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The current state of the art in bond strength of laser-irradiated enamel and dentin (Nd: YAG, CO2 lasers) part 1: a literature review



The present study aimed to conduct a review of the literature about the current state of bond strength of laser-irradiated dental substrates to different adhesive systems.

Background data

The bond strength between the adhesive materials and dental substrates is affected by many factors such as the tooth itself, adhesive system, and pretreatment procedure of tooth surface. With the introduction of the lasers in conservative dentistry, it has become possible to remove enamel and dentin in an effective way like the conventional cavity preparation and subsurface conditioning methods. This opens a new possibility of using the lasers as an alternative to these procedures.

Materials and methods

An electronic search to identify studies was performed in the PubMed, Google Scholar, Research gate, and LIVIVO online databases. The relevant studies were conducted from 2009 to 2018.


Based on the literature, the collected data varied according to the type of adhesive and resin composite used, parameters (power, energy density, pulse duration, irradiation time, and distance, cooling system), substrates, and the bond strength test methodology used.


Based on the limited information and low number of studies currently available, the superiority of laser surface treatment in comparison with conventional surface treatment on bond strength could not be identified.

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Correspondence to Raida Bawazir.

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Bawazir, R., Alhaidary, D. & Gutknecht, N. The current state of the art in bond strength of laser-irradiated enamel and dentin (Nd: YAG, CO2 lasers) part 1: a literature review. Laser Dent Sci (2020).

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  • CO2 laser
  • Nd: YAG laser
  • Bond strength
  • Dental etching
  • Dental adhesive systems