The purpose of this study was to investigate the stress distribution of the abutment and supporting tissues according tot he slopes and types of the guiding plane of distal extension removable partial dentures. The 3-dimensional finite element method was used and the finite element models were prepared as follows. Model I : Kratochvil type guiding plane with 90degree to residual ridge Model II : Kratochvil type guiding plane with 95degree to residual ridge Model III : Kratochvil type guiding plane with 100degree to residual ridge Model IV : Krol type guiding plane with 90degree to residual ridge Distal extension partial denture which right mandibular first and second molar were lost was used and the second premolar was prepared as primary abutment with RPI type retainer. Then 150N of compressive force was applied to central fossae of the first and second molars and von Mises stress and displacement were measured. The results were as follows : 1. Model I and Model IV showed a similar stress distribution pattern and the stress was concentrated on the apex of the root of the abutment. 2. The stress was increased and concentrated on mesial side of the root of the abutment in Model II. The stress was concentrated on buccal and mesiobuccal side of the root of the abutment in Model III. 3. In Model I, the root of the abutment displaced and twisted a little in clockwise. In Model IV, the root of the abutment displaced to distolingually at apical region of the root and mesiobucally at cervical region of the root. 4. In Model II, the root of the abutment displaced to mesiolingually at apical region of the root and more displaced and twisted in counterclockwise at cervical region of the root. In Model III, the root of the abutment displaced to mesiobucally at apical region of the root and more displaced and twisted in clockwise at cervical region of the root.
Bicuspid ; Denture, Partial ; Denture, Partial, Removable* ; Molar

No abstract available.
Apgar Score ; Humans* ; Umbilical Cord*

Pretwisting the patellar tendon graft has been advocated hy many authors. Lambert has described a 90 degrees pretwist to benifit the fat pad vascular supply as well as to "" simulate the helicoid course of the ACL "". This technique has also been recommended to fascilitate fixation. Jackson has recommended a 90 pretwist to decrease the possibility of abrasive wear on the tunnel edge, and also to fascilitate fixation as much as a 180 degrees pretwist has heen recommended. However, in spite of all these recommendations, little work has been done on the effect of such pretwisting on the biomechanical behavior of patellar tendon grafts. The purpose of this study is to discover, by experiment, the effects of a 360 degrees external rotation pretwist on the following tensile mechanical properties of canine central 1/3 patellapatellar tendon-tibia complex : (a) ultimate stress, (b) ultimate strain, (c) average elastic modulus, and (d) strain energy density. Five groups of each S specimens were divided as group 1 (0 degrees external rotation), group 2 (90 degrees external rotation). group 3 (180 degrees external rotation), group 4 (270 degreesexternal rotation), and group 5 (360 degrees external rotation). The direction of pretwist meant the twist of tibia around patella. The effects of pretwist were analyzed using parameter one-way analysis of variance (ANOVA)(P1) and nonparameter Kruskal-Wallis one-way analysis of variance (ANOVA)(P2) with repeated measures followed by Scheff multiple comparison test. A p values of < 0.05 was considered statistically significant. Among each groups ultimate stress (P1=0.059, P2=0.095), ultimate strain(P1=0.154, P2=0. l65), and average elastic modulus(P1=0.814, P2=0.818) were not statistically significant. Only strain energy density was the statistically significant difference between group 2 and group 5(P1=0.008, P2=0.022). As a result, there were observed that the ultimate stress and strain energy density were decreased and ultimate strain was decreased but there were not statistically significant differences hetween groups because of the small number of samples, and there will be advantages for graft to avoid ahrasive wear on the tunnel edge and lateral femoral condyle. But, more studies are needed for human being in the future.
Adipose Tissue ; Elastic Modulus ; Humans ; Patella ; Patellar Ligament* ; Tibia ; Transplants

No abstract available.
Cisterna Magna*

Bladder stone formation may be associated with the intravesical foreign body. Frequency of bladder foreign body in female is less than male. We present a case of bladder stone formation for nylon suture materials in a 47-year-old female patient who has been treated by bladder neck suspension for stress incontinence. Patient was successfully treated by surgical removal of suture materials without recurrence of stress incontinence.
Female ; Foreign Bodies* ; Humans ; Male ; Middle Aged ; Neck* ; Nylons ; Recurrence ; Sutures ; Urinary Bladder Calculi* ; Urinary Bladder*

PURPOSE: For the early diagnosis of Henoch-Schonlein purpura(HSP) presenting with acute abdominal pain preceding skin rash. METHODS: The clinical, endoscopic and radiological records of 23 cases of HSP, presenting with gastrointestinal symptoms preceding skin rash were reviewed. RESULTS: The intervals from the onset of abdominal pain to the development of the skin rash were one day to 30 days(median five days), most of them were within two weeks. The presenting abdominal symptoms were abdominal pain(23 cases), vomiting(16 cases), hematochezia or melena(eight cases) and hematemesis(three cases). The abnormal endoscopic findings include coalescing erythematous lesions, areas of submucosal hemorrhage and superficial erosions and ulcers. The upper gastro intestinal endoscopy showed the abnormalities in 21 of 23 cases, which were observed in the duodenum(21 cases), the stomach(12 cases) and the esophagus(one case). Duodenitis with hemorrhage and/or erosions in the descending duodenum was the sole endoscopic abnormality in two cases and was the most marked finding in three cases. Sigmoidoscopy showed the abnormalities in six of eight cases. The abdominal ultrasonogram showed abnormalities in 12 of 17 cases, which included small bowel wall thickening(eight cases) and intramural hemorrhage(three cases). Recurrences after three months of symptom free intervals developed in four cases; three of them had persistent nephritis beyond one year. CONCLUSION: The erosive hemorrhagic duodenitis in the descending duodenum in the upper endoscopy and the small bowel wall thickening in the abdominal ultrasonogram can be useful findings in the diagnosis of HSP presenting with acute abdomen.
Abdomen, Acute ; Abdominal Pain* ; Diagnosis ; Duodenitis ; Duodenum ; Early Diagnosis ; Endoscopy ; Exanthema* ; Gastrointestinal Hemorrhage ; Hemorrhage ; Nephritis ; Purpura* ; Recurrence ; Sigmoidoscopy ; Skin* ; Ulcer ; Ultrasonography

No abstract available.
Neurofibromatoses* ; Neurofibromatosis 1*

Nucleolar organizer regions (NORs) are loops of DNA which occur in the nucleoli of cells which possess ribosomal RNA genes. The numbers and areas of NORs have been thought to be related to cellular activities. We aimed to investigate the direct relationship between the parameters of AgNORs and cellular proliferative activity using immunohistochemical method with the monoclonal antibody Ki-67, which demonstrates proliferating nuclei. The sequential technique for the simultaneous Ki-67 immunostaining and NOR staining was applied to the same slides of a series of non-Hodgkin's lymphomas (NHL) of the low, intermediate, and high grade type. The number of AgNOR per cell was counted and mean NOR percentage nuclear area (NPNA) was measured by morphometry in both the Ki-67 positive and Ki-67 negative nuclei. The increased immunoreactivity for Ki-67 was found in the high grade than in the low grade non-Hodgkin's lymphoma. This was reflected in the two areas of the palatine tonsils and lymph nodes, the positive cell counts being higher in the follicle center nuclei than in those in the interfollicular compartment. In general the numbers and NPNA of AgNORs were higher in the Ki-67 positive nuclei than in those lacking the antigen in malignant lymphomas as well as in control. The AgNORs numbers and NPNA in controls were the highest in the Ki-67 positive cells in the follicular area and the lowest in the Ki-67 negative cells in the perifollicular area. In malignant lymphomas the numbers and NPNA of AgNORs tended to increase in proportion to their grade in both the Ki-67 positive and negative cells. The numbers of AgNORs of the high grade and the NPNA of the intermediate and the high grade were significantly higher in Ki-67 positive cells than in Ki-67 negative ones. With this double staining method it was now possible to confirm that numbers and NPNA of AgNORs were directly related to the cellular proliferative activity. In maligant lymphoma, among the several parameters of the AgNORs, NPNA in Ki-67 positive cells is proposed to be the most useful marker in determining the prognosis of the patient.
Cell Count ; DNA ; Genes, rRNA ; Humans ; Lymph Nodes ; Lymphoma* ; Lymphoma, Non-Hodgkin ; Nucleolus Organizer Region* ; Palatine Tonsil ; Prognosis

No abstract available.
Endometrial Neoplasms* ; Female

Radioiodinated oxytocin prepared by the lactoperoxidase method exhibited a substantial biologic activity in uterotonic assay of the rat uterus. 125I-oxytocin was bound to the uterine membrane particulate fraction, but the unlabelled oxytocin did not inhibit the binding of 125I oxytocin to the membrane fraction of rat uterus. Cold iodinated oxytocin, however, inhibited the 125I-oxytocin binding to the membrane fraction of rat uterus in proportion to its concentration. These results suggest that 125I-oxytocin is not a suitable radioligand for oxytocin receptor binding study.
Animal ; Binding Sites ; Cell Membrane/metabolism ; Female ; Iodine Radioisotopes/metabolism* ; Oxytocin/metabolism* ; Radioligand Assay ; Rats ; Receptors, Cell Surface/analysis* ; Uterus/metabolism*