Lichen amyloidosis is a chronic, benign and relatively rare disease, but not infrequent in Korea. The patients with lichen amyloidosis visited to Dermatologic Department of Severance Hospital in 1969. The results of clinico-pathological findings observed in above patients were presented. Case 1-A 56 year old farmer has been suffered from pruritic lichenoid papules which developed in the right pretibial area for 10 years. These papules were reddish-brown in color, 1 to 2mm in. diameter and closely aggregated. The whole gross lesion measured 10 by 25 cm. Cases 2-A 32 year old obese house-wife complained of pruritic eruptions in the right pretibial area for 3 years. Shiny firm papules, measuring approximately 2 mm in diameter, were red in color and gross entire lesion was estimated to 7 by 10 cm. Histological examination by employing the stain method of crystal violet and the Nomland test demonstrated the amyloid mass in the papillary portion of dermis. All laboratory studies including complete blood count (CBC), chest X-ray, sedimentation rate, urinalysis (including test for Bence Jones protein), blood glucose, blood urea nitrogen (BUN), serum cholesterol, venereal disease research laboratories test for syphilis (VDRL), stool for occult blood, serum protein electrophoresis, electrocardiogram (ECG) and intravenous congo red test, were within normal limit. The therapeutic results were not promissing, however itching and lichenoid papules were disappeared during the treatment with steroid cream for occlussive dressing therapy.
Adult ; Amyloid ; Amyloidosis* ; Bandages ; Blood Cell Count ; Blood Glucose ; Blood Urea Nitrogen ; Cholesterol ; Congo Red ; Dermis ; Electrocardiography ; Electrophoresis ; Gentian Violet ; Humans ; Korea ; Lichens* ; Middle Aged ; Occult Blood ; Pruritus ; Rare Diseases ; Sexually Transmitted Diseases ; Syphilis ; Thorax ; Urinalysis

PURPOSE: This study aimed to evaluate the effect of implant thread depth on primary stability in low density bone. MATERIALS AND METHODS: The insertion torque was measured by inserting Ti implants with different thread depths into solid rigid polyurethane blocks (Sawbones) with three different bone densities (0.16 g/cm3, 0.24 g/cm3, and 0.32 g/cm3). The insertion torque value was evaluated with a surgical engine. The static compressive strength was measured with a universal testing machine (UTM) and the Ti implants were aligned at 30degrees against the loading direction of the UTM. After the static compressive strength test, the Ti implants were analyzed with a Measurescope. RESULTS: The Ti implants with deeper thread depth showed statistically higher mean insertion torque values (P<.001). Groups A and group B had similar maximum static compressive strengths, as did groups C and D (P>.05). After the static compressive strength, the thread shape of the Ti implants with deeper thread depth did not show any breakage but did show deformation of the implant body and abutment. CONCLUSION: The implants with deeper thread depth had higher mean insertion torque values but not lower compressive strength. The deep threads had a mechanical stability. Implants with deeper thread depth may increase the primary stability in areas of poor quality bone without decreasing mechanical strength.
Bone Density ; Compressive Strength ; Dental Implants* ; Polyurethanes ; Torque

PURPOSE: This study aimed to evaluate the effect of implant thread depth on primary stability in low density bone. MATERIALS AND METHODS: The insertion torque was measured by inserting Ti implants with different thread depths into solid rigid polyurethane blocks (Sawbones) with three different bone densities (0.16 g/cm3, 0.24 g/cm3, and 0.32 g/cm3). The insertion torque value was evaluated with a surgical engine. The static compressive strength was measured with a universal testing machine (UTM) and the Ti implants were aligned at 30degrees against the loading direction of the UTM. After the static compressive strength test, the Ti implants were analyzed with a Measurescope. RESULTS: The Ti implants with deeper thread depth showed statistically higher mean insertion torque values (P<.001). Groups A and group B had similar maximum static compressive strengths, as did groups C and D (P>.05). After the static compressive strength, the thread shape of the Ti implants with deeper thread depth did not show any breakage but did show deformation of the implant body and abutment. CONCLUSION: The implants with deeper thread depth had higher mean insertion torque values but not lower compressive strength. The deep threads had a mechanical stability. Implants with deeper thread depth may increase the primary stability in areas of poor quality bone without decreasing mechanical strength.
Bone Density ; Compressive Strength ; Dental Implants* ; Polyurethanes ; Torque

BACKGROUND: Mycobacterium abscessus is the most pathogenic and drug-resistant rapid-growing mycobacterium. Clarithromycin or azithromycin are the only regular oral antimycobacterial agents that have an effect on M. abscessus. We tried to detect the clarithromycin-resistant strains from the clinical isolates of M. abscessus. METHODS: We tried to isolate the clarithromycin-resistant strains from 220 clinical isolates of M. abscessus by performing using reverse hybridization assay (RHA) and the broth microdilution test (BMT). RESULTS: Seven resistant strains (3.2%) from all the tested clinical isolates were detected by BMT. Three of these resistant strains were also detected by RHA and it was confirmed that they had point mutants. CONCLUSION: These results showed that clarithromycin resistance in M. abscessus clinical isolates is related to a point mutation and other unknown mechanisms.
Anti-Bacterial Agents ; Azithromycin ; Chimera ; Clarithromycin ; Mycobacterium ; Point Mutation