title: Bond strength between acrylic resin and maxillofacial silicone.
abstract: The development of implant dentistry improved the possibilities of rehabilitation with maxillofacial prosthesis. However, clinically it is difficult to bond the silicone to the attachment system.
  
  
  OBJECTIVE
  This study aimed to evaluate the effect of an adhesive system on the bond strength between acrylic resin and facial silicone.
  
  
  METHODS
  A total of 120 samples were fabricated with auto-polymerized acrylic resin and MDX 4-4210 facial silicone. Both materials were bonded through mechanical retentions and/or application of primers (DC 1205 primer and Sofreliner primer S) and adhesive (silastic medical adhesive type A) or not (control group). Samples were divided into 12 groups according to the method used to attach the silicone to the acrylic resin. All samples were subjected to a T-peel test in a universal testing machine. Failures were classified as adhesive, cohesive or mixed. The data were evaluated by the analysis of variance (ANOVA) and the Tukey's HSD test (α=.05).
  
  
  RESULTS
  The highest bond strength values (5.95 N/mm; 3.07 N/mm; 4.75 N/mm) were recorded for the samples that received a Sofreliner primer application. These values were significantly higher when the samples had no scratches and did not receive the application of silastic medical adhesive type A.
  
  
  CONCLUSIONS
  The most common type of failure was adhesive. The use of Sofreliner primer increased the bond strength between the auto-polymerized acrylic resin and the Silastic MDX 4-4210 facial silicone.
authors: Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista, Araçatuba, SP, Brazil.
authors: Marcela Filié
authors: MF
authors: Haddad
authors: Marcelo Coelho
authors: MC
authors: Goiato
authors: Daniela Micheline dos
authors: DM
authors: Santos
authors: Nádia de Marchi
authors: Nde M
authors: Crepaldi
authors: Aldiéris Alves
authors: AA
authors: Pesqueira
authors: Lisiane Cristina
authors: LC
authors: Bannwart
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000269:Adhesives / Q000737:chemistry*; D000704:Analysis of Variance; D001840:Dental Bonding / Q000379:methods*; D015921:Dental Implants; D019544:Equipment Failure Analysis; D008422:Materials Testing; D008447:Maxillofacial Prosthesis; D012826:Silicone Elastomers / Q000737:chemistry*; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D000180:Acrylic Resins; D000269:Adhesives; D015921:Dental Implants; D012826:Silicone Elastomers