Reaction exothermia of 2 relining resins for temporary crowns.

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  • Additional Information
    • Source:
      Publisher: Edizioni Minerva Medica Country of Publication: Italy NLM ID: 0421071 Publication Model: Print Cited Medium: Print ISSN: 0026-4970 (Print) Linking ISSN: 00264970 NLM ISO Abbreviation: Minerva Stomatol Subsets: MEDLINE
    • Publication Information:
      Original Publication: Torino : Edizioni Minerva Medica
    • Subject Terms:
      Composite Resins* ; Crowns*; Dental Restoration, Temporary ; Hot Temperature ; Humans
    • Abstract:
      Aim: The aim of the study was to evaluate the reaction exothermia of 2 relining resins for temporary crowns. The resins used were Duralay, a methacrylate-based resin, and Protemp II, a bisacrylic resin.
      Methods: The coronal parts of an adult molar and of an impacted one were used. Abutments were obtained from the crowns, while the radicular part was sectioned in order to insert a thermocouple into the pulpal chamber. During the experiment the tooth with the polymerising resin was put into an oral cavity simulator to keep a constant temperature. The thermal increase during polymerisation of the 2 resins was recorded for 6 minutes at 5 seconds intervals and with 1 and 2.5 mm dentin thickness (n = 10). Data were statistically analysed by variance analysis with Scheffe test.
      Results: The intrapulpal thermal increase was significantly higher in relation to the type of resin (Duralay p < 0.0001), thickness (1 mm p < 0.0001) and type of dentin (young dentin p < 00001).
      Conclusions: In order to protect the pulp, during the direct relining of a temporary crown, it is recommendable to choose the best combination among resin, type of dentin and its residual thickness, besides adequate cooling techniques.
    • Accession Number:
      0 (Composite Resins)
    • Publication Date:
      Date Created: 20050520 Date Completed: 20060221 Latest Revision: 20081121
    • Publication Date:
      20240829
    • Accession Number:
      15902061