Correlation between fissure discoloration, Diagnodent measurements, and caries depth: an in vitro study.
Correlation between fissure discoloration, Diagnodent measurements, and caries depth: an in vitro study.
复制标题
裂隙变色、诊断测量和龋齿深度之间的相关性：一项体外研究。
作者：
P. Francescut;A. Lussi
目的
这项体外研究是为了将咬合表面变色的存在与其组织学深度相关联，并评估其对一组恒牙和乳牙的诊断测量的影响。
方法
95颗乳磨牙和95颗永久第三磨牙是从大体完好的牙齿池中随机挑选出来的。在每个咬合面上选择一个裂隙位置，并根据其变色进行分类。用诊断仪对每个部位测量3次。制作牙齿组织学标本，在显微镜下根据龋病程度进行评价(最终放大倍数为12.8)。
结果
在有深褐色或黑色变色组(N=23)的恒牙中，13%的人有牙本质龋病，57%的人牙本质健康或有初始釉质损害，30%的人有深釉质损害。在有深褐色和黑色变色组(N=19)的乳牙中，42%的人出现牙本质龋病，42%的人表现为深釉质龋病，16%的人表现为初期釉质损害。恒牙和乳牙之间的差异有统计学意义(P<；0.05)。在两组中，变色的裂隙比非变色或不透明的裂隙显示出更高的诊断值(与其龋齿状态无关)。
结论
对于恒牙来说，裂隙上存在的棕色或黑色斑点不能用于预测牙本质龋齿。然而，在乳牙中，裂隙变色和牙本质损伤之间的相关性更高。诊断往往会高亮显示变色的曲面。
PURPOSE
This in vitro study was performed to correlate the presence of discoloration on occlusal surfaces with its histological depth and assess its influence on Diagnodent measurements in a group of permanent and primary teeth.
METHODS
Ninty-five primary and 95 permanent third molars were randomly selected from a pool of macroscopically intact teeth. One site of the fissure on each occlusal surface was selected and categorized according to its discoloration. Each site was measured 3 times with Diagnodent. The teeth were prepared histologically and evaluated according to their caries extent under a microscope (final magnification x 12.8).
RESULTS
In the group of permanent teeth with dark brown or black discoloration (N=23), 13% showed dentinal caries, 57% were sound or had an initial enamel lesion, and 30% had a deep enamel lesion. In the group of primary teeth with dark brown and black discoloration (N=19), 42% presented dentinal caries, 42% showed deep enamel caries, and 16% had an initial enamel lesion. The difference between permanent and primary teeth was statistically significant (P<.05). Discolored fissures showed higher Diagnodent values than nondiscolored or opaque fissures in both groups (independent of their caries status).
CONCLUSIONS
The presence of brown or dark spots on fissures were not useful for the prediction of dentinal caries for permanent teeth. In primary teeth, however, a higher correlation between fissure discoloration and dentinal lesions was found. Diagnodent tends to overscore discolored surfaces.