RW-Splint对安氏Ⅱ类错(牙合)伴TMD患者咀嚼肌肌电的影响
Journal of Oral Science Research(2015)
Abstract
目的:探讨安氏Ⅱ类错(牙合)畸形伴TMD患者经RW-Splint治疗1周和2个月后咀嚼肌肌电活动的改变.方法:采用EMGⅡ型表面肌电测量仪分别对12名患者RW-splint治疗前、治疗后1周及2个月的咀嚼肌肌电活动进行检测.结果:RW-splint治疗1周后患者的颞肌前束、咬肌在下颌姿势位、最大紧咬牙尖交错位时肌电幅值差异均无统计学意义;治疗2个月后最大紧咬牙尖交错位时颞肌前束、咬肌的肌电幅值的肌电幅值均降低,差异有统计学意义(P<0.05),且颞肌前束的肌电幅值大于咬肌的肌电幅值,差异有统计学意义(P<0.05).但患者下颌姿势位时颞肌前束、咬肌肌电幅值差异均无统计学意义.结论:RW-splint通过戴用时间的加长能降低咀嚼肌的肌电值,但改善其对称性作用不明显,可能与RW-splint改变了患者的牙位而呈现出原本有的早接触或(牙合)干扰有关.
MoreKey words
Temporomandibular disorders,RW-splint,Angle class Ⅱ,masticatory muscle,EMG
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