PMID- 23182792
OWN - NLM
STAT- MEDLINE
DCOM- 20131227
LR  - 20130215
IS  - 1879-0097 (Electronic)
IS  - 0109-5641 (Linking)
VI  - 29
IP  - 3
DP  - 2013 Mar
TI  - Non-destructive characterization of voids in six flowable composites using 
      swept-source optical coherence tomography.
PG  - 278-86
LID - S0109-5641(12)00461-7 [pii]
LID - 10.1016/j.dental.2012.11.004 [doi]
AB  - OBJECTIVE: The aim of this study was to evaluate the void frequency (V(F)) and 
      void volume (V(V)) in different flowable composites using swept-source optical 
      coherence tomography (SS-OCT). METHODS: Standard class I cavities were prepared 
      and filled with six different flowable composites: Clearfil Majesty LV (MJ; 
      Kuraray), MI Flow (MW; GC), MI Fil (ML; GC), Beautifil flow plus (BF; Shofu), 
      Palfique Estelite low flow (EL; Tokuyama) and Surefil SDR flow (SF; Dentsply). 
      The restorations were scanned under OCT. The OCT tomograms were analyzed and 
      average V(F) and V(V) per restoration for each composite were calculated. 
      Scanning electron microscope (SEM) was used to observe the structure of each 
      composite. In addition, the flowability of the materials was evaluated measuring 
      the displacement of each material placed up-right on a glass slide. V(F) and V(V) 
      obtained by OCT were also compared to those calculated using micro-computed 
      tomography (micro-CT). RESULTS: Kruskal-Wallis ANOVA and Mann-Whitney U tests 
      revealed significantly different V(F) and V(V) values (p<0.05) among the 
      composites. Voids ranging from 35 to 785 mum in diameter were detected in OCT 
      tomograms. MJ showed highest V(F) and V(V) values followed by MW, but ML, BF, EL 
      and SF showed no significant difference. Filler volume in composites showed a 
      positive correlation with void formation, but flowability did not show a specific 
      trend. Micro-CT evaluation validated the V(F) and V(V) calculation by OCT, with a 
      significant correlation in void size (p<0.001, r=0.94). CONCLUSION: The results 
      of this study indicate the reliability of SS-OCT for real-time void 
      characterization of composite materials and restorations. Void formation in 
      flowable composites is material dependent.
CI  - Copyright (c) 2012 Academy of Dental Materials. Published by Elsevier Ltd. All 
      rights reserved.
FAU - Nazari, Amir
AU  - Nazari A
AD  - Cariology and Operative Dentistry, Graduate School of Medical and Dental 
      Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 
      113-8549, Japan.
FAU - Sadr, Alireza
AU  - Sadr A
FAU - Saghiri, Mohammad Ali
AU  - Saghiri MA
FAU - Campillo-Funollet, Marc
AU  - Campillo-Funollet M
FAU - Hamba, Hidenori
AU  - Hamba H
FAU - Shimada, Yasushi
AU  - Shimada Y
FAU - Tagami, Junji
AU  - Tagami J
FAU - Sumi, Yasunori
AU  - Sumi Y
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20121124
PL  - England
TA  - Dent Mater
JT  - Dental materials : official publication of the Academy of Dental Materials
JID - 8508040
RN  - 0 (Composite Resins)
MH  - Analysis of Variance
MH  - Animals
MH  - Cattle
MH  - Composite Resins/*chemistry
MH  - Dental Cavity Preparation
MH  - Dental Restoration, Permanent/*methods
MH  - Microscopy, Electron, Scanning
MH  - Reproducibility of Results
MH  - *Tomography, Optical Coherence/methods
MH  - X-Ray Microtomography/methods
EDAT- 2012/11/28 06:00
MHDA- 2013/12/29 06:00
CRDT- 2012/11/28 06:00
PHST- 2012/03/19 00:00 [received]
PHST- 2012/10/10 00:00 [revised]
PHST- 2012/11/02 00:00 [accepted]
PHST- 2012/11/28 06:00 [entrez]
PHST- 2012/11/28 06:00 [pubmed]
PHST- 2013/12/29 06:00 [medline]
AID - S0109-5641(12)00461-7 [pii]
AID - 10.1016/j.dental.2012.11.004 [doi]
PST - ppublish
SO  - Dent Mater. 2013 Mar;29(3):278-86. doi: 10.1016/j.dental.2012.11.004. Epub 2012 
      Nov 24.