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クロノタイプの違いと夜食症候群は歯の健康に影響するか？
Do Chronotype Differences and Night Eating Syndrome Affect Dental Health?
PMID: 32654415 DOI: 10.1111/idh.12457.
抄録
目的:
本研究の目的は、歯科医院に入院している患者の虫歯・欠歯・埋伏歯（DMFT）指数、歯周病の重症度、歯内療法治療歯数などの歯科健康指標に、年表型の違いと夜間摂食症候群が及ぼす影響を検討することであった。
OBJECTIVE: Our aim in this study was to examine the effect of chronotype differences and night eating syndrome on dental health parameters such as the decay-missing-filled-teeth (DMFT) index, the severity of the periodontal disease, and the number of endodontically treated teeth in patients admitted to the dental clinic.
方法:
参加者は210名の患者で、朝夕質問票（MEQ）、夜食質問票（NEQ）、不眠症重症度指数（ISI）を含む心理学的ツールに記入してもらった。その後、定期的な歯科検診と同時にDMFT指数スコア、歯周病の重症度、歯内療法を受けた歯の本数を記録した。
METHODS: The participants, 210 patients, filled out a package of psychological tools, including the Morningness-Eveningness Questionnaire (MEQ), the Night Eating Questionnaire (NEQ), and the Insomnia Severity Index (ISI). Afterward, the DMFT index scores, the severity of the periodontal disease, and the number of endodontically treated teeth of patients were recorded simultaneously with a routine dental examination.
結果:
その結果、ISIとNEQのスコアは夕方型（E型）では朝型に比べて有意に高く、歯内治療本数とDMFTのスコアには時系列型間で有意な差はなかった。順序回帰分析では、歯磨きをしていない（OR 7.94、CI 6.40～9.85）、虫歯の本数の増加（OR 1.16、CI 1.13～1.19）、MEQスコアの減少（OR 0.95、CI 0.94～0.95）は、歯周病の統計的に有意な予測因子であった。
RESULTS: Findings show that the ISI and NEQ scores were significantly higher in the evening-type individuals (E-types) compared to the morning-type individuals, and there was no significant difference between the chronotypes in terms of the number of endodontically treated teeth and the DMFT scores. In ordinal regression analyses, not brushing teeth (OR 7.94, CI 6.40-9.85), increased number of decayed teeth (OR 1.16, CI 1.13-1.19), and decreased MEQ scores (OR 0.95, CI 0.94-0.95) were statistically significant predictors for periodontal disease.
結論:
年表の違いとDMFT指数、歯内治療歯数には相関はなかったが、E型の方が歯周病の重症度のリスクが高かった。
CONCLUSION: Although there was no correlation between chronotype differences and the DMFT index, and the number of endodontically treated teeth, E-types had a higher risk of periodontal disease severity.
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