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[Radiopacity of composite resins]
1Depto. de Estomatologia da Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo.
Revista De Odontologia Da Universidade De Sao Paulo
|April 1, 1990
Summary
Radiographic examination revealed that kilovoltage variations significantly impact the optical densities of composite resins. However, the relative radiopacity compared to an aluminum penetrometer remained consistent across most tested kilovoltages.
Area of Science:
- Dental Materials Science
- Radiology
Background:
- Radiopacity is a critical property for evaluating the diagnostic quality of dental restorative materials.
- Understanding how radiographic parameters influence material appearance is essential for accurate clinical assessment.
Purpose of the Study:
- To investigate the effect of varying kilovoltage (kVp) on the radiopacity of six composite resins.
- To compare the optical densities of composite resins with an aluminum penetrometer under different radiographic conditions.
Main Methods:
- Standardized radiographic examination of six composite resins.
- Inclusion of an aluminum penetrometer for comparative optical density analysis.
- Systematic variation of kilovoltage settings during radiographic exposure.
Main Results:
- Kilovoltage variations demonstrably altered the optical densities of the composite resins.
- The most pronounced effects of kilovoltage changes were observed between 50-55 kVp, 55-60 kVp, and 60-65 kVp.
- Despite kilovoltage-induced density changes, the relative radiopacity of the resins compared to the aluminum penetrometer steps remained largely consistent across most tested kVp ranges.
Conclusions:
- Kilovoltage is a significant factor influencing the perceived radiopacity of composite resins.
- While absolute optical density changes, the comparative radiopacity of different composite resins, relative to a standard, is more stable across a range of kilovoltages.