Skartveit L, Halse A
Department of Oral Radiology, University of Bergen, Norway.
J Oral Rehabil. 1996 Jan;23(1):1-4. doi: 10.1111/j.1365-2842.1996.tb00803.x.
To facilitate the detection of overhangs and defects adjacent to a filling, restorative materials should have a radiographic density higher than or at least similar to that of enamel. In the present study the density of 21 glass ionomer materials was measured and compared with the density of enamel, dentine, amalgam and aluminium. Most materials were more radiopaque than enamel, thereby satisfying the requirements as proposed by several investigators. The materials with lower density were mainly types intended for use in anterior teeth where the entire filling can more easily be examined clinically. They should not be used as a base under approximal fillings in order to avoid a false positive diagnosis of recurrent caries.
为便于检测充填物附近的悬突和缺损，修复材料的射线照相密度应高于牙釉质或至少与牙釉质相似。在本研究中，测量了21种玻璃离子材料的密度，并与牙釉质、牙本质、汞合金和铝的密度进行了比较。大多数材料的射线阻射性高于牙釉质，从而满足了几位研究者提出的要求。密度较低的材料主要是用于前牙的类型，在前牙中整个充填物在临床上更容易检查。它们不应作为邻面充填物下的基底使用，以避免对复发性龋齿的假阳性诊断。
