Journal article
Fracture resistance of chairside CAD-CAM lithium disilicate occlusal veneer with various designs after mechanical aging
Journal of prosthodontics, Vol.34(3), pp.323-328
03/2025
DOI: 10.1111/jopr.13852
PMID: 38706398
Abstract
This study evaluated the fracture resistance of chairside computer-aided design and computer-aided manufacturing (CAD-CAM) lithium disilicate crown, onlay, and non-anatomical occlusal veneer (A-OV) with and without margin fabricated.
Sixty-four CAD-CAM lithium disilicate restorations were designed as (1) complete coverage crown (CCC); (2) A-OV with margin; (3) non-A-OV with margin (NA-OV-M); and (4) non-A-OV without margin (NA-OV-NM), 16 of each. Restorations were crystallized and adhesively luted to resin dies using resin cement. Specimens were then subjected to 400,000 cycles of chewing in a mastication simulator. A universal testing machine was used to apply a compressive load at a crosshead speed of 1 mm/min to the long axis of the tooth with a stainless-steel sphere until fracture occurred. One-way ANOVA followed by post hoc tests were used to assess the impact of preparation design on the fracture load of CAD-CAM lithium disilicate restorations.
The highest fracture load was recorded for CAD-CAM lithium disilicate indirect restorations for non-A-OVs preparation with margin (2549 ± 428 N) and onlay (2549 ± 293 N) and the lowest fracture load was recorded for CCCs (2389 ± 428 N); however, there was no significant (p = 0.640) between groups.
CAD-CAM lithium disilicate restorations fabricated for anatomical and non-A-OV preparation display a fracture resistance similar to CCCs. Conservative partial coverage restorations may be considered an acceptable approach for posterior teeth.
Details
- Title: Subtitle
- Fracture resistance of chairside CAD-CAM lithium disilicate occlusal veneer with various designs after mechanical aging
- Creators
- Carlos A Jurado - University of Tennessee Health Science CenterAkimasa Tsujimoto - University of IowaJoseph Molisani - University of Alabama at BirminghamChin-Chuan Fu - University of Alabama at BirminghamRamtin Sadid-Zadeh - University of Alabama at Birmingham
- Resource Type
- Journal article
- Publication Details
- Journal of prosthodontics, Vol.34(3), pp.323-328
- DOI
- 10.1111/jopr.13852
- PMID
- 38706398
- eISSN
- 1532-849X
- Language
- English
- Electronic publication date
- 05/06/2024
- Date published
- 03/2025
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984623024802771
Metrics
10 Record Views