摘要
运用肌电图机对13例慢性牙周炎患者,在牙周基础治疗和系统调(牙合)前后,嚼肌和颞肌的肌电图进行了定量分析。结果表明,基础治疗后4周,切刃位和正中(牙合)位时大力紧咬的肌电波峰值明显增大;肌电/(牙合)力比值减小,咀嚼肌功能活动的效率提高;咀嚼时肌电图的时间参数活动期缩短,间歇期相对延长。调(牙合)后4周,上述指标进一步明显改善,正中(牙合)位时最大咬合耐力增强,咀嚼时肌电波峰值明显增大,肌电波的稳定性明显提高。
The effects of initial periodontal therapy and occlusal adjustment on the EMG of masseter(MA)and anterior temporal(TE)muscles were assessed and analysed quantitatively in 13 subjects with untreated advanced adult periodontitis(mean age of 39.4 years).Subjects received oral hygiene instruction(OHI),scaling and root planing im-mediately after baseline examination and were reassessed 4 weeks later.Then all of the cases continued to receiveocclusal adjustment and were reassessed 1 month later.The results demonstrated that EMG recorded amplitude ofMA and TE during maximal voluntary contraction(MVC)in edge-to-edge position(EEP)and intercuspal position(ICP)were got higher for each subject through the initial periodontal therapy.The duration and EMG amplitude ofMA and TE in MVC in ICP also became greater.And the ratio of EMG/maximal biting force(μV/kg)decreasedmarkedly,which indicate the functional efficiency of MA and TE in MVC increased after scaling and root planing.The EMG recorded amplitude of MA and habitually chewing increased significantly.After occlusal adjust-ment these parameters above continued to improve significantly(P<0.01).Futhermore,two objective time param-eters of EMG bursts,i.e.duration and interval,were suggested to evaluate the masticatory function in advancedperiodontitis patients.It was concluded that the co-ordination and muscular activity of MA and TE in MVC andchewing function all increased significantly after initial periodontal therapy as well as occlusal adjustment.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
1993年第3期195-200,共6页
West China Journal of Stomatology
