PMID- 18264527
OWN - NLM
STAT- MEDLINE
DCOM- 20080225
LR  - 20220408
IS  - 1526-3711 (Electronic)
IS  - 1526-3711 (Linking)
VI  - 9
IP  - 2
DP  - 2008 Feb 1
TI  - Comparison of the heat generation of light curing units.
PG  - 65-72
AB  - AIM: The aim of this study was to evaluate the heat generation of three different 
      types of light curing units. METHODS AND MATERIALS: Temperature increases were 
      recorded from a distance of 1 mm from a thermocouple to the tip of three 
      different types of light curing units including one quartz-tungsten halogen 
      (QTH), one plasma arc (PAC), and one light emitting diode (LED) unit. An 
      experimental model was designed to fix the 1 mm distance between the tip of the 
      light curing units and the thermocouple wire. Temperature changes were recorded 
      in 10 second intervals up to 40 seconds. (10, 20, 30, and 40 seconds). 
      Temperature measurements were repeated three times for every light curing unit 
      after a one hour standby period. Statistical analysis of the results was 
      performed using the analysis of variance (ANOVA) and the Bonferroni Test. 
      RESULTS: The highest temperature rises (54.4+/-1.65 degrees C) occurred during 
      activation of a PAC light curing unit for every test period (p<.05). The least 
      temperature increase (11.8+/-1.3 degrees C) occurred with a LED curing unit for 
      each tested period except for the measurement of the temperature rise using the 
      QTH curing unit at the tenth second interval (p<.05). CONCLUSION: These results 
      indicate the choice of light activation unit and curing time is important when 
      polymerizing light activated resin based restorations to avoid any thermal damage 
      to the pulp.
FAU - Bagis, Bora
AU  - Bagis B
AD  - Department of Prosthetic Dentistry of the Faculty of Dentistry at Karadeniz 
      Technical University in Trabzon, Turkey. bbagis@yahoo.com
FAU - Bagis, Yildirim
AU  - Bagis Y
FAU - Ertas, Ertan
AU  - Ertas E
FAU - Ustaomer, Seda
AU  - Ustaomer S
LA  - eng
PT  - Comparative Study
PT  - Evaluation Study
PT  - Journal Article
DEP - 20080201
PL  - India
TA  - J Contemp Dent Pract
JT  - The journal of contemporary dental practice
JID - 101090552
RN  - 0 (Composite Resins)
RN  - 0 (Halogens)
RN  - 3H3U766W84 (Xenon)
SB  - IM
MH  - Analysis of Variance
MH  - Composite Resins/*radiation effects
MH  - *Dental Equipment
MH  - Halogens
MH  - Hot Temperature
MH  - *Light
MH  - Phase Transition
MH  - Semiconductors
MH  - Statistics, Nonparametric
MH  - Time Factors
MH  - Xenon
EDAT- 2008/02/12 09:00
MHDA- 2008/02/26 09:00
CRDT- 2008/02/12 09:00
PHST- 2008/02/12 09:00 [pubmed]
PHST- 2008/02/26 09:00 [medline]
PHST- 2008/02/12 09:00 [entrez]
AID - 1526-3711-477 [pii]
PST - epublish
SO  - J Contemp Dent Pract. 2008 Feb 1;9(2):65-72.