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龋病是口腔科常见的多发病,缺损的修复,长期以来采用银汞合金、磷酸锌粘固粉、硅酸盐粘同粉等材料。由于银是贵金属,汞又有毒害,磷酸锌,硅酸盐粘固粉强度低,以及上述材料对齿质无粘合力,充填前需制备洞型,给病人带来较大痛苦。因此研究性能较理想的齿科充填材料成为迫切的需要。理想的充填材料应是操作性能好,与齿质有牢固的粘合力,化学稳定性好,不刺激牙髓,热膨胀系数与人牙相近,抗压强度高、硬度高,耐磨性好,不透X射线以及色泽稳定等。目前国内外研究牙科充填材料,在材料的选择及性能的改进方面,都是致力于达到上述目标,在复合树脂充填材料方面国外已有三十余种商品化的产品,但因性能尚不能
Dental caries is a common disease frequently seen in dentistry, defect repair, silver amalgam long used, zinc phosphate cement, silicate stick with the powder and other materials. As silver is a precious metal, mercury is poisonous, zinc phosphate and silicate cement are low in strength, and the above materials have no adhesion to the denture. Therefore, it is necessary to prepare a cavity before filling, which causes great pain to the patient. Therefore, it is urgent to study the dental filling material with better performance. The ideal filling material should be good performance, strong adhesion with the tooth quality, chemical stability, does not stimulate the pulp, thermal expansion coefficient and human teeth are similar, high compressive strength, high hardness, good wear resistance, Opaque x-ray and color stability. At present, the research on dental filling materials both at home and abroad has been devoted to achieving the above-mentioned goals in material selection and performance improvement. There are more than thirty kinds of commercialized products abroad in composite resin filling materials,