 Objecive:The aim of this study was to determine the dynamic characters of bite force changing in laterotrusions with maximal force of loosen teeth.Methods: 19 patients with only one loosen first lower molar were selected.A PVDF piezoelectrical transducer-based instrument for dynamic bite force was used for dynamic bite force recording.The peak value and the time of each phases of the loosen teeth and the healthy teeth on the other sides were analysed.Results: The mean peak value of bite force of the healthy side was 21.24 kg,as to the loosen teeth,the values was 26.86 kg.The courses of bite force changing pattern might be divided into 5 phases.There were significant difference between the healthy and loosen teeth in both the force and the time of each phases.Conclusions: Using the PVDF piezoelectrical transducer-based instrument,we realized the dynamic characters of bite force changing in laterotrusions of loosen teeth.Tooth loosen would lead to poor function and both the bite force and the speed of the bite force increasing declined.更多还原