Enamel and cementum fluoride uptake from a glass ionomer cement.
Enamel and cementum fluoride uptake from a glass ionomer cement.
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牙釉质和牙骨质从玻璃离子水门汀中吸收氟化物。
DOI：
10.1159/000260773
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发表时间：
1984
期刊：
影响因子：
4.2
通讯作者：
Switzer,P
中科院分区：
文献类型：
--
作者：
Retief,DH;Bradley,EL;Denton,JC;Switzer,P
在45颗离体上颌中切牙的牙骨质-釉质交界处制备V类洞。用于分析的牙釉质样品通过高氯酸蚀刻从圆形区域获得，直径为1 mm，分别位于距牙釉质的切缘和顶缘1.5、3.5、5.5和7.5 mm处。制剂中填充了Fuji Irectum Restorative II型。将修复的牙齿单独悬浮在37 °C的合成唾液中，并定期更换唾液。分别于术后1、3、6个月拔除15颗牙。牙釉质和牙骨质样本再次从与先前活检部位平行和相邻的部位的牙齿获得。蚀刻溶液的氟含量通过气相色谱法测定，钙含量通过原子吸收分光光度法测定。1个月后釉质获得的氟化物（± 2，500 ppm F）在3个月和6个月后保留。1个月后牙骨质获得的氟（± 15，000 ppm F）在3个月后显著减少（± 6，000 ppm F），并在6个月后保持在该水平。
Class V cavities were prepared at the cemento-enamel junction on the facial surfaces of 45 extracted human central maxillary incisors. Enamel samples for analysis were obtained by means of perchloric acid etching from circular areas, 1 mm in diameter, positioned 1.5, 3.5, 5.5, and 7.5 mm from the incisal and apical margins of the restorations, respectively. The preparations were filled with Fuji Ionomer Restorative, Type II. The restored teeth were individually suspended in synthetic saliva at 37 °C and the saliva changed at regular intervals. 15 teeth were removed after 1, 3, and 6 months, respectively. Enamel and cementum samples were again obtained from the teeth from sites parallel and adjacent to the previous biopsy sites. The fluoride content of the etching solutions was determined by gas chromatography and the calcium content by atomic absorption spectrophotometry. Fluoride acquired by enamel after 1 month ( ± 2,500 ppm F) was retained after 3 and 6 months. Fluoride acquired by cementum after 1 month ( ± 15,000 ppm F) was significantly reduced after 3 months ( ± 6,000 ppm F) and maintained at this level after 6 months.