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Effect of cutting flute design features on primary stability of immediate implant placement and restoration: a dynamic experimental analysis

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Abstract

Self-tapping implants with self-cutting flutes may influence primary stability, especially for the immediate implant placement and restoration protocol in which implants are affixed to the bone in the apical portion. Screw geometry differs between brands, and the effect of apical design on its clinical outcomes remains unclear. This study is aimed at investigating the influence of cutting flute shape (spiral, straight, and without flute) on primary stability by using a dynamic experimental test. Six types of dental implants were designed using computer-aided design and computer-aided manufacturing technology, consisting of three types of cutting flute shapes along with two types of screw features. A dynamic mechanical test was performed using a cyclic loading scheme. The mechanical behaviors of resistance to lateral load (RLL), maximum force, and energy dissipation were compared between groups. In the dynamic test, implants without cutting flute also exhibited higher values in RLL, maximum force, and energy dissipation. The aggressive thread implant with straight flute displayed higher RLL and had a significantly higher values in RLL (p = 0.033) at the threshold point of bone–implant interface breakdown. The implants without cutting flutes exhibited higher primary stability. Straight flute design would improve RLL for aggressive thread implant.

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Funding

This study was sponsored by Shin Kong Wu Ho-Su Memorial Hospital (2020SKHADR027).

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Authors and Affiliations

  1. School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan

    Min-Chieh Hsieh, Chang-Hung Huang & Ming-Lun Hsu

  2. Department of Dentistry, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan

    Min-Chieh Hsieh

  3. Department of Medical Research, MacKay Memorial Hospital, New Taipei City, Taiwan

    Chang-Hung Huang

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  1. Min-Chieh Hsieh
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Correspondence to Ming-Lun Hsu.

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Hsieh, MC., Huang, CH. & Hsu, ML. Effect of cutting flute design features on primary stability of immediate implant placement and restoration: a dynamic experimental analysis. Med Biol Eng Comput 61, 475–484 (2023). https://doi.org/10.1007/s11517-022-02722-w

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  • DOI: https://doi.org/10.1007/s11517-022-02722-w

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