PMID- 18264528
OWN - NLM
STAT- MEDLINE
DCOM- 20080225
LR  - 20131121
IS  - 1526-3711 (Electronic)
IS  - 1526-3711 (Linking)
VI  - 9
IP  - 2
DP  - 2008 Feb 1
TI  - Sorption and solubility of composites cured with quartz-tungsten halogen and 
      light emitting diode light-curing units.
PG  - 73-80
AB  - AIM: The objective of this study was to evaluate the effect of light 
      polymerization on water sorption and solubility of hybrid composites. METHODS AND 
      MATERIALS: Three composite resins were used to make discs cured with either 
      quartz-tungsten halogen (QTH) or light emitting diode (LED) curing units. The 
      specimens were stored in a desiccator at 37 degrees C and weighted to a constant 
      mass, then immersed in deionized water for different periods of time, and 
      reconditioned until achieving a constant mass. Sorption and solubility were 
      calculated and subjected to analysis of variance (ANOVA) and Tukey tests 
      (p<0.01). RESULTS: There were no statistically significant differences between 
      the light sources. Water sorption increased with storage time for all the 
      composites. The lowest sorption was observed for Herculite XRV, followed by 
      Tetric Ceram, and Filtek Z250. Increased storage times reduced the solubility of 
      Filtek Z250 but did not affect the solubility of Herculite XRV and Tetric Ceram. 
      CONCLUSION: Water sorption and solubility of composites are not affected by the 
      type of polymerization when the same intensity and exposure times are used. Thus, 
      the differences found are probably related to the composition of the materials. 
      CLINICAL SIGNIFICANCE: Water sorption and solubility of composites can lead to a 
      shortened service life. However, these properties are not correlated to the type 
      of polymerization.
FAU - Archegas, Luci Regina P
AU  - Archegas LR
AD  - Technological School at the Federal University of Parana in Curitiba, PR, Brazil. 
      luci.archegas@ufpr.br
FAU - Caldas, Danilo B M
AU  - Caldas DB
FAU - Rached, Rodrigo N
AU  - Rached RN
FAU - Vieira, Sergio
AU  - Vieira S
FAU - Souza, Evelise M
AU  - Souza EM
LA  - eng
PT  - Comparative 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 (Filtek Z250)
RN  - 0 (Halogens)
RN  - 0 (Resin Cements)
RN  - 0 (Tetric ceram)
RN  - 059QF0KO0R (Water)
RN  - 117681-12-6 (Herculite XR)
SB  - IM
MH  - Absorption
MH  - Analysis of Variance
MH  - Composite Resins/*chemistry/*radiation effects
MH  - *Dental Equipment
MH  - Halogens
MH  - *Light
MH  - Materials Testing
MH  - Phase Transition
MH  - Resin Cements/chemistry/radiation effects
MH  - Semiconductors
MH  - Solubility
MH  - Statistics, Nonparametric
MH  - Time Factors
MH  - Water
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 - 1526-3711-478 [pii]
PST - epublish
SO  - J Contemp Dent Pract. 2008 Feb 1;9(2):73-80.