第8章 磨牙症双语.ppt

磨磨牙牙症症(Bruxism) (Bruxism) 磨牙症( Bruxism ) 磨牙症(Bruxism) “ To grind the teeth, a clenching of the teeth, associated with forceful jaw movements, resulting in rubbing, gritting, or grinding together of the teeth, usually during sleep. ”人在非生理功能状态下咀嚼肌产生不自主的收缩,使上下颌牙产生彼此磨动或紧咬,使下颌生理休息位中断的现象,属副功能运动(Parafunction) 。分类?时间: 白天磨牙夜磨牙?牙齿接触类型: 紧咬牙---正中磨牙症磨动牙齿---非正中磨牙症发生率 %~% 青少年多见 Approximately 50% to 96% of adults experience bruxism 15% of children acquire this behavior. 上海市儿童患病率 % (陈玉琴, 2004 ) ? Higher rates in patients with mental retardation and OSA ? Self reporting underestimates prevalence ? Asking bed partner is a more reliable indicator ? Most accurate estimate of bruxism is elicited from the direct dental examination ? Prevalence increases to 10 - 20 % of the general examination ( Dental literature ) ? M = F, some reports: F > M ? Familial pattern 第一节磨牙症的病因 1. 牙合因素 2. 精神、神经因素 3. 咀嚼系统的神经肌肉功能紊乱 4. 内分泌与药物因素 5. 遗传因素 6. 局部刺激因素 7. 磨牙症与牙周炎 8. 其他病因 ?牙合干扰: RCP 与 ICP 间牙合干扰非工作侧牙合干扰?早接触?长期缺牙?不良修复体?单侧咀嚼?其他