Léda L, Azevedo T D, Pimentel P A, de Toledo O A, Bezerra A C
From the University of Brasilia.
J Clin Pediatr Dent. 2015 Fall;39(5):452-7. doi: 10.17796/1053-4628-39.5.452.
This study aimed to evaluate changes in the optical density of dentin in primary molars with deep caries three to six months after they were subjected to partial carious dentin removal.
This was a blind controlled, clinical therapy study. Standardized digitalized bitewing radiographs of 42 teeth were analyzed using Adobe Photoshop(®) to quantitatively determine the gray scale of the affected dentin beneath the restoration, in comparison with healthy dentin. A mixed-effects model was used for statistical analysis. The gray tone level was considered a dependent variable; the tooth region and the time, in addition to the interaction between them, were the independent variables. Values of p < 0.05 were significant.
During the interval between time zero and three months, the gray tone levels of affected dentin varied from 80.99 ± 3.17 to 98.57 ± 3.17; i.e., an estimated increase of 18 (p < 0.0001). The values for healthy dentin ranged from 118.22 ± 3.17 to 122.02 ± 3.17; i.e., a mean increase of four in the gray tone levels (p = 0.0003). During the interval between three and six months, both healthy and affected dentin showed similar behavior (98.57 ± 3.17 to 103.32 ± 3.20 and 122.02 ± 3.7 to 126.56 ± 3.20, respectively) (p = 0.0001).
Significant increments were observed in the optical density of the affected dentin after three months compared to that of healthy dentin in primary molars treated using the partial carious dentin removal technique.
本研究旨在评估乳牙深龋在进行部分龋坏牙本质去除后三至六个月时牙本质光密度的变化。
这是一项双盲对照临床治疗研究。使用Adobe Photoshop(®)对42颗牙齿的标准化数字化咬合翼片进行分析,以定量确定修复体下方患牙本质与健康牙本质相比的灰度。采用混合效应模型进行统计分析。灰度水平被视为因变量;牙齿区域、时间以及它们之间的相互作用为自变量。p < 0.05的值具有统计学意义。
在零时间至三个月的时间段内,患牙本质的灰度水平从80.99 ± 3.17变化至98.57 ± 3.17;即估计增加了18(p < 0.0001)。健康牙本质的值从118.22 ± 3.17变化至122.02 ± 3.17;即灰度水平平均增加了4(p = 0.0003)。在三至六个月的时间段内,健康牙本质和患牙本质均表现出相似的变化(分别为98.57 ± 3.17至103.32 ± 3.20以及122.02 ± 3.7至126.56 ± 3.20)(p = 0.0001)。
与采用部分龋坏牙本质去除技术治疗的乳牙中健康牙本质相比,三个月后患牙本质的光密度有显著增加。