title: In vivo bracket retention comparison of a resin-modified glass ionomer cement and a resin-based bracket adhesive system after a year.
abstract: Glass ionomer orthodontic adhesives cause less enamel demineralization during fixed orthodontic appliance treatment than do traditional resin-based products. An in vivo randomized clinical trial was performed comparing the clinical performance of a resin-modified glass ionomer (RMGI) adhesive with a no-mix, resin-based (the control) adhesive over a 12-month period. The split-mouth technique was used to analyze bracket retention, bracket failure causes, and mode of failure for both adhesives in 61 patients. Bracket-failure rates were 10% for the RMGI and 4% for the resin-based adhesive. Both adhesives had 4 times more bracket failures when opposing occlusion was present. The resin-based product demonstrated a higher proportion of resin-to-enamel adhesive failures than did the RMGI. Compared with the resin-based adhesive, the RMGI-bracketed teeth showed improved clinical performance, no enamel surface loss, less enamel demineralization, and faster adhesive removal. However, the RMGI had a 2.6 times greater bracket-failure rate than did the resin-based product.
authors.affiliation: Midland Health Board Dental Clinic, Tullamore, Ireland. mhborthodontics@hotmail.com
authors.forename: David J
authors.initials: DJ
authors.lastname: Hegarty
authors.forename: Tatiana V
authors.initials: TV
authors.lastname: Macfarlane
mesh_terms: D000293:Adolescent; D001840:Dental Bonding; D017005:Dental Debonding; D004868:Equipment Failure; D005260:Female; D005899:Glass Ionomer Cements; D006801:Humans; D008297:Male; D016910:Orthodontic Brackets; D016016:Proportional Hazards Models; D019279:Resin Cements; D012117:Resins, Synthetic; D012307:Risk Factors; D013193:Stainless Steel; D018709:Statistics, Nonparametric; D016019:Survival Analysis; D017001:Tooth Demineralization / Q000517:prevention & control
chemical_list: C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; C097531:Rely a Bond system; D019279:Resin Cements; D012117:Resins, Synthetic; D013193:Stainless Steel