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Abdel Moaty, H., Elkady, A., Fahmy, A. (2023). INFLUENCE OF DIFFERENT DUAL CURED RESIN LUTING AGENTS ON FRACTURE RESISTANCE AND SHEAR BOND STRENGTH OF LITHIUM DISILICATE OCCLUSAL VENEERS. Alexandria Dental Journal, 48(1), 137-145. doi: 10.21608/adjalexu.2021.80281.1203
Hala Mustafa Abdel Moaty; Ahmed Safwat Elkady; Amal Ezz Fahmy. "INFLUENCE OF DIFFERENT DUAL CURED RESIN LUTING AGENTS ON FRACTURE RESISTANCE AND SHEAR BOND STRENGTH OF LITHIUM DISILICATE OCCLUSAL VENEERS". Alexandria Dental Journal, 48, 1, 2023, 137-145. doi: 10.21608/adjalexu.2021.80281.1203
Abdel Moaty, H., Elkady, A., Fahmy, A. (2023). 'INFLUENCE OF DIFFERENT DUAL CURED RESIN LUTING AGENTS ON FRACTURE RESISTANCE AND SHEAR BOND STRENGTH OF LITHIUM DISILICATE OCCLUSAL VENEERS', Alexandria Dental Journal, 48(1), pp. 137-145. doi: 10.21608/adjalexu.2021.80281.1203
Abdel Moaty, H., Elkady, A., Fahmy, A. INFLUENCE OF DIFFERENT DUAL CURED RESIN LUTING AGENTS ON FRACTURE RESISTANCE AND SHEAR BOND STRENGTH OF LITHIUM DISILICATE OCCLUSAL VENEERS. Alexandria Dental Journal, 2023; 48(1): 137-145. doi: 10.21608/adjalexu.2021.80281.1203

INFLUENCE OF DIFFERENT DUAL CURED RESIN LUTING AGENTS ON FRACTURE RESISTANCE AND SHEAR BOND STRENGTH OF LITHIUM DISILICATE OCCLUSAL VENEERS

Article 3, Volume 48, Issue 1, April 2023, Page 137-145  XML PDF (498.37 K)
Document Type: Original Article
DOI: 10.21608/adjalexu.2021.80281.1203
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Authors
Hala Mustafa Abdel Moaty email 1; Ahmed Safwat Elkady2; Amal Ezz Fahmy3
1Conservative department, Restorative dentistry, Faculty of dentistry, Alexandria University
2Operative Dentistry, Conservative Dentistry Department, Faculty of Dentistry, Alexandria University.
3Biomaterial Department, Biomaterial Dentistry , Faculty of Dentistry, Alexandria University.
Abstract
Introduction: Occlusal veneer are considered promising solutions for coronal tooth structure loss. Pressed lithium di-silicate is the first choice indirect restorative material. Resin cements are the weak point in this biomimetic solution.
Objectives: Investigate the fracture resistance and shear bond strength of lithium di-silicate occlusal veneer using different dual cured resin cements.
Materials and Methods: 28 sound extracted human permanent molars were used. They were divided into 2 groups (n=14) according to 2 different tooth preparation. For group A the occlusal surface was anatomically reduced for fracture resistance test, while for group B the occlusal surface was flattened for shear bond strength test. Each group was divided into subgroups (n=7) according to resin cement system type used. For group A1 and B1, Panavia F 2.0 self-etch resin cement. While for group A2, B2 Variolink Ethetics total etch resin cement was used. lithium disilicate veneers (1mm) and discs (2×4 mm) were cemented according to manufacturer's instructions. Bonded samples were tested for fracture resistance and shear bond strength after thermocycling. Failure mode was determined. The data were statistically analyzed (p≤0.05).
RESULTS: Type of resin cement had a statistically significant difference on the fracture resistance and shear bond strength with P ≤ 0.05. Group (A2) Total etch Variolink Esthetic resin cement provided higher fracture strength (2259.5 N).Also, Group (B2) provided higher bond strength (34.36 MPa).
Conclusion: The lithium disilicate occlusal veneers are preferred using total etch adhesive to get the best bond strength and fracture resistance sufficient to withstand loading in molar region.
Keywords
Fracture resistance; Shear bond; Resin cement; Thermocycling; Occlusal veneers
Main Subjects
Conservative dentistry
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