Effects of Neodymium-Doped Yttrium Aluminium Garnet (Nd:YAG) Laser Irradiation on Bone Metabolism During Tooth Movement

Introduction. Primary acquired iris stromal cyst is rare in adults. In this group, they are generally stable lesions which require no treatment. Case outline. We describe a rare case of a small primary iris cyst in a 39-year-old patient, associated with unusual signs of irritation. Ultrasound biomicroscopy demonstrated iris stromal cyst measuring 3 ? 2 mm. A neodymium-doped yttrium aluminium garnet (Nd:YAG) laser cystotomy was engaged as the least invasive treatment approach. However, the cyst recurred soon after repeated laser treatment and sector iridectomy with excision of the cyst was performed. Five years after surgery there was no evidence of recurrence. Conclusion. Although more benign clinical course of primary stromal iris cyst is generally assumed in adults as compared to children, complete cyst removal seems to be mandatory for preventing cyst recurrence regardless of the cyst size or patient age. To the authors? knowledge this is the first documented report of Nd:YAG laser photodisruption of acquired primary iris stromal cyst in an adult.

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A case of large bladder hemangioma successfully treated with endoscopic yttrium aluminium garnet laser irradiation

International Journal of Urology ◽

10.1111/j.1442-2042.2011.02879.x ◽

2011 ◽

Vol 18 (12) ◽

pp. 854-856 ◽

Cited By ~ 5

Author(s):

Jun Takemoto ◽

Yuichiro Yamazaki ◽

Kiyohide Sakai

Keyword(s):

Laser Irradiation ◽

Yttrium Aluminium Garnet ◽

Yttrium Aluminium ◽

Bladder Hemangioma ◽

Yttrium Aluminium Garnet Laser

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A study on efficacy of high fluence Q-switched neodymium doped yttrium aluminium garnet laser in macular amyloidosis

International Journal of Research in Dermatology ◽

10.18203/issn.2455-4529.intjresdermatol20204562 ◽

2020 ◽

Vol 6 (6) ◽

pp. 755

Author(s):

Jasleen Kaur ◽

Tanreet Kaur

Keyword(s):

Nd:Yag Laser ◽

Spot Size ◽

Treatment Session ◽

Yttrium Aluminium Garnet ◽

Yag Laser ◽

Yttrium Aluminium ◽

Effective Treatment Modality ◽

Macular Amyloidosis ◽

Yttrium Aluminium Garnet Laser ◽

Systemic Therapies

Background: Macular amyloidosis (MA) typically presents as small, dusky-brown or greyish pigmented macules, treatment of which remains challenging with topical and systemic therapies, however Q-switched neodymium-doped yttrium aluminium garnet (Nd:YAG) laser has proven to be an effective treatment modality to reduce hyperpigmentation. The aim of the study is to study the efficacy of Nd:YAG laser in the management of MA.Methods: 30 female patients were treated with Q-switched Nd:YAG laser at 1064 nm with a spot size of 3 mm at a fluence of 6-7 J/cm2, frequency of 2 Hz, for 350-500 pulses. Total number of pulses decreased with each treatment session as the intensity of the hyperpigmentation decreased. The procedure was repeated at one-month intervals for a total of 6 treatment sessions.Results: After completion of treatment sessions with Nd-YAG laser 36.66% patients showed >50% improvement in the pigmentation. 66.6% patients were satisfied with the laser treatment. 33.3% patients showed <25% improvement and unsatisfied with the treatment.Conclusion: MA remains an enigma and a source of concern for the suffering patients and physicians. Q-switched Nd-YAG laser 1064 nm has shown positive response in the reduction of pigmentation in MA.

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Examination of the Effect of the Combined Use of Nd: YAG Laser Irradiation and Mechanical Force Loading on Bone Metabolism Using Cultured Human Osteoblasts

Journal of lasers in medical sciences ◽

10.34172/jlms.2020.24 ◽

2020 ◽

Vol 11 (2) ◽

pp. 138-143 ◽

Cited By ~ 1

Author(s):

Yuji Tsuka ◽

Ryo Kunimatsu ◽

Hidemi Gunji ◽

Takaharu Abe ◽

Cynthia Concepción Medina ◽

...

Keyword(s):

Bone Metabolism ◽

Laser Irradiation ◽

Mechanical Stimulation ◽

Near Infrared ◽

Yttrium Aluminum Garnet ◽

Tooth Movement ◽

Control Group ◽

Yag Laser ◽

Force Loading ◽

Centrifugal Loading

Introduction: In recent years, laser irradiation in the near-infrared ray (NIR) area has been reported to promote bone healing. There are also reports that laser irradiation accelerates orthodontic tooth movement. In this study, we investigated the effect of NIR laser irradiation and mechanical stimulation on osteoblasts. Methods: We seeded osteoblast-like cells and laser irradiation was performed 24 hours after cell seeding. In addition, a control group not receiving anything, a group receiving only Nd: YAG (neodymium-doped yttrium aluminum garnet) laser irradiation, a group receiving only centrifugal loading, and a group receiving both Nd: YAG laser irradiation and centrifugal force loading were set, and after 24 hours and after 48 hours, cells were collected and quantitative real-time polymerase chain reaction (PCR) was performed. Results: 24 hours after laser irradiation, the gene expression of alkaline phosphatase (ALP), the receptor activator of NF-κB ligand (RANKL) and osteoprotegerin (OPG) was significantly higher in the 2.0 W group than in the control group. In addition, the RANKL/OPG ratio was higher in the 2.0 W group than in the control group. Also, in the group using laser irradiation and centrifugal loading in combination, 24 hours after laser irradiation, ALP and OPG showed significantly higher values than those in the centrifugal load only group. Furthermore, the RANKL/OPG ratio also showed high values. Conclusion: These results suggest that osteoblast-like cells activate genes related to bone metabolism by combining mechanical stimulation and laser irradiation. This helps to elucidate the influence of laser irradiation during tooth movement.

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