PMID- 20623778
OWN - NLM
STAT- MEDLINE
DCOM- 20140422
LR  - 20130813
IS  - 1097-0029 (Electronic)
IS  - 1059-910X (Linking)
VI  - 74
IP  - 3
DP  - 2011 Mar
TI  - Influence of Er:YAG laser frequency on dentin caries removal capacity.
PG  - 281-6
LID - 10.1002/jemt.20902 [doi]
AB  - The purposes of this study were to evaluate in vitro the influence of different 
      frequencies of Er:YAG laser on the human dentin caries removal capacity. Thirty 
      fragments obtained from third molars were randomly assigned into three groups (n 
      = 10) according to the laser frequency used: 4, 6, and 10 Hz. The caries lesion 
      (+/-1 mm deep) was induced before the irradiation by S.mutans cultures for 6 weeks. 
      The specimens of all groups were irradiated with 200 mJ of energy in noncontact 
      and focused mode under constant refrigeration (water flow: 2.5 mL/min). 
      Quantitative analysis of the caries removal was performed by DIAGNOdent and the 
      Axion Vision software. Qualitative analysis was performed by Scanning electron 
      microscope (SEM) and light microscope (LM). Data were analyzed by ANOVA and 
      Fishers' tests. The DIAGNOdent revealed that the caries removal was similar with 
      4 and 6 Hz and was superior with 10 Hz (P < 0.05). The analysis with Axion 
      Vision software revealed that the caries removal was similar with 6 and 10 Hz 
      and the 4 Hz group promoted the lowest caries removal. Through SEM morphologic 
      analysis, some specimens irradiated with 4 Hz presented, under the demineralized 
      dentin, a disorganized collagenous matrix. The LM images revealed that all 
      frequencies used promoted irregular caries removal, being observed over 
      preparations with 6 and 10 Hz. It can be concluded that the increase of Er:YAG 
      laser frequency provided a higher dentin caries removal without selectivity to 
      the disorganized dentin.
CI  - Copyright (c) 2010 Wiley-Liss, Inc.
FAU - Raucci-Neto, Walter
AU  - Raucci-Neto W
AD  - Department of Restorative Dentistry, School of Dentistry of Ribeirao Preto, 
      University of Sao Paulo, Ribeirao Preto, SP, Brazil. rgpalma@forp.usp.br, 
      rauccineto@yahoo.com.br.
FAU - Chinelatti, Michelle Alexandra
AU  - Chinelatti MA
FAU - Ito, Izabel Yoko
AU  - Ito IY
FAU - Pecora, Jesus Djalma
AU  - Pecora JD
FAU - Palma-Dibb, Regina Guenka
AU  - Palma-Dibb RG
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Microsc Res Tech
JT  - Microscopy research and technique
JID - 9203012
SB  - IM
MH  - Dental Caries/*therapy
MH  - Dentin/*radiation effects
MH  - Humans
MH  - Lasers, Solid-State/*therapeutic use
MH  - Light
MH  - Molar, Third/radiation effects
OTO - NOTNLM
OT  - Er:YAG laser
OT  - LM
OT  - SEM
OT  - caries removal
EDAT- 2010/07/14 06:00
MHDA- 2014/04/23 06:00
CRDT- 2010/07/13 06:00
PHST- 2010/03/09 00:00 [received]
PHST- 2010/06/06 00:00 [accepted]
PHST- 2010/07/13 06:00 [entrez]
PHST- 2010/07/14 06:00 [pubmed]
PHST- 2014/04/23 06:00 [medline]
AID - 10.1002/jemt.20902 [doi]
PST - ppublish
SO  - Microsc Res Tech. 2011 Mar;74(3):281-6. doi: 10.1002/jemt.20902.