Comparison of direct and indirect occlusal contact examinations with different clenching intensities
Comparison of direct and indirect occlusal contact examinations with different clenching intensities
复制标题
DOI：
10.1111/joor.12242
复制
发表时间：
2015-03-01
影响因子：
2.9
通讯作者：
Kawara, M.
中科院分区：
文献类型：
--
作者：
Komiyama, O.;Obara, R.;Kawara, M.
本研究的目的是使用硅胶材料和肌电图（EMG）检查正常受试者咬合强度增加后咬合接触面积的变化，并比较直接口腔内检查和使用两种印模方法安装的牙模的间接检查。参与者包括 7 名男性和 5 名女性，每个象限缺失的牙齿不超过一颗，并且头部和颈部区域没有疼痛。任务期间，使用肌电图视觉反馈以最小的力、20% 最大自主收缩 (MVC) 和 40% MVC 保持牙尖间位置。借助蓝色硅胶材料以随机顺序进行三种类型的咬合接触检查：（i）口内直接咬合接触检查（DE），（ii）使用传统印模法（IEC）与牙模进行间接咬合接触检查和（iii）使用咬合印模法（IEO）。 DE 和 IEO 期间的总咬合接触面积从基线显着增加至 20% MVC，并从基线显着增加至 40% MVC，但在 IEC 期间则没有。与 IEO 和 IEC 相比，DE 期间所有牙齿咬合条件下的总咬合接触面积显着更大 (P
The aims of this study were to examine the change of occlusal contact area following the increment of clenching intensity using silicone materials and electromyography (EMG) in normal subjects and to compare direct intra-oral examination with indirect examination using dental casts mounted by means of two impression methods. Participants were 7 men and 5 women with no more than one missing tooth per quadrant and no pain in the head and neck region. During the task, intercuspal position was maintained with minimal force, 20% maximum voluntary contraction (MVC) and 40% MVC using electromyography visual feedback. Three types of occlusal contact examinations were performed with the aid of blue silicone material in randomised order: (i) intra-oral direct occlusal contact examination (DE), (ii) indirect occlusal contact examination with dental casts using conventional impression method (IEC) and (iii) using occlusal impression method (IEO). Total occlusal contact area during DE and IEO significantly increased from baseline to 20% MVC and from baseline to 40% MVC, but not during IEC. Total occlusal contact area during DE in all tooth clenching conditions was significantly larger compared to IEO and IEC (P