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Curing depth of different shades of a photo-activated prosthetic composite material

, : Curing depth of different shades of a photo-activated prosthetic composite material. Journal of Oral Rehabilitation 28(7): 618-623

This study determined the depth of cure of different shades of a prosthetic composite material with the aim of evaluating the influence of shade variation on post-curing material properties. Four light shades having small tabs (A1, B1, C1 and D2) and four dark shades having higher tabs (A4, B4, C4 and D4) of a prosthetic composite (Artglass) for body paste based on the Vita Lumin Shade guide were selected. Specimens of each shade were exposed with the proprietary photo-curing unit (UniXS) for periods 20, 30, 60 and 90 s. The curing depth of the material for each shade was determined with a scraping technique described by the International Organization for Standardization (ISO 4049), and average values of groups of five specimens were compared using analysis of variance (ANOVA) and Scheffe's S intervals (P < 0.05). The L*a*b* colour parameters of five specimens after 90 s exposure were measured using a small-area dental colorimeter (ShadeEye) in order to determine the colorimetric differences. Three-factor ANOVA revealed that the depth of cure was influenced by shade letter (A, B, C or D) and shade tab (1 and 2, or 4) as well as by the exposure period (P=0.05). Curing depth of the light shades was consistently greater than that of the dark shades. Among the eight shades selected, B1 shade demonstrated the greatest curing depth, while A4 shade exhibited the lowest curing depth. For all shades, longer exposure increased the depth of cure. All of the light shades exhibited higher L* values than any of the four dark shades. Curing depth of the composite material was found to be related to the Vita shade variation and the exposure period.


PMID: 11422692

Other references

Ellouali, F.; Berkchi, F.; Bayahia, R.; Benamar, L.; Cherti, M., 2016: Comparison of the Effects of Dialysis Methods (Haemodialysis vs Peritoneal Dialysis) on Diastolic Left Ventricular Function Dialysis Methods and Diastolic Function. In patients undergoing chronic dialysis, several factors appear to influence the occurrence of cardiac abnormalities. The aim of our study was to evaluate the effects of two different methods of renal replacement therapy (chronic haemodialysis (HD...

Schultz, R.E.; Boyle, D.E., 1988: Inverted papilloma of renal pelvis associated with contralateral ureteral malignancy and bladder recurrence. We report a case of an inverted papilloma of the renal pelvis diagnosed at the same time as transitional cell carcinoma of the contralateral ureter. The diagnostic studies and surgical management are presented. Recurrence of an inverted papilloma...

Frahm, J.P., 1975: Taxonomic notes on the genus campylopus. As a result of various taxonomic studies in the genus Campylopus Brid. the following taxa were revised: C. lepidophyllus (C. Muell.) Jaeg. from South Africa is synonymous with C. introflexus (Hedw.) Brid., C. puiggarii (Geh. et Hamp.) Par. from Br...

Zhu, J., 1987: Microdiffraction and analysis. The intensity distribution in the microdiffraction pattern depends strongly on the coherence of the illuminated source. The coherence width at the specimen level is considered as a parameter to check the coherence of an electron microscope. Two ap...

Froese, R., 1999: The good, the bad, and the ugly: a critical look at species and their institutions from a user's perspective. Reviews in Fish Biology and Fisheries. December; 94: 375-378

Worthington-Smith, P.S., 1967: Pre-cooling of fruit within the main storage chamber. The main features of cold store design are discussed: viz., cooler equipment and its control; air quantity and speeds; and cold room management. Actual readings are presented for the temperature of the fruit (core), air entering the cooler, air en...

Wallace H.Campbell, 1967: Low attenuation of hydromagnetic waves in the ionosphere and implied characteristics in the magnetosphere for pc 1 events. Journal of Geophysical Research 72(13): 3429

Lee, S.Hoon.; Kim, K.Hyun.; Cheong, S-Mee.; Kim, S.; Kooh, M.; Chin, D.Kyu., 2011: A comparison of the effect of epidural patient-controlled analgesia with intravenous patient-controlled analgesia on pain control after posterior lumbar instrumented fusion. Retrospective analysis to compare the effect and complication of epidural patient-controlled analgesia (epidural PCA) with intravenous patient-controlled analgesia (IV PCA) for the treatment of the post-operative pain after posterior lumbar instru...

Zhang, Q.; Sandvol, E.; Liu, M., 2009: Tomographic pn velocity and anisotropy structure in the central and Eastern United States. A total of 19,166 Pn phase readings from the International Seismological Centre (ISC) and the National Earthquake Information Center (NEIC) catalogs as well as hand-picked arrivals from the Incorporated Research Institutions for Seismology (IRIS)...

Meyer Zum Gottesberge, A., 1956: Otogenous vertigo. Deutsches Medizinisches Journal 7(9-10): 331-334