Evaluation of the Morphological Characteristics of Laser-Irradiated Dentin

Cvikl, Barbara; Lilaj, Bledar; Franz, Alexander; Degendorfer, Daniela; Moritz, Andreas (2015). Evaluation of the Morphological Characteristics of Laser-Irradiated Dentin. Photomedicine and laser surgery, 33(10), pp. 504-508. Mary Ann Liebert 10.1089/pho.2015.3949

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OBJECTIVE The aim of this study was to investigate the effect of different energy settings of Er:YAG laser irradiation on dentin surface morphology with respect to the number of opened dentinal tubules. BACKGROUND DATA An ideally prepared dentin surface with opened dentinal tubules is a prerequisite for adhesive fixation. No study, however, has yet compared the numbers of opened dentinal tubules with regard to statistical differences. METHODS Conventional preparations using a bur with or without additional acid etching acted as control groups. Dentin specimens were prepared from human third molars and randomly divided into eight groups according to the energy settings of the laser (1, 1.5, 4, 6, 7.5, and 8 W) and two controls (bur and bur plus acid etching). After surface preparation, dentin surfaces were analyzed with a scanning electron microscope, and the number of opened dentinal tubules in a defined area was counted. RESULTS The control groups showed smooth surfaces with (bur plus acid etching) and without opened dentinal tubules (bur), whereas all laser-irradiated surfaces showed rough surfaces. Using the energy setting of 4 W resulted in significantly more opened dentinal tubules than the conventional preparation technique using the bur with additional acid etching. In contrast, the energy setting of 8 W showed significantly fewer opened dentinal tubules, and also exhibited signs of thermal damage. CONCLUSIONS The Er:YAG laser with an energy setting of 4 W generates a dentin surface with opened dentinal tubules, a prerequisite for adhesive fixation.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > School of Dental Medicine > School of Dental Medicine, Restorative Dentistry, Research

UniBE Contributor:

Cvikl, Barbara


600 Technology > 610 Medicine & health




Mary Ann Liebert




Eveline Carmen Schuler

Date Deposited:

23 Feb 2016 16:34

Last Modified:

11 Oct 2017 02:10

Publisher DOI:


PubMed ID:






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