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Fracture load of CAD/CAM-fabricated and 3D-printed composite crowns as a function of material thickness


Zimmermann, Moritz; Ender, Andreas; Egli, Gustav; Özcan, Mutlu; Mehl, Albert (2019). Fracture load of CAD/CAM-fabricated and 3D-printed composite crowns as a function of material thickness. Clinical Oral Investigations, 23(6):2777-2784.

Abstract

OBJECTIVES:
Indirect CAD/CAM restorations can be fabricated using both subtractive and additive CAD/CAM technology. This study investigated the fracture load of crowns fabricated from three particle-filled composite CAD/CAM materials and one 3D-printed composite material.
MATERIALS AND METHODS:
Lava Ultimate, Cerasmart and Brilliant Crios were used as particle-filled composite CAD/CAM material and els-3D Harz as 3D-printed composite material. For each group, crowns with three different material thicknesses (0.5/1.0/1.5 mm) were fabricated. Control group was composed of ceramic-based CAD/CAM materials e.max CAD and Enamic. Totally, n = 180 crowns were fabricated and adhesively seated on SLA fabricated dies. Thermomechanical loading and fracture testing were performed. The data for fracture loading force were statistically analyzed by two-way ANOVA followed with multiple comparisons by post hoc Tukey's test (α = 0.05).
RESULTS:
In contrast to ceramics, all particle-filled composite crowns with 0.5-mm thickness survived fatigue testing. Forces varied statistically significantly. Brilliant Crios showed highest maximum loading force with 1580.4 ± 521.0 N (1.5 mm). Two-way ANOVA indicated that both the material and the thickness affected the fracture load (p < 0.05).
CONCLUSIONS:
Particle-filled composite resin CAD/CAM materials may have advantageous material characteristics compared to ceramic CAD/CAM materials for minimal restoration thicknesses.
CLINICAL RELEVANCE:
Composite-based CAD/CAM materials may offer new possibilities in minimally invasive restorative treatment concepts.

Abstract

OBJECTIVES:
Indirect CAD/CAM restorations can be fabricated using both subtractive and additive CAD/CAM technology. This study investigated the fracture load of crowns fabricated from three particle-filled composite CAD/CAM materials and one 3D-printed composite material.
MATERIALS AND METHODS:
Lava Ultimate, Cerasmart and Brilliant Crios were used as particle-filled composite CAD/CAM material and els-3D Harz as 3D-printed composite material. For each group, crowns with three different material thicknesses (0.5/1.0/1.5 mm) were fabricated. Control group was composed of ceramic-based CAD/CAM materials e.max CAD and Enamic. Totally, n = 180 crowns were fabricated and adhesively seated on SLA fabricated dies. Thermomechanical loading and fracture testing were performed. The data for fracture loading force were statistically analyzed by two-way ANOVA followed with multiple comparisons by post hoc Tukey's test (α = 0.05).
RESULTS:
In contrast to ceramics, all particle-filled composite crowns with 0.5-mm thickness survived fatigue testing. Forces varied statistically significantly. Brilliant Crios showed highest maximum loading force with 1580.4 ± 521.0 N (1.5 mm). Two-way ANOVA indicated that both the material and the thickness affected the fracture load (p < 0.05).
CONCLUSIONS:
Particle-filled composite resin CAD/CAM materials may have advantageous material characteristics compared to ceramic CAD/CAM materials for minimal restoration thicknesses.
CLINICAL RELEVANCE:
Composite-based CAD/CAM materials may offer new possibilities in minimally invasive restorative treatment concepts.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic of Conservative and Preventive Dentistry
04 Faculty of Medicine > Center for Dental Medicine > Clinic of Reconstructive Dentistry
04 Faculty of Medicine > Center for Dental Medicine > Klinik für Allgemein-, Behinderten- und Seniorenzahnmedizin
Dewey Decimal Classification:610 Medicine & health
Uncontrolled Keywords:General Dentistry
Language:English
Date:1 June 2019
Deposited On:06 Mar 2019 15:20
Last Modified:26 Feb 2020 08:13
Publisher:Springer
ISSN:1432-6981
Additional Information:This is a post-peer-review, pre-copyedit version of an article published in Clin Oral Invest. The final authenticated version is available online at: https://doi.org/10.1007/s00784-018-2717-2
OA Status:Green
Publisher DOI:https://doi.org/10.1007/s00784-018-2717-2
PubMed ID:30368664

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