title: Influence of technique and manipulation on self-adhesive resin cements used to cement intraradicular posts.
abstract: BACKGROUND
  Resin cements are widely used to cement intraradicular posts, but bond strength is significantly influenced by the technique and material used for cementation.
  
  
  OBJECTIVE
  The purpose of this study was to evaluate the bond strength of 3 self-adhesive cements used to cement intraradicular glass fiber posts. The cements all required different application and handling techniques.
  
  
  METHODS
  Forty-five human maxillary canines were selected and randomly divided into 3 groups n= 15 by drawing lots: Group BIS - Biscem, Group BRE - Breeze, and Group MAX - Maxcem. Each group was divided into 3 subgroups according to application and handling techniques: Sub-group A - Automix/Point tip applicator, Sub-group L - Handmix/Lentulo, and Sub-group C - Handmix/Centrix. Cementation of the posts was performed according to the manufacturers' instructions. The push-out test was performed with a crosshead speed of 0.5 mm/min, and bond strength was expressed in megapascals. The results were evaluated by 2-way ANOVA and the all pairwise multiple comparison procedures (Tukey test) (α=.05).
  
  
  RESULTS
  Breeze cement showed the highest average for the subgroups A, L, and C when compared to the Biscem cement and Maxcem Elite (P<.05). Statistically significant differences among the subgroups were only observed for Biscem.
  
  
  CONCLUSIONS
  This study shows that application and handling techniques may influence the bond strength of different self-adhesive cements when used for intraradicular post cementation.
authors.affiliation: Department of Prosthodontics, Bauru Dental School, University of Sao Paulo, Brazil.
authors.forename: Fábio Kenji
authors.initials: FK
authors.lastname: Shiratori
authors.forename: Accácio Lins do
authors.initials: AL
authors.lastname: Valle
authors.forename: Thiago Amadei
authors.initials: TA
authors.lastname: Pegoraro
authors.forename: Ricardo Marins
authors.initials: RM
authors.lastname: Carvalho
authors.forename: Jefferson Ricardo
authors.initials: JR
authors.lastname: Pereira
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000268:Adhesiveness; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002484:Cementation / Q000295:instrumentation / Q000379:methods*; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003799:Dental Stress Analysis / Q000295:instrumentation; D005898:Glass / Q000737:chemistry; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry*; D018915:Root Canal Preparation / Q000379:methods; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; C542562:BisCem cement; D003188:Composite Resins; C515955:Maxcem; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D019279:Resin Cements; C584659:breeze cement; C009753:fiberglass; C029824:urethane dimethacrylate luting resin; C020946:triethylene glycol dimethacrylate; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C005044:hydroxyethyl methacrylate; C031172:4-META resin