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Related Experiment Videos

Intra-oral temperature variation over 24 hours.

R J Moore1, J T Watts, J A Hood

  • 1Department of Oral Sciences, School of Dentistry, University of Otago, New Zealand.

European Journal of Orthodontics
|July 17, 1999
PubMed
Summary

Intra-oral archwire temperatures fluctuate significantly over 24 hours, with notable racial variations observed between Asian and Caucasian subjects. These findings impact temperature-sensitive orthodontic material development.

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Area of Science:

  • Orthodontics
  • Biomaterials Science
  • Dental Research

Background:

  • Orthodontic archwires are crucial for tooth movement.
  • Understanding intra-oral temperature fluctuations is vital for optimizing orthodontic material performance.
  • Previous research has not fully explored racial variations in intra-oral archwire temperatures.

Purpose of the Study:

  • To investigate temperature variations at archwire sites near the maxillary central incisor and first premolar.
  • To assess the correlation between intra-oral archwire temperatures and ambient temperature.
  • To examine the influence of inter-racial differences on these temperatures.

Main Methods:

  • Twenty young adult males (13 Asian, 7 Caucasian) participated.
  • Thermocouples measured temperatures at incisor and premolar archwire sites and ambient temperature over 24 hours.

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  • A data-logger recorded temperatures at 5-second intervals.

    • Main Results:

    • Intra-oral temperatures ranged from 5.6-58.5°C (incisor) and 7.9-54°C (premolar), with medians of 34.9°C and 35.6°C.
    • Ambient temperature showed poor correlation with intra-oral temperatures.
    • Significant differences in temperature distributions were found between Asian and Caucasian groups.

    Conclusions:

    • Intra-oral archwire temperatures exhibit considerable 24-hour variation.
    • Racial differences in intra-oral temperature profiles may exist.
    • Consideration of these temperature dynamics and racial variations is essential for manufacturing and utilizing temperature-sensitive orthodontic materials like nickel-titanium archwires.