Evaluating the Effect of Different Laser Types on Dentin Fracture Resistance

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Cumhuriyet University Faculty of Dentistry

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Objectives: The aim of this in vitro study was to use fracture testing methods to evaluate the impact of the use of different laser types–particularly diode, Nd:YAG and Er:YAG lasers–on dentin fracture resistance. Materials and Methods: Ninety human maxillary incisors were used. The teeth were divided into three experimental groups and three control groups, each containing 15 samples. The laser treatments were a diode laser for experimental group 1, a Nd:YAG laser for experimental group 2, and an Er:YAG laser for experimental group 3. The teeth were then dried and obturated using the AH-Plus sealer and RevoS AS40 gutta percha (GP). Control group 1 was obturated as in the experimental groups but without laser application; control group 2 was instrumented but not obturated; and negative control group 3 had no procedure performed at all. All samples were fixed in acrylic blocks and were subjected to fracture tests using an Autograph Universal Testing Machine. The results were analysed using IBM SPSS Statistics 22 software, one-way ANOVA test and Tukey’s HSD test (to identify groups that cause a difference), with p<0.05 indicating statistical significance. Results: The applied force was significantly lower for control group 2 than for the Er:YAG laser or negative control groups (p<0.05). The remaining groups showed no statistically significant differences (p>0.05) Conclusions: The findings presented here support the conclusions that the use of Nd:YAG, Er:YAG and diode lasers in endodontic treatments has no negative impact on dentin fracture resistance and that these lasers can be used safely. © 2021. All Rights Reserved.


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dentin, disinfection, Endodontics, fracture resistance, laser


Cumhuriyet Dental Journal

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