Journal Article

Intra-oral temperature variation over 24 hours

RJ Moore, JTF Watts, JAA Hood and DJ Burritt

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 21, issue 3, pages 249-261
Published in print June 1999 | ISSN: 0141-5387
Published online June 1999 | e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/21.3.249
Intra-oral temperature variation over 24 hours

More Like This

Show all results sharing this subject:

  • Restorative Dentistry and Orthodontics

GO

Show Summary Details

Preview

This study aimed to investigate temperature variation at archwire sites adjacent to the maxillary right central incisor and first premolar, its correlation with ambient temperature and the influence of inter-racial variation. Twenty young adult male subjects were randomly selected (13 Asian, Seven Caucasian). Thermocouples were attached to the labial archwire component of custom-made orthodontic retainers at the two intra-oral sites. A third thermocouple measured ambient temperature. A data-logger recorded temperatures at 5-second intervals over a 24-hour period. Temperatures ranged from 5.6 to 58.5°C at the incisor and from 7.9 to 54°C at the premolar, with medians of 34.9°C and 35.6°C, respectively. Ambient temperature correlated poorly with the intra-oral temperatures. The Asian and Caucasian groups had significantly different temperature distributions. On average during the 24-hour period temperatures at the incisor site were in the range of 33-37°C for 79 per cent of the time, below it for 20 per cent, and above it for only 1 per cent of the time. Corresponding figures for the premolar site were 92, 6, and 2 per cent. At both archwire sites the most frequent temperatures were in the range of 35-36°C. The data presented demonstrate that the temperature at sites on an archwire in situ varies considerably over a 24-hour period and that racial differences may exist. This information should be considered during the manufacture and use of temperature-sensitive orthodontic materials, in particular nickel-titanium archwires and springs.

Journal Article.  0 words. 

Subjects: Restorative Dentistry and Orthodontics

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.