Leidal T I, Dahl J E
Acta Odontol Scand. 1980;38(2):81-8. doi: 10.3109/00016358009003482.
Amalgam fillings using alloy with lathe--cut or spherical particles were placed in 38 Class II cavities of dental students. One part of each cavity was left unfinished in order to maximize differences in preparation quality, whereas the rest of the cavity was well finished. The cavities were replicated prior to restoration, after carving, polishing, and then after one year and four years. Quality evaluation was performed clinically using a scoring system for marginal integrity and by scanning electron microscopy of replicas. After four years the restorations filled with lathe-cut amalgam showed better quality than those made with spherical amalgam. No difference could be detected due to variations in the finishing technique of the margins.
将使用车削切割或球形颗粒合金制成的汞合金填充物放置在牙科专业学生的38个II类洞形中。每个洞形的一部分保持未完成状态，以最大限度地扩大制备质量的差异，而洞形的其余部分则制备完善。在修复前、雕刻后、抛光后以及一年和四年后对洞形进行复制。临床使用边缘完整性评分系统进行质量评估，并对复制件进行扫描电子显微镜检查。四年后，填充车削切割汞合金的修复体质量优于球形汞合金修复体。未检测到因边缘修整技术差异而产生的差异。
