Kaga M, Nakajima H, Sakai T, Oguchi H
Department of Pediatric Dentistry, Hokkaido University, School of Dentistry, Sapporo, Japan.
J Am Dent Assoc. 1996 Aug;127(8):1195-200. doi: 10.14219/jada.archive.1996.0411.
The authors placed 60 Class I and Class V restorations in the primary molars of children aged 4 to 10 years using a gallium alloy. Within one year after placement, the surfaces of all the restorations had deteriorated significantly due to corrosion, and the authors found remarkable amounts of corrosion products on restorations retrieved after tooth extraction or loss. The marginal integrity of many of the Class I restorations deteriorated slightly during the study; the Class V restorations showed no marginal breakdown. No other problems were detected after one year. These data indicate that the gallium alloy tested had insufficient resistance to corrosion to serve as a permanent restorative material. However, the authors suggest consideration of this alloy for use in primary teeth to reduce the exposure of children and dental professionals to mercury-containing amalgam.
作者使用镓合金在4至10岁儿童的乳磨牙中进行了60例I类和V类修复。修复后一年内，由于腐蚀，所有修复体的表面均显著恶化，并且作者在拔牙或牙齿脱落取出的修复体上发现了大量腐蚀产物。在研究期间，许多I类修复体的边缘完整性略有恶化；V类修复体未出现边缘破损。一年后未检测到其他问题。这些数据表明，所测试的镓合金抗腐蚀能力不足，无法作为永久性修复材料。然而，作者建议考虑将这种合金用于乳牙，以减少儿童和牙科专业人员接触含汞汞合金的机会。
