Linear and volumetric shrinkage displacements of resin composite restorations with and without debonding
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- GHANI Siti Mariam AB
- Center for Restorative Dentistry Studies, Faculty of Dentistry, Universiti Teknologi MARA
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- HASSAN Mohamed Ibrahim ABU
- Center for Restorative Dentistry Studies, Faculty of Dentistry, Universiti Teknologi MARA
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- ABDULLAH Abdul Halim
- School of Engineering, Universiti Teknologi MARA
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- GHANI Amir Radzi AB
- School of Engineering, Universiti Teknologi MARA
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- IZRA’AI Saiful Islam
- School of Engineering, Universiti Teknologi MARA
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- AREGAWI Wondwosen
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota
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- CHEW Hooi Pin
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota
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- FOK Alex
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota
抄録
<p>The study aimed to compare shrinkage displacements of fully and partially bonded resin composite restorations (RCRs). Two groups (n=5) Class-I RCR evaluated: Group 1 (G1) fully bonded and Group 2 (G2) debonded at the floor. Experimental results were compared with predictions from simple theory and finite element analysis (FEA). The experimental linear surface displacement (LSD) was G1 62.5±5.2 µm and G2 32.8±4.0 µm. Theoretically-predicted LSD for G1 60.1±7.4 µm and G2 31.3±7.5 µm. FEA-predicted LSD were G1 65.2 µm and G2 34.6 µm. The experimental volumetric surface displacement (VSD) was G1 1.22±0.2 mm3 and G2 0.63±0.2 mm3. Theoretically-predicted VSD for G1 1.36±0.2 mm3 and G2 0.67±0.2 mm3. No significant difference (p>0.05) was found in LSD and VSD among the experimental, theoretical and FEA in the same group. Significant differences (p<0.05) were noted between the two groups, with LSD and VSD of G2 values being almost half of G1. This pattern gave an insight of a debond restoration characteristics.</p>
収録刊行物
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- Dental Materials Journal
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Dental Materials Journal 42 (5), 659-668, 2023-09-25
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