title: A Twofold Comparison between Dual Cure Resin Modified Cement and Glass Ionomer Cement for Orthodontic Band Cementation.
abstract: OBJECTIVE
  To test the solubility of dual cure resin modified resin cement in a food simulating solution and the shear bond strength compared to conventional Glass ionomer cement.
  
  
  METHODS
  The materials tested were self-adhesive dual cure resin modified cement and Glass Ionomer (GIC). Twenty Teflon moulds were divided into two groups of tens. The first group was injected and packed with the modified resin cement, the second group was packed with GIC. To test the solubility, each mould was weighed before and after being placed in an analytical reagent for 30 days. The solubility was measured as the difference between the initial and final drying mass. To measure the Shear bond strength, 20 freshly extracted wisdom teeth were equally divided into two groups and embedded in self-cure acrylic resin. Four mm sections of stainless steel bands were cemented to the exposed buccal surfaces of teeth under a constant load of 500 g. Shear bond strength was measured using a computer controlled materials testing machine and the load required to deband the samples was recorded in Newtons.
  
  
  RESULTS
  GIC showed significantly higher mean weight loss and an insignificant lower Shear bond strength, compared to dual cure resin Cement.
  
  
  CONCLUSIONS
  It was found that dual cure resin modified cement was less soluble than glass ionomer cement and of comparable bond strength rendering it more useful clinically for orthodontic band cementation.
authors.affiliation: Suez Canal University, Faculty of Dentistry, Orthodontics, Faculty of Dentistry, Umm al Qura University, Orthodontics, Ismailia - el Gamaa street, Ismailia 0000, Egypt.
authors.forename: Hanaa El
authors.initials: HE
authors.lastname: Attar
authors.affiliation: National Research Center, El Bohouth str., Cairo 12622, Egypt.
authors.forename: Omnia
authors.initials: O
authors.lastname: Elhiny
authors.affiliation: Faculty of Dentistry Fayoum University, Paedoodontics, Fayoum, Egypt.
authors.forename: Ghada
authors.initials: G
authors.lastname: Salem
authors.affiliation: Faculty of Dentistry, MTI University, Cairo, Egypt.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Abdelrahman
authors.affiliation: Faculty of Dentistry, Beni Suef University, Fixed Prosthodontics, Cairo, Egypt.
authors.forename: Mazen
authors.initials: M
authors.lastname: Attia
keywords: band cementation; dual cure resin; glass Ionomer; orthodontic band; solubility