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Rhythmic changes in pain sensitivity in teeth.

L Pöllmann, P H Harris

    International Journal of Chronobiology
    |January 1, 1978
    PubMed
    Summary
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    Tooth pain sensitivity shows daily and yearly rhythms. Pain perception is lowest in the early morning and highest in the early afternoon, with seasonal variations also noted.

    Area of Science:

    • Dentistry
    • Chronobiology
    • Pain Research

    Background:

    • Circadian rhythms influence physiological processes, including pain perception.
    • Previous research indicated diurnal variations in pain thresholds using electrical stimuli.
    • Clinical observations suggest temporal patterns in toothache onset.

    Purpose of the Study:

    • To investigate circadian variations in dental pain threshold using a cold stimulus.
    • To explore potential circannual rhythms in tooth pain sensitivity.

    Main Methods:

    • 136 healthy men were tested using a cold stimulus on front teeth.
    • Pain threshold was determined by the minimum cold application time.
    • One subject underwent extended testing over 3 years.

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    Main Results:

    • A diurnal variation in tooth pain threshold was observed, peaking in the afternoon and lowest in the morning.
    • Results align with previous studies using electrical stimuli and clinical toothache patterns.
    • Extended testing suggested a circannual rhythm, with peak sensitivity in October/November and lowest in May.

    Conclusions:

    • Dental pain threshold exhibits significant circadian variation.
    • Seasonal fluctuations in tooth pain sensitivity may also occur.
    • Findings support the influence of biological rhythms on dental pain perception.