title: The Effect of Primer on Bond Strength of Silicone Prosthetic Elastomer to Polymethylmethacrylate: An in vitro Study.
abstract: BACKGROUND
  The aim of the study is to evaluate interfacial bond strength between silicone prosthetic elastomers and polymethylmethacrylate (PMMA).
  
  
  METHODS
  Silicone elastomers were attached to PMMA and a total 120 specimens were fabricated which were then subdivided into 12 sub-groups. Each sample was then subjected to laboratory test to determine the bond strength. The specimen of silicone elastomer bonded to acrylic of different surfaces was placed into universal testing machine (HOUNSFIELD HT-400) for "PEEL TEST". All the values obtained were tabulated and subjected to statistical analysis.
  
  
  RESULTS
  The bond strength of silicone elastomer to acrylic resin (TRAVELON) noticed highest (Mean 4.826 ± 0.008 n/mm) when only primer was used as a surface treatment. When silicone elastomer bonded to acrylic resin (DPI) showed the bond strength of (4.351 ± 0.0089) when only primer was used as a surface treatment. Whereas the least bond strength values were found when the silicone bonded to acrylic surface treated by 120 grit sand paper that is (0.076 ± 0.00 n/mm) and (0.082 ± 0.01 n/mm) for DPI and TRAVELON respectively.
  
  
  CONCLUSIONS
  The bond strength of silicone elastomer to acrylic resin was higher when primer was used on the acrylic surface. The bond strength of silicone elastomer to acrylic resin was more with travelon resin when compared to DPI resin. But when silicone was bonded to acrylic surface with sand papering, showed less bond strength.
authors.affiliation: Senior Resident, Department of Prosthodontics, G.M.E.R.S. Medical College Sola, Ahmedabad, India .
authors.forename: Harsh
authors.initials: H
authors.lastname: Patel
authors.affiliation: Professor, Department of Prosthodontics, Pacific Dental College and Hospital , Udaipur, India .
authors.forename: Ravi Kumar
authors.initials: RK
authors.lastname: C M
authors.affiliation: Professor and Head, Department of Prosthodontics, Krishnadevaraya College of Dental Science , Bangalore, India .
authors.forename: Ponnanna
authors.initials: P
authors.lastname: A A
authors.affiliation: Senior Lecturer, Department of Prosthodontics, Vyas Dental College and Hospital , Jodhpur, India .
authors.forename: Arvind Singh
authors.initials: AS
authors.lastname: Bithu
authors.affiliation: Post Graduate Student, Department of Prosthodontics, Pacific Dental College and Hospital , Udaipur, India .
authors.forename: Kelvin
authors.initials: K
authors.lastname: Shah
authors.affiliation: Post Graduate Student, Department of Prosthodontics, Pacific Dental College and Hospital , Udaipur, India .
authors.forename: Soham
authors.initials: S
authors.lastname: Prajapati
keywords: Acrylic resin; Maxillofacial prosthesis; Travelon resin