PMID- 23919623
OWN - NLM
STAT- MEDLINE
DCOM- 20160408
LR  - 20220331
IS  - 1559-2863 (Electronic)
IS  - 0361-7734 (Linking)
VI  - 39
IP  - 3
DP  - 2014 May-Jun
TI  - Effects of pulsed Nd:YAG laser on tensile bond strength and caries resistance of 
      human enamel.
PG  - 273-82
LID - 10.2341/12-416-L [doi]
AB  - This study aims to evaluate the effects of pulsed Nd:YAG laser on the tensile 
      bond strength (TBS) of resin to human enamel and caries resistance of human 
      enamel. A total of 201 human premolars were used in this in vitro study. A flat 
      enamel surface greater than 4 x 4 mm in area was prepared on each specimen using 
      a low-speed cutting machine under a water coolant. Twenty-one specimens were 
      divided into seven groups for morphology observations with no treatment, 35% 
      phosphoric acid etching (30 seconds), and laser irradiation (30 seconds) of 
      pulsed Nd:YAG laser with five different laser-parameter combinations. Another 100 
      specimens were used for TBS testing. They were embedded in self-cured acrylic 
      resin and randomly divided into 10 groups. After enamel surface pretreatments 
      according to the group design, resin was applied. The TBS values were tested 
      using a universal testing machine. The other 80 specimens were randomly divided 
      into eight groups for acid resistance evaluation. Scanning electron microscope 
      (SEM) results showed that the enamel surfaces treated with 1.5 W/20 Hz and 2.0 
      W/20 Hz showed more etching-like appearance than those with other laser-parameter 
      combinations. The laser-parameter combinations of 1.5 W/15 Hz and 1.5 W/20 Hz 
      were found to be efficient for the TBS test. The mean TBS value of 14.45 +/- 1.67 
      MPa in the laser irradiated group was significantly higher than that in the 
      untreated group (3.48 +/- 0.35 MPa) but lower than that in the 35% phosphoric acid 
      group (21.50 +/- 3.02 MPa). The highest mean TBS value of 26.64 +/- 5.22 MPa was 
      identified in the combination group (laser irradiation and then acid etching). 
      Acid resistance evaluation showed that the pulsed Nd:YAG laser was efficient in 
      preventing enamel demineralization. The SEM results of the fractured enamel 
      surfaces, resin/enamel interfaces, and demineralization depths were consistent 
      with those of the TBS test and the acid resistance evaluation. Pulsed Nd:YAG 
      laser as an enamel surface pretreatment method presents a potential clinical 
      application, especially for the caries-susceptible population or individuals with 
      recently bleached teeth.
FAU - Wen, X
AU  - Wen X
FAU - Zhang, L
AU  - Zhang L
FAU - Liu, R
AU  - Liu R
FAU - Deng, M
AU  - Deng M
FAU - Wang, Y
AU  - Wang Y
FAU - Liu, L
AU  - Liu L
FAU - Nie, X
AU  - Nie X
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130806
PL  - United States
TA  - Oper Dent
JT  - Operative dentistry
JID - 7605679
MH  - Dental Bonding/methods
MH  - Dental Caries/*prevention & control
MH  - Dental Enamel/*radiation effects/surgery/ultrastructure
MH  - Dental Restoration, Permanent/methods
MH  - Humans
MH  - In Vitro Techniques
MH  - Lasers, Solid-State/*therapeutic use
MH  - Microscopy, Electron, Scanning
MH  - Tensile Strength/radiation effects
EDAT- 2013/08/08 06:00
MHDA- 2016/04/09 06:00
CRDT- 2013/08/08 06:00
PHST- 2013/08/08 06:00 [entrez]
PHST- 2013/08/08 06:00 [pubmed]
PHST- 2016/04/09 06:00 [medline]
AID - 10.2341/12-416-L [doi]
PST - ppublish
SO  - Oper Dent. 2014 May-Jun;39(3):273-82. doi: 10.2341/12-416-L. Epub 2013 Aug 6.