Eficienta laserului in ortodontie.
- Scaderea durerii post activarea aparatelor ortodontice si a inflamatiei produsa de resorbtia osoasa
- Scurtarea duratei tratamentului ortodontic datorita accelerarii deplasarilor dentare
- Stimularea osteoblastilor si implicit a formarii de os
- Expunerea dintilor neerupti in vederea aplicarii sistemelor de ancorare ortodontice cu un minim de sangerare => un camp operator lipsit de sangerare favorabil adeziunii superioare a bracketilor la structurile dentare.
Lasers Surg Med. 2004;35(2):117-20.
Effects of low-intensity laser therapy on the orthodontic movement velocity of human teeth: a preliminary study.
Cruz DR1, Kohara EK, Ribeiro MS, Wetter NU.
1Centro de Lasers e Aplicações, Instituto de Pesquisas Energeticas e Nucleares--IPEN, São Paulo, Brazil.
Abstract
BACKGROUND AND OBJECTIVES:
Low-intensity laser therapy (LILT) has been studied in many fields of dentistry, but to our knowledge, this is the first time that its effects on orthodontic movement velocity in humans are investigated.
STUDY DESIGN/PATIENTS AND METHODS:
Eleven patients were recruited for this 2-month study. One half of the upper arcade was considered control group (CG) and received mechanical activation of the canine teeth every 30 days. The opposite half received the same mechanical activation and was also irradiated with a diode laser emitting light at 780 nm, during 10 seconds at 20 mW, 5 J/cm2, on 4 days of each month. Data of the biometrical progress of both groups were statistically compared.
RESULTS:
All patients showed significant higher acceleration of the retraction of canines on the side treated with LILT when compared to the control.
CONCLUSIONS:
Our findings suggest that LILT does accelerate human teeth movement and could therefore considerably shorten the whole treatment duration.
PMID:15334614[PubMed - indexed for MEDLINE]
2. Lasers Med Sci. 2013 Jan;28(1):49-55. doi: 10.1007/s10103-012-1061-z. Epub 2012 Feb 21.
Effects of light emitting diode (LED) therapy at 940 nm on inflammatory root resorption in rats.
Fonseca PD1, de Lima FM, Higashi DT, Koyama DF, Toginho Filho Dde O, Dias IF, Ramos Sde P.
Author information
Abstract
The effects of LED therapy at 940 nm on periodontal healing, inflammatory cell infiltration, and root resorption were analyzed in an experimental model of orthodontic tooth movement in rats. Twenty-five male Wistar rats were allocated into four experimental groups: Control animals (Co, n = 5), Controls + LED therapy (CoLED, n = 6), animals submitted to orthodontic force (RR, n = 7) and submitted to orthodontic force + LED therapy (RRLED, n = 7). All procedures were approved by the Committee for Ethics in Animal Experimentation of the Universidade Estadual de Londrina (protocol CEEA 5/2010 37359). A force of 50 g was applied to the right upper molars of RR and RRLED groups. On days 2, 3, and 4 after orthodontic treatment, the CoLED and RRLED groups received LED irradiation (940 nm, 4 J/cm(2)). The animals were killed on day 7 for histological analysis. An increased number of root resorption lacunae was found only in the RR group (p < 0.05). The RR group also presented more osteoclasts (p < 0.005) and inflammatory cell infiltration (p < 0.005) than the control group. The RRLED group presented fewer osteoclasts (p < 0.005) and inflammatory cells (p < 0.005) in the periodontal ligament than the RR group. The CoLED and RRLED groups presented more periodontal fibroblasts (p < 0.005) than non-irradiated groups. RRLED presented more blood vessels (p < 0.01) in the periodontal ligament than the RR group. In conclusion, the results suggest that LED therapy improved periodontal tissue repair and decreased inflammation and root resorption after the application of orthodontic force.
PMID:22350492[PubMed - indexed for MEDLINE]
J Biomed Opt. 2013 Dec;18(12):128001. doi: 10.1117/1.JBO.18.12.128001.
Effect of 940 nm low-level laser therapy on osteogenesis in vitro.
Jawad MM1, Husein A2, Azlina A3, Alam MK4, Hassan R4, Shaari R5.
Author information
Abstract
Bone regeneration is essential in medical treatment, such as in surgical bone healing and orthodontics. The aim of this study is to examine the effect of different powers of 940 nm diode low-level laser treatment (LLLT) on osteoblast cells during their proliferation and differentiation stages. A human fetal osteoblast cell line was cultured and treated with LLLT. The cells were divided into experimental groups according to the power delivered and periods of exposure per day for each laser power. The (3-(4,5-dimethylthiazol-2yl)-2,5 diphenyl tetrazolium bromide) (MTT) assay was used to determine cell proliferation. Both alkaline phosphatase and osteocalcin activity assays were assessed for cell differentiation. All treatment groups showed a significant increase in cell proliferation and differentiation compared to the control group. Regarding the exposure time, the subgroups treated with the LLLT for 6 min showed higher proliferation and differentiation rates for the powers delivered, the 300-mW LLLT group significantly increased the amount of cell proliferation. By contrast, the 100 and 200 mW groups showed significantly greater amounts of cell differentiation. These results suggest that the use of LLLT may play an important role in stimulating osteoblast cells for improved bone formation.
PMID:24337495[PubMed - indexed for MEDLINE]
Lasers Med Sci. 2008 Jan;23(1):27-33. Epub 2007 Mar 15.
The effect of low-level laser therapy during orthodontic movement: a preliminary study.
Youssef M1, Ashkar S, Hamade E, Gutknecht N, Lampert F, Mir M.
Author information
Abstract
It has been emphasized that one of the most valuable treatment objectives in dental practice is to afford the patient a pain-free treatment. By the evolution of the laser applications, the dental committee aimed to achieve this goal without analgesic drugs and painful methods. Orthodontic treatment is one of these concerns, that one of the major components of patient to reject this treatment is the pain accompanied during the different treatment phases. Another great concern of the patient is not to get through prolonged periods of treatment. The aim of this study is to evaluate the effect of the low-level (GaAlAs) diode laser (809 nm, 100 mW) on the canine retraction during an orthodontic movement and to assess pain level during this treatment. A group of 15 adult patients with age ranging from 14 to 23 years attended the orthodontic department at Dental School, Damascus University. The treatment plan for these patients included extraction of the upper and lower first premolars because there was not enough space for a complete alignment or presence of biprotrusion. For each patient, this diagnosis was based on a standard orthodontic documentation with photographs, model casts, cephalometric, panorama, and superior premolar periapical radiographies. The orthodontic treatment was initiated 14 days after the premolar extraction with a standard 18 slot edgewise brackets [Rocky Mountain Company (RMO)]. The canine retraction was accomplished by using prefabricated Ricketts springs (RMO), in both upper and lower jaws. The right side of the upper and lower jaw was chosen to be irradiated with the laser, whereas the left side was considered the control without laser irradiation. The laser was applied with 0-, 3-, 7-, and 14-day intervals. The retraction spring was reactivated on day 21 for all sides. The amount of canine retraction was measured at this stage with a digital electronic caliper (Myoto, Japan) and compared each side of the relative jaw (i.e., upper left canine with upper right canine and lower left canine with lower right canine). The pain level was prompted by a patient questionnaire. The velocity of canine movement was significantly greater in the lased group than in the control group. The pain intensity was also at lower level in the lased group than in the control group throughout the retraction period. Our findings suggest that low-level laser therapy can highly accelerate tooth movement during orthodontic treatment and can also effectively reduce pain level.
Efficacy of low-intensity laser therapy in reducing treatment time and orthodontic pain: a clinical investigation.
Doshi-Mehta G1, Bhad-Patil WA.
Abstract
INTRODUCTION:
The long duration of orthodontic treatment is a major concern for patients. A noninvasive method of accelerating tooth movement in a physiologic manner is needed. The aim of this study was to evaluate of the efficacy of low-intensity laser therapy in reducing orthodontic treatment duration and pain.
METHODS:
Twenty patients requiring extraction of first premolars were selected for this study. We used a randomly assigned incomplete block split-mouth design. Individual canine retraction by a nickel-titanium closed-coil spring was studied. The experimental side received infrared radiation from a semiconductor (aluminium gallium arsenide) diode laser with a wavelength of 810 nm. The laser regimen was applied on days 0, 3, 7, and 14 in the first month, and thereafter on every 15th day until complete canine retraction was achieved on the experimental side. Tooth movement was measured on progress models. Each patient's pain response was ranked according to a visual analog scale.
RESULTS:
An average increase of 30% in the rate of tooth movement was observed with the low-intensity laser therapy. Pain scores on the experimental sides were significantly lower compared with the control sides.
CONCLUSIONS:
Low-intensity laser therapy is a good option to reduce treatment duration and pain.
Copyright © 2012 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.
Comment in
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Questions regarding low-level laser therapy article. [Am J Orthod Dentofacial Orthop. 2012]
PMID:22381489[PubMed - indexed for MEDLINE]
Lasers Med Sci. 2013 Jan;28(1):41-7. doi: 10.1007/s10103-012-1059-6. Epub 2012 Feb 18.
Effect of low-level laser therapy (LLLT) on orthodontic tooth movement.
Genc G1, Kocadereli I, Tasar F, Kilinc K, El S, Sarkarati B.
Author information
Abstract
The aim of this study is to evaluate the effects of low-level laser therapy (LLLT) on (1) the velocity of orthodontic tooth movement and (2) the nitric oxide levels in gingival crevicular fluid (GCF) during orthodontic treatment. The sample consisted of 20 patients (14 girls, six boys) whose maxillary first premolars were extracted and canines distalized. A gallium-aluminum-arsenide (Ga-Al-As) diode laser was applied on the day 0, and the 3rd, 7th, 14th, 21st, and 28th days when the retraction of the maxillary lateral incisors was initiated. The right maxillary lateral incisors composed the study group (the laser group), whereas the left maxillary lateral incisors served as the control. The teeth in the laser group received a total of ten doses of laser application: five doses from the buccal and five doses from the palatal side (two cervical, one middle, two apical) with an output power of 20 mW and a dose of 0.71 J /cm(2). Gingival crevicular fluid samples were obtained on the above-mentioned days, and the nitric oxide levels were analyzed. Bonferroni and repeated measures variant analysis tests were used for statistical analysis with the significance level set at p ≤ 0.05. The application of low-level laser therapy accelerated orthodontic tooth movement significantly; there were no statistically significant changes in the nitric oxide levels of the gingival crevicular fluid during orthodontic treatment.
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