Attin T, Buchalla W, Putz B
Department of Operative Dentistry and Preventive Dentistry, University of Göttingen Georg-August-Universität Göttingen, Robert-Koch-Str. 42, D-37075, Gottingen, Germany.
Arch Oral Biol. 2001 Sep;46(9):871-4. doi: 10.1016/s0003-9969(01)00039-5.
One dentine specimen was prepared from each of 90 bovine incisors. The samples were then evenly distributed among nine groups (A-I) and submitted to 10 alternating de- and re-mineralization cycles, including abrasion by tooth brushing. Each cycle started with a demineralization using the erosive soft drink Sprite Light for 1 min, followed by storing the samples in pooled human saliva for a total of 240 min. The specimens were removed from the saliva at different intervals (group A, 0 min; B, 15 min; C, 30 min; D, 45 min; E, 60 min; F, 90 min; G, 120 min) and brushed in an automatic brushing machine. Groups H (erosion, but no brushing) and I (no erosion, but brushing), which were also stored in saliva for 240 min, served as controls. After these cycles, loss of dentine was determined by profilometry, producing the following values (mean+/-S.D.), which were analysed statistically (P< or = 0.05): group A (5.03+/-1.49 microm), B (4.44+/-1.09 microm), C (4.91+/-0.95 microm), D (5.47+/-1.52 microm), E (5.29+/-1.45 microm), F (4.76+/-0.74 microm), G (5.16+/-0.71 microm), H (2.61+/-1.31), I (1.11+/-0.39). Groups A-G had no significant differences, but they showed a significantly greater loss of dentine than groups H and I. It is concluded that the abrasion resistance of eroded bovine dentine is still decreased after a remineralization period of 120 min.
从90颗牛切牙中各制备一个牙本质标本。然后将样本平均分配到9组（A - I）中，并进行10个交替的脱矿质和再矿化循环，包括刷牙磨损。每个循环开始时，使用腐蚀性软饮料雪碧轻（Sprite Light）进行1分钟的脱矿质处理，然后将样本在收集的人唾液中储存总共240分钟。在不同时间间隔（A组，0分钟；B组，15分钟；C组，30分钟；D组，45分钟；E组，60分钟；F组，90分钟；G组，120分钟）从唾液中取出标本，并在自动刷牙机中刷牙。同样在唾液中储存240分钟的H组（仅侵蚀，不刷牙）和I组（无侵蚀，但刷牙）作为对照。这些循环之后，通过轮廓测定法确定牙本质的损失，得出以下值（平均值±标准差），并进行统计学分析（P≤0.05）：A组（5.03±1.49微米），B组（4.44±1.09微米），C组（4.91±0.95微米），D组（5.47±1.52微米），E组（5.29±1.45微米），F组（4.76±0.74微米），G组（5.16±0.71微米），H组（2.61±1.31），I组（1.11±0.39）。A - G组之间无显著差异，但它们显示出比H组和I组明显更大的牙本质损失。得出的结论是，经过120分钟的再矿化期后，被侵蚀的牛牙本质的耐磨性仍然降低。
