Journal article
Fracture Resistance of Chairside CAD/CAM Lithium Disilicate Partial and Full Coverage Crowns and Veneers for Maxillary Canines
Operative dentistry, Vol.50(1), pp.59-66
01/01/2025
DOI: 10.2341/24-073-L
PMID: 39763323
Abstract
This study aimed to assess the fracture resistance of chairside computer assisted design and computer assisted manufacturing (CAD-CAM) lithium disilicate partial and full-coverage crowns and veneers for maxillary canines.
Forty-eight restorations for maxillary right canines (12 per group) were designed as follows: (1) partial crown with finish line in the upper middle third; (2) partial crown with finish line in the lower middle third; (3) traditional labial veneer; and (4) traditional full-coverage crown. Restorations were fabricated out of lithium disilicate (Amber Mill, Hassbio) using a chairside CAD-CAM system (Cerec Dentsply Sirona). Partial and full crowns and veneers were treated with a primer system (Monobond Plus, Ivoclar Vivadent) and cemented using dual-cure resin cement (Variolink Esthetic, Ivoclar Vivadent) and cemented to printed resin dies. Subsequently, the restorations were subjected to 10,000 thermocycles between 5°C and 55°C with a dwell time of 30 seconds. The restorations were then loaded axially on the incisal edge in compression to fracture with a flat indenter.
Full-coverage crowns displayed the highest fracture resistance (809±28.57 N) followed by partial crowns with finish line in lower third (649±21.74 N) and crowns with finish line in upper third (421±17.46 N). Veneers displayed the lowest fracture resistance values (259±15.69 N).
The fracture resistance of partial and full-coverage crowns and veneers was significantly influenced by the design. Full coverage crowns displayed the highest fracture resistance and partial crowns showed higher fracture resistance than traditional veneers.
Details
- Title: Subtitle
- Fracture Resistance of Chairside CAD/CAM Lithium Disilicate Partial and Full Coverage Crowns and Veneers for Maxillary Canines
- Creators
- S Rojas-Rueda - University of Alabama at BirminghamA I Hernandez - Alfredo I. Hernandez, DDS, MS, associate professor, Division of Prosthodontics, ATSU Arizona School of Dentistry & Oral Health, Mesa, AZ, USAS Abuhammoud - University of IowaC A Jurado - University of Tennessee Health Science CenterC-C Fu - University of Alabama at BirminghamN C Lawson - University of Alabama at Birmingham
- Resource Type
- Journal article
- Publication Details
- Operative dentistry, Vol.50(1), pp.59-66
- Publisher
- OPERATIVE DENTISTRY INC
- DOI
- 10.2341/24-073-L
- PMID
- 39763323
- ISSN
- 0361-7734
- eISSN
- 1559-2863
- Language
- English
- Date published
- 01/01/2025
- Academic Unit
- Prosthodontics
- Record Identifier
- 9984772245902771
Metrics
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