Effect of low power Er:YAG laser irradiation of CAD-CAM resin-based composites on resin bonding

Am J Dent. 2024 Apr;37(2):71-77.

Abstract

Purpose: To investigate the effect of painless low-power Er:YAG laser irradiation of conventional and polymer-infiltrated ceramic network (PICN) type CAD-CAM resin-based composites (RBCs) on resin bonding.

Methods: An Er:YAG laser system, phosphoric acid etchant, universal adhesive, RBC, and two types of CAD-CAM RBC block were used. Microtensile bond strength, fracture mode, scanning electron microscopy (SEM) observations of bonding interfaces and CAD-CAM surfaces, and surface roughness of ground and pretreated surfaces were investigated. As pretreatment methods, low-power Er:YAG laser irradiation and air-abrasion with alumina particles were used.

Results: The effect of low-power Er:YAG laser irradiation of CAD-CAM RBCs on bonding to repair resin varied depending on the type of CAD-CAM RBCs.

Clinical significance: The low-power Er:YAG laser irradiation of the conventional CAD-CAM RBCs was shown to be effective as a surface pretreatment for resin bonding, while the laser irradiation of PICN-type CAD-CAM RBCs was not effective.

MeSH terms

  • Acid Etching, Dental
  • Ceramics / chemistry
  • Composite Resins* / chemistry
  • Computer-Aided Design*
  • Dental Bonding*
  • Humans
  • Lasers, Solid-State*
  • Materials Testing
  • Microscopy, Electron, Scanning*
  • Surface Properties*
  • Tensile Strength

Substances

  • Composite Resins