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http://dx.doi.org/10.14368/jdras.2020.36.2.61

Study of the fracture resistance of zirconia on posterior fixed partial dentures based on inter-abutment distance  

Park, Gi-Beom (Department of Oral Health, Graduate School of Health & Welfare, Dankook University)
Shin, Soo-Yeon (Department of Prosthodontics, College of Dentistry, Dankook University)
Publication Information
Journal of Dental Rehabilitation and Applied Science / v.36, no.2, 2020 , pp. 61-69 More about this Journal
Abstract
Purpose: Zirconia fixed partial dentures with mandibular 2nd premolar and 2nd molar as abutments are fabricated and then the effects of inter-abutment distance on fracture resistance of zirconia fixed partial dentures is studied. Materials and Methods: The materials used in this study are Cameleon S zirconia block and S2 zirconia block, which are divided into CS Group and S2 Group applying different inter-abutment distance for each material, and the sintered zirconia fixed partial denture was luted to the epoxy resin die using a temporary luting cement, and then the fracture resistance was measured by placing a 6 mm diameter hardened steel ball on the occlusal surfaces of the pontics and applying pressure at a cross head speed of 1.0 mm/min on a universal testing machine with a load cell of 5.0 kN. Results: The fracture resistance of zirconia fixed partial dentures is not significantly affected by inter-abutment distance The fracture resistance of zirconia fixed partial dentures in CS Group was significantly higher in 15 mm of inter-abutment distance than in 13 mm and 17 mm of inter-abutment distance (P < 0.05). The fracture resistance of zirconia fixed partial dentures in S2 Group was not significantly different between the three groups (P > 0.05). Conclusion: The fracture resistance of zirconia fixed partial dentures with mandibular 2nd premolar and 2nd molar as abutments does not significantly affected by the inter-abutment distance.
Keywords
zirconia; fixed partial denture; fracture resistance; inter-abutment distance;
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