摘要
目的半解剖式(20°)人工牙及非解剖式(0°)人工牙全口义齿为修复上、下牙列缺失的常见方法。分析戴用上述两类全口义齿咀嚼功能的表现及差异。方法选取平均年龄68.7岁的无牙颌患者7例,设计同一基托、不同人工后牙牙尖斜度(20°、0°)总义齿,于戴义齿当天采用吸光度法测定咀嚼效率,并对患者戴用总义齿后颞肌前束(TA)、咬肌(MM)不同状态下肌电表现进行描记。结果戴用20°人工牙总义齿咀嚼效率较0°组高(P<0.05)。戴用0°人工牙总义齿咀嚼花生时肌电活动较20°组高(P<0.05)。咀嚼效率和TA、MM肌电活动成正比。结论戴用20°人工牙总义齿咀嚼一定硬度食物时较0°组可获得较好的咀嚼效率且咀嚼肌更为省力。
Abstract： Objective Semi-anatomic（20°） artificial teeth complete denture and non-anatomic（0°） artificial teeth complete denture were the common methods to repair the upper and lower dentition defect. We observed and compared the masticatory function of the two types of complete denture. Methods 7 （5 males＆2 females） volunteered edentulous patients about 68.7 years old on average were se- lected for our study and two complete dentures of the same base, but different posterior cusp inclinations （20° ,0° ） were designed. The masticatory efficiency was measured by the absorbance method on the day when patients wore the denture and the myoelectric manifesta- tions of TA and MM were scanned after that. Results The mean masticatory efficiency of 0° complete denture was lower than 20° complete denture（ P 〈 0.05 ）. The EMG activity of 0° group was more active than the 20°group when chewing peanut（ P 〈 0.05 ）. The mas- ticatory efficiency was in proportion to the TA, MM EMG activity. Conclusions When chewing food with certain hardness,better masti- catory efficiency can be achieved with 20°complete denture and the work of the masticatory muscles can be easier.
出处
《口腔医学》
CAS
2013年第12期834-837,共4页
Stomatology
关键词
总义齿
咀嚼效率
肌电活动
complete denture
masticatory efficiency
myelectric activity
