TY - JOUR
T1 - Reasons for Tooth Extractions in Japan
T2 - The Second Nationwide Survey
AU - Suzuki, Seitaro
AU - Sugihara, Naoki
AU - Kamijo, Hideyuki
AU - Morita, Manabu
AU - Kawato, Takayuki
AU - Tsuneishi, Midori
AU - Kobayashi, Keita
AU - Hasuike, Yoshihiro
AU - Sato, Tamotsu
N1 - Funding Information:
This study was supported by the 8020 Promotion Foundation( https://www.8020zaidan.or.jp/english/ ). The funding source had involvement in the study design or conduct; the collection, analysis, and interpretation of data; the preparation, review, or approval of the manuscript; or the decision to submit the manuscript for publication.
Publisher Copyright:
© 2021 The Authors
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
KW - Impacted tooth
KW - Nationwide survey
KW - Periodontal diseases
KW - Reason for extraction
KW - Tooth extraction
KW - Tooth loss
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U2 - 10.1016/j.identj.2021.05.008
DO - 10.1016/j.identj.2021.05.008
M3 - Article
AN - SCOPUS:85108969186
JO - International Dental Journal
JF - International Dental Journal
SN - 0020-6539
ER -