PURPOSE: The present study was intended to evaluate the effect of soldering techniques with infrared ray and gas torch under different gap distances (0.3 mm and 0.5 mm) on the tensile strength and surface porosity formation in Ni-Cr base metal alloy. MATERIALS AND METHODS: Thirty five dumbbell shaped Ni-Cr alloy specimens were prepared and assigned to 5 groups according to the soldering method and the gap distance. For the soldering methods, gas torch (G group) and infrared ray (IR group) were compared and each group was subdivided by corresponding gap distance (0.3 mm: G3 and IR3, 0.5 mm: G5, IR5). Specimens of the experimental groups were sectioned in the middle with a diamond disk and embedded in solder blocks according to the predetermined distance. As a control group, 7 specimens were prepared without sectioning or soldering. After the soldering procedure, a tensile strength test was performed using universal testing machine at a crosshead speed 1 mm/min. The proportions of porosity on the fractured surface were calculated on the images acquired through the scanning electronic microscope. RESULTS: Every specimen of G3, G5, IR3 and IR5 was fractured on the solder joint area. However, there was no significant difference between the test groups (P > .05). There was a negative correlation between porosity formation and tensile strength in all the specimens in the test groups (P < .05). CONCLUSION: There was no significant difference in ultimate tensile strength of joints and porosity formations between the gas-oxygen torch soldering and infrared ray soldering technique or between the gap distance of 0.3 mm and 0.5 mm.
Alloys ; Collodion ; Diamond ; Electronics ; Electrons ; Infrared Rays ; Joints ; Porosity ; Tensile Strength

No abstract available.
Hospitals, General* ; Humans ; Inpatients* ; Sleep Initiation and Maintenance Disorders*

No abstract available.
Dermatomycoses* ; Humans

BACKGROUND: To investigate the effectiveness of reverse total shoulder arthroplasty (RTSA) in treating irreparable massive rotator cuff tears (RCTs). METHODS: Twenty-nine patients who underwent RTSA for the treatment of irreparable massive RCTs and completed follow-up for at least 1 year were selected. Their mean age was 69.7 years (range, 59-80 years). The mean follow-up was 17.7 months (range, 12-42 months). The shoulder range of motion was measured preoperatively and at final follow-up. The functional result was evaluated using visual analog scale (VAS) for pain, American Shoulder and Elbow Surgeon (ASES) score, and Korean Shoulder Society (KSS) score. Additionally, the shoulders were categorized into two groups depending on prior history of surgery and the clinical outcomes were analyzed between two groups. RESULTS: Mean pain VAS improved, from 6.6+/-1.2 to 2.7+/-0.9 (p=0.001), and the mean functional VAS from 35.7+/-4.2 to 73.3+/-5.4 (p=0.006). The mean ASES score improved from 37.2+/-2.8 to 75.0+/-3.8 (p=0.012). The mean KSS improved from 36.5+/-7.2 to 75.6+/-5.4 (p=0.009), the mean forward elevation from 66.3+/-4.7 to 135.6+/-8.4 (p=0.0001), and the mean abduction from 45.2+/-4.2 to 119.0+/-6.5o (p=0.0001). Internal rotation differed significantly from the first sacral to the third lumbar vertebrae (p=0.036). External rotation did not change significantly (p=0.076). There was also no statistically significant difference between groups (no previous operation versus none). Four complications occurred: one superficial infection, one with anterior dislocation, one acromial fracture, and one clavicle fracture. CONCLUSIONS: RTSA provides reliable pain relief and recovery of shoulder function in patients with massive irreparable RCTs in short-term follow-up.
Arthroplasty* ; Clavicle ; Dislocations ; Elbow ; Follow-Up Studies ; Humans ; Lumbar Vertebrae ; Range of Motion, Articular ; Rotator Cuff* ; Shoulder* ; Visual Analog Scale

BACKGROUND: Cold blood cardioplegic solution has been used to protect myocardium during open heart surgery with the hypothesis stating that it provides more oxygen supply to myocardium compared to crystalloid caridoplegic solution. We repeatedly infused cold blood cardioplegic solution to achieve myocardial protection. We biopsied a small portion of papillary muscle of patients with mitral valve replacement or double valve replacement during aortic cross-clamp time and evaluated the method of myocardial protection through the observation of changes in ultrastructure. We then analysed the relationship between changes in ultrasructure and peak postoperative CK-MB value and SGOT value. MATERIAL AND METHOD: We report observation on changes of myocardial ultrastructure, postoperative CK-MB and SGOT, and electrocardiogram in 31 patients who underwent cardiac operation. There were 11 males and 20 females, and they ranging in age from 28 to 69 years (mean score was 2.08+/-0.560, it was 2.37+/-0.558 at 40 minutes, and it was 2.36+/-0.523 at 70minutes. Mitochondrial score increased significant at 40 minutes. Mean value of postoperative peak CK-MB and SGOT were 37.3+/-17.061IU, 144.5+/-125.5IU respectively. We were not able to find any new Q were in EKG after the operation. There was no significant relationship between myocardium mitochondrial score and mean value of postoperative peak CK-MB and SGOT. CONCLUSION: In conclusion, with this study the cold blood cardioplegic solution was incomplete in preserving ultrastructure of myocardium even with satisfactory results in serum enzyme and EKG evaluation.
Aspartate Aminotransferases ; Cardioplegic Solutions ; Electrocardiography ; Female ; Heart* ; Humans ; Male ; Mitral Valve ; Myocardium ; Oxygen ; Papillary Muscles ; Thoracic Surgery*

The authors studied 54 patients (55 cases) of femoral shaft fractures treated by compression plate fixation and IM nailing from August 1986 to December 1991. The purpose of this study is to analyse comparatively the radiological and clinical results between the compression plate fixation and IM nailing in femoral shaft fracture of adult. The obtained results were as follows: 1. Among the 54 patients, the ratio of male and female was 44: 10, and the highest in cidence of age was between 3rd and 4th decades. 2. The main cause of injury was traffic accident in 38 cases. 3. The most common fracture type was B1-② in ten cases by AO-ASIF classification. 4. The mean duration of union was 13 weeks in compression plate fixation by the Koostra's criteria and the average 23 weeks in IM nailing by the Bjorens criteria. 5. The clinical result according to Margerl et al, was good in 25 cases (80.6%) with compression plate fixation and good in 20 cases (83.3%) with intramedullary fixation. 6. Complications of compression plate fixation were metal failure in 2 cases and deep wound infection in 1 case, and 1 case of femur neck fracture during operation and 1 case of metal failure in intramedullary fixation.
Accidents, Traffic ; Adult ; Classification ; Female ; Femoral Neck Fractures ; Fracture Fixation, Intramedullary ; Humans ; Male ; Wound Infection

To evaluate correlation between the amount of oncogene products in tumor cell extracts and malignant potentiality in breast tumor, immunohistochemical staining for the ras Oncogene products was performed in the sections of benign and malignant lesions of the breast. The results obtained were as follows: 1) The positive reaction to ras Oncogene products was usually observed in the cytoplasm and cell membrane. 2) The ratio of positive reaction was 30.4% in epithelial hyperplasia of fibrocystic disease, 26.5% in fibroadenoma. 49.5% in intraductal carcinoma 71.6% in infiltrating ductal carcinoma, 85.2% in metastatic infiltrating ductal carcinoma, and 89.7% in relatively preserved neighboring lobules of infiltrating ductal carcinoma. In conclusion, the ras oncogene products are found by a significantly higher ratio in the more aggressive lesions, and the infiltrating ductal carcinoma might represent its potential of malignant transformation. 3) The expression of ras oncogene was heterogeneous in primary as well as metastatic mammary carcinomas.
Neoplasm Metastasis

To evaluate the detection of HPV DNA according to subtype of lesions of uterine cervix and its clinical applicability, in situ hybridization (ISH) and immunohistochemistry for HPV were performed in 189 cases of uterine cervical lesion, including 23 cases of low grade squamous intraepithelial lesion (SIL), 115 cases of high grade SIL and 51 cases of invasive carcinoma. Positive immunostaining, brown precipitate, was mainly noted in the nucleus of koilocytes in the superficial and intermediate layer. Positivity of immunostaining was 21.7% in low grade SIL, 13.0% in high grade SIL and 9.8% in invasive carcinoma. Positive reaction in ISH, red precipitate, was noted in the nucleus of not only koilocytes but also non-koilocytes in the superficial and intermediate layer, and dot precipitate was rarely identified in the nest of squamous cell carcinoma. Based on HPV subtype, 6/11 was 21.7% in low grade SIL, 16/18 was 32.2% and 39.2% in high grade SIL and invasive carcinoma, respectively. With regard to their associated HPV types, low grade SILs were heterogeneous and high grade SILs and invasive carcinomas were related with the high oncogenic risk group only. The correlation of HPV subtypes with panHPV was 91.3% in low grade SIL, 91.3% in high grade SIL and 98.0% in invasive carcinoma. These results suggest that detection of HPV infection by ISH may be a more useful method than immunohistochemistry and application of the HPV subtype probe with the panHPV probe could improve the sensitivity of ISH.
Carcinoma, Squamous Cell ; Cervix Uteri* ; DNA ; Female ; Humans* ; Immunohistochemistry* ; In Situ Hybridization*

A malignant granular cell tumor (MGCT) occurred in the left shoulder of a 62-year-old man. The patient underwent wide marginal excision followed by chemotherapy and radiotherapy. A metastatic tumor was identified in the axillary lymph node 22 months after the excision of the shoulder mass. The primary tumor was a poorly circumscribed mass measuring 5 5 4 cm. On cut section, it was a solid mass with yellowish tan color. Histologically, both primary and metastatic tumor consisted of polygonal cells with abundant granular cytoplasm and a vesicular nucleus with a prominent nucleolus. Two to three mitotic figures per ten high power fields at 200 were counted. Tumor cells were weakly stained with periodic acid-Schiff (PAS) preparation both before and after diastase digestion, and were positive for S-100 protein, neuron-specific enolase (NSE), and vimentin. By electron microscopy, the cytoplasm was filled with numerous autophagolysosomes containing myelin figures, mitochondria, and fragmented rough endoplasmic reticula. Basal laminae and angulated bodies were also noted. These findings suggest schwannian differentiation of this tumor.
Amylases ; Basement Membrane ; Cytoplasm ; Digestion ; Drug Therapy ; Granular Cell Tumor* ; Humans ; Immunohistochemistry ; Lymph Nodes ; Microscopy, Electron ; Middle Aged ; Mitochondria ; Myelin Sheath ; Phosphopyruvate Hydratase ; Radiotherapy ; S100 Proteins ; Shoulder* ; Triacetoneamine-N-Oxyl ; Vimentin

Mutation of the p53 tumor-suppressor gene in exons 4 through 9 was examined in 34 cases of primary advanced gastric cancer using PCR-SSCP (polymerase chain reaction-single strand conformation polymorphism) and the results were compared with p53 protein expression as determined by immunohistochemistry (IHC) using a monoclonal antibody(DO-1). p53 protein detected by IHC was observed in 14 cases (41.2%) and genotypic mutation detected by PCR-SSCP in exons 4-9 was observed in 13 cases (38.2%) One case showed an aberrant band on PCR-SSCP both in Exon 7 and Exon 8/9. p53 alteration detected by either IHC or PCR-SSCP was observed in 19 cases (55.9%), but only 8 cases (23.5%) showed both p53 mutation and protein expression. We also tried to obtain the correlation between relative intensity of the shifted bands on PCR-SSCP and percentage of positive cells by IHC, but a significant correlation was not seen between relative intensity of shifted bands on PCR-SSCP and positve cell ratio. A discrepancy between p53 protein expression and p53 mutation is observed in primary gastric carcinomas. The reason for this discrepancy are not apparent. However, examination of gastric carcinomas for mutations in other exons may identify a better correlation with protein overexpression. The results obtained in this study suggest that the negative reaction for p53 immunohistochemistry may not necessarily mean no genetic alteration of the p53 locus.
Exons ; Immunohistochemistry* ; Stomach Neoplasms