Prévost A P, Forest D, Tanguay R, DeGrandmont P
Section of Operative Dentistry, Université de Montréal, Québec, Canada.
Oral Surg Oral Med Oral Pathol. 1990 Aug;70(2):231-5. doi: 10.1016/0030-4220(90)90125-c.
The radiopacity of glass ionomer dental materials is quite variable. The use of a poorly radiopaque material as a base under other restorative materials can mislead the dentist to a diagnosis of recurrent decay. This study investigates the radiopacity of these materials and proposes a minimal radiopacity under which a material should not be used as a base or liner. All base, liner, and core formulations of glass ionomer under investigation were more radiopaque than dentin. All restorative and luting formulations of glass ionomer under investigation were less radiopaque than dentin and therefore should be avoided as bases or liners.
玻璃离子牙科材料的射线不透性差异很大。在其他修复材料下方使用射线不透性差的材料作为基底，可能会误导牙医对继发龋作出诊断。本研究调查了这些材料的射线不透性，并提出了一个最低射线不透性标准，低于该标准的材料不应用作基底或衬层。所研究的所有玻璃离子基底、衬层和核材料配方的射线不透性均高于牙本质。所研究的所有玻璃离子修复和黏固材料配方的射线不透性均低于牙本质，因此应避免用作基底或衬层。
