Mechanical stability of posterior implant-supported monolithic zirconia cantilever on titanium-base abutments. An in vitro study

Article Article scientifique Article Mechanical stability of posterior implant-supported monolithic zirconia cantilever on titanium-base abutments. An in vitro study eng 2024-02-28 2024-02-28 author Riera Homar Carme 0009-0001-0090-9746 Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland. 929631 author Karasan Duygu 0000-0003-4631-2053 Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland. 931194 CUMD - Clinique de prothèse fixe (CPFI) author Sailer Irena 0000-0002-4537-7624 Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland. 809246 CUMD - Division de prothèse fixe et biomatériaux - communs (DPFB) author Mojon Philippe Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland. 26576 author Fehmer Vincent Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland. 833517 CUMD - Div. médecine dentaire régénérative & parodontologie - Communs (DPAR) author Pitta Joao 0000-0002-2334-4688 Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland. 846040 CUMD - Clinique de prothèse fixe (CPFI) 10.1111/clr.14251 38415804 0905-7161 https://onlinelibrary.wiley.com/doi/10.1111/clr.14251 Purpose: Investigate survival and technical complications of two-unit posterior implant-supported cantilever made of monolithic zirconia on titanium-base abutments (Zr-TiB) vs. porcelain-fused-to-metal on castable gold abutments (PFM-GA) using two different implant connections, internal butt-joint (IBJ) and internal conical (IC). Materials and methods: Forty-eight implants (4.3 mm diameter) were divided into four groups (n = 12) to support 2-unit mandibular premolar cantilevers with two different materials (Zr-TiB vs. PFM-GA) and two connection types (IBJ vs. IC). Tested groups were as follows: (1) IBJ/Zr-TiB; (2) IBJ/PFM-GA; (3) IC/Zr-TiB; and (4) IC/PFM-GA. Specimens were thermomechanical aged (1,200,000 cycles, 98 N, 5-55°C) with occlusal axial load on the pontic. Catastrophic and non-catastrophic events were registered, and removal torque values measured before and after aging. Specimens surviving aging were subjected to loading until failure. Survival, total complication rates, torque loss (%), and bending moments were calculated. Results: From 48 specimens, 38 survived aging. Survival rates significantly varied from 16.7% (IC/PFM-GA) to 100% (IBJ/Zr-TiB; IBJ/PFM-GA; IC/Zr-TiB) (p < .01). Internal conical connection revealed significantly higher torque loss (IC/ZrTiB - 67%) compared to internal butt-joint (IBJ/Zr-TiB - 44%; IBJ/PFM-GA - 46%) (p < .01). Bending moments were higher in internal butt-joint connections than in internal conical (p < .05). Conclusion and clinical implications: Two-unit posterior implant-supported cantilever FDPs replacing mandibular premolars composed of monolithic zirconia on titanium-base abutments demonstrated higher mechanical stability compared to porcelain-fused-to-metal on castable gold abutments in this in vitro study. The internal conical connection combined with porcelain-fused-to-metal on gold abutments revealed a high number of failures; therefore, their clinical use may be considered cautiously for this indication. Aging Bending moment Cantilever Fixed dental prosthesis Implant abutment Implant-abutment connection Zirconia Dewey 617.6 210 Division de prothèse fixe et biomatériaux 24Q2 false 908 Groupe Sailer Iréna 946 Clinical oral implants research bcd14113-613e-4f6e-be8f-f5b6b92a9239 Article (Published version) Public Riera_-_Mechanical_stability_of_pos.pdf 7780553 application/pdf CC BY-NC-ND-4.0 5b317cad5cf2c89e606b4a145303f558ce1803a2db9ac26300c9c6f56ef8279a openAccess Faculté de médecine / Section de médecine dentaire / Département de réhabilitation oro-faciale / Division de prothèse fixe et biomatériaux

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Mechanical stability of posterior implant-supported monolithic zirconia cantilever on titanium-base abutments. An in vitro study	Clinical oral implants research			2024	87	644

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