Xiaoyun Liu , Andrew B. Cameron , Ketil Hegerstrøm Haugli , Adriane Andersen Mougios , Nicholas C.K. Heng , Joanne Jung Eun Choi
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Abstract
Objectives
To systematically review the current literature investigating the computer-aided design/computer-aided manufacturing (CAD/CAM) diamond bur deterioration with repeated use and its effects on the accuracy, marginal and internal fit, and surface roughness of the dental ceramic restorations from the subtractive manufacturing technique.
Materials and methods
Three online databases, Ovid, Scopus, and Web of Science, were screened up to February 2024. In vitro studies investigating bur wear and its influences on subtractively-manufactured (SMed) ceramic restorations, except zirconia, were included. The selected articles were limited to English-language and peer-reviewed publications. Additionally, a manual search was conducted by screening the reference lists of included studies. The risk of bias of included articles was assessed following the modified Consolidated Standards of Reporting Trials (CONSORT) checklist.
Results
Twelve studies satisfied the inclusion criteria and were included. Only one study reported that the influence of bur deterioration on the trueness of SMed restorations depended on the crown areas, but the proximal contacts showed a significant reduction. Five studies assessed the effect on marginal and internal adaptation. To a certain extent, repeated use of the same diamond burs causes a progressive increase in the marginal gap and a slight decrease in the internal luting space. Half of the included studies assessed surface roughness. The influence of bur wear was mainly due to the bur-material combination.
Conclusions
During subtractive manufacturing, bur deterioration is a crucial factor influencing the quality of fabricated ceramic restorations. Diamond burs must be replaced regularly to avoid compromising the accuracy of subtractively manufactured restorations.
期刊介绍：
The Journal of the Mechanical Behavior of Biomedical Materials is concerned with the mechanical deformation, damage and failure under applied forces, of biological material (at the tissue, cellular and molecular levels) and of biomaterials, i.e. those materials which are designed to mimic or replace biological materials.
The primary focus of the journal is the synthesis of materials science, biology, and medical and dental science. Reports of fundamental scientific investigations are welcome, as are articles concerned with the practical application of materials in medical devices. Both experimental and theoretical work is of interest; theoretical papers will normally include comparison of predictions with experimental data, though we recognize that this may not always be appropriate. The journal also publishes technical notes concerned with emerging experimental or theoretical techniques, letters to the editor and, by invitation, review articles and papers describing existing techniques for the benefit of an interdisciplinary readership.
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