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Open AccessArticle

A Comparative Study on the Mechanical Properties of a Polymer-Infiltrated Ceramic-Network Material Used for the Fabrication of Hybrid Abutment

1
Department of Prosthodontics, Faculty of Dentistry, Near East University, Lefkosa, 99138 Mersin 10, Turkey
2
Department of Prosthodontics, Faculty of Dentistry, Okan University, 34959 İstanbul, Turkey
*
Author to whom correspondence should be addressed.
Materials 2018, 11(9), 1681; https://doi.org/10.3390/ma11091681
Received: 25 July 2018 / Revised: 7 September 2018 / Accepted: 9 September 2018 / Published: 11 September 2018
(This article belongs to the Collection Dental Biomaterials)
Polymer-infiltrated ceramic-network (PICN) material is a new type of material used for the hybrid abutments of dental implants. This study aimed to compare flexural strength, bond strengths, and fracture-resistance values of PICN with lithium disilicate ceramic (LDS) and to evaluate the effect of thermocycling on the tested parameters. Twenty specimens were fabricated using computer-aided design and manufacturing (CAD-CAM) technology for each material according to three-point bending (n = 10), microshear bond strength (µSBS), and a fracture-resistance test (hybrid abutment, n = 10). All specimens of each test group were divided into two subgroups, thermocycled or nonthermocycled. Hybrid abutments were cemented on titanium insert bases and then fixed on implants to compare fracture resistance. Failure loads were recorded for each test and data were statistically analyzed. Thermocycling decreased bond strength to the resin luting agent and the fracture-resistance values of both materials (p < 0.001), whereas flexural-strength values were not affected. LDS ceramic showed significantly higher flexural strength, bond strength, and fracture-resistance values than PICN material (p < 0.001). Within the limitations of this study, LDS may be a preferable hybrid-abutment material to PICN in terms of mechanical and bonding properties. View Full-Text
Keywords: lithium disilicate; custom abutment; flexural strength; microshear bond strength; fracture resistance lithium disilicate; custom abutment; flexural strength; microshear bond strength; fracture resistance
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Ongun, S.; Kurtulmus-Yilmaz, S.; Meriç, G.; Ulusoy, M. A Comparative Study on the Mechanical Properties of a Polymer-Infiltrated Ceramic-Network Material Used for the Fabrication of Hybrid Abutment. Materials 2018, 11, 1681.

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