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

Salim Ongun,Mutahhar Ulusoy,Sevcan Kurtulmus-Yilmaz,Gökçe Meriç

doi:10.3390/ma11091681

Salim Ongun, Mutahhar Ulusoy + Show 2 more

Open Access

https://doi.org/10.3390/ma11091681

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Journal: Materials	Publication Date: Sep 11, 2018
Citations: 10	License type: CC BY 4.0

Affiliation: Near East University, Okan University

Abstract

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.

Highlights

Over the past decades, esthetic has become an increasingly important factor in implant dentistry
ΜSBS, fracture-resistance values, and standard deviations of the thermocycled and nonthermocycled groups of each material are summarized in Table 2 and Figures 3–5
The null hypothesis of the study that Polymer-infiltrated ceramic-network (PICN) material might be alternative hybrid-abutment material to lithium disilicate ceramic (LDS) ceramic was rejected since PICN revealed lower flexural-strength, μSBS, and fracture-resistance values in comparison to LDS ceramic

Summary

Introduction

Esthetic has become an increasingly important factor in implant dentistry. Esthetic value has further increased especially in implants placed in the maxillary anterior region [1]. A well-positioned implant is important for esthetic and functional success in implant-supported restorations [2]. Prefabricated titanium abutments have been used for many years in the construction of implant-supported prostheses [3]. Despite having advantages, such as accelerating gingival healing and preventing galvanism or corrosion at the abutment surface, prefabricated titanium abutments may not provide an esthetic result on the anterior region, especially in case of thin gingival phenotypes. Since the metallic color of the abutment can reflect through gingiva [4], ceramic abutments have been introduced to overcome the grayish/bluish appearance of gingival tissues, which are more successful in terms of esthetics and biocompatibility [4,5]

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