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Curing depth of (polyacid-modified) composite resins determined by scraping and a penetrometer
- Source :
-
Dental Materials . Dec2004, Vol. 20 Issue 10, p908-914. 7p. - Publication Year :
- 2004
-
Abstract
- Objectives: The present study aimed to compare the curing depth of polyacid-modified composite resins (PAM-C) and some representative composite resins as a function of shade and post-cure using a scraping method and a penetrometer.Methods: The curing depth of the PAM-C Hytac, F2000, Glasiosite, Dyract, Dyract AP, and Compoglass F and of the composite resins Durafill VS and Z100 were determined for shade A2 and A4 using a scraping method based on ISO 4049:2000 and a digital penetrometer. Samples were light-cured (800 mW/cm2 at 40 s) in bulk in split stainless steel molds. Immediately after light-curing or after a 24 h post-cure, the height of the cylinder of cured material was measured and taken as the curing depth.Results: For both test methods, the curing depth was independent of post-cure <f>(P≥0.05),</f> but differed significantly among materials and shade <f>(P<0.001).</f> Moreover, there was a significant interaction between the latter <f>(P<0.001).</f> Regression analysis generally demonstrated that there was no significant systematic or proportional difference between the test methods. The curing depths of the PAM-C F2000 and Glasiosite were comparable to that of the hybrid composite Z100, but greater than the curing depth of the microfilled composite Durafill VS. The PAM-C Dyract AP, Dyract, Compoglass F and Hytac had a curing depth smaller than that of the microfilled composite.Significance: The scraping method based on ISO 4049:2000 and a digital penetrometer give comparable curing depths for PAM-C. The curing depth greatly varies among the materials and can be considerably smaller than that of a microfilled composite resin. Shade A2 results in significantly greater values for the curing depth compared to shade A4, the effect depending quantitatively on the formulation of the material. [Copyright &y& Elsevier]
- Subjects :
- *PENETROMETERS
*REGRESSION analysis
*TESTING equipment
*TEST methods
Subjects
Details
- Language :
- English
- ISSN :
- 01095641
- Volume :
- 20
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Dental Materials
- Publication Type :
- Academic Journal
- Accession number :
- 14786767
- Full Text :
- https://doi.org/10.1016/j.dental.2004.01.001