نتایج جستجو برای: laser irradiation

تعداد نتایج: 241615  

Journal: :journal of dentistry, tehran university of medical sciences 0
abbas monzavi associate professor, laser research center of dentistry (lrcd), school of dentistry, tehran university of medical sciences, tehran, iran. sima shahabi associate professor, laser research center of dentistry (lrcd), school of dentistry, tehran university of medical sciences, tehran, iran. reza fekrazad associate professor, laser research center in medical sciences (lrcms), aja university of medical sciences-laser research center of dentistry (lrcd), school of dentistry, tehran university of medical sciences, tehran, iran. roohollah behruzi postgraduate student, department of endodontics, school of dentistry, tehran university of medical sciences, tehran, iran. nasim chiniforush phd candidate of laser dentistry, laser research center of dentistry (lrcd), school of dentistry, tehran university of medical sciences, tehran, iran.

peri-implantitis is one of the most common reasons for implant failure. decontamination of infected implant surfaces can be achieved effectively by laser irradiation; although the associated thermal rise may cause irreversible bone damage and lead to implant loss. temperature increments of over 10ºc during laser application may suffice for irreversible bone damage.the purpose of this study was ...

Journal: :journal of lasers in medical sciences 0
yuji tsuka department of orthodontics, applied life sciences, hiroshima university institute of biomedical & health sciences, hiroshima, japan tadashi fujita department of orthodontics, applied life sciences, hiroshima university institute of biomedical & health sciences, hiroshima, japan maya shirakura department of orthodontics, applied life sciences, hiroshima university institute of biomedical & health sciences, hiroshima, japan ryo kunimatsu department of orthodontics, applied life sciences, hiroshima university institute of biomedical & health sciences, hiroshima, japan shao-ching su department of orthodontics, applied life sciences, hiroshima university institute of biomedical & health sciences, hiroshima, japan eri fujii department of orthodontics, applied life sciences, hiroshima university institute of biomedical & health sciences, hiroshima, japan

introduction: the aim of this study is to evaluate the effects of low-level neodymium-doped yttrium aluminium garnet (nd:yag) laser irradiation on orthodontic tooth movement and histological examination. methods: eleven male wistar rats (aged 10 weeks) were included. to produce experimental tooth movement in rats, 10 g force was applied to maxillary first molars with nickel titanium closed coil...

Journal: :dental research journal 0
seyed mostafa abtahi seyed amir mousavi hooman shafaee behrad tanbakuchi

background: patients undergoing orthodontic treatment experience varying degrees of pain with separator insertion. a survey of patients’ attitude towards orthodontic treatment revealed that pain was the most discouraging factor related to their treatment. moreover, it was the highest ranking reason for wanting to discontinue care. the purpose of this study was to determine the effect of low-lev...

ژورنال: Anatomical Sciences Journal 2004
Bayat, Mohammad, Hoseini, Ahmad, Khosh Vaghti, Amir, Movahedin, Mansoureh, Rezaei, Fateme Sadat, Sadeghi, Yoosef ,

Purpose: Semen freezing is an important technique in human infertility treatment in many different patients but it damages sperms. Low-power lasers are physical agents that have biostimulatory effects. In this study, low-power helium-neon laser's (16J/cm2, one time irradiation) effect on motility and ultrastructure of fresh and frozen-thawed human sperm were studied. Materials and Methods: Thi...

Journal: :journal of lasers in medical sciences 0
horieh moosavi dental material research center, school of dentistry, mashhad university of medical sciences, mashhad, iran sajedeh ghorbanzadeh school of dentistry, mashhad university of medical sciences, mashhad, iran farzaneh ahrari dental research center, school of dentistry, mashhad university of medical sciences, mashhad, iran

introduction: this study investigated the influence of erbium-doped yttrium aluminum garnet (er:yag) laser on microhardness, chemical composition and subsurface morphology of dentin cavity walls. methods: forty sound human premolars were selected and randomly assigned into four groups. class v cavities were prepared either with an er:yag laser (groups 1 and 2; 15 hz, 250 mj for enamel, 10 hz, 2...

Background: Au nanoparticles (AuNPs) exhibit very unique physiochemical and optical properties, which now are extensively studied in a range of medical diagnostic and therapeutic applications. AuNPs can be used for cancer clinical treatment with minimal invasion. On the other hand, curcumin is a polyphenol derived from turmeric which is used for medical purposes due to its anti...

Journal: :journal of lasers in medical sciences 0
massoud seifi elahe vahid-dastjerdi

low-level laser therapy (lllt) provides several benefits for patients receiving orthodontic treatment. according to some literatures, orthodontic tooth movement (otm) can be enhanced but some investigators have reported contradictory results. this article reviews the literature regarding the different aspects of the use of lllt on otm and its alterations. the general data regarding the study de...

 In this paper, the laser ablation process based on the irradiation of nanosecond pulsed lasers on a copper target surface in the presence of Helium gas is studied. The dynamical behaviors of the generated plasma in the helium gas and evaporated copper at the atmospheric pressure are examined using a laser pulse, laser wavelength of and intensity of 7×1010W/cm2. A one-dimensional thermal model ...

Journal: :dental research journal 0
r. birang j. yaghini

introduction dentine hypersensitivity is a common clinical problem in dental practices. so several methods such as, nd: yag laser have been used to treat this problem. previous studies reported that nd:yag laser irradiation on root surface makes some thermal changes, like dentine melting and some other side effects which are related to power of laser irradiation. the aim of our study was to com...

Journal: :journal of lasers in medical sciences 0
guilherme josé pimentel lopes de oliveir univ. estadual paulista - unesp, department of diagnosis and surgery, araraquara school of dentistry, araraquara, sp, brazil. department of health sciences, implantology post graduation course, school of dentistry, university center of araraquara – uniara, araraquara, são paulo, brazil. felipe eduardo pinotti univ. estadual paulista - unesp, department of diagnosis and surgery, araraquara school of dentistry, araraquara, sp, brazil heglécia da luz carvalho univ. estadual paulista - unesp, department of diagnosis and surgery, araraquara school of dentistry, araraquara, sp, brazil. cássio rocha scardueli univ. estadual paulista - unesp, department of diagnosis and surgery, araraquara school of dentistry, araraquara, sp, brazil. rosemary adriana chiérici marcantonio univ. estadual paulista - unesp, department of diagnosis and surgery, araraquara school of dentistry, araraquara, sp, brazil.

introduction: the aim of this study was to evaluate the influence of different levels of external irrigation during irradiation with an erbium, chromium: yttrium-scandium-gallium-garnet (er,cr:ysgg) laser on the roughness and wear of dental tissue during scaling procedures. methods: twenty-five uniradicular bovine teeth had the proximal surfaces planed and divided into 3 regions: upper, middle ...

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