Glass ionomer cements used as bonding materials for metal orthodontic brackets. An in vitro study.
The forces required to debond orthodontic brackets on human teeth were studied in vitro. The brackets were bonded with different glass ionomer cements (GICs), and a composite resin (Concise). The shear force required to remove the brackets was recorded at different time intervals after bonding. The bond strength was considerably lower for the GICs compared with brackets bonded with the composite resin, at all time intervals that were studied. Moreover, the bond strength increased more slowly for the GICs compared with the resin. Different GICs displayed a varying setting time. The bonding strength of GICs increased more than 50 per cent between 10 and 20 minutes setting time.
Oen
J O
JO
Department of Orthodontics and Facial Orthopedics, School of Dentistry, University of Bergen, Norway.
Gjerdet
N R
NR
Wisth
P J
PJ
D000180:Acrylic Resins / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins / Q000737:chemistry*; D003722:Dental Alloys / Q000737:chemistry*; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D009967:Orthodontic Appliances; D019279:Resin Cements; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013718:Tensile Strength; D013997:Time Factors
D000180:Acrylic Resins; D003188:Composite Resins; D003722:Dental Alloys; D003738:Dental Cements; D005899:Glass Ionomer Cements; D019279:Resin Cements; D013193:Stainless Steel; C067790:Vitrabond; D017438:Bisphenol A-Glycidyl Methacrylate; C041330:Scotchbond