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

Joon-Ho Yoon; Young-Bum Park; Nam-Sik Oh

doi:10.4047/jkap.2018.56.2.95

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Yoon, Park, and Oh: Analysis of longevity and success rate of fixed, removable, and implant prostheses treated in Korea

Original Article

The Journal of Korean Academy of Prosthodontics 2018; 56(2): 95-104.

Published online: 25 April 2018

DOI: https://doi.org/10.4047/jkap.2018.56.2.95

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

Joon-Ho Yoon¹

, Young-Bum Park², 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: onsdo@inha.ac.kr

Received 10 September 2017 Revised 28 December 2017 Accepted 8 February 2018

The Korean Academy of Prosthodontics

(open-access):

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

Figures and Tables

Table 1

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

FDP: Fixed Dental Prosthesis; RDP: Removable Dental Prosthesis

Table 2

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

^*P < .05; ^**P < .01; ^***P <.001; PFM: Porcelain Fused to Metal

Table 3

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

^*P < .05; ^**P < .01; ^***P < .001; RPD: Removable Partial Denture; CD: Complete Denture

Table 4

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

^*P < .05; ^**P .01; ^***P < .001; FDP: Fixed Dental Prosthesis; RDP: Removable Dental Prosthesis

Table 5

The primary cause of failure in various types of prostheses

FDP: Fixed Dental Prosthesis; RDP: Removable Dental Prosthesis

Table 6

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

^*P < .05; ^**P < .01; PFM: Porcelain Fused to Metal; FDP: Fixed Dental Prosthesis; RDP: Removable Dental Prosthesis

Table 7

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

^*P < .05; ^**P < .01; ^***P < .001; RPD: Removable Partial Denture; CD: Complete Denture; RDP: Removable Dental Prosthesis

Table 8

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

^*P < .05; FDP: Fixed Dental Prosthesis; RDP: Removable Dental Prosthesis

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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ORCID iDs: Joon-Ho Yoon
https://orcid.org/0000-0002-4571-7342
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