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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/50546

Title: DISINFECTION PROCEDURES: THEIR EFFICACY AND EFFECT ON DIMENSIONAL ACCURACY, SURFACE QUALITY AND SURFACE DETAIL REPRODUCTION OF AN IRREVERSIBLE HYDROCOLLOID IMPRESSION MATERIAL
Author: O'DONNELL, MARY J
O'SULLIVAN, MICHAEL
COLEMAN, DAVID
Author's Homepage: http://people.tcd.ie/mjodonne
http://people.tcd.ie/misullvn
http://people.tcd.ie/dcoleman
Keywords: Dental Science
dental impressions
Issue Date: 2011
Citation: RENTZIA A, COLEMAN DC, O'DONNELL MJ, DOWLING AH, O'SULLIVAN M, DISINFECTION PROCEDURES: THEIR EFFICACY AND EFFECT ON DIMENSIONAL ACCURACY, SURFACE QUALITY AND SURFACE DETAIL REPRODUCTION OF AN IRREVERSIBLE HYDROCOLLOID IMPRESSION MATERIAL, JOURNAL OF DENTISTRY, 39, 2, 2011, 133 - 140
Series/Report no.: JOURNAL OF DENTISTRY
39
2
Abstract: Objectives: This study investigated the antibacterial efficacy and effect of 0.55% ortho-phthalaldehyde (Cidex OPA®) and 0.5% sodium hypochlorite (NaOCl) on the dimensional accuracy and surface quality of gypsum casts retrieved from an irreversible hydrocolloid impression material. Methods: A simulated clinical cast and technique was developed to compare the dimensional accuracy and surface quality changes of the test gypsum casts with controls. Dimensional accuracy measurements were completed between fixed points using a travelling microscope under low angle illumination at a magnification of X3. Surface quality changes of “smooth” and “rough” areas on the cast were evaluated by means of optical profilometry. The efficacy of the disinfection procedures against Pseudomonas aeruginosa was evaluated by determining the number of colony forming units (cfu) recovered after disinfection of alginate discs inoculated with 1 × 106 cfu for defined intervals. Results: The dimensional accuracy of the gypsum casts was not significantly affected by the disinfection protocols. Neither disinfectant solution nor immersion time had an effect on the surface roughness of the “smooth” area on the cast, however, a significant increase in surface roughness was observed with increasing immersion time for the “rough” surface. Complete elimination of viable Pseudomonas aeruginosa cells from alginate discs was obtained after 30 and 120 s immersion in Cidex OPA® and NaOCl, respectively. Conclusions: Immersion of irreversible hydrocolloid impressions in Cidex OPA® for 30 s was proved to be the most effective disinfection procedure.
Description: PUBLISHED
URI: http://hdl.handle.net/2262/50546
Related links: http://dx.doi.org/10.1016/j.jdent.2010.11.003
Appears in Collections:Dental Science (Scholarly Publications)

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