title: Temperature changes caused by light curing units on dentine of primary teeth.
abstract: OBJECTIVE
  This was to determine the temperature changes produced in dentine discs of primary teeth placed below a glass ionomer, microhybrid flow resin or microhybrid resin during the photocuring process with conventional halogen lamps and LEDs at different distances.
  
  
  METHODS
  Experimental design.
  
  
  METHODS
  This in vitro study was carried out in the research laboratory of the Universitat International de Catalunya. We cut 1 mm thick dentine discs with the IsoMet 1000 cutting machine. Thereafter, we cut stainless steel rings of different heights. Subsequently, to facilitate the temperature measurement, we prepared silicone moulds, in which the dentine disc, stainless steel ring and the digital thermometer/ thermocouple were positioned. Once the silicone mould was finished, a 2 mm thick layer of the restorative material was placed on the dentine disc. Finally, the polymerisation process was conducted according to the times recommended by the manufacturers, and the temperature produced was recorded at the end of the procedure. STATISTICAL EVALUATION: Replies were analyzed using the STATGRAPHICS® Plus Version 5.0 statistics software system, in order to obtain comparative diagrams and graphs using the ANOVA multifactorial system.
  
  
  RESULTS
  The photocuring lamps used on the restorative materials produced statistically significant differences in temperature, with p = 0.00001.
  
  
  CONCLUSIONS
  Halogen lamps cause a greater temperature rise in materials than LEDs lamps, and the greatest rise is produced when microhybrid flow resin is photocured with the Optilux 501 halogen lamp.
authors: Department of Paediatric Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain.
authors: A
authors: A
authors: Melara Munguía
authors: M
authors: M
authors: Arregui Gambús
authors: F
authors: F
authors: Guinot Jimeno
authors: L J
authors: LJ
authors: Bellet Dalmau
mesh_terms: D001831:Body Temperature / Q000528:radiation effects; D003188:Composite Resins / Q000009:adverse effects / Q000528:radiation effects; D055117:Curing Lights, Dental / Q000009:adverse effects*; D003738:Dental Cements / Q000009:adverse effects / Q000528:radiation effects*; D003764:Dental Materials / Q000009:adverse effects / Q000528:radiation effects; D003804:Dentin / Q000293:injuries* / Q000528:radiation effects; D005899:Glass Ionomer Cements / Q000009:adverse effects / Q000528:radiation effects; D006358:Hot Temperature / Q000009:adverse effects; D006801:Humans; D008027:Light / Q000009:adverse effects*; D055115:Light-Curing of Dental Adhesives / Q000009:adverse effects*; D014094:Tooth, Deciduous
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D003764:Dental Materials; D005899:Glass Ionomer Cements; C467914:TPH spectrum; C452226:tetric flow composite resin; C067790:Vitrabond