Radiopacity of computer-aided design/computer-aided manufacturing composite resin blocks

Hiroyasu Koizumi, Kentaro Okamura, Haruto Hiraba, Akihisa Kodaira, Takayuki Yoneyama, Hideo Matsumura

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)241-245
Number of pages5
JournalEuropean Journal of Oral Sciences
Volume128
Issue number3
DOIs
Publication statusPublished - 1 Jun 2020

Keywords

  • CAD/CAM
  • composite resin
  • dentin
  • enamel
  • radiopaque

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