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本文就198颗银汞合金充填物保持完好在20年以上的牙齿进行了临床观察。结果表明:充填时间最长者55年,20年以上者99颗,30年以上者57颗,40年以上者40颗,50年以上者2颗、平均29年。充填牙位:磨牙150颗,双尖牙32颗,尖牙2颗,切牙14颗(P<0. 005)。充填洞型: Ⅰ类洞 110颗, Ⅱ类洞 36颗. Ⅴ类洞 22颗(P<0.05)。治疗方法:根管治疗96颗,干髓治疗44颗,活髓治疗58颗(P>0.05)。临床及X线片观察这些银汞充填牙无任何异常。作者认为制备完美的洞型、选择良好的材料,精细密合的充填,是牙体充填术的必备条件和充填物长期保持的重要因素,迄今为止,银汞合金仍是牙体充填材料中独竖一帜的佼佼者。
In this paper, 198 amalgam fillings remain intact in more than 20 years of clinical observation. The results showed that the longest filling time was 55 years, 99 more than 20 years, 57 more than 30 years, 40 more than 40 years and 50 years more than 2, with an average of 29 years. Filling teeth: molars 150, 32 canines, fangs 2, 14 incisors (P <0 005). Filling cavities: 110 Class Ⅰ cavities, 36 Class Ⅱ cavities and 22 ClassⅤ cavities (P <0.05). Treatment: 96 root canal therapy, dry marrow treatment 44, 58 live pulp therapy (P> 0.05). Clinical and X-ray observation of these amalgam filling teeth without any abnormalities. The authors believe that the preparation of a perfect hole, the choice of good materials, fine close fit filling is the prerequisite for dental filling and filling long-term important factor, so far, amalgam still dental filling material Unique vertical leader.