No abstract available.
Neodymium* ; Onychomycosis* ; Pilot Projects*

Neodymium YAG (Nd-YAG) laser is a new instrument for the treatment of various urologic disorders where coagulation is necessary but still limited in cases. It avoids many of the side effects of electrocoagulations. Nd.YAG Iaser is a safe and effective modality, reducing blood loss, shortening operation time and preserving functional integrity on remaining renal tissue. In this experiment, to investigate the Nd-YAG Laser effect to renal tissue and the adaptation to renal surgery were aimed. We made the experimental study on renal tissue damage according to the change of irradiation time and power of NJ-YAG laser. The following results were obtained; After irradiation of Nd-YAG laser, renal tissue damage was noted on 30 Watt, 3 seconds and 5O Watt, 1 second, and the degree of renal tissue damage was increased with in creasing of laser power and time. A 2mm depth injured renal tissue was noted on 150-250 Joules, which coagulates the vessel with several mm diameter. Judging from the results of this experiment it may be believed that Nd-YAG laser can be adaptable to renal surgery in bleeding control without severe renal tissue damage.
Hemorrhage ; Lasers, Solid-State ; Neodymium

PURPOSE: To compare contrast sensitivity (CS) in type and degree of posterior capsule opacification (PCO) in pseudophakic eyes before and after neodymium: YAG capsulotomy. METHODS: Nine eyes with fibrosis-type PCO and 26 with Elschnig-pearl type PCO were examined for best corrected visual acuity (BCVA) and CS before and 1 week after capsulotomy. CS was tested with visual capacity analyzer (ACV) which uses a Landolt ring of 5 different spatial frequencies (SF) under two different conditions of day (100cd/m2) and night (30cd/m2). The patients were divided into two groups based on the BCVA before capsulotomy: Group A, 4 eyes and 18 eyes with below 0.63 in fibrosis-type and pearls-type PCO, respectively; Group B, 5 eyes and 8 eyes with above 0.63 in fibrosis-type and pearls-type PCO, respectively. RESULTS: The patients with PCO had worse BCVA and CS, but these were improved by Nd: YAG capsulotomy. This was not affected by the types and degrees of PCO. In the daytime condition, CS of B group was worse at all SF in patients with pearl-type PCO than in those with fibrosis-type PCO before capsulotomy, except 19 cpd (p<0.05). In the nighttime condition, CS in the two groups showed no difference at all SF (p>0.05). CONCLUSIONS: In the daytime condition, the patients with pearls-type PCO of relatively poor BCVA had lower CS than those with fibrosis-type PCO.
Capsule Opacification ; Contrast Sensitivity* ; Humans ; Neodymium ; Visual Acuity

Punctate leukoderma presents as numerous, distinct, round or oval depigmented spots. Recently, laser therapy-induced punctate leukoderma associated with various Q-switched laser and carbon dioxide laser have been reported. A 25-year-old man presented with numerous, discrete, round, confetti-like, depigmented macules on his left neck. He had undergone 3 sessions of 532-nm Q-switched Neodymium: Yttrium-Aluminum-Garnet laser treatment for café-au-lait macules three years ago. After the last laser treatment session, the punctate leukoderma had been developed. We started treatment with the 308-nm excimer laser twice a week. After 7 months of treatment duration, complete repigmentation was achieved without serious adverse effects. We recommend the 308-nm excimer laser as an effective treatment modality for laser therapy-induced punctate leukoderma.
Adult ; Humans ; Hypopigmentation ; Lasers, Excimer* ; Lasers, Gas ; Neck ; Neodymium ; Vitiligo

No abstract available.
Aluminum* ; Animals ; Horns* ; Lasers, Solid-State ; Neodymium* ; Welding ; Yttrium*

PURPOSE: Although magnetic attachment is used frequently for overdenture, it is reported that attractive force can be decreased by abrasion and corrosion. The purpose of this study was to establish the clinical basis about considerations and long term prognosis of overdenture using magnetic attachments by investigating the change in attractive force of magnetic attachment applied to the patients. MATERIALS AND METHODS: Among the patients treated with overdenture using magnetic attachments in Dankook University Dental Hospital, attractive force records of 61 magnetic attachments of 20 subjects who re-visited from July 2013 to June 2014 were analyzed. Dental magnet tester (Aichi Micro Intelligent Co., Aichi, Japan) was used for measurement. The magnetic attachments used in this study were Magfit IP-B Flat, Magfit DX400, Magfit DX600 and Magfit DX800 (Aichi Steel Co., Aichi, Japan) filled with Neodymium (NdFeB), a rare-earth magnet. RESULTS: Reduction ratio of attractive force had no significant correlation with conditional variables to which attachments were applied, and was higher when the maintenance period was longer (P<.05, r=.361). Reduction ratio of attractive force was significantly higher in the subject group in which attachments were used over 9 years than within 9 years (P<.05). Furthermore, 16.39% of total magnetic attachments showed detachment of keeper or assembly. CONCLUSION: Attractive force of magnetic attachment is maintained regardless of conditional variables and reduction ratio increased as the maintenance period became longer. Further study on adhesive material, attachment method and design improvement to prevent detachment of magnetic attachment is needed.
Adhesives ; Corrosion ; Denture, Overlay* ; Effect Modifier, Epidemiologic ; Humans ; Neodymium ; Prognosis ; Steel

With the widespread use of laser in medical and industrial settings, the incidence of laser injury to the retina continues to grow among workers involved in handling lasers. Nd:YAG laser has recently been applied on a broad basis in ophthal-mology. We present our experience of accidental Nd:YAG laser injury to the retina resulting in macular hole formation and vitreous hemorrhage, and review the literatures briefly.
Incidence ; Lasers, Solid-State* ; Neodymium* ; Retina ; Retinal Perforations ; Retinaldehyde* ; Vitreous Hemorrhage

The gastric polyps may be premalignant lesions and they should be removed as possible. The gastric polyps can be remoued by various endoscopic methods. The safety and therapeutic effectiveness of snare polypectomy, neodymium YAG laser therapy and electrocutery were compared in a total number of 106 patients who were diagnosed as benign polyps by means of endoscopic biopsy.Safety was evaluated by the rate of complications such as perforation and bleeding, and therapeutic effectiveness was evaluated by the average numbers of treatment session of each modality. Average numbers of treatment session of snare polypectomy, laser therapy and electrocautery were 1.04, 1.38 and l.44, respectively. Average numbers of treatment session of snare polypectomy were significantly (p<0.05) lower than those of other two methods. Perforation was not occurred in any group. Bleeding rates after snare polypectomy, laser therapy and electrocautery were 17.4%, 1.0% and 3.8%, respectively. Bleeding was significantly (p<0,05) more frequent after snare polypectomy than after other two methods. In conclusion therapeutic effectiveness was best in snare polypectomy but complication was most frequent after snare polypectomy. There was no difference between laser therapy and electrocautery for therapeutic effectiveness and safety. Therfore, laser therapy and electrocautery caa be used for the removal of flat adenoma, alternatively.
Adenoma ; Electrocoagulation ; Hemorrhage ; Humans ; Laser Therapy ; Lasers, Solid-State ; Neodymium ; Polyps ; SNARE Proteins

The gastric polyps may be premalignant lesions and they should be removed as possible. The gastric polyps can be remoued by various endoscopic methods. The safety and therapeutic effectiveness of snare polypectomy, neodymium YAG laser therapy and electrocutery were compared in a total number of 106 patients who were diagnosed as benign polyps by means of endoscopic biopsy.Safety was evaluated by the rate of complications such as perforation and bleeding, and therapeutic effectiveness was evaluated by the average numbers of treatment session of each modality. Average numbers of treatment session of snare polypectomy, laser therapy and electrocautery were 1.04, 1.38 and l.44, respectively. Average numbers of treatment session of snare polypectomy were significantly (p<0.05) lower than those of other two methods. Perforation was not occurred in any group. Bleeding rates after snare polypectomy, laser therapy and electrocautery were 17.4%, 1.0% and 3.8%, respectively. Bleeding was significantly (p<0,05) more frequent after snare polypectomy than after other two methods. In conclusion therapeutic effectiveness was best in snare polypectomy but complication was most frequent after snare polypectomy. There was no difference between laser therapy and electrocautery for therapeutic effectiveness and safety. Therfore, laser therapy and electrocautery caa be used for the removal of flat adenoma, alternatively.
Adenoma ; Electrocoagulation ; Hemorrhage ; Humans ; Laser Therapy ; Lasers, Solid-State ; Neodymium ; Polyps ; SNARE Proteins

PURPOSE: To treat pupillary membrane which developed after cataract operation and vitrectomy,steroid eye drops with mydriatics or, in sever case, tPA has been used. However steroid eye drops needs prolonged treatment and tPA has many complications such as, infection, or hemorrhage. We tried to remove pupillary membrane with Nd-YAG laser by using peripheral quadrantic disruption technique. METHODS: We treated 8 eyes from Jan. 1996 to Oct. 1999, and observed within 24 hours following Nd-YAG laser treatment. The pupillary membrane was cut with Nd-YAG laser and subsequently absorbed within 24 hours. RESULTS: There was no such complicaitons, as increased IOP, hemorrhage, and IOL damage. Immediately after Nd-YAG laser, visual acuity was improved and fundus was examined. CONCLUSION: Therefore we recommend Nd-YAG laser membrenectomy in cases of pupillary membrane, which did not respond to steroid therapy.
Cataract ; Hemorrhage ; Lasers, Solid-State* ; Membranes* ; Mydriatics ; Neodymium* ; Ophthalmic Solutions ; Visual Acuity