Open Access, Peer-reviewed, Quarterly
pISSN 0301-2875
eISSN 2005-3789
    J Korean Acad Prosthodont. 2018 Apr;56(2):95-104. Korean.
    Published online Apr 25, 2018.
    https://doi.org/10.4047/jkap.2018.56.2.95
    © 2018 The Korean Academy of Prosthodontics
    Original Article

    Analysis of longevity and success rate of fixed, removable, and implant prostheses treated in Korea

    Joon-Ho Yoon,1 Young-Bum Park,2 and Nam-Sik Oh3
      • 1Department of Prosthodontics, School of Dentistry, NHIS Ilsan Hospital, Goyang, Republic of Korea.
      • 2Department of Prosthodontics, School of Dentistry, Yonsei University, Seoul, Republic of Korea.
      • 3Department of Prosthodontics, School of Medicine, Inha University, Incheon, Republic of Korea.
    • Corresponding Author: Nam-Sik Oh. Department of Prosthodontics, School of Dentistry, Inha University 100 Inha-ro, Nam-gu, Incheon 22212, Republic of Korea. +82 (0)32 890 2470: Email: onsdo@inha.ac.kr
    Received September 10, 2017; Revised December 28, 2017; Accepted February 08, 2018.

    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 purpose of this study is to analyze the factors affecting the longevity of failed prosthesis and the success rate of the prosthesis based on the data evaluated with the newly developed Korean Academy of Prosthodontics (KAP) criteria.

    Materials and methods

    Evaluation was performed in the restored prosthesis for patients who visited the prosthodontics department of the 13 dental university hospitals and general hospitals. The status of the prosthesis was classified into four categories: Good, Fair, Bad, Worst. The success was recorded if only the category was classified in ‘good’. The mean duration of failed prostheses and the success rate through Kaplan-Meier method were analyzed.

    Results

    A total of 1,804 cases of prosthesis were evaluated: 810 cases of fixed dental prostheses (FDP), 519 cases of Removable Dental Prostheses (RDP), and 475 cases of implant prosthesis. The mean duration of failed FDP was 11.41 ± 0.30 years and the median was 10 years. The mean duration of failed RDP was 8.18 ± 0.29 years and the median was 7 years. The mean duration of failed implant prosthesis was 7.99 ± 0.30 years and the median was 7 years. The factors related to the failure were as follows: number of units, abutments, abutments treated with root canal, and plaque index in FDPs; treated and opposing dentition in RDPs; the number of implants, duration of use, and plaque index in implant prostheses.

    Conclusion

    The average duration of failed prosthesis was 11.41 years for FDPs, 8.18 years for RDPs, and 7.99 years for implant prosthesis, according to the evaluation with newly developed KAP criteria.

    Keywords
    Life expectancy; Kaplan Meier analysis; Follow-up studies; Prostheses and implants

    Tables

    Table 1
    Longevity and 5-year and 10-year survival rate by prosthesis type. Survival rate was estimated by Kaplan-Meier analysis

    Table 2
    Factors affecting the failure of fixed dental prostheses using generalized estimating equations method

    Table 3
    Factors affecting the failure of removable dental prostheses using generalized estimating equations method

    Table 4
    Factors affecting the failure of implant prostheses using generalized estimating equations method

    Table 5
    The primary cause of failure in various types of prostheses

    Table 6
    Factors related to the risk of failure in fixed dental prostheses using the Cox proportional hazards model

    Table 7
    Factors related to the risk of failure in removable dental prostheses using the Cox proportional hazards model

    Table 8
    Factors related to the risk of failure in implant prostheses using the Cox proportional hazards model

    Notes

    This research was supported by a grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (grant number : HC16C2335).

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    MeSH Terms
    Dental Prosthesis
    Dental Pulp Cavity
    Dentition
    Follow-Up Studies
    Hospitals, General
    Hospitals, University
    Humans
    Kaplan-Meier Estimate
    Korea*
    Life Expectancy
    Longevity*
    Methods
    Prostheses and Implants*
    Prosthodontics
    Metrics
    Share
    Tables
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