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. 2022 Jun;72(3):366-372.
doi: 10.1016/j.identj.2021.05.008. Epub 2021 Jun 28.

Reasons for Tooth Extractions in Japan: The Second Nationwide Survey

Seitaro Suzuki  1 , Naoki Sugihara  2 , Hideyuki Kamijo  3 , Manabu Morita  4 , Takayuki Kawato  5 , Midori Tsuneishi  6 , Keita Kobayashi  7 , Yoshihiro Hasuike  8 , Tamotsu Sato  8
Affiliations

Reasons for Tooth Extractions in Japan: The Second Nationwide Survey

Seitaro Suzuki et al. Int Dent J. 2022 Jun.

Abstract

Background: More than 10 years have passed since the first nationwide study on the reasons for tooth extraction in Japan. In the present study, we conducted the second nationwide survey to update the previous data.

Methods: This was a descriptive study. A sample population consisting of 5,250 dentists was selected by systematic random sampling using the 2018 membership directory of the Japan Dental Association. The reason for each permanent tooth extraction was documented by each dentist during a period of 1 week from June 4 to June 10, 2018. A questionnaire was provided for documentation. Reasons for tooth extraction were categorised into 6 groups as follows: caries, periodontal disease, fracture, orthodontics, impacted teeth, and others.

Results: A total of 2345 identified dentists responded to the questionnaire (recovery rate: 44.8%). Information on 7809 extracted teeth from 6398 patients was obtained. Periodontal disease was the main reason for tooth extraction for both sexes (men: 40.4%, women: 34.9%). Caries accounted for 30.2% of tooth extractions among men and 29.0% among women. Periodontal disease was predominant in the groups older than 55 years of age. Dental fracture accounted for 16.8% of tooth extractions among men and 19.2% among women.

Conclusions: Caries and periodontal disease are still the main reasons for tooth extraction in Japan. Moreover, dentists should note that fractures accounted for approximately one-fifth of permanent tooth extractions after the age of 45 years.

Keywords: Impacted tooth; Nationwide survey; Periodontal diseases; Reason for extraction; Tooth extraction; Tooth loss.

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Conflict of interest statement

Conflict of Interest None disclosed.

Figures

Fig 1
Fig. 1
Distribution of the reasons for tooth extraction by day of the week.
Fig 2
Fig. 2
Distribution of the reasons for tooth extraction by age.
Fig 3
Fig. 3
Distribution of the reasons for tooth extraction by tooth type. I1, central incisor; I2, lateral incisor; C, canine; P1, first premolar; P2, second premolar; M1, first molar; M2, second molar; M3, third molar.
See this image and copyright information in PMC

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