PMID- 17277826
OWN - NLM
STAT- MEDLINE
DCOM- 20070221
LR  - 20191210
IS  - 1526-3711 (Electronic)
IS  - 1526-3711 (Linking)
VI  - 8
IP  - 2
DP  - 2007 Feb 1
TI  - Radiometric and spectrophotometric analysis of third generation light-emitting 
      diode (LED) light-curing units.
PG  - 43-51
AB  - AIMS: Light-emitting diode (LED) polymerization of dental restorative materials 
      has become increasingly popular. However, individual light-curing unit (LCU) 
      functions (intensity and/or wavelength emission) may not conform to manufacturer 
      specifications due to quality control issues. The purpose of this study was to 
      evaluate the quality of irradiance, in terms of power density (intensity) and 
      spectral distribution (peak wavelength), emitted from LED and quartz-tungsten 
      halogen (QTH) LCUs in vitro. The battery expenditure of these LED units was also 
      tested. METHODS AND MATERIALS: The intensity and spectral distribution from four 
      third generation LED (Smartlite PS, Coltolux LED, radii Plus, Diopower) and one 
      QTH (Schein Visible Cure) light sources were measured using six different dental 
      curing light meters (Coltolux, Cure Right, Demetron 100, Demetron LED., Hilux, 
      and Light Meter-200) and a visible-ultraviolet light spectrophotometer (Hitachi 
      Elmer-Perkins). The battery life was also plotted for each light source following 
      a 1500 second duration period. The data obtained from radiometric and 
      spectrophotometric analysis was compared to manufacturer specifications. RESULTS: 
      Radiometric evaluation revealed LED light units tested did not satisfy 
      manufacturer claims for minimum intensities. Spectral emissions from the LED 
      light sources did meet manufacturer requirements. No clinically appreciable 
      battery drain was evidenced from testing all re-chargeable LED units. CONCLUSION: 
      Despite limitations LED technology appears to be an effective alternative for 
      curing of light-activated esthetic restorative materials. Additional advantages 
      associated with LED curing lights include ergonomic handling capabilities, 
      negative heat generation, and minimal maintenance concerns.
FAU - Owens, Barry M
AU  - Owens BM
AD  - Department of Restorative Dentistry, College of Dentistry, University of 
      Tennessee, Memphis, TN, USA. bowens@utmem.edu
FAU - Rodriguez, Kelbin H
AU  - Rodriguez KH
LA  - eng
PT  - Comparative Study
PT  - Evaluation Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20070201
PL  - India
TA  - J Contemp Dent Pract
JT  - The journal of contemporary dental practice
JID - 101090552
RN  - 0 (Composite Resins)
RN  - 0 (Halogens)
SB  - IM
MH  - Composite Resins/radiation effects
MH  - *Dental Equipment
MH  - Electric Power Supplies
MH  - Halogens
MH  - *Light
MH  - Phase Transition
MH  - Quality Control
MH  - Radiometry
MH  - Semiconductors
MH  - Spectrophotometry
EDAT- 2007/02/06 09:00
MHDA- 2007/02/22 09:00
CRDT- 2007/02/06 09:00
PHST- 2007/02/06 09:00 [pubmed]
PHST- 2007/02/22 09:00 [medline]
PHST- 2007/02/06 09:00 [entrez]
AID - 1526-3711-375 [pii]
PST - epublish
SO  - J Contemp Dent Pract. 2007 Feb 1;8(2):43-51.