title: Shear Bond Strength of Repair Systems to New CAD/CAM Restorative Materials.
abstract: OBJECTIVE
  To evaluate the bond strength of repair systems (Ceramic Repair, Clearfil Repair) to computer-aided design/computer-assisted machining (CAD/CAM) restorative materials (IPS e.max CAD, Vita Suprinity, Vita Enamic, Lava Ultimate).
  
  
  METHODS
  Thermally aged CAD/CAM restorative material specimens (5000 cycles between 5°C and 55°C) were randomly divided into two groups according to the repair system: Ceramic Repair (37% phosphoric acid + Monobond-S + Heliobond + Tetric N Ceram) or Clearfil Repair (40% phosphoric acid + mixture of Clearfil Porcelain Bond Activator and Clearfil SE Bond Primer + Clearfil SE Bond + Filtek Z250). The resin composite was light-cured on conditioned specimens. All specimens were stored in distilled water at 37°C for 24 hours and then additionally aged for 5000 thermal cycles. The shear bond strength test was performed using a universal testing machine (0.5 mm/min). Two-way ANOVA was used to detect significance differences according to the CAD/CAM material and composite repair system factors. Subgroup analyses were conducted using the least significant difference post-hoc test.
  
  
  RESULTS
  The results of two-way ANOVA indicated that bond strength values varied according to the restorative materials (p < 0.05). No significant differences were observed between the CAD/CAM restorative materials (p > 0.05), except in the Vita Suprinity group (p < 0.05). Moreover, no differences were observed between the repair systems.
  
  
  CONCLUSIONS
  Both the Clearfil and Ceramic repair systems used in the study allow for successful repairs.
authors.affiliation: Department of Prosthodontics, Akdeniz Universitesi, Antalya, Turkey.
authors.forename: Özlem
authors.initials: Ö
authors.lastname: Üstün
authors.affiliation: Private Practice, Gaziantep, Turkey.
authors.forename: Işıl Keçik
authors.initials: IK
authors.lastname: Büyükhatipoğlu
authors.affiliation: Department of Prosthodontic Dentistry, Gaziantep Universitesi, Gaziantep, Turkey.
authors.forename: Aslı
authors.initials: A
authors.lastname: Seçilmiş
mesh_terms: D002516:Ceramics / Q000627:therapeutic use; D017076:Computer-Aided Design; D001840:Dental Bonding; D003776:Dental Porcelain / Q000627:therapeutic use; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D058250:Dental Restoration Repair / Q000379:methods*; D003799:Dental Stress Analysis; D006801:Humans; D066298:In Vitro Techniques; D019279:Resin Cements / Q000627:therapeutic use; D033081:Shear Strength
chemical_list: C480092:Clearfil repair; C520133:IPS e.max CAD LT; D019279:Resin Cements; C000621297:VITA Enamic; C000621298:VITA Suprinity; D003776:Dental Porcelain
keywords: CAD/CAM materials; repair bond strength