A measurement of the outer root surface temperature when using the Touch 'N' Heat during vertical compaction of warm gutta-percha :
Date
1989
DOI
Authors
Cave, Joseph R.
Version
OA Version
Citation
Abstract
When obturating a root canal system by means of vertical compaction of warm gutta-percha, the operator must warm the gutta-percha in the canal with a hot instrument. For years the heat carrying instrument used most often was the Schilder OOP heat carrier which was heated in a flame until cherry red. In the last few years an electrical heat carrying instrument, the Touch ’N Heat by Analytic Technology, was developed. It has the capabilities of providing continuous heat to its heat probe through a range of temperatures (room temperature to over 500 [degrees]C). Previous studies[161] have shown the Schilder OOP heat carrier to be safe in its transmission of heat to the attachment apparatus and in this study there was a maximum temperature increase of 4 [degrees]C detected on the outer root surface of extracted teeth.
The Touch ’N Heat is capable of delivering a high continuous temperature to its heat probe. In this investigation, the Touch ’N Heat was substituted for the Schilder heat carrier. During its use on extracted teeth, the outer root surface temperature was measured at the point of deepest penetration of the heat probe. From this temperature data, it was determined if the rise in the outer root temperature was enough to cause permanent damage to the attachment apparatus when used within the limits of normal clinical use.
A type K thermocouple was welded to the tip of the Touch ’N Heat, model 5002, heat probe. This thermocouple was connected to a Fluke 2190A digital thermometer and a Fluke 2030A printer. Another type K thermocouple was attached to the root surface of an extracted tooth (suspended in a 37 [degrees]C waterbath) at the depth of the deepest penetration of the heat probe tip.
Recordings were made simultaneously for 10 seconds of both the probe tip and the tooth at settings #1 through #10 on the continuous mode and at setting #6 on the touch mode.
The results reflected dentin’s very high capacity to insulate. When the results were evaluated within the range of clinical use (1 to 2 seconds on the Touch mode on setting #6) the highest temperature recorded from the outer root surface in all the teeth tested was 39.1 [degrees]C (TOOTH #22). This was a 1.8 [degrees]C rise in temperature. Most of the teeth had no rise in the external root temperature after 2 seconds when the Touch mode was used. An analysis of the mean temperatures when the Continuous mode was used showed the highest mean temperature after 3 seconds, regardless of setting number, was 12.6 [degrees]C below the temperature that is known to cause permanent damage to the attachment apparatus. It can be shown from an analysis of the data presented that, when used properly within normal clinical limits, the Touch ’N Heat will cause no harm to the attachment apparatus.
Description
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Colored photographs included.
Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1989 (Endodontics)
Bibliography : leaves 88-102.
Colored photographs included.
Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1989 (Endodontics)
Bibliography : leaves 88-102.
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.