Fatigue behavior of CAD-CAM composites versus lithium disilicate glass-ceramic.

Biomaterial(s); Creep; IPS e.max; Indirect composites; Materials science(s); Prosthetic dentistry/prosthodontics; Reliability; S-N curves; Glass-ceramics; IPS emax; Lithium disilicate glass; Material science; Prosthetic dentistries; Prosthetic dentistry/prosthodontic; S-N curve; Materials Science (all); Dentistry (all); Mechanics of Materials

Abstract :

[en] [en] OBJECTIVE: To assess the fatigue properties of four CAD-CAM composites and compare them with lithium disilicate glass-ceramic. METHODS: The materials studied were: Brilliant Crios (BRI); Cerasmart 270 (CER); Grandio (GRN); and Tetric CAD (TET), and a lithium disilicate glass-ceramic (IPS e.max CAD, EMX) as a reference. Blocks were cut into bars and used for: 1) 3-point flexural test (n = 30/material); and 2) constructing S-N curves (n = 35/material). Fatigue tests were conducted in 36 °C water bath at a frequency of 1 Hz lasting up to 3 × 106 cycles. The S-N curves were plotted using the Basquin model, assuming a distribution of fatigue life following the Weibull statistics. Digital microscopy was used to study the creep of a runout composite sample (CER), and fractured surfaces of selected samples were analyzed using laser confocal microscopy and scanning electron microscopy. RESULTS: Compared to EMX, CAD-CAM composites have a shorter lifespan but comparable fatigue degradation (fatigue to flexural strength ratios) at 5 × 104 cycles (0.57-0.65 versus 0.58). Their slow crack growth parameter (n) were close, ranging from 10.4 to 13.3 for CAD-CAM composites and 14.2 for EMX. Fatigue data of CAD-CAM composites showed less variability than EMX. Creep was detected in CAD-CAM composites at 3 × 106 cycles. SIGNIFICANCE: Despite CAD-CAM composites having shorter lifetimes than EMX, they show similar resistance to fatigue degradation. Time-dependent factors seem to significantly influence composites fatigue at lower stress levels. Thus, extended fatigue testing in water, despite being time-consuming and costly, is essential for understanding material behavior under clinical conditions.

Research Center/Unit :

d‐BRU - Dental Biomaterials Research Unit - ULiège

Disciplines :

Dentistry & oral medicine

Author, co-author :

Karevan, Yousef ; Université de Liège - ULiège > Dental biomaterials research unit (d-BRU)

Eldafrawy, Maher ; Université de Liège - ULiège > Département des sciences dentaires > Biomatériaux dentaires

Herman, Raphaël ; Université de Liège - ULiège > Département des sciences dentaires > Biomatériaux dentaires

Sanchez, Christelle ; Université de Liège - ULiège > Département des sciences dentaires > Biomatériaux dentaires

Sadoun, Michaël; MaJEB sprl, Liège, Belgium

Mainjot, Amélie ; Université de Liège - ULiège > Département des sciences dentaires > Biomatériaux dentaires

Language :

English

Title :

Fatigue behavior of CAD-CAM composites versus lithium disilicate glass-ceramic.

Publication date :

12 July 2025

Journal title :

Dental Materials

ISSN :

0109-5641

eISSN :

1879-0097

Publisher :

Elsevier, England

Peer reviewed :

Peer Reviewed verified by ORBi

Tags :

d-BRU Biomaterials Platform

Additional URL :

https://api.elsevier.com/content/article/PII:S0109564125007006?httpAccept=text/xml

Available on ORBi :

since 06 August 2025

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