摘要
目的:检测各牙位牙周膜面积及不同附着水平与剩余牙周膜面积间的变化规律,探讨牙周附着丧失与牙周支持能力及牙周病预后判定间存在的可能联系。方法:收集除第三磨牙外不同牙位的离体牙420颗,在釉牙骨质界根方牙面涂以成膜材料以模拟牙周膜,在模拟膜表面平行于釉牙骨质界处描记出不同附着水平的高度线,经扫描仪扫描剥离的模拟牙周膜,再经计算机图像处理软件PhotoshopCS29.0和Scion Image4.0.3和SAS6.12软件包进行面积数据分析。结果:各牙位牙周膜面积对应不同附着水平间的数值变化规律满足一次函数的回归检验(P<0.001)。根据所得回归直线,当附着丧失超过5.37mm时,各牙位剩余牙周膜面积多降至原有面积的50%以下。结论:各牙位根面牙周膜面积随附着丧失增加而递减的变化规律与一次函数曲线最为拟合;多数牙位的附着水平在丧失超过5.37mm时,其剩余牙周膜面积已不足正常值的一半,不再具备提供额外牙周支持力的条件。
PURPOSE：To estimate the total periodontal ligament areas and the remaining periodontal ligament areas from different attachment level of each tooth type,and to determine the relationship between the attachment loss and the prognosis of periodontal diseases. METHODS：Four hundred and twenty extracted teeth （30 of each tooth type of one side of both arches,except for the third molar） were collected.The root surface of each tooth was coated with polyvinyl alcohol to produce a membrane after cleaning. The membrane was peeled off after guidelines were drawn on to simulate various attachment levels. The root surface area of each simulated attachment level was measured using image analysis software Photoshop cs 9.0 and Scion Image 4.0.3. SAS 6.12 software package was used for statistical analysis. RESULTS：The correlation and significance of the linear function for each tooth type were significant （P〈0.001）;Based on the regression beeline,the mean total periodontal ligament area of the teeth was reduced to about 50% when the attachment loss was more than 5.37mm. CONCLUSIONS：The linear function provides an appropriate fit for estimation of the remaining area of periodontal ligament from the attachment level measurement.The remaining periodontal ligament of teeth whose attachment loss is more than 5.37mm could not supply half of the original support force.
出处
《上海口腔医学》
CAS
CSCD
2010年第2期178-182,共5页
Shanghai Journal of Stomatology
基金
上海市科学技术委员会资助(项目08DZ2271100)~~
关键词
牙周膜
剩余牙周膜面积
附着水平
釉牙骨质界
Periodontal ligament
Remaining root surface area
Attachment level
Cementum enamel junction
