title: Silane to enhance the bond between polymethyl methacrylate and titanium.
abstract: The machined surface of wrought titanium frameworks used in implant-supported, fixed prostheses does not bond well with acrylic resin. Surface pretreatment has been suggested to enhance the retention of polymethyl methacrylate to machined titanium surfaces. This study evaluated a new bonding material (Rocatec) to determine its effect on the bond strength between titanium and polymethyl methacrylate. Twenty rod-shaped specimens of grade 2 titanium (7.6 x 0.3 cm in diameter) were divided into two groups of 10 samples. Group A received no pretreatment and group B was pretreated with 110 microns alumina air abrasive and the Rocatec material. Heat-cured denture base resin was processed around each titanium sample in a cylindrical shape approximately 0.9 x 1.5 cm. A Shell-Nielsen shear test was performed with a universal testing machine at a crosshead speed of 0.5 mm/minute to determine the bond strength in megapascals (MPa). Group B specimens (23.8 +/- 1.78 MPa) had a shear strength 68% greater than group A (16.1 +/- 1.61 MPa) (p 0.0001). The results of this study indicated that surface pretreatment of grade 2 titanium with 110 microns alumina air abrasive plus Rocatec bonding material significantly enhances the shear bond strength to PMMA.
authors.affiliation: Department of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, USA.
authors.forename: K B
authors.initials: KB
authors.lastname: May
authors.forename: J
authors.initials: J
authors.lastname: Fox
authors.forename: M E
authors.initials: ME
authors.lastname: Razzoog
authors.forename: B R
authors.initials: BR
authors.lastname: Lang
mesh_terms: D000399:Air Pressure; D000537:Aluminum Oxide; D000704:Analysis of Variance; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements / Q000737:chemistry*; D003775:Dental Polishing / Q000379:methods; D017267:Dental Prosthesis Design; D003830:Denture, Partial, Fixed; D008422:Materials Testing; D008768:Methylmethacrylates / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*; D013499:Surface Properties; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry*
chemical_list: D003738:Dental Cements; D008768:Methylmethacrylates; C076811:Rocatec; D012821:Silanes; D014025:Titanium; D000537:Aluminum Oxide