Abstract:
:Although orthodontic treatment is common, orthodontic force often induced pain. Low-level laser therapy (LLLT) has been investigated to improve therapeutic comfort. In dentistry, LLLT is mainly applied using two types of lasers, CO2 and diode lasers, whose biological actions are thought to be associated with wavelength (CO2: 10,600 nm; diode: 808 nm). The analgesic effect of LLLT on orthodontic treatment-related pain is widely reported but inconsistent. This study aimed to (1) determine whether irradiation with a CO2 or diode laser attenuates orthodontic treatment-related pain using the jaw-opening reflex model, (2) elucidate the optimal irradiation protocol for both lasers to obtain the maximal analgesic effect, (3) evaluate the effects of laser irradiation on other biological features [e.g., tooth movement, glial fibrillary acidic protein (GFAP) expression, and temperature alterations] and (4) investigate the mechanism underlying the analgesic effect of laser irradiation. In this animal model, orthodontic treatment-induced pain manifested as a significantly reduced the threshold for inducing the jaw-opening reflex on the orthodontically treated side compared with the contralateral side. GFAP expression in the bilateral trigeminal ganglia (TGs) was significantly increased by the application of orthodontic force. CO2 laser irradiation of the orthodontically treated region significantly increased the threshold for inducing the jaw-opening reflex and the peripheral temperature. Similar reductions in jaw-opening reflex excitability were induced by surface anesthesia and thermal stimulation but not, the diode laser. Neither CO2 nor diode laser irradiation altered GFAP expression in the TGs. Infiltration anesthesia also significantly increased the threshold for inducing the jaw-opening reflex on each anesthetized side. Irradiation (30 s) by either laser immediately after orthodontic force application (preirradiation) significantly decreased jaw-opening reflex excitability and GFAP expression in the bilateral TGs the next day. However, thermal stimulation immediately after orthodontic force application failed to alter jaw-opening reflex excitability the next day. Laser irradiation did not alter tooth movement; however, an optimized irradiation protocol for aiding tooth movement is suggested. In conclusion, both CO2 and diode lasers are able to prevent orthodontic treatment-related pain. Furthermore, the involvement of temperature alterations and surface anesthesia in the analgesic effect induced by CO2 laser irradiation is suggested.
journal_name
Front Neuroljournal_title
Frontiers in neurologyauthors
Tsuchiya T,Hasegawa N,Yugawa M,Sasaki A,Suda N,Adachi Kdoi
10.3389/fneur.2020.00481subject
Has Abstractpub_date
2020-06-05 00:00:00pages
481issn
1664-2295journal_volume
11pub_type
杂志文章abstract::Background: Tuberculous meningitis (TBM) is an extremely devastating inflammation of the central nervous system; however, no available optimum treatment can effectively control the disease so far. Method: The medical records of TBM patients from May 2011 to August 2016 in West China hospital were retrospectively analy...
journal_title:Frontiers in neurology
pub_type: 杂志文章
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pub_type: 杂志文章,评审
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journal_title:Frontiers in neurology
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abstract::[This corrects the article DOI: 10.3389/fneur.2019.00129.]. ...
journal_title:Frontiers in neurology
pub_type: 杂志文章,已发布勘误
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pub_type: 杂志文章,评审
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pub_type: 杂志文章,评审
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pub_type: 杂志文章
doi:10.3389/fneur.2016.00025
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abstract:BACKGROUND:Accurate recognition of stroke symptoms by Emergency Medical Services (EMS) is necessary for timely care of acute stroke patients. We assessed the accuracy of stroke diagnosis by EMS in clinical practice in a major US city. METHODS AND RESULTS:Philadelphia Fire Department data were merged with data from a s...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2017.00466
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pub_type: 杂志文章
doi:10.3389/fneur.2019.00252
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journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2015.00244
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abstract::Background and Purpose: The effect of uric acid (UA) levels on severity and prognosis of spontaneous intracerebral hemorrhage (ICH) remains controversial. We aimed to explore the association of admission UA levels with stroke severity and outcomes in ICH patients. Materials and Methods: The patients enrolled in this s...
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pub_type: 杂志文章
doi:10.3389/fneur.2020.609938
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abstract::The cingulate island sign (CIS) on fludeoxyglucose (FDG)-positron emission tomography (PET) is a supporting biomarker of dementia with Lewy bodies (DLB). Its diagnostic accuracy has only been investigated in FDG-PET, however. The present prospective study compared the CIS on I-iodoamphetamine-single photon emission co...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.568438
更新日期:2020-11-19 00:00:00
abstract::Objective: Hybrid recanalization for vertebral artery (VA) long-segmental occlusion using a combination of ostial vertebral endarterectomy and distal endovascular stenting has achieved technical success. The safety and efficacy of the hybrid technique should be further evaluated. Methods: We examined a cohort of refra...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.00387
更新日期:2020-05-12 00:00:00
abstract::Traumatic brain injury (TBI) can cause seizures and the development of epilepsy. The incidence of seizures varies from 21% in patients with severe brain injuries to 50% in patients with war-related penetrating TBI. In the acute and sub-acute periods following injury, seizures can lead to increased intracranial pressur...
journal_title:Frontiers in neurology
pub_type: 杂志文章,评审
doi:10.3389/fneur.2013.00170
更新日期:2013-11-01 00:00:00
abstract::The evidence demonstrating the benefits of exercise is indisputable for healthy subjects, and more recently, it is growing for Parkinson's disease (PD) patients. Due to its easy access, low cost, social facilitation and, above all, the symptomatic effect, clinical exercise may have a profound impact on PD management. ...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.00228
更新日期:2020-04-02 00:00:00
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journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.600917
更新日期:2020-12-04 00:00:00
abstract::This review begins with the history of the events starting with the death of Libby Zion that lead to the Bell Commission, that the studied her death and made recommendations for improvement that were codified into law in New York state as the 405 law that the ACGME essentially adopted in putting a cap on work hours an...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2010.00128
更新日期:2010-10-20 00:00:00
abstract::While the spread of some neurodegenerative disease-associated proteinopathies, such as tau and α-synuclein, is well studied and clearly implicates transsynaptic pathology transmission, research into the progressive spread of amyloid-β pathology has been less clear. In fact, prior analyses of transregional amyloid-β pa...
journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2017.00653
更新日期:2017-12-18 00:00:00
abstract::The dopamine (DA) precursor l-DOPA has been the most effective treatment for Parkinson's disease (PD) for over 40 years. However, the response to this treatment changes with disease progression, and most patients develop dyskinesias (abnormal involuntary movements) and motor fluctuations within a few years of l-DOPA t...
journal_title:Frontiers in neurology
pub_type: 杂志文章,评审
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doi:10.3389/fneur.2019.00650
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pub_type: 杂志文章
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journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2020.538257
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pub_type: 杂志文章,评审
doi:10.3389/fneur.2020.00703
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journal_title:Frontiers in neurology
pub_type: 杂志文章
doi:10.3389/fneur.2012.00025
更新日期:2012-02-28 00:00:00
abstract::Background: Tract-based spatial statistics (TBSS) is suitable for the assessment of voxel-wise changes in fiber integrity in WM tracts in the entire brain. Longitudinal TBSS analyses of early multiple sclerosis (MS) using 3 Tesla magnetic resonance imaging (MRI) are not common. Objective: To characterize microstructur...
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pub_type: 杂志文章
doi:10.3389/fneur.2019.01165
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journal_title:Frontiers in neurology
pub_type:
doi:10.3389/fneur.2017.00072
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pub_type: 杂志文章
doi:10.3389/fneur.2018.00124
更新日期:2018-03-06 00:00:00