title: Evaluation of flexural bond strength of porcelain to used nickel-chromium alloy in various percentages.
abstract: OBJECTIVE
  The aim of this in vitro study was to evaluate the flexural bond strength of porcelain to combinations of used and new nickel-chromium alloy in various proportions.
  
  
  METHODS
  Used and new nickel-chromium bonding alloys were combined in various proportions (groups I to V; 10 samples per group) and their flexural bond strengths with porcelain were compared. A three-point loading system was used for the application of load. Load was applied at a constant speed of 0.5 mm/minute and the load required to fracture the porcelain was recorded for each specimen.
  
  
  METHODS
  (a) Analysis of variance (ANOVA) and (b) Duncan's multiple range tests.
  
  
  RESULTS
  The best bond strength values were seen when 100% new alloy was used. According to the findings of this study, there was no adverse effects noted with up to 75% recast metal, but serious changes were found in the bond strength values when 100% old metal was used.
  
  
  CONCLUSIONS
  The following conclusions were drawn from the study Fresh nickel-chromium alloy shows the greatest porcelain adherence.There is no significant change in bond strength of ceramic to alloy with up to 75% of used nickel-chromium alloy.At least 25%- of new alloy should be added when recycled nickel-chromium alloy is being used for metal ceramic restorations.
authors: Department of Prosthodontics, Sinhgad Dental College and Hospital, Pune, Maharashtra, India.
authors: V N V
authors: VN
authors: Madhav
authors: T V
authors: TV
authors: Padmanabhan
authors: R
authors: R
authors: Subramnian
mesh_terms: D000268:Adhesiveness; D000538:Aluminum Silicates / Q000737:chemistry; D002858:Chromium Alloys / Q000737:chemistry*; D001840:Dental Bonding; D003735:Dental Casting Technique; D003760:Dental Impression Materials / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000295:instrumentation; D017743:Equipment Reuse; D006801:Humans; D008422:Materials Testing; D008768:Methylmethacrylates / Q000737:chemistry; D018583:Pliability; D017680:Potassium Compounds / Q000737:chemistry; D013314:Stress, Mechanical
chemical_list: D000538:Aluminum Silicates; D002858:Chromium Alloys; D003760:Dental Impression Materials; C082318:GC Pattern Resin; D008768:Methylmethacrylates; D017680:Potassium Compounds; D003776:Dental Porcelain; C016447:feldspar