Open Access, Peer-reviewed, Quarterly
pISSN 0301-2875
eISSN 2005-3789
    J Korean Acad Prosthodont. 2013 Oct;51(4):269-275. Korean.
    Published online Oct 30, 2013.
    https://doi.org/10.4047/jkap.2013.51.4.269
    Copyright © 2013 The Korean Academy of Prosthodontics
    Original Article

    Retrospective study of implant stability according to the implant length, diameter and position

    Ji-Hye Kim, DDS, MSD, Jin-Yong Jeon, DDS, MSD, Yu-Ri Heo, DDS, MSD and Mee-Kyoung Son, DDS, MSD, PhD
      • Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Korea.
    • Corresponding Author: Mee-Kyoung Son. Department of Prosthodontics, School of Dentistry, Chosun University, 375 Seosuk dong, Dong-gu, Gwangju, 501-825, Korea. +82 62 220 3825, Email: son0513@chosun.ac.kr
    Received August 12, 2013; Revised September 13, 2013; Accepted September 24, 2013.

    This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

    Abstract

    Purpose

    The aim of this retrospective study was to evaluate the influence of implant diameter, length and placement to implant stability.

    Materials and methods

    Total 90 implants (US II plus™, Osstem co, Busan, Korea) of 72 patients were determined as experimental samples. The factors of diameters(ø 4 mm, ø 5 mm), lengths (10 mm, 11.5 mm, 13 mm), and implant placement (maxilla, mandible) were analyzed. The stability of the implants was measured by resonance frequency analysis (RFA) at the time of implant placement and impression taking. The difference of ISQ values according to patient's gender was evaluated by Independent t-test. ISQ values were compared between implant diameter, length and placement using one-way ANOVA and Tukey HSD test (α=.05). To compare ISQ values between at the time of surgery and impression taking, paired t-tests were used (α=.05).

    Results

    The change of implant length did not show significant different on the ISQ value (P>.05). However, 5 mm diameter implants had higher ISQ values than 4 mm diameter implants (P<.05). Implants placed on the mandible showed significantly higher ISQ values than on the maxilla (P<.05).

    Conclusion

    In order to increase implant stability, it is better to select the wider implant, and implants placed on mandible are possible to get higher stability than maxilla. ISQ values at impression taking showed higher implant stability than ISQ values at implant placement, it means that RFA is clinically effective method to evaluate the change of implant stability through the osseointegration. The consideration of the factors which may affect to the implant stability will help to determine the time of load applying and increase the implant success rate.

    Keywords
    Implant length; Diameter; Position; Implant stability

    Figures

    Fig. 1
    ISQ values (Mean ± SD) for different implant lengths in ø 4.0 mm implants at the time of surgery and impression taking. There is no statistically significant different according to the implant length.

    Fig. 2
    ISQ values (Mean ± SD) for different implant lengths in ø 5.0 mm implants at the time of surgery and impression taking. There is no statistically significant different according to the implant length.

    Fig. 3
    ISQ values (Mean ± SD) for different implant diameter in 10 mm implants at the time of surgery and impression taking. The stars (*, **) indicate significant differences between 4 mm and 5 mm diameter implants (P<.05).

    Fig. 4
    ISQ values (Mean ± SD) depending on implant position (maxilla / mandible) at the time of surgery and impression taking. The stars (*, **) indicate significant differences between implants on the maxilla and mandible (P<.05).

    Tables

    Table 1
    Mean ISQ values according to patient's gender at surgery and impression

    Table 2
    Mean ISQ values for different implant lengths in ø 4.0 mm implants at surgery and impression

    Table 3
    Mean ISQ values for different implant lengths in ø 5.0 mm implants at surgery and impression

    Table 4
    Mean ISQ values for different implant diameter in 10 mm implants at surgery and impression

    Table 5
    Mean ISQ values by implant position at surgery and impression

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    MeSH Terms
    Dental implants*
    Humans
    Mandible
    Maxilla
    Osseointegration
    Retrospective Studies*
    Metrics
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