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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/101588


    Title: Biomechanical evaluation of one-piece and two-piece small-diameter dental implants: in-vitro experimental and three dimensional finite element analyses
    Authors: 吳友仁;Wu, Aaron Yu-Jen;許瑞廷;Hsu, Jui-Ting;Chee, Winston;Chee, Winston;Lin, Yun-Te;Lin, Yun-Te;Fuh, Lih-Jyh;Fuh, Lih-Jyh;黃恆立;Huang, Heng Li;*
    Contributors: 生物資訊與醫學工程學系
    Date: 2016-08
    Issue Date: 2016-11-08 10:12:44 (UTC+8)
    Abstract: Background/Purpose

    Small-diameter dental implants are associated with a higher risk of implant failure. This study used both three-dimensional finite-element (FE) simulations and in-vitro experimental tests to analyze the stresses and strains in both the implant and the surrounding bone when using one-piece (NobelDirect) and two-piece (NobelReplace) small-diameter implants, with the aim of understanding the underlying biomechanical mechanisms.

    Methods

    Six experimental artificial jawbone models and two FE models were prepared for one-piece and two-piece 3.5-mm diameter implants. Rosette strain gauges were used for in-vitro tests, with peak values of the principal bone strain recorded with a data acquisition system. Implant stability as quantified by Periotest values (PTV) were also recorded for both types of implants. Experimental data were analyzed statistically using Wilcoxon's rank-sum test. In FE simulations, the peak value and distribution of von-Mises stresses in the implant and bone were selected for evaluation.

    Results

    In in-vitro tests, the peak bone strain was 42% lower for two-piece implants than for one-piece implants. The PTV was slightly lower for one-piece implants (PTV = −6) than for two-piece implants (PTV = −5). In FE simulations, the stresses in the bone and implant were about 23% higher and 12% lower, respectively, for one-piece implants than those for two-piece implants.

    Conclusion

    Due to the higher peri-implant bone stresses and strains, one-piece implants (NobelDirect) might be not suitable for use as small-diameter implants.
    Relation: JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION
    Appears in Collections:[生物資訊與醫學工程學系 ] 期刊論文

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