Development of a Japanese Version of the Formula for Calculating Periodontal Inflamed Surface Area: A Simulation Study

Haruka Ueda, Norio Aoyama, Shinya Fuchida, Yuki Mochida, Masato Minabe and Tatsuo Yamamoto ()
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Haruka Ueda: Department of Dental Sociology, Kanagawa Dental University, Yokosuka 238-8580, Japan
Norio Aoyama: Department of Periodontology, Kanagawa Dental University, Yokosuka 238-8580, Japan
Shinya Fuchida: Department of Education Planning, Kanagawa Dental University, Yokosuka 238-8580, Japan
Yuki Mochida: Department of Dental Sociology, Kanagawa Dental University, Yokosuka 238-8580, Japan
Masato Minabe: Bunkyo Do-ri Dental Clinic, Chiba 263-0024, Japan
Tatsuo Yamamoto: Department of Dental Sociology, Kanagawa Dental University, Yokosuka 238-8580, Japan

IJERPH, 2022, vol. 19, issue 16, 1-9

Abstract: The periodontal inflamed surface area (PISA) is a useful indicator of periodontal status. However, its formula was based on a meta-analysis involving five countries, and racial differences in tooth root morphology could have affected the calculations. This study aimed to develop a Japanese version of the PISA and compare it with the original version. The formulas reported by a previous Japanese study calculating the amount of remaining periodontal ligament from clinical attachment measurements were used to calculate the PISA. A simulation was performed to compare the Japanese version with the original version by inputting probing pocket depth (PPD) from 1 to10 mm and by using clinical data. The PISA values in the Japanese version were larger and smaller than those in the original version for PPDs of 1–5 mm and 6–10 mm, respectively. The PISA values for the clinical data from the Japanese version were significantly higher than those from the original version. Both versions of the PISA values correlated equally well with body mass index. The Japanese version of the PISA can be used to assess the amount of inflamed periodontal tissue resulting from periodontitis in Japanese populations, taking into account racial heterogeneity in root morphologies.

Keywords: periodontal inflamed surface area (PISA); Japanese; inflammatory burden; periodontitis; body mass index; simulation; periodontal epithelial surface area (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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