The color change of maxillofacial silicone has been attributed to certain environmental factors such as exposure to the UV component of natural sunlight, wetting and drying of the elastomer, and surface abrasion resulting from the application and removal of cosmetics. The purpose of this study was to evaluate the color change of maxillofacial silicone (Silastic MDX4-4210) according to type of pigment (cadmium yellow, titanium white, cosmetic red), and UV absorber application method after 200, 400, and 600 hours of 350nm UV light irradiation. The results were as follows. 1. According to type of pigments, after 200 hours cosmetic red showed significantly larger color change than cadmium yellow and titanium white, and after 400 and 600 hours color change significantly decreased in the order of cosmetic red, cadmium yellow, and titanium white (p<0.05). 2. In the cadmium yellow group, after 200 hours, the non-treatment group showed significantly larger color change, but after 400 and 600hours, color change significantly decreased in the order of non-treatment, surface application and mixed group (p<0.05). 3. In the titanium white group, there was no significant color change difference between the three groups after 200 and 400 hours, but after 600 hours, the mixed group showed significantly smaller color change than the non-treatment and surface application groups (p<0.05). 4. In the cosmetic red group, there was significant decrease in color change in the order non-treatment, surface application and mixed group (p<0.05). From the results above, the effect of UV light absorber differed according to the type of pigment, but mixing UV light aborber with maxillofacial silicone is thought to give superior resistance against UV light irradiation in the long run.
Cadmium ; Elastomers ; Silicones* ; Sunlight ; Titanium ; Ultraviolet Rays*

No abstract available.
Bone Plates ; Mandible ; Odontoma ; Transplants

No abstract available.
Hydrops Fetalis*

No abstract available.
Female ; Humans ; Ovary*

OBJECTIVE: There are few reports on the clinical outcomes of the percutaneous endoscopic lumbar discectomy(PELD) with laser for the treatment of far lateral lumbar disc herniation. The objective of this study is to assess the safety and efficacy of the PELD with laser for the treatment of far lateral lumbar disc herniation. METHODS: The clinical records of 42 patients who had far lateral lumbar disc herniation and underwent PELD with laser between January 1996 and August 2002 were analyzed retrospectively. There were 24(57.1%) males and 18(42.9%) females, with a mean age of 53(range, 26-73) years. The surgical procedure was performed via a posterolateral approach after induction of a local anesthesis. The clinical outcomes were measured with MacNabO s criteria. The mean follow-up period was 38(range, 5-77) months. RESULTS: Clinical outcomes were revealed as follows: excellent in 28 patients(66.7%); good in 11(26.2%); fair in 2(4.7%); and poor in 1(2.4%). Therefore, the percentage of successful(excellent and good) outcomes was 92.9%. There was no statistically significant variation in the success rates according to age and operation level(p>0.05). Before the introduction of the high resolution endoscope, the success rate was 90.3% but after upgrading to the high resolution endoscope, the success rate was 100%, and there was a statistically significant variation in the success rate(p<0.05). In all cases, there was no complication or recurrence. CONCLUSION: As a minimally invasive surgery, PELD with laser is a safe and efficacious procedure for the treatment of far lateral disc herniation.
Diskectomy* ; Endoscopes ; Female ; Follow-Up Studies ; Humans ; Male ; Recurrence ; Retrospective Studies ; Surgical Procedures, Minimally Invasive

No abstract available.
Lymphoma, Large-Cell, Anaplastic*

Sunlight is one of the well-established factors which play key roles in the induction and exacerbation of lupus erythematosus. In two patients of discoid lupus erythematosus, we have experimentally reproduced skin lesions by provocative phototesting. Both UVA (100 joules/cm²) and UVB (80 millijoules/cm²) radiation induced the skin lesions. The reproduced skin lesions were clinically and histopathologically consistent with lupus erythematosus.
Humans ; Lupus Erythematosus, Discoid ; Reproduction* ; Skin ; Sunlight

The composition of triglycerides of the axillary sebaceous glands in 10 patient, with osmidrosis and 10 patients with hyperhidrosis was analyzed by high pressure liquid chromatography. Sebaceous glands were isolated and dissected by Kellum's method, and lipids were extracted by Folchs method. Individual triglycerides were separated by high pressure liquid chromatography and fatty acid composition of triglycerides was analyzed by gas-liquid chromatography. A number of individual triglycerides were identified: Fraction 1 consisted of dimyristoarachidonin, dilinoleioarachidonin, and myristol inoleioarachidonin, fraction 2 was trilinolein, fraction 3 was dilinoleioolein, fraction 4 was dilinoleiopalmitin, fraction 5 consisted of dioleiolinolein, dipalmitolinoleiri, and palmitooleilinolein. In osmidrosis patients, cornpositions of fraction 1, 2, 3, 4, and 5 were 5, 4%. 18.5% 29.5% 32.0% 14.1% of total triglycerides, respectively. In hyperhidrosis patients, cornpositions of fraction 1, 2, '3, 4, and 5 were,5, 9%, 20. 6%, 30. 9% 32. 1%, 14. 5% of total triglycericles, resectively. There were no differences in composition of triglycerides of sekaceous glands between osmidrosis patients and hyperhidrosis patients and hyperhi.frosis patients.
Chromatography, Gas ; Chromatography, Liquid ; Humans ; Hyperhidrosis ; Sebaceous Glands* ; Soil* ; Triglycerides*

No abstract available.
Amenorrhea* ; Female

STATEMENT OF PROBLEM: Bioactive materials must have the ability to spontaneously form a bone like apatite layer on their surface and induce direct biochemical bonding to bone. A simple chemical treatment via alkali and heat has been revealed to induce bioactivity in titanium. PURPOSE: The purpose of this study was to evaluate the surface characteristics and stability of alkali and heat treated implants. MATERIAL AND METHODS: Specimens were divided into three groups; group 1 was the control group with machined surface implants, groups 2 and 3 were treated with alkali solutions and heat treated in the atmosphere and vacuum conditions respectively. The surface characteristics were observed with FESEM, XPS, TF-XRD and AFM. Stability was evaluated with the resonance frequency analysis, periotest and removal torque values. One-way ANOVA and Duncan test were used for statistical analysis. RESULTS: 1. Groups treated with alkali and heat showed similar characteristics. Groups 2 and 3 showed high compositions of Na ions on the surface with sub-micron sized pores compared to group 1. Group 2 showed mixed compositions of anatase and rutile with superior contents of rutile. 2. Resonance frequency analysis : The ISQ of group 2 showed significantly higher values than that of groups 1 and 3 at 12 weeks. The ISQ of groups 1 and 2 showed significant increase after 4 weeks, and the ISQ of group 3 increased significantly after 2 and 4 weeks respectively (P < .05). 3. Periotest: The PTV of groups 1 and 2 showed significant decrease after 4 weeks, and the PTV of group 3 showed significant decrease after 2 and 4 weeks respectively (P < .05). 4. Removal torque analysis: The removal torque value of group 2 was significantly higher than those of groups 1 and 3 at 2, 4 and 8 weeks. The removal torque values of groups 1 and 3 showed increase at 4 and 12 weeks, but the removal torque value of group 2 showed increase after 4 weeks (P < .05). CONCLUSION: An oxide layer with appropriate crystal structure and amorphous sodium titanate layer can be obtained on titanium implants through alkali and heat treatment in the atmosphere, and even alkali and heat treatment in vacuum conditions, provided a bioactive surface containing sodium. These surface layers can be considered to be effective for enhancement of osseointegration and reduction of healing period for implant treatment.
Alkalies ; Atmosphere ; Hot Temperature ; Ions ; Osseointegration ; Oxides ; Saturn ; Sodium ; Titanium ; Torque ; Vacuum