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. 2024 Jun;44(2):356-360.
doi: 10.1002/npr2.12443. Epub 2024 Apr 11.

Decreased oral function in Japanese inpatients with schizophrenia

Yuichiro Watanabe  1 , Masataka Otake  1 , Shin Ono  1 , Masaya Ootake  1 , Kazuhiro Murakami  2 , Koichiro Kumagai  1 , Koji Matsuzawa  1 , Hiroyuki Kasahara  1 , Kazuhiro Hori  2 , Toshiyuki Someya  1
Affiliations

Decreased oral function in Japanese inpatients with schizophrenia

Yuichiro Watanabe et al. Neuropsychopharmacol Rep. 2024 Jun.

Abstract

Aim: Oral function in patients with schizophrenia has not been well-characterized. To address this, we performed a cross-sectional study of oral function in Japanese inpatients with schizophrenia.

Methods: We measured oral function, including occlusal force, tongue-lip motor function, tongue pressure, and masticatory function in 130 Japanese inpatients with schizophrenia. We then compared the frequency of clinical signs of oral hypofunction among 63 non-elderly and 67 elderly inpatients with schizophrenia, as well as data from 98 elderly control participants from a previous Japanese study.

Results: The frequency of reduced occlusal force was significantly higher in the elderly inpatients (76.2%) than in the non-elderly inpatients (43.9%) and elderly controls (43.9%). The frequency of decreased tongue-lip motor function in non-elderly inpatients (96.8%) and elderly inpatients (97.0%) was significantly higher than that in elderly controls (56.1%). The frequency of decreased tongue pressure in non-elderly inpatients (66.1%) and elderly inpatients (80.7%) was significantly higher than that in elderly controls (43.9%). Finally, the frequency of decreased masticatory function was highest in elderly inpatients (76.5%), followed by non-elderly inpatients (54.8%) and elderly controls (15.3%).

Conclusion: Oral function was decreased in both non-elderly and elderly Japanese inpatients with schizophrenia compared with elderly controls.

Keywords: masticatory function; occlusal force; schizophrenia; tongue pressure; tongue–lip motor function.

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Conflict of interest statement

The authors declare no conflict of interest.

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