Control and reduction of peak temperature in self-curing resins

Schiavetti, R. and De Vico, G. and Casucci, Andrea and Covello, F. and Ottria, Liliana and Sannino, G. and Barlattani, Alberto (2009) Control and reduction of peak temperature in self-curing resins. Oral & implantology, 2 (3). pp. 21-26. ISSN 2035-2468

Preview

PDF article(2).pdf - Published Version Download (5MB)

Abstract

The aim of this experimental study was to reduce the exothermic reaction during curing of the resins to cold. The significant exotherm generated by the reaction of polymerization of the resin curing involves many clinical complications including the high risk of necrosis against tooth. They were used four different types of self curing resins all based on methyl methacrylate, Jet Kit, Major Dentin, Dura Lay, Temporary Cold. The reaction of polymerization of the resins was done in Teflon pans and was monitored by a thermocouple which recorded the highest level reached by each temperature resin with and without additive. The polymerization reaction took place for each resin in the presence of an essential oil, the terpinolene, which acted as a "chain transfer" and different temperatures were recorded. Resins Dura Lay and Jet kit showed a reduction of very high temperature in the presence of terpinolene, with a statistically significant difference compared to the same reaction without terpinolene Major resin dentin in the presence of the additive has reduced by 8.4°C peak temperature. Resin Temporary Cold has showed benefits with respect to peak temperature, but the reaction was much more 'consistent presence of the additive. DISCUSSION.: The system through which the chain transfer acts to lower the temperature of the reaction is that of chain transfer. Namely that interfere with the reaction of the polymer chains, by transferring these acrylic radicals are no longer active, ie, no longer able to bind to other monomer units, thus avoiding the excessive growth of macromolecules which are those that determine the temperature rise. This leads to the formation of more polymer chains with lower molecular weight.

Item Type:	Article
Uncontrolled Keywords:	Peak temperature, polymerization, resins
Subjects:	600 Tecnologia - Scienze applicate > 610 Medicina e salute (Classificare qui la tecnologia dei servizi medici) > 617 Rami vari della medicina; Chirurgia > 617.6 Odontoiatria
Depositing User:	Nadia Del Gobbo
Date Deposited:	02 Apr 2013 15:03
Last Modified:	14 May 2013 14:28
URI:	http://eprints.bice.rm.cnr.it/id/eprint/4845

Actions (login required)

View Item