title: Sandblasted metal brackets bonded with resin-modified glass ionomer cement in vivo.
abstract: The aim of this in vivo study was to evaluate the effects of sandblasting metal brackets on their clinical performance when resin-modified, chemically cured glass ionomer cement was used for bonding. A total of 60 patients with a range of malocclusions were allocated randomly into two groups. For the first 30 cases, teeth were divided into quadrants so that sandblasted, mesh-based metal brackets (SB) were bonded directly to the upper left and lower right quadrants using the resin-modified glass ionomer cement. The mesh-based (no sandblasting) brackets bonded to the other quadrants with the same adhesive were used as control (CO). A split-mouth design was used, and the allocation of the brackets per quadrant was reversed for the second 30 cases. Sandblasting of the bracket bases was accomplished using 25-microm aluminum oxide particles for three seconds. The manufacturer's instructions were followed for bonding. The number, site, and date of first-time bracket failures were monitored throughout active orthodontic treatment, and the observation time was 20 months. The bond failure rates were 4.9% and 4.3% for the SB and CO brackets, respectively. No statistically significant difference was found between the groups for failure rates. The bond failure sites were predominantly at the enamel-adhesive interface in both groups. Sandblasting did not have a positive effect on the clinical performance of the mesh-based metal brackets when bonded with resin-modified glass ionomer cement.
authors.affiliation: Department of Orthodontics, Faculty of Dentistry, Ondokuz Mayis University, Kurupelit, Samsun 55139, Turkey.
authors.forename: Mete
authors.initials: M
authors.lastname: Ozer
authors.forename: Selim
authors.initials: S
authors.lastname: Arici
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000293:Adolescent; D000538:Aluminum Silicates / Q000737:chemistry*; D016009:Chi-Square Distribution; D002648:Child; D001840:Dental Bonding; D019544:Equipment Failure Analysis; D005260:Female; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008297:Male; D008422:Materials Testing; D016910:Orthodontic Brackets; D009970:Orthodontics / Q000295:instrumentation*; D033081:Shear Strength
chemical_list: D000180:Acrylic Resins; D000538:Aluminum Silicates; C112133:Fuji Ortho; D005899:Glass Ionomer Cements