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Low Intensity Laser Influence on Orthodontic Movement: A Randomized Clinical and Radiographic Trial
摘要： Introduction: Finding a method to decrease orthodontic treatment time has been a concern for several authors. This study evaluated, clinically and radiographically, the influence of low-level laser therapy on the rate of orthodontic movement and dental tissue integrity. Methods: The sample included 11 individuals with class I malocclusion, requiring extraction of 4 first premolars. Gallium aluminum arsenide diode laser with a wavelength of 780 nm was used once a month during retraction mechanics, to irradiate the maxillary and mandibular canines on one side and compare them with the nonirradiated contralateral side, after spring activation, until canine retraction was completed. This was followed by movement measurement. Periapical radiographs were used to check for possible modifications in the supporting tissues and root surface of the displaced canines. Results: No differences in the rate of tooth movement were found between the irradiated and nonirradiated side on both dental arches. There was no resorption of the root and/or alveolar bone crest, maintaining the integrity of these tissues. Conclusions: Low-level laser therapy did not promote an increment on the rate of tooth movement and did not cause greater root and alveolar bone crest resorption than on the nonirradiated side with the used protocol.
关键词： diode laser,orthodontic tooth movement,Low-level laser therapy
更新于2025-09-23 15:21:01
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The effects of a clinically feasible application of low-level laser therapy on the rate of orthodontic tooth movement: A triple-blind, split-mouth, randomized controlled trial
摘要： This split-mouth trial aimed to investigate the effect of low-level laser therapy (LLLT) on the amount of maxillary canine distalization when applied every 4 weeks over 12 weeks. Methods: Twenty-two adolescents and young adults (15 female, 7 male; aged 13-25 years; n 5 22) requiring bilateral maxillary first premolar extractions were recruited. After extractions and leveling-alignment, canines were retracted using closed-coil nickel-titanium springs delivering 150 g of force. LLLT was applied to 8 intraoral points on the buccal and palatal sides around the canine root for 10 seconds per point, on day 0, 28, and 56 with the control side receiving sham application. Alginate impressions were taken every 4 weeks on day 0, 28, 56, and 84. The amount of tooth movement, anchorage loss, and canine rotation were measured digitally. Randomization was through sequentially numbered, generated using www.randomisation.com and allocation concealment opaque, sealed envelopes. Participants, operator, and statistic assessor were blinded. Linear regression modeling accounting for clustering within each patient was used to identify differences between LLLT and control sides. Results: Twenty-one patients completed the study. The total amount of tooth movement was similar in the LLLT (2.55 6 0.73 mm) and control group (2.30 6 0.86 mm), whereas 0.25 mm (95% confidence interval, –0.21, 0.71 mm) of difference was insignificant (P 5 0.27). No significant differences were found for anchorage loss (P 5 0.22) or canine rotation (P 5 0.25). No harms were reported. Conclusions: Application of LLLT every 4 weeks did not result in differences in the amount of tooth movement, anchorage loss, and canine rotation during extraction space closure.
关键词： split-mouth trial,low-level laser therapy,maxillary canine distalization,orthodontic tooth movement
更新于2025-09-23 15:21:01
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A Comparative Assessment of Pain Caused by the Placement of Banded Orthodontic Appliances with and without Low-Level Laser Therapy: A Randomized Controlled Prospective Study
摘要： Patients still refuse or discontinue orthodontic treatment due to related pain and discomfort. In this study, we investigate if low-level laser therapy (LLLT) can reduce pain caused by orthodontic bands. Sixty subjects who needed bands placed on the upper permanent first molars were assigned randomly to the LLLT group, placebo, and control groups. Inclusion criteria were: age range 10–14 years, fully erupted upper first molars in healthy condition, presence of tight mesial proximal contact. Exclusion criteria were: systemic or metabolic diseases, chronic pain or neurological or psychiatric disorders, use of pharmacological agents interfering with pain perception, previous orthodontic treatment or the simultaneous presence of other devices in the patient’s mouth. The assessment of pain was performed by using a numeric rating scale (NRS) considering different time intervals, i.e., immediately after bands placement, 6 h, 24 h, and from day 2 to day 5. Differences in the maximum pain and in pain experienced at each time-point, among the three groups, was assessed by using the Kruskal–Wallis H. The final sample included 56 patients, 29 males, and 27 females, with a mean age of 12.03 ± 1.3 years. Patients were randomly allocated into three groups (tested, control, and placebo group) with each group consisting respectively of 19, 20, and 17 individuals. Subjects in the LLLT experienced less pain at each time interval as well as the maximum pain score being lower in the LLLT compared to control and placebo groups. These findings were all statistically significant (p < 0.05). LLLT can alleviate the intensity of pain after the placement of orthodontic bands.
关键词： laser,orthodontic tooth movement,low-level laser therapy,dental pain,orthodontics,dental materials
更新于2025-09-19 17:13:59
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Laser-Assisted Orthodontic Tooth Movement in Saudi Population: A Prospective Clinical Intervention of Low-Level Laser Therapy in the 1st Week of Pain Perception in Four Treatment Modalities
摘要： Background. This ?rst-in-human study in Saudi orthodontic patients has evaluated the role of low-level laser therapy (LLLT) in pain perception (PP). The outcome of single application of LLLT with 4 di?erent treatment modalities (TM) on PP are evaluated following orthodontic bracket bonding on maxilla. Materials and Methods. A prospective clinical intervention with imple- mentation of parallel technique in each group, 32 orthodontic patients with ectopic canine requiring ?xed orthodontic appliance were enrolled and randomly allocated to the 4 groups: LLLT + self-ligating (SL) bracket, LLLT + conventional (Conv.) bracket, non-LLLT + SL bracket, and non-LLLT + Conv. bracket. Orthodontic bracket bonding from 1st molar to 1st molar and superelastic 0.012 inch NiTi were applied for the maxilla. For each patient, maxillary 1st molar to molar received a single application of LLLT using a 940 nm Ga-Al-As laser device on 5 di?erent points labially/buccally and palatally. Main outcome measure was the degree of PP score during the 1st week of orthodontic tooth movement (OTM) after 4 hours, 24 hours, 3 days, and 7 days of both LLLT and non-LLLT treatment applications. A questionnaire with an 11-point numeric rating scale (NRS) was used for PP. Results. Mean ± SD of PP in the LLLT + SL group was 3.33 ± 1.4, 3.58 ± 1.06, 2.31 ± 0.67, and 1.89 ± 0.54 in 4 hours, 24 hours, 3 days, and 7 days, respectively. Compared to all 4 TM groups, LLLT groups showed better PP. More statistically signi?cant di?erences were found in LLLT groups. No harms were encountered. Limitations. The intervention provider and the patient were not blinded to the intervention. Conclusion. The LLLT + SL group revealed signi?cantly promising bene?ts on PP during OTM.
关键词： low-level laser therapy,self-ligating brackets,pain perception,conventional brackets,orthodontic tooth movement
更新于2025-09-19 17:13:59
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Effect of Low-level Laser Therapy on Orthodontic Tooth Movement
摘要： Prolonged orthodontic treatment duration is detrimental in terms of increased incidence of caries, root resorption, and reduced patient compliance. The aim of this randomized, clinical trial was to evaluate the effect of low-level laser therapy (LLLT) on the rate of orthodontic tooth movement (OTM) and pain control. Materials and Methods: This single-blind study included twenty participants requiring extraction of all first premolars. Randomly selected split-mouth design was used. One side was irradiated with 810 nm diode laser (dose of 5.0 J/cm2) at 10 points for 10 s. Irradiation was performed just after loading canine retraction forces and on days 3rd and 7th. Every 21st day, the force level of coil spring was adjusted, and LLLT protocol was repeated till retraction was complete. Measurements were recorded on study models to evaluate the rate of retraction. Results: Significant increase in OTM was observed on the side exposed to LLLT when compared to control side (P < 0.05). Statistically significant difference in pain perception was observed during first 2 days only between lased site and control site (P < 0.05). Conclusion: LLLT is a reliable tool for enhancing OTM and is effective in relieving pain at parameter settings and protocol used in this study.
关键词： Low?level laser therapy,orthodontic tooth movement,pain perception
更新于2025-09-12 10:27:22