Ganss C, Klimek J, Schwarz N
University of Giessen, Dental Clinic, Department of Operative and Preventive Dentistry, Schlangenzahl 14, D-35392 Giessen, Germany.
Arch Oral Biol. 2000 Oct;45(10):897-902. doi: 10.1016/s0003-9969(00)00041-8.
This study sought to compare the depths of erosive lesions in samples from different tooth sides as well as from enamel, dentine and root surfaces, and to examine the effect of preparation and polishing of specimens on erosive demineralization. From 30 impacted human third molars, two enamel samples from the mesial, distal, buccal and oral aspects, and similar samples from the radicular dentine, were prepared. One of each pair of samples was polished whereas the other was left untreated. Four samples were also prepared from the coronal dentine. For erosive demineralization, all samples were immersed in 0.05 M citric acid for 3 h and the erosion depth was calculated profilometrically. In general, natural surfaces showed significantly smaller erosion depths than polished surfaces (p< or =0.001) and enamel samples showed greater depths than coronal dentine (not significant) and root dentine (p< or =0.001). The erosion depths of the four tooth sides correlated significantly for polished enamel and coronal dentine samples but not for natural enamel specimens. There was no correlation between erosion depths for enamel and coronal dentine, and only a weak correlation between enamel and root dentine.
本研究旨在比较不同牙面以及釉质、牙本质和牙根表面样本中侵蚀性病变的深度，并研究样本制备和抛光对侵蚀性脱矿的影响。从30颗阻生人类第三磨牙上，制备了来自近中、远中、颊侧和舌侧的两个釉质样本，以及来自牙根牙本质的类似样本。每对样本中的一个进行抛光，另一个不做处理。还从冠部牙本质制备了四个样本。对于侵蚀性脱矿，将所有样本浸入0.05M柠檬酸中3小时，并通过轮廓测量法计算侵蚀深度。总体而言，天然表面的侵蚀深度明显小于抛光表面（p≤0.001），釉质样本的深度大于冠部牙本质（无显著性差异）和牙根牙本质（p≤0.001）。对于抛光的釉质和冠部牙本质样本，四个牙面的侵蚀深度显著相关，但天然釉质样本不相关。釉质和冠部牙本质的侵蚀深度之间没有相关性，釉质和牙根牙本质之间只有微弱的相关性。
