1. Radiopacity of computer‐aided design/computer‐aided manufacturing composite resin blocks
- Author
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Hiroyasu Koizumi, Haruto Hiraba, Hideo Matsumura, Akihisa Kodaira, Takayuki Yoneyama, and Kentaro Okamura
- Subjects
Molar ,Ceramics ,Materials science ,Surface Properties ,Radiodensity ,0206 medical engineering ,Composite number ,02 engineering and technology ,Composite Resins ,03 medical and health sciences ,0302 clinical medicine ,stomatognathic system ,Block (programming) ,Materials Testing ,Dentin ,medicine ,General Dentistry ,Enamel paint ,Heavy metals ,030206 dentistry ,020601 biomedical engineering ,medicine.anatomical_structure ,visual_art ,Computer-aided manufacturing ,visual_art.visual_art_medium ,Computer-Aided Design ,Zirconium ,Biomedical engineering - Abstract
This study aimed to clarify the degree of difference in radiopacity between sixteen CAD/CAM composite resin blocks, one ceramic block, and teeth of the same thickness on radiographs. The radiographic density of CAD/CAM composite resin blocks was measured and the results were compared with the corresponding values for enamel and dentin. Additionally, the study analyzed the constituent elements of each type of CAD/CAM composite resin block and conducted an examination to identify those elements exerting an influence on radiopacity. Compared to the enamel, there were five blocks with significantly higher radiopacity, two blocks with the same level in radiopacity, and ten blocks with notably lower radiopacity. Compared to the dentin, there were ten blocks with significantly higher radiopacity, one block with the same level in radiopacity, and six blocks with notably lower radiopacity. All of the CAD/CAM composite resin blocks for molars contained barium and strontium. This result suggests that the addition of heavy metals, for example, barium, strontium, and zirconium, would be effective in providing CAD/CAM composite resin blocks with radiopacity.
- Published
- 2020
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