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Related Concept Videos

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Related Experiment Video

Updated: Nov 30, 2025

Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry
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Decrease in posterior occlusal support area can accelerate tooth loss: The Suita study.

Shuri Fushida1, Takayuki Kosaka1, Momoyo Kida1

  • 1Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.

Journal of Prosthodontic Research
|November 12, 2020
PubMed
Summary

Reduced posterior occlusal support area (POSA) significantly accelerates tooth loss. Maintaining adequate POSA is crucial for preserving natural teeth in the general urban population.

Keywords:
EpidemiologyGerodontologyOcclusal supportRisk factorTooth loss

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Area of Science:

  • Dental research
  • Oral health epidemiology
  • Longitudinal studies

Background:

  • Decreased posterior occlusal support is linked to increased load on remaining teeth.
  • This can accelerate tooth loss, impacting overall oral health.
  • Longitudinal analysis is needed to confirm this association.

Purpose of the Study:

  • To conduct a longitudinal analysis of the association between posterior occlusal support area (POSA) and tooth loss.
  • To investigate the impact of varying degrees of POSA on tooth loss risk.

Main Methods:

  • 806 participants from the Suita Study with baseline and follow-up data were analyzed.
  • Participants were categorized into Perfect, Decreased, or Lost POSA groups using the Eichner Index.
  • Logistic regression models identified tooth loss risk factors, including POSA, demographics, and health behaviors.

Main Results:

  • The Decreased POSA group showed an adjusted odds ratio of 3.19 for tooth loss compared to the Perfect POSA group.
  • The Lost POSA group exhibited a higher adjusted odds ratio of 4.57 for tooth loss.
  • Reduced POSA was a significant predictor of accelerated tooth loss.

Conclusions:

  • Decreased posterior occlusal support area (POSA) accelerates tooth loss in the general urban population.
  • Maintaining adequate POSA is essential for preventing tooth loss.
  • Findings highlight the importance of assessing and managing POSA in dental care.