HOMEPRODUCTSCOMPANYCONTACTFAQResearchDictionaryPharmaSign Up FREE or Login

In vitro evaporative vs. convective water flux across human dentin before and after conditioning and placement of glass-ionomer cements.

AbstractPURPOSE:
To assess the convective and evaporative fluid movement across glass-ionomer treated dentin.
METHODS:
Crown segments made from extracted human teeth, were divided into two groups of 14 teeth each. Each segment was cemented onto a plexiglass slab penetrated by a stainless steel tube, permitting filling of the pulp chamber with water. This set-up was attached to a device that measured fluid movement through the dentin in the crown segment. The experimental design involved repeated measurements of convective and evaporative fluid movements in each of the following conditions: smear layer-covered dentin, conditioned dentin, dentin after placement of one of two glass-ionomers (Fuji IX or Ketac-Molar), with and without a protective coating. The same water fluxes were remeasured after storage of the samples for 24 hours in distilled water.
RESULTS:
Statistical analysis of the results using ANOVA indicated a significant difference between the two measured water fluxes (P < 0.001). There was also a significant difference between the two materials (P < 0.001), with Ketac-Molar allowing higher permeability than Fuji IX. Conditioning the dentin surface with polyacrylic acid increased the convective water flux (P < 0.05) but did not change the evaporative water flux. Placement of the glass-ionomer material did not change the rate of spontaneous evaporation of water from the dentin, but the application of a coating agent reduced the evaporative water loss. These values were not significantly different when the specimens were stored for 24 hours.
AuthorsSharanbir K Sidhu, Kelli A Agee, Jennifer L Waller, David H Pashley
JournalAmerican journal of dentistry (Am J Dent) Vol. 17 Issue 3 Pg. 211-5 (Jun 2004) ISSN: 0894-8275 [Print] United States
PMID15301221 (Publication Type: Journal Article)
Chemical References
  • Acrylic Resins
  • Dentin-Bonding Agents
  • Glass Ionomer Cements
  • Resins, Synthetic
  • fuji IX
  • ketac-molar
  • carbopol 940
Topics
  • Acrylic Resins (chemistry)
  • Analysis of Variance
  • Convection
  • Dentin (metabolism)
  • Dentin Permeability (physiology)
  • Dentin-Bonding Agents (chemistry)
  • Dentinal Fluid (metabolism)
  • Desiccation
  • Fluid Shifts (physiology)
  • Glass Ionomer Cements (chemistry)
  • Humans
  • Resins, Synthetic (chemistry)
  • Smear Layer
  • Time Factors

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!


Choose Username:
Email:
Password:
Verify Password:
Enter Code Shown: