title: Retentiveness of metal coping luted to teeth of uremic patients undergoing hemodialysis using five different luting cements.
abstract: OBJECTIVE
  This study aimed to assess the retention of metal copings luted to uremic teeth with five different luting agents.
  
  
  METHODS
  A total of 35 sound natural molars was collected from uremic patients and randomly assigned into five groups (n=7). The teeth were prepared for metal copings using diamond tips and water coolant. Metal copings with a loop on the occlusal surface were fabricated using base metal alloy (Rexillium III). The copings were luted using Fuji I, glass ionomer (GI); Fuji Plus, resin-modified glass ionomer (RMGI); Panavia F 2.0, resin cement; Rely X Unicem, self-adhesive cement (SA); and Adhesor, zinc phosphate cement (ZPh). All specimens were incubated at 37°C for 24 hours, conditioned in artificial saliva for 7 days, and then thermocycled for 5000 cycles (5°C-55°C). The dislodging force was measured using a universal testing machine at a crosshead speed of 2 mm/min. The mode of failure of the loaded adhesive copings was evaluated. Statistical analyses were performed using one-way analysis of variance and Tukey post hoc test.
  
  
  RESULTS
  GI and SA cements had the highest and the lowest mean retentive strength, respectively (580.90±17.3, 406.6±12.7). There was no significant difference between ZPh, SA, and resin cements. These cements were inferior to GI and RMGI cements (p<0.05), which showed statistically similar retentive strengths.
  
  
  CONCLUSIONS
  The results of this study support the use of glass ionomer and resin-modified glass ionomer cements for luting of metal copings to uremic teeth with retentive preparations.
authors.forename: M H
authors.initials: MH
authors.lastname: Ghazy
authors.forename: M M
authors.initials: MM
authors.lastname: Aboumadina
authors.forename: S H
authors.initials: SH
authors.lastname: Mahmoud
mesh_terms: D002858:Chromium Alloys / Q000627:therapeutic use*; D003442:Crowns; D003738:Dental Cements / Q000627:therapeutic use*; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D005899:Glass Ionomer Cements / Q000627:therapeutic use; D006801:Humans; D016876:Metal Ceramic Alloys / Q000627:therapeutic use*; D006435:Renal Dialysis / Q000009:adverse effects*; D014511:Uremia / Q000150:complications* / Q000628:therapy; D015036:Zinc Phosphate Cement / Q000627:therapeutic use
chemical_list: D002858:Chromium Alloys; D003738:Dental Cements; D005899:Glass Ionomer Cements; D016876:Metal Ceramic Alloys; C084541:Fuji glass-ionomer lining cement; C036884:Rexillium III; D015036:Zinc Phosphate Cement