Park S H, Kim K Y
Yonsei University, College of Dentistry, Department of Conservative Dentistry, Seoul, Korea.
Oper Dent. 1997 May-Jun;22(3):115-20.
The role of fluoride in the prevention of initial caries is well known in dentistry. This study was designed to evaluate the anticariogenic effect of fluoride in primers, bonding agents, composite resins, and glass-ionomer cements in enamel. Twenty-five extracted teeth that had no cracks, white spots, or enamel defects were selected. A 2 x 3 x 1.5 mm cavity was prepared on either the buccal or the lingual surface of each tooth. After pumicing, tooth enamel was etched with 37% phosphoric acid gel for 30 seconds, and the samples were divided into five groups. The samples were primed, bonded, and filled using ART Bond and Brilliant Enamel in group A, OptiBond and Herculite XRV in group B, Syntac and Tetric in group C, Scotchbond Multi-Purpose and Z100 in group D, and a resin-modified glass ionomer (Fuji II LC) in group E. All surfaces except a 2 mm zone adjacent to the cavosurface margin of each sample was protected with nail varnish, and samples were then placed into a buffered solution for 3 days to develop the initial caries. The samples were then sectioned through the restoration faciolingually into wafers that were approximately 300 microns in thickness then thinned to 150 microns. These thin samples were then examined with a polarizing microscope under water imbibition. The fluoride in primer, bonding agent, and composite filling material did not prevent the initial caries in the enamel area adjacent to the restoration, whereas the fluoride in the glass ionomer did prevent the initial-stage caries.
氟化物在预防早期龋齿方面的作用在牙科领域广为人知。本研究旨在评估氟化物在底漆、粘结剂、复合树脂和玻璃离子粘固剂中对牙釉质的防龋效果。选取了25颗无裂纹、白斑或牙釉质缺陷的离体牙。在每颗牙齿的颊面或舌面制备一个2×3×1.5毫米的洞。在进行酸蚀处理后，用37%的磷酸凝胶对牙釉质蚀刻30秒，然后将样本分为五组。A组使用ART Bond和Brilliant Enamel进行底漆处理、粘结和填充；B组使用OptiBond和Herculite XRV；C组使用Syntac和Tetric；D组使用Scotchbond Multi-Purpose和Z100；E组使用树脂改性玻璃离子水门汀（Fuji II LC）。除了每个样本洞缘表面边缘2毫米的区域外，所有表面均用指甲油保护，然后将样本置于缓冲溶液中3天以形成早期龋齿。然后将样本沿修复体的颊舌方向切片，切成厚度约为300微米的薄片，再减薄至150微米。然后在吸水状态下用偏光显微镜检查这些薄片样本。底漆、粘结剂和复合填充材料中的氟化物并不能预防修复体附近牙釉质区域的早期龋齿，而玻璃离子中的氟化物则能预防早期龋齿。
