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Year : 2012  |  Volume : 2  |  Issue : 1  |  Page : 12-16

Thermal conduction of titanium implants under CO 2 laser irradiation in vitro

Department of Oral Surgery, Oral Radiology and Oral Medicine, University of Basel, Basel, Switzerland

Correspondence Address:
J Thomas Lambrecht
Department of Oral Surgery, Oral Radiology and Oral Medicine, School of Dental Medicine, University of Basel Hebelstrasse 3, CH-4056 Basel
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DOI: 10.4103/2231-0746.95310

PMID: 23483437

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Objective: The surgical exposure of dental implants can be performed by means of scalpel, punch, or, with less bleeding, by means of CO 2 laser. Possible overheating of the peri-implant bone tissue should be avoided. The goal of this study was to examine the temperature changes on implants under CO 2 laser irradiation (Luxar CO 2 20 SP laser from POLYMED, Glattbrugg, Switzerland). Study design: Straumann® implants were irradiated with continuous wave (cw), continuous wave with super-pulse (cw/sp), and pulsed wave (pw). The irradiation power was 4, 5, 6, 7, 8, 9, and 10 W and the irradiation times were 10, 20, 30, and 60 s. Similar temperature changes occurred in cw/sp mode and cw mode, but substantially higher temperatures appeared in pulsed wave mode. Results: The quickest temperature changes were observed with cw/sp irradiation (+0.5°C to +41.1°C, depending on the irradiation parameters). Beyond 20 s and 8 W irradiation, a rise exceeding 10°C on the implant surface was found. Conclusions: Implant diameter and length as well as the setting parameters of the CO 2 laser (irradiation power, irradiation time, and irradiation mode) are important factors to consider so that risk-free implant exposure can be accomplished. Ignoring these factors causes a risk of pathological heating of the irradiated implants and thus the surrounding tissue, which can result in the loss of an implant.

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