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Clinical Oral Investigations

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Open Access 01-06-2013 | Original Article

Chewing ability in an urban and rural population over 40 years in Shandong Province, China

Authors: Qian Zhang, Dick J. Witter, Ewald M. Bronkhorst, Nico H. J. Creugers

Published in: Clinical Oral Investigations | Issue 5/2013

Abstract

Objectives

This study aimed to assess chewing ability related to dental status.

Material and methods

One thousand four hundred sixty-two Chinese subjects over 40 years, dentate in both jaws, were categorized in a hierarchical functional classification system with and without tooth replacements. Chewing ability was analyzed using multivariable logistic regression including five dental conditions (≥10 teeth in each jaw’; ‘complete anterior regions’; “sufficient premolar regions’ (≥3 posterior occluding pairs (POPs)); ‘sufficient molar regions’ (bilaterally ≥1 POP); and tooth replacement), adjusted for six background variables. Likelihood ratios for chewing problems were assessed at each level of the hierarchical classification system based on these dental conditions.

Results

Seventy-eight to 91 % of subjects reported no or minor chewing problems. The conditions ‘≥10 teeth in each jaw’, and ‘complete anterior regions’ were not associated, whereas ‘sufficient’ premolar regions’ and ‘sufficient molar regions’ were associated with chewing problems (Ors, 0.33–0.58). If classified hierarchically, the condition ‘≥10 teeth in each jaw’ was relevant for chewing problems (likelihood ratios 3.3–3.7). ‘Sufficient premolar region’ and ‘sufficient molar region’ were relevant to reduce the likelihood ratios for having chewing problems (both approximately with a factor 2), both for soft and for hard foods. Subjects with artificial teeth added had similar chance for chewing problems compared to counterparts with natural teeth only. However, if comparing replaced teeth with natural teeth, subjects with tooth replacement showed higher chance for chewing problems.

Conclusions

Chewing ability was strongly associated with dental conditions.

Clinical relevance

The presence of at least 10 teeth in each jaw had highest impact on chewing ability.

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Title: Chewing ability in an urban and rural population over 40 years in Shandong Province, China
Authors: Qian Zhang
Dick J. Witter
Ewald M. Bronkhorst
Nico H. J. Creugers
Publication date: 01-06-2013
Publisher: Springer-Verlag
Published in: Clinical Oral Investigations / Issue 5/2013
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-012-0822-1

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Chewing ability in an urban and rural population over 40 years in Shandong Province, China

Abstract

Objectives

Material and methods

Results

Conclusions

Clinical relevance

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objectives

Material and methods

Results

Conclusions

Clinical relevance

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