Amin A-el-H M, Farid M R
Biomaterials Department, Faculty of Oral and Dental Medicine, Cairo University, Egypt.
Egypt Dent J. 1994 Oct;40(4):903-8.
A total of 12 glass-ionomer cement specimens were utilized in the present study. The specimens were divided into two equal groups. The first group was used after 10 minutes from setting, while the second was utilized after 24 hours from setting. Each group was divided into three equal subgroups (2 specimens each). The first subgroups were finished under wet condition (wet finished). The second subgroups were dry finished. On the other hand, the third subgroups were kept undisturbed (as set) under mylar strips. The specimens surfaces were then examined by a Scanning Electron Microscope (SEM). It was found that, finishing of the specimens after 24 hours from setting demonstrated more acceptable surface topography either in wet or dry conditions than finishing after 10 minutes from setting. Moreover, the dry finished specimens displayed more acceptable surface topography than the wet finished specimens. On the other hand, the as set (undisturbed) specimens the most acceptable surface topography.
本研究共使用了12个玻璃离子水门汀试件。这些试件被分为两组，每组数量相等。第一组在凝固10分钟后使用，而第二组在凝固24小时后使用。每组又被分为三个相等的亚组（每组2个试件）。第一个亚组在潮湿条件下完成修整（湿修整）。第二个亚组进行干修整。另一方面，第三个亚组在聚酯薄膜条下保持原状（凝固后）不受干扰。然后用扫描电子显微镜（SEM）检查试件表面。结果发现，凝固24小时后对试件进行修整，在潮湿或干燥条件下都比凝固10分钟后进行修整表现出更可接受的表面形貌。此外，干修整的试件比湿修整的试件表现出更可接受的表面形貌。另一方面，原状（未受干扰）的试件表面形貌最可接受。
