2,293 results match your criteria lasers randomly


595-nm pulsed dye laser combined with fractional CO laser reduces hypertrophic scar through down-regulating TGFβ1 and PCNA.

Lasers Med Sci 2021 Jun 12. Epub 2021 Jun 12.

Department of Dermatology, Seventh Medical Center of PLA General Hospital, Beijing, 100700, China.

595-nm pulsed dye laser and fractional CO laser have been demonstrated effective to treat hypertrophic scar. The underlying mechanism may involve transforming growth factor-beta1 (TGFβ1) and proliferating cell nuclear antigen (PCNA), but remains to be clarified. Our study was performed to investigate how 595-nm pulsed dye laser combined with fractional CO laser treats hypertrophic scars in a rabbit model through regulating the expression of TGFβ1 and PCNA. Read More

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The results of the diode laser hair reduction treatments after the IPL hair reduction treatments.

J Cosmet Laser Ther 2021 Jun 9:1-6. Epub 2021 Jun 9.

The Section of Professional Cosmetology, the Faculty of Motor Rehabilitation, The University of Physical Education in Krakow, Krakow, Poland.

: Lasers and IPL action are similarly based on the selective photo thermolysis principle, where melanin acts as chromatophore. There are, however, fundamental differences in the way they are built and in the light they emit.The goal of this paper is to compare the results of epilation treatments by laser and by IPL and to rate the effectiveness of diode laser epilation following non-coherent light therapy. Read More

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Effect of casein-phosphopeptide amorphous calcium phosphate and fluoride with/without erbium, chromium-doped yttrium, scandium, gallium, and garnet laser irradiation on enamel microhardness of permanent teeth.

Dent Res J (Isfahan) 2021 17;18:20. Epub 2021 Mar 17.

Private Office, Tehran, Iran.

Background: Laser therapy, along with the use of fluoridated compounds is a novel technique suggested for caries prevention. Casein phosphopeptide amorphous calcium phosphate (CPP-ACP) is another product suggested for this purpose. This study compared the effect of CPP-ACP and fluoride with/without Erbium, chromium-doped yttrium, scandium, gallium, and garnet laser irradiation on enamel microhardness of permanent teeth. Read More

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Efficacy and Safety of Topical Silymarin Versus Low Fluence 1064-nm Q Switched Nd:YAG Laser in the Treatment of Melasma: A Comparative Randomized Trial.

Lasers Surg Med 2021 Jun 8. Epub 2021 Jun 8.

Department of Dermatology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, 11651, Egypt.

Background And Objectives: The management of melasma is challenging and requires multiple uses of available therapeutic options. To compare the short-term efficacy and safety of topical silymarin and low fluence 1064-nm Q-switched ND:YAG laser for treatment of melasma with dermoscopic follow-up.

Study Design/materials And Methods: Fifty female patients with melasma were included in this study. Read More

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Effect of bioactive glasses and neodymium:yttrium-aluminum-garnet laser on dentin permeability.

J Conserv Dent 2020 Nov-Dec;23(6):583-588. Epub 2021 Feb 11.

Department of Dentistry I, Federal University of Maranhão, São Luis, Maranhão, Brazil.

Context: Dental hypersensitivity and loss of dental tissues are commonly observed in patients, and most of the problems are caused due to total or partial exposure of dentinal tubules.

Aims: The purpose of this study is to evaluate the performance of 45S5 bioactive glass and niobophosphate (NbG) associated with neodymium: yttrium-aluminum-garnet (Nd:YAG) laser for the reduction of dentin permeability.

Materials And Methods: Fifty bovine dentin discs were made and distributed randomly into five groups ( = 10). Read More

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February 2021

The Efficacy and Safety of Fractional 1064 nm Nd:YAG Picosecond Laser Combined With Intense Pulsed Light in the Treatment of Atrophic Acne Scar: A Split-Face Study.

Lasers Surg Med 2021 Jun 3. Epub 2021 Jun 3.

Department of Dermatology, Huashan Hospital, Shanghai Medical College, Fudan University, 12 Wulumuqi Road, Shanghai, 200040, China.

Background And Objectives: To evaluate the efficacy and safety of fractional 1064 nm Nd:YAG picosecond laser combined with intense pulsed light (IPL) in the treatment of atrophic acne scar with post-inflammatory erythema (PIE). © 2021 Wiley Periodicals LLC.

Study Design/materials And Methods: Seventeen patients received five sessions of treatment at weeks 0, 4, 8, 12, 16 and were followed up at week 28. Read More

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Influence of low-level laser therapy on implant stability in implants placed in healed sites: a randomized controlled trial.

Int J Implant Dent 2021 Jun 1;7(1):49. Epub 2021 Jun 1.

Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Rio Grande, Brazil.

Background: The present study aims to assess the influence of low-level laser therapy (LLLT) on stability in implants placed in healed sites.

Material And Methods: The present study followed the SPIRIT statement and is reported according to CONSORT. Patients were randomly allocated to LLLT or control groups. Read More

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Effect of photobiomodulation therapy on trunk flexor performance after incisional hernia repair: a randomized controlled trial.

Lasers Med Sci 2021 May 29. Epub 2021 May 29.

Department of Physical Therapy for Surgery, Faculty of Physical Therapy, Cairo University, 7Ahmed El-Zayat St. Bien El-Sarayat, Dokki, Giza, 11432, Egypt.

To investigate the effect of two photobiomodulation approaches on trunk flexor performance after incisional hernia repair and to compare the effects of both wavelengths. Forty-five patients were randomly distributed after isokinetic trunk flexor assessments into infrared laser, red laser, and placebo groups. Each patient received laser treatment followed by a traditional physical therapy program. Read More

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Effects of Diode Low-Level Laser Therapy of 810 Nm on Pulpal Anesthesia of Maxillary Premolars: A Double-Blind Randomized Clinical Trial.

Eur Endod J 2021 May 25. Epub 2021 May 25.

Department of Endodontics, Faculty of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.

Objective: The purpose of this study was to investigate the pulpal effect of diode low-level laser therapy (LLLT) of 810 nm on the alleviation of pain in patients requiring dental procedures.

Methods: The current study was a double-blind randomized clinical trial carried out on twenty participants. The electric pulp testing (EPT) was recorded at baseline. Read More

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Protective effect of low-level laser irradiation on lipopolysaccharide-mediated inflammatory injury of human periodontal ligament fibroblasts.

Hua Xi Kou Qiang Yi Xue Za Zhi 2021 Jun;39(3):260-266

Dept. of Endodontics Third Room, School of Stomatology, Tianjin Medical University, Tianjin 300070, China.

Objectives: To study the effect and mechanism of low-level laser irradiation (LLLI) on lipopolysaccharide (LPS)-induced inflammatory injury of human periodontal ligament fibroblasts (hPDLFs).

Methods: hPDLFs were inoculated into well plates and randomly divided into the normal group, LPS group, and LPS+LLLI group. The cells in the normal group were cultured in conventional medium. Read More

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Treatment of partial injury of the calcaneus tendon with heterologous fibrin biopolymer and/or photobiomodulation in rats.

Lasers Med Sci 2021 May 26. Epub 2021 May 26.

Department of Biomedical Engineering, Instituto Científico E Tecnológico, University Brazil, Carolina FonsecaSão Paulo, 235, Brazil.

The present study aimed to evaluate the new heterologous fibrin biopolymer associated, or not, with photobiomodulation therapy for application in tendon injuries, considered a serious and common orthopedic problem. Thus, 84 Rattus norvegicus had partial transection of the calcaneus tendon (PTCT) and were randomly divided into: control (CG); heterologous fibrin biopolymer (HFB); photobiomodulation (PBM); heterologous fibrin biopolymer + photobiomodulation (HFB + PBM). The animals received HFB immediately after PTCT, while PBM (660 nm, 40 mW, 0. Read More

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The efficiency of laser application for debonding laminate restorations manufactured of current CAD-CAM materials with different thicknesses.

Niger J Clin Pract 2021 May;24(5):705-711

Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, Ankara, Turkey.

Background: Using lasers for adhesive restoration removal can be practical and atraumatic.

Aims: The purpose of this study was to investigate Er: YAG laser exposure on debonding the adhesive cementation between enamel and feldspar ceramic, lithium disilicate-reinforced and resin nano ceramic composite laminate restorations.

Materials And Methods: Vita Cerec Blocs, IPS e. Read More

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Low-fluence and low-density CO2 laser: histological analysis of collagen fiber changes in skin and its clinical repercussions in photorejuvenation.

Lasers Med Sci 2021 May 19. Epub 2021 May 19.

Rheumatology Department, Hospital Universitário Evangélico Mackenzie, Curitiba, PR, Brazil.

This study refers to clinical and histologic analysis of effects on photorejuvenation after one single treatment of fractional CO2 laser with low fluence and low density. To analyze histologically the quantitative variation of collagen fibers type I and III, elastic fibers, and epidermal thickness on D84, besides clinical evaluation of amount, length, thickness, and depth of periocular wrinkles during the same period. This is an open, prospective, interventional study. Read More

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Low-level laser therapy (LLLT) improves alveolar bone healing in rats.

Lasers Med Sci 2021 May 17. Epub 2021 May 17.

Department of Pediatric Dentistry, School of Dentistry of Ribeirao Preto, University of Sao Paulo (USP), Av. Do Café S/N, Ribeirao Preto, SP, CEP: 14040-904, Brazil.

The main objective of the present study was to evaluate the effect of low-level laser therapy (LLLT) in enhancing bone healing in irradiated alveolus post-tooth extraction. Sixty male Wistar rats (180 ± 10 g) were used in the present study. The left maxillary first molars were extracted, and the alveolar region was irradiated by diode laser device (GaAlAs) immediately after extraction and for more 3-day daily applications. Read More

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Intravitreal conbercept for diabetic macular oedema: 2-year results from a randomised controlled trial and open-label extension study.

Br J Ophthalmol 2021 May 17. Epub 2021 May 17.

Department of Ophthalmology (aka National Clinical Research Center for Eye Diseases), Shanghai General Hospital, Shanghai, China

Background: To demonstrate the efficacy and safety of intravitreal injections of conbercept versus laser photocoagulation in the treatment of diabetic macular oedema (DME).

Methods: A 12-month multicentre, randomised, double-masked, double-sham, parallel controlled, phase III trial (Sailing Study), followed by a 12-month open-label extension study. Patients with centre-involved DME were randomly assigned to receive either laser photocoagulation followed by pro re nata (PRN) sham intravitreal injections (laser/sham) or sham laser photocoagulation followed by PRN 0. Read More

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Fractional Carbon Dioxide Laser Versus Carboxytherapy in Treatment of Striae Distensae.

Lasers Surg Med 2021 May 16. Epub 2021 May 16.

Dermatology, Venereology and Andrology, Faculty of Medicine, University of Alexandria, Alexandria, 21131, Egypt.

Background And Objectives: The aim of this study was to compare the efficacy and safety of fractional carbon dioxide (CO ) laser versus carboxytherapy in treatment of striae distensae.

Study Design/materials And Methods: This study was conducted on forty female patients with striae distensae on the abdomen. Patients were selected and divided randomly into two matched groups; group I was treated with fractional CO laser resurfacing and group II with carboxytherapy. Read More

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Influence of Diode Laser for the Treatment of Dentin Hypersensitivity on Microleakage of Cervical Restorations.

Biomed Res Int 2021 30;2021:9984499. Epub 2021 Apr 30.

Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia.

Noncarious cervical lesions (NCCLs) are a common clinical finding often linked with dentin hypersensitivity (DH). . The aim of the study was to evaluate the influence of diode laser for the treatment of DH on microleakage of subsequent NCCL restorations. Read More

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The Effect of High-Power and Low-Power Lasers on Symptoms and the Nerve Conduction Study in Patients With Carpal Tunnel Syndrome. A Prospective Randomized Single-Blind Clinical Trial.

J Lasers Med Sci 2020 30;11(Suppl 1):S73-S79. Epub 2020 Dec 30.

Department of Emergency Medicine, Amir al momenin Hospital, Tehran Azad University of Medical Sciences, Tehran, Iran.

Carpal tunnel syndrome (CTS) is the most common peripheral nerve entrapment. Various treatments have been suggested for CTS and there is no consensus on their superiority and the order of their use. Laser therapy is a non-invasive treatment method for many musculoskeletal diseases, including CTS. Read More

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December 2020

Comparing the Efficacy of Toluidine Blue, Methylene Blue and Curcumin in Photodynamic Therapy Against Enterococcus faecalis.

J Lasers Med Sci 2020 30;11(Suppl 1):S49-S54. Epub 2020 Dec 30.

Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Antimicrobial photodynamic therapy (aPDT) as a supplement to the conventional root canal preparation has shown promising results. Previous studies have adopted various combinations of light sources and photosensitizers, which makes it difficult to compare the disinfection efficacy of different PDT protocols. The aim of the present study was to compare the efficacy of three photosensitizers (toluidine blue, methylene blue, and curcumin) in PDT using LED against in root canal disinfection. Read More

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December 2020

Comparing the Success Rate and Side Effects of Endovenous Laser Ablation and Radiofrequency Ablation to Treat Varicose Veins in the Lower Limbs: A Randomized Clinical Trial.

J Lasers Med Sci 2020 30;11(Suppl 1):S43-S48. Epub 2020 Dec 30.

Department of General Surgery, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Varicosis is a condition affecting the superficial venous system of the lower limbs. Endovenous laser ablation (EVLA) is a minimally invasive method that uses different frequencies of laser for treatment. Radiofrequency (RF) has also been effectively used for vein ablation through thermal mechanisms. Read More

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December 2020

Low-coherence dye laser with an intracavity radiation diffuser.

Opt Express 2021 Apr;29(8):11453-11467

Study of a low-coherence dye laser is reported. A cuvette with a 2 mm gap containing a dense mixture (slurry) of LiF crystal granules (70-140 μm) and an immersion liquid with a dye dissolved in it was installed in a double flat mirror cavity as an active element and simultaneously as a diffuser of radiation. The parallel light beam experiences losses in such a cuvette due to refraction at a set of interfaces between solid particles and a liquid in which different parts of the beam are randomly deflected at small angles. Read More

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Efficacy of Laser Photoacoustic Streaming in Paediatric Root Canal Disinfection - An Study.

Contemp Clin Dent 2021 Jan-Mar;12(1):44-48. Epub 2021 Mar 20.

Department of Periodontology, Bharati Vidyapeeth Dental College, Wanlesswadi, Sangli, Maharashtra, India.

Background: Various techniques have been employed to enhance the root canal disinfection rate using sodium hypochlorite (NaOCl) as an irrigant. Photon initiated photo-acoustic streaming using lasers is a newer method of endodontic disinfection.

Aim: The aim of this study is to evaluate and compare the efficacy of photo-initiated photoacoustic streaming and conventional irrigation technique using 2. Read More

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Effects of laser modalities on shear bond strengths of composite superstructure to zirconia and PEEK infrastructures: an in vitro study.

Odontology 2021 May 1. Epub 2021 May 1.

Departments of Prosthodontics, Sivas Cumhuriyet University, Sivas, Turkey.

In the last decade, demand for metal-free esthetic restorations has grown considerably due to the development of materials to fulfill the need for an esthetic prosthesis. We examined the effects of erbium-doped yttrium aluminum garnet (Er:YAG), neodymium-doped yttrium aluminum garnet (Nd:YAG), and potassium titanyl phosphate (KTP) laser applications on the shear bond strength (SBS) of nanohybrid composite superstructures to zirconia and PEEK infrastructures. Zirconia and PEEK specimens were prepared with CAD/CAM technology in accordance with ISO 11405 standards. Read More

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Managing Resonant and Nonresonant Lasing Modes in GaAs Nanowire Random Lasers.

Nano Lett 2021 May 26;21(9):3901-3907. Epub 2021 Apr 26.

Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.

Random lasers are promising, easy-to-fabricate light sources that rely on scattering instead of well-defined optical cavities. We demonstrate random lasing in GaAs nanowires using both randomly oriented and vertically aligned arrays. These configurations are shown to lase in both resonant and nonresonant modes, where aligned nanowires support predominantly resonant lasing and randomly oriented favors nonresonant lasing. Read More

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Personalized video consent in Blepharoplasty: A new paradigm in the preoperative consent giving process.

J Cosmet Dermatol 2021 Apr 24. Epub 2021 Apr 24.

Department of Dermatology, Cosmetic Dermatology & Dermato-Surgery, The Esthetic Clinics, Mumbai, India.

Background: Informed consent is not simply the signing of a form by the patient but more significantly, a process of an in-depth communication between the doctor and the patient.

Aim: The written informed consent process typically involves reading a lengthy document involving the medical terms which at times lead to misinterpretation. Therefore, the current research envisages assessing the effectiveness and acceptability of the video consent tool athwart the traditional written consent procedure. Read More

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Low level laser therapy, Er,Cr:YSGG laser and fluoride varnish for treatment of dentin hypersensitivity after periodontal surgery: A randomized clinical trial.

Lasers Med Sci 2021 Apr 21. Epub 2021 Apr 21.

Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran.

This clinical trial aimed to compare the effects of low-level laser therapy (LLLT), Er,Cr;YSGG laser, and fluoride varnish, as compared to the placebo laser on decreasing dentin hypersensitivity (DH). This randomized, double-blinded clinical trial included 60 jaw quadrants in 24 patients who underwent periodontal surgery. The quadrants were randomly assigned to 4 groups and received treatments as follows. Read More

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Assessment of Effectiveness of Erbium:Yttrium-Aluminum-Garnet Laser, GentleWave Irradiation, Photodynamic Therapy, and Sodium Hypochlorite in Smear Layer Removal.

J Contemp Dent Pract 2020 Nov 1;21(11):1266-1269. Epub 2020 Nov 1.

Private Practitioner, Endodontist and Faculty of Conservative Dentistry, Tamil Nadu, India.

Aim And Objective: To compare the effectiveness of erbium:yttrium-aluminum-garnet laser, GentleWave irradiation, photodynamic therapy (PDT), and sodium hypochlorite in smear layer removal and dentin permeability with a scanning electron microscope (SEM).

Materials And Methods: Seventy-five recently extracted single-rooted teeth (maxillary second premolars) were randomly divided into 5 groups of 15 each. Group I teeth was the control group in which conventional root canal preparation (RCP) [17% ethylenediaminetetraacetic acid (EDTA)] was done without laser irradiation, group II teeth underwent RCP and GentleWave™ treatment, group III teeth were subjected to Er:YAG laser irradiation, group IV uses low-level 660 nm (PDT), and group V samples were irrigated with 5. Read More

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November 2020

Photobiomodulation combined with adipose-derived stem cells encapsulated in methacrylated gelatin hydrogels enhances in vivo bone regeneration.

Lasers Med Sci 2021 Apr 11. Epub 2021 Apr 11.

Department of Plastic Reconstructive and Aesthetic Surgery, Faculty of Medicine, Hacettepe University, Ankara, Turkey.

Reconstruction of bone defects is still a significant challenge. The aim of this study was to evaluate the effect of application of photobiomodulation (PBM) to enhance in vivo bone regeneration and osteogenic differentiation potential of adipose-derived stem cells (ADSCs) encapsulated in methacrylated gelatin (GEL-MA) hydrogels. Thirty-six Sprague-Dawley rats were randomly separated into 3 experimental groups (n = 12 each). Read More

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The effectiveness of high-intensity laser therapy in the treatment of post-stroke patients with hemiplegic shoulder pain: a prospective randomized controlled study.

Lasers Med Sci 2021 Apr 8. Epub 2021 Apr 8.

Department of Physical Medicine and Rehabilitation, Health Sciences University, Gaziler Physical Medicine and Rehabilitation Education and Research Hospital, Ankara, Turkey.

To evaluate clinical and ultrasonographic efficacy of high-intensity laser therapy (HILT) in patients with hemiplegic shoulder pain (HSP) accompanied by partial thickness rotator cuff tear (PTRCT). The study was designed as a prospective, randomized, controlled trial. Patients with HSP accompanied by PTRCT (n = 44) were randomly assigned to HILT and control groups. Read More

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Effect of Low-Level Laser Therapy on Peri-Miniscrew Fluid Prostaglandin E2 and Substance P Levels: A Controlled Clinical Trial.

Turk J Orthod 2021 1;34(1):26-30. Epub 2021 Mar 1.

Health Service Vocational School of Higher Education, Van, Turkey.

Objective: This study aims to evaluate the effect of low-level laser therapy on peri-miniscrew fluid prostaglandin E2 (PGE2) and substance P (SP) levels during orthodontic treatment.

Methods: A total of 15 individuals were included in this study. Miniscrews were inserted to the inter-radicular region of the maxillary right and left second premolar and the first molar teeth, and diode lasers were randomly applied to the right or left side. Read More

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