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Reliability evaluation of alumina-blasted/acid-etched versus laser-sintered dental implants

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Abstract

Step-stress accelerated life testing (SSALT) and fractographic analysis were performed to evaluate the reliability and failure modes of dental implant fabricated by machining (surface treated with alumina blasting/acid etching) or laser sintering for anterior single-unit replacements. Forty-two dental implants (3.75 × 10 mm) were divided in two groups (n = 21 each): laser sintered (LS) and alumina blasting/acid etching (AB/AE). The abutments were screwed to the implants and standardized maxillary central incisor metallic crowns were cemented and subjected to SSALT in water. Use-level probability Weibull curves and reliability for a mission of 50,000 cycles at 200 N were calculated. Polarized light and scanning electron microscopes were used for failure analyses. The Beta (β) value derived from use-level probability Weibull calculation of 1.48 for group AB/AE indicated that damage accumulation likely was an accelerating factor, whereas the β of 0.78 for group LS indicated that load alone likely dictated the failure mechanism for this group, and that fatigue damage did not appear to accumulate. The reliability was not significantly different (p > 0.9) between AB/AE (61 %) and LS (62 %). Fracture of the abutment and fixation screw was the chief failure mode. No implant fractures were observed. No differences in reliability and fracture mode were observed between LS and AB/AE implants used for anterior single-unit crowns.

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Acknowledgments

The authors are thankful to A.B. Dental Devices Ltd. (Ashdod, Israel) and Marotta Dental Studio (Farmingdale, NY, USA) for their support.

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Authors and Affiliations

  1. Department of Biomaterials and Biomimetics, New York University, 345E, 24th Street, New York, NY, 10010, USA

    Erika O. Almeida, Amilcar C. Freitas Júnior & Paulo G. Coelho

  2. Postgraduate Program in Dentistry, UNIGRANRIO University—School of Health Sciences, Rua Prof. José de Souza Herdy, 1.160, 25 de Agosto, Duque de Caxias, RJ, Brazil, 25071-202

    Estevam A. Bonfante

  3. Department of Operative Dentistry, Federal University of Minas Gerais-UFMG, Belo Horizonte, MG, 31270-901, Brazil

    Nelson R. F. A. Silva

  4. Department of Periodontology and Implant Dentistry, Director for Research, New York University College of Dentistry, 345 E, 24th Street, New York, NY, 10010, USA

    Paulo G. Coelho

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  1. Erika O. Almeida
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  2. Amilcar C. Freitas Júnior
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Correspondence to Estevam A. Bonfante.

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Almeida, E.O., Júnior, A.C.F., Bonfante, E.A. et al. Reliability evaluation of alumina-blasted/acid-etched versus laser-sintered dental implants. Lasers Med Sci 28, 851–858 (2013). https://doi.org/10.1007/s10103-012-1170-8

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