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MeSH Review

Hardness Tests

 
 
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High impact information on Hardness Tests

  • The experiment revealed that the depth of cure test does not and the Knoop hardness test does discriminate between LCUs, used for the polymerization of composites containing photoinitiators in addition to camphorquinone [1].
  • Evaluation of the mechanical properties of some dental composite materials, Compact, Finesse and Prisma-Fil based on bisphenol glycidyl methacrylate resin was undertaken by applying compression, tension and hardness tests [2].
  • Both the temperature change data and results of the Knoop hardness test were submitted to ANOVA and Tukey's test at the 5% significance level [3].
  • Autopolymerizing methyl-methacrylate resin (Unifast II) was polymerized under the following conditions: in air and water with/without pressure at 10, 23, 30, 40, 60 and 80 degrees C. The resin specimens were subjected to a transverse test (three-point flexural test) and micro-Brinell surface hardness test [4].
  • In the enamel cross-sectional hardness tests, significant differences (p < 0.05) in relation to area of mineral loss were observed only when sucrose exposure was 8 times/day [5].
 

Associations of Hardness Tests with chemical compounds

References

  1. Photoinitiator dependent composite depth of cure and Knoop hardness with halogen and LED light curing units. Uhl, A., Mills, R.W., Jandt, K.D. Biomaterials (2003) [Pubmed]
  2. Effect of temperature and ageing on the mechanical properties of dental polymeric composite materials. Kandil, S.H., Kamar, A.A., Shaaban, S.A., Taymour, N.M., Morsi, S.E. Biomaterials (1989) [Pubmed]
  3. Temperature change and hardness with different resin composites and photo-activation methods. Schneider, L.F., Consani, S., Sinhoreti, M.A., Sobrinho, L.C., Milan, F.M. Operative dentistry. (2005) [Pubmed]
  4. Effect of curing environment on mechanical properties and polymerizing behaviour of methyl-methacrylate autopolymerizing resin. Ogawa, T., Hasegawa, A. Journal of oral rehabilitation. (2005) [Pubmed]
  5. In situ study of sucrose exposure, mutans streptococci in dental plaque and dental caries. Cury, J.A., Francisco, S.B., Del Bel Cury, A.A., Tabchoury, C.P. Brazilian dental journal. (2001) [Pubmed]
  6. Hardness test of two titanium ceramometals. King, A.W., Gilbert, J.L. Northwestern dental research. (1994) [Pubmed]
  7. Torsional properties of stainless-steel and nickel-titanium files after multiple autoclave sterilizations. Hilt, B.R., Cunningham, C.J., Shen, C., Richards, N. Journal of endodontics. (2000) [Pubmed]
  8. An investigation into the role of oxygen free radical scavengers in preventing polymethylmethacrylate-induced necrosis in an osteoblast cell culture. Kennedy, J.G., O'Grady, P., McCarthy, D.R., Johnson, S.J., Hynes, D., Walsh, M., McManus, F.M., Salih, E., Gouverneur, M., Fitzpatrick, J. Orthopedics. (2000) [Pubmed]
  9. Reinforcement mechanism of dentin mechanical properties by intracanal medicaments. Nakano, F., Takahashi, H., Nishimura, F. Dental materials journal. (1999) [Pubmed]
  10. Material removal during the sliding of hydroxyapatite against UHMWPE. Mazeau, G., Czernuszka, J.T. Bio-medical materials and engineering. (2001) [Pubmed]
 
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