Abstract：
:The aim of this study was to compare the effects of Nd:YAG, Er:YAG, and diode lasers on the morphology and permeability of root canal walls. The three laser wavelengths mentioned interact differently with dentin and therefore it is possible that the permeability changes caused will determine different indications during endodontic treatment. Twenty-eight human single-rooted teeth were instrumented up to ISO 40 and divided into four groups: group C, control (GC), non-laser irradiated; group N (GN), irradiated with Nd:YAG laser; group E (GE), with Er:YAG laser and group D (GD) with diode laser. After that, the roots were filled with a 2% methylene blue dye, divided into two halves and then photographed. The images were analyzed using Image J software and the percentage of dye penetration in the cervical, middle, and apical root thirds were calculated. Additional scanning electron microscopy (SEM) analyses were also performed. The analysis of variance (ANOVA) showed significant permeability differences between all groups in the middle and cervical thirds (p < 0.05). The Tukey test showed that in the cervical third, GN presented means of dye penetration statistically significantly lower than all of the other groups. In the middle third, GE and GD showed statistically higher dye penetration means than GC and GN. SEM analysis showed melted surfaces for GN, clean wall surfaces with open dentinal tubules for GE, and mostly obliterated dentinal tubules for GD. Er:YAG (2,094 nm) laser and diode laser (808 nm) root canal irradiation increase dentinal permeability and Nd:YAG (1,064 nm) laser decreases dentin permeability, within the studied parameters.
journal_name
Lasers Med Scijournal_title
Lasers in medical scienceauthors
Esteves-Oliveira M,de Guglielmi CA,Ramalho KM,Arana-Chavez VE,de Eduardo CPdoi
10.1007/s10103-010-0775-zsubject
Has Abstractpub_date
2010-09-01 00:00:00pages
755-60issue
5eissn
0268-8921issn
1435-604Xjournal_volume
25pub_type
杂志文章abstract：:This study aimed to analyze the effects of light-emitting diode (LED) therapy on sternotomy pain and healing in patients who underwent coronary artery bypass grafting (CABG). The patients were followed for 6 months after the surgery to determine their dehiscence. This study was conducted with 90 volunteers who electiv...
journal_title：Lasers in medical science
pub_type： 杂志文章,随机对照试验
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abstract：:Third-degree burn wounds are considered severe injuries because they destroy all the skin layers and may affect subcutaneous tissues, fasciae, muscles, and bones. To favor the healing process of the injured tissues, it is very useful to diminish the occurrence of the inflammatory process. The present study was aimed a...
journal_title：Lasers in medical science
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abstract：:Use of the CO(2) laser (λ = 10.6 μm, continuous wave, defocused) is an established procedure for the treatment of premalignant lesions. Through employment of the sp-mode as well as scanners, thermal laser effects can be reduced but, on the other hand, a lesser degree of destruction of dysplastic cells could lead to an...
journal_title：Lasers in medical science
pub_type： 临床试验,杂志文章
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abstract：:Our objective was to assess the efficacy and safety of combined 10.6 microm and 650 nm laser irradiation on patients with knee osteoarthritis (OA). Forty patients with OA were randomly allocated to an active laser group or to a placebo laser group (20 per group). They either received active or sham laser treatment at ...
journal_title：Lasers in medical science
pub_type： 杂志文章,随机对照试验
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abstract：:The neodymium/yttrium-aluminum-garnet (Nd/YAG) laser has been suggested to repair broken prostheses in the mouth. This study investigated the effects of different dentin thicknesses and air cooling on pulpal temperature rise during laser welding. Three intact human maxillary molars were prepared for full-veneer crown....
journal_title：Lasers in medical science
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journal_title：Lasers in medical science
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journal_title：Lasers in medical science
pub_type： 临床试验,杂志文章
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journal_title：Lasers in medical science
pub_type： 杂志文章
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journal_title：Lasers in medical science
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journal_title：Lasers in medical science
pub_type： 杂志文章,评审
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journal_title：Lasers in medical science
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journal_title：Lasers in medical science
pub_type： 杂志文章,meta分析,评审
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journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-007-0526-y
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journal_title：Lasers in medical science
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journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-002-8268-3
更新日期：2002-01-01 00:00:00
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journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-017-2330-7
更新日期：2017-12-01 00:00:00
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journal_title：Lasers in medical science
pub_type： 杂志文章
doi：10.1007/s10103-016-2096-3
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journal_title：Lasers in medical science
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journal_title：Lasers in medical science
pub_type： 杂志文章,随机对照试验
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journal_title：Lasers in medical science
pub_type： 杂志文章,随机对照试验
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journal_title：Lasers in medical science
pub_type： 杂志文章
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