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KMID : 0362120200420030228
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Journal of Technologic Dentistry
2020 Volume.42 No. 3 p.228 ~ p.233
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A study on marginal fit of the ceramic-based hybrid resin restoration for dental CAD/CAM systems
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Jeong Chang-Seop
Park Jong-Kyoung
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Abstract
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Purpose: This study aimed to assess and compare the marginal fit of ceramic-based hybrid resin restoration (HYB) and zirconia restoration (ZIR) for dental computer-aided design/ computer-aided manufacturing systems.
Methods: A stainless steel master model was produced. The impression was first made with silicone, and then stone working models were produced. A total of twenty restorations were fabricated with two different materials: ZIR and HYB. The silicone film thickness of the marginal gap was measured using a digital microscope; digital photos were taken at a magnification of ×160, and then analyzed using a measurement software. The values of the result were evaluated with the independent-sample t-test (α=0.05). All statistical analyses were performed with a statistical software.
Results: The mean values for the marginal gap was 37.14±2.96 μm for HYB, compared with 40.37±5.26 μm for ZIR. No significant difference was found between ZIR and HYB (p=0.107).
Conclusion: As a result, the marginal fit of the restoration fabricated using the hybrid resin was better than that of the restoration fabricated using zirconia. Also, the marginal fit of all groups was below the clinical acceptable range of 120 μm. Thus, HYB for dental CAD/CAM system in this study is expected to be suitable for clinical use in dentistry.
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KEYWORD
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CAD-CAM, Composite resin, Dental marginal adaptation, Dental prosthesis, Y-TZP ceramic
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