title: [Strengthening a dental gypsum model by infiltration of cyanoacrylate].
abstract: OBJECTIVE
  To explore a simple but novel method of strengthening gypsum material by cyanoacrylate infiltration. To evaluate the influence of cyanoacrylate on the mechanical properties of dental gypsum models.
  
  
  METHODS
  Gypsum specimens were polished to the dimension of 35 mmx4 mmx4 mm. Butyl-cyanoacrylate was diluted with chloroform at different concentrations, namely 20% and 30% cyanoacrylate. Gypsum specimens were infiltrated by diluting one component of cyanoacrylate at different concentrations for 8 h and then dried for analysis. The changes in elastic modulus, fracture toughness, compressive strength, biaxial strength, brinell hardness were measured. The data were analyzed using software OriginPro 8.
  
  
  RESULTS
  The viscosity measurements indicated that diluted cyanoacrylate were Newtonian fluids and the viscosity increased slightly within the 48 hours of preparation but still similar as water at room temperature, which could be used to infiltrating gypsum. The gypsum infiltrated with cyanoacrylate exhibited good physicochemical properties. The biaxial strength, fracture toughness, compressive strength and brinell hardness of the gypsum were improved by 39%, 30%, 63% and 18%, respectively.
  
  
  CONCLUSIONS
  Cyanoacrylate can significantly improve the strength of gypsum model which indicates the potential clinical application.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wei
authors.forename: Yuan
authors.initials: Y
authors.lastname: Gao
authors.forename: Jin
authors.initials: J
authors.lastname: Lü
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.forename: Jinsong
authors.initials: J
authors.lastname: Liu
mesh_terms: D002133:Calcium Sulfate; D003487:Cyanoacrylates; D006244:Hardness; D003765:Models, Dental
chemical_list: D003487:Cyanoacrylates; D002133:Calcium Sulfate