title: Evaluation and comparison of resistance to compression of various interocclusal recording media: an in vitro study.
abstract: BACKGROUND
  This in vitro study was conducted to compare the compression resistance of various interocclusal recording materials when subjected to a compressive load.
  
  
  METHODS
  Each interocclusal recording material was manipulated according to the manufacturer instruction and placed into a metallic cylinder. A total of 20 specimens for each interocclusal recording material were made. A total 100 specimens were fabricated. Each specimen was placed in the Universal Testing Machine exerting pressure on it, and a force of 100 g/cm(2) was exerted on each sample. 30 s later the reading of the Universal Testing Machine was recorded using a vertical traveling micrometer microscope with an accuracy of ± 0.001 mm. This value was marked as reading "A." 60 s after the application of the first force (100 g/cm(2)), a second force of 1000 g/cm(2) was applied gradually during an interval of 10 s. 30 s later the reading of the Universal Testing Machine exerting pressure on the specimen was recorded again. This value was marked as reading "B." The difference between readings "A" and "B" recorded the compression to resistance of each material. Comparisons within the groups and between the groups were done by using one-way ANOVA and Tukey's HSD test.
  
  
  RESULTS
  There was significant variation between all interocclusal bite registration materials. According to the mean valve of each interocclusal bite registration material, Polyvinylsiloxane Bite Registration Material have better resistance to compression followed by Polyether interocclusal bite registration material, Aluwax Bite, and Impression Wax, Modeling Wax and at last Zinc Oxide Eugenol Impression Paste.
  
  
  CONCLUSIONS
  Polyvinylsiloxane interocclusal registration material had the greatest resistance to compression. The least resistance to compression was noticed with zinc oxide-eugenol paste.
authors.affiliation: Professor and Head, Department of Prosthodontics, RishiRaj College of Dental Sciences and Research Centre, Bhopal, Madhya Pradesh, India.
authors.forename: G S
authors.initials: GS
authors.lastname: Chandu
authors.affiliation: Post-graduate Student, Department of Prosthodontics, RishiRaj College of Dental Sciences and Research Centre, Bhopal, Madhya Pradesh, India.
authors.forename: Mohd Faisal
authors.initials: MF
authors.lastname: Khan
authors.affiliation: Reader, Department of Prosthodontics, RishiRaj College of Dental Sciences and Research Centre, Bhopal, Madhya Pradesh, India.
authors.forename: S K
authors.initials: SK
authors.lastname: Mishra
authors.affiliation: Post-graduate Student, Department of Prosthodontics, RishiRaj College of Dental Sciences and Research Centre, Bhopal, Madhya Pradesh, India.
authors.forename: Pooja
authors.initials: P
authors.lastname: Asnani
keywords: Inter occlusion recording medium; Modeling Wax; polyether; polyvinylsiloxane; zinc oxide-eugenol paste