Fracture resistance of ultratranslucent multilayered zirconia veneers with different facial thicknesses.

Autor: Jurado CA; Division of Operative Dentistry, Department of General Dentistry, University of Tennessee Health Science Center College of Dentistry, Memphis, Tennessee, USA., Tsujimoto A; Department of Operative Dentistry, Aichi Gakuin University School of Dentistry, Nagoya, Japan.; Department of Operative Dentistry, College of Dentistry, University of Iowa, Iowa City, Iowa, USA.; Department of General Dentistry, School of Dentistry, Creighton University, Omaha, Nebraska, USA., Rojas-Rueda S; Division of Dental Biomaterials, Department of Restorative Sciences, University of Alabama at Birmingham School of Dentistry, Birmingham, Alabama, USA., Mekled S; Temple University Kornberg School of Dentistry, Philadelphia, Pennsylvania, USA., Alaqeely R; Department of Periodontology and Community Dentsitry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia., Alsayed HD; Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia., Alhotan A; Department of Dental Health, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
Jazyk: angličtina
Zdroj: Microscopy research and technique [Microsc Res Tech] 2024 Dec; Vol. 87 (12), pp. 2811-2817. Date of Electronic Publication: 2024 Jul 14.
DOI: 10.1002/jemt.24649
Abstrakt: To assess the fracture resistance of computer-aided design and computer-aided manufacturing (CAD/CAM) ultratranslucent multilayered zirconia (5Y-YZP) veneers with varying facial thickness. Sixty translucent zirconia veneers were designed and milled using a chairside CAD/CAM system for maxillary central incisors. The butt joint incisal veneer tooth preparations consisted of 1.00 mm incisal reduction, 0.40 mm chamfer margin, and three different facial reductions; 0.50, 0.75, and 1 mm, respectively. The ceramic veneers were cemented to printed resin dies and subjected to thermal cycling. Subsequently, the restorations were loaded with compressive loading force, and fracture occurrences were recorded. Scanning electron microscope (SEM) images of the fractured specimens were captured. The fracture resistance varied among the veneers with different facial thicknesses. Ultratranslucent zirconia veneers with a facial thickness of 1.00 mm exhibited the highest fracture resistance values (742.15 N), followed by those with 0.75 mm facial thickness (673 N). Minimally invasive veneers with 0.50 mm thickness displayed similar fracture resistance as thicker veneers with 0.75 mm. However, veneers with 1.00 mm thickness displayed the highest values. SEM fracture patterns for 0.50 and 0.75 mm display similar and fewer crack lines than 1.00 mm veneers. RESEARCH HIGHLIGHTS: Minimally invasive zirconia veneers exhibit similar fracture resistance to thicker veneers.
(© 2024 Wiley Periodicals LLC.)
Databáze: MEDLINE
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