This Article Abstract Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Daronch, M. Articles by Giudici, R. Search for Related Content PubMed PubMed Citation Articles by Daronch, M. Articles by Giudici, R. Social Bookmarking                         What's this?

Polymerization Kinetics of Pre-heated Composite

¹ Department of Dental Materials, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil;
² Dental Materials Section, Department of Oral Rehabilitation, Medical College of Georgia, Augusta, GA 30912-1260, USA;
³ Department of Restorative Dentistry, Dental School of Piracicaba at UNICAMP, Piracicaba, SP, Brazil; and
⁴ Department of Chemical Engineering, Polytechnic School, University of São Paulo, São Paulo, SP, Brazil

View larger version (20K): [in this window] [in a new window]   Figure 1. Conversion with time at the top surface and at 2-mm depth with 20-second exposure duration at pre-selected composite temperatures. n = 5 specimens per experimental group. Coefficient of variation ranged from 0.3 to 3.0%.

View larger version (40K): [in this window] [in a new window]   Figure 2. Conversion rate with time at the top surface and at 2-mm depth, at selected temperatures and exposure durations: (A) 40 sec, (B) 20 sec, (C) 10 sec, and (D) 5 sec, (E) natural log of Rpmax as a function of inverse temperature. A linear fit to the data was used to determine the activation energy (15.6 kJ/mol). (F) Natural log of conversion rate as a function of inverse temperature and monomer conversion at the top surface and (G) at 2-mm depth. For A–D, data at each one-second time point represent the mean of 5 replications; coefficient of variation ranged from 3.1 to 17.6%.

View larger version (34K): [in this window] [in a new window]   Figure 3. Conversion rate as a function of monomer conversion obtained at the top surface and at 2-mm depth for various temperatures and exposure durations: (A) 40 sec, (B) 20 sec, (C) 10 sec, and (D) 5 sec. Each datapoint represents mean of 5 replications; coefficient of variation ranged from 6.0 to 36.4%.

Journal of Dental Research, Vol. 85, No. 1, 38-43 (2006)
DOI: 10.1177/154405910608500106


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?