BACKGROUND: To determine the benefit of an extensively porous coated femoral stem in patients receiving revision total hip arthroplasty. METHODS: This study reviewed the results of 35 patients who received a revision total hip arthroplasty with extensively porous coated femoral stem between August, 1996, and December, 2002. The mean follow-up period was 77.5 months. The clinical and radiological results were evaluated by the Harris hip score and serial roentgenographic findings. RESULTS: The preoperative and postoperative Harris hip score was 68.3 and 92.5, respectively. Radiographically, none of the acetabular components showed any evidence of migration, tilt, rotation, or shedding of metal particles. In addition, none of the femoral components showed evidence of subsidence, pedestal, or shedding of metal particles. Twenty-two hips had a mild stress shield and 2 hips had a moderate stress shield. The perioperative complications encountered were deep vein thrombosis (1 case), mild heterotopic ossification (4 cases), intraoperative periprosthetic fractures (1 case), and nonunion of the trochanteric osteotomy site (2 cases). CONCLUSIONS: Extensively porous coated femoral stems and acetabular components produce excellent clinical and radiological results in revision total hip arthroplasty.
Aged ; *Arthroplasty, Replacement, Hip ; *Coated Materials, Biocompatible ; Female ; *Hip Prosthesis ; Humans ; Male ; Middle Aged ; Porosity ; Reoperation

PURPOSE: The purpose of this study is to analyze the clinical and radiological results of performing primary total hip arthroplasty (THA) in patients with a fused hip and to compare the results with that of patients with avascular necrosis of the femur head (AVNF). MATERIALS AND METHODS: 19 patients (21 hips) with a fused hip(s) were retrospectively reviewed. We analyzed them clinically with using the Harris hip score (HHS), and radiologically with performing serial radiograms and we then compared them with the results of the patients in the AVNF group. RESULTS: The mean HHS was improved from 59.2 to 85.8. The VAS improved from 6.5 to 2.2 and the leg length discrepancy (LLD) improved from 27.5 mm to 12.5 mm. As complications, wound infection occurred in 3 hips, heterotopic ossification occurred in 8 hips and recurrent dislocation occurred in one hip. Although a radiolucent line was found in 4 acetabular cups and 6 femoral stems, there was no progression. Osteolysis was found in 1 acetabular cup. CONCLUSION: The results of THA in patients with a fused hip were excellent. Comparing with the AVNF group, improvement of the hip motion and LLD were much better. The improvement of the VAS and HHS showed similar results between the groups. However, the final results of the HHS, VAS, LLD and the range of motion of the hip were worse, and the complication rate was higher.
Arthroplasty ; Dislocations ; Femur Head ; Femur Head Necrosis ; Hip ; Humans ; Leg ; Necrosis ; Ossification, Heterotopic ; Osteolysis ; Range of Motion, Articular ; Retrospective Studies ; Tacrine ; Wound Infection

PURPOSE: To Analyze the Clinical Results of the Total Knee Arthroplasty without Patellar Resurfacing. MATERIALS AND METHODS: One hundred and eight Total Knee Arthroplasties (Nexgen(R), Zimmer, USA) without resurfacing of the patella, were performed between February 1995 and September 1999, and 89 cases followed up for more than 36 months were analyzed in this study. The follow up period ranged from 36 to 70 months (average 52 months). The diagnosis was degenerative joint disease in 83 cases (93%), rheumatoid arthritis in 5 cases (6%) and avascular necrosis of medial femoral condyle in 1 case (1%). The clinical results were evaluated according to Knee Society Clinical Rating System. RESULTS: The mean preoperative knee score was 34 points (range 5-63 points) according to the Knee Society Clinical Rating System, and the mean preoperative functional score was 38 points (range, 10-61 points). The mean postoperative knee score was 91 points (range 65-98 points) and the mean postoperative functional score 89 points (range, 63-100 points). The current study shows that patellar complications associated with unresurfacing did not occur, with the exception of 2 cases of persistent peripatellar pain, which resolved by a postoperative 6 months with conservative treatment. The patellofemoral joint space was also well preserved even at the 3 and 5 year follow-ups. CONCLUSION: Complications of total knee arthroplasty, such as patellar dislocation or subluxation, rupture of the patellar tendon, and fracture of the patella, can be avoided by not resurfacing the patella. On the basis of our results, there is little evidence to support routine patellar resurfacing in total knee arthroplasty.
Arthritis, Rheumatoid ; Arthroplasty* ; Diagnosis ; Follow-Up Studies ; Joint Diseases ; Knee* ; Necrosis ; Patella ; Patellar Dislocation ; Patellar Ligament ; Patellofemoral Joint ; Rupture

A 41-year-old woman with a 2-month history of diffused swelling and persistent dull pain in her right shoulder was examined. Magnetic resonance imaging (MRI) findings revealed subdeltoid bursitis and rice bodies with normal surrounding tissue and shoulder joint. Arthoscopic debridement and biopsy of the subdeltoid bursa were performed. Histologic examination of the bursal tissue showed granulomatous tissue with typical caseous necrosis. A positive culture of Mycobacterium tuberculosis confirmed the diagnosis of tuberculosis. We report on the clinical, radiological and athological findings in a patient with tuberculous subdeltoid bursitis accompanied by multiple rice body formation without coexisting active bone and joint tuberculosis, and conduct a literature review.
Adult ; Bursitis/diagnosis/*pathology/surgery ; Case Report ; Female ; Human ; Magnetic Resonance Imaging ; Tuberculosis, Osteoarticular/diagnosis/*pathology/surgery

BACKGROUND: The goal of this study is to evaluate the differences of the rate and the ratio of heart rate changes, which is well known to reflect the vagal reactivation, after peak exercise between ischemic heart disease and normal during treadmill exercise test. Additionally R-wave amplitude changes are evaluated to have the discriminal power between ischemic heart disease and normal. METHODS: We have studied 253 human (196 control, 57 patients) who took the symptom-limited exercise test using Marquette case 8000 model. The 57 patients who showed the positive result by exercise test have confirmed by coronary angiography. The rate of heart rate changes was defined as the absolute difference of the heart rate subtracted by the just-previous stage heart rate. The ratio of heart rate changes was defined as the percentile of the rate of heart rate changes comparing to the just-previous stage heart rate. The changes of R-wave amplitude at lead V5 and aVF were obtained by the subtraction of R-wave amplitude at the peak exercise stage from that at the standing rest stage respectively. Additively heart rate recovery was defined as the rate of heart rate change which was obtained at 1 minute later after peak exercise. RESULTS: In patients and control, the resting heart rate were 70 +/- 13 bpm and 69 +/- 11 bpm (p>0.05), and the peak heart rate were 136 +/- 22 bpm and 155 +/- 18 bpm respectively (p<0.001). The rate of heart rate changes in patients group were significantly lower than that in control at 1 minute, 3 minute, and 5 minute respectively (p<0.001, p=0.008, p=0.002). The ratio of heart rate changes in patients group were also significantly lower than that in control at 1 minute, 3 minute, and 5 minute respectively (p=0.017, p=0.027, p=0.002). With comparing both groups, the incidences of ventricular ectopy were not different during exercise and recovery stages, and the difference in the changes of R-wave amplitude at lead V5 and aVF were not observed respectively. CONCLUSION: The rate and ratio of heart rate changes are significantly lower in iscemic heart disease than in normal, and these are resulted from the depression of vagal reactivation. These findings are supplemental to make a diagnosis and a arrhythmic risk stratification of ischemic heart disease.
Coronary Angiography ; Depression ; Diagnosis ; Exercise Test ; Heart Diseases ; Heart Rate* ; Heart* ; Humans ; Incidence ; Myocardial Ischemia*

In the elderly, myasthenia gravis (MG) can present with bulbar symptoms, which can be clinically difficult to diagnose from other neurological comorbid conditions. We describe a case of a 75-year-old man who had been previously diagnosed with dysphagia associated with medullary infarction but exhibited aggravation of the dysphagia later on due to a superimposed development of bulbar MG. After recovering from his initial swallowing difficulties, the patient suddenly developed ptosis, drooling, and generalized weakness with aggravated dysphagia. Two follow-up brain magnetic resonance imaging (MRI) scans displayed no new brain lesions. Antibodies to acetylcholine receptor and muscle-specific kinase were negative. Subsequent electrodiagnosis with repetitive nerve stimulation tests revealed unremarkable findings. A diagnosis of bulbar MG could only be established after fiberoptic endoscopic evaluation of swallowing (FEES) with simultaneous Tensilon application. After application of intravenous pyridostigmine, significant improvement in dysphagia and ptosis were observed both clinically and according to the FEES.
Acetylcholine ; Aged ; Antibodies ; Brain ; Deglutition Disorders ; Deglutition* ; Diagnosis ; Edrophonium* ; Electrodiagnosis ; Fees and Charges ; Follow-Up Studies ; Humans ; Infarction* ; Magnetic Resonance Imaging ; Myasthenia Gravis* ; Phosphotransferases ; Pyridostigmine Bromide ; Sialorrhea ; Stroke

PURPOSE: This study was performed to investigate the influence of object shape and distance from the center of the image on the volumetric accuracy of cone-beam computed tomography (CBCT) scans, according to different parameters of tube voltage and current. MATERIALS AND METHODS: Four geometric objects (cylinder, cube, pyramid, and hexagon) with predefined dimensions were fabricated. The objects consisted of Teflon-perfluoroalkoxy embedded in a hydrocolloid matrix (Dupli-Coe-Loid TM; GC America Inc., Alsip, IL, USA), encased in an acrylic resin cylinder assembly. An Alphard Vega Dental CT system (Asahi Roentgen Ind. Co., Ltd, Kyoto, Japan) was used to acquire CBCT images. OnDemand 3D (CyberMed Inc., Seoul, Korea) software was used for object segmentation and image analysis. The accuracy was expressed by the volume error (VE). The VE was calculated under 3 different exposure settings. The measured volumes of the objects were compared to the true volumes for statistical analysis. RESULTS: The mean VE ranged from −4.47% to 2.35%. There was no significant relationship between an object's shape and the VE. A significant correlation was found between the distance of the object to the center of the image and the VE. Tube voltage affected the volume measurements and the VE, but tube current did not. CONCLUSION: The evaluated CBCT device provided satisfactory volume measurements. To assess volume measurements, it might be sufficient to use serial scans with a high resolution, but a low dose. This information may provide useful guidance for assessing volume measurements.
Americas ; Colloids ; Cone-Beam Computed Tomography* ; Imaging, Three-Dimensional ; Seoul

Osseointegrated implants are now commonplace in contemporary dentistry. However, a number of complications can occur around dental implants, including peri-implantitis, maxillary sinusitis, osteomyelitis, and neoplasms. There have been several reports of a malignant neoplasm occurring adjacent to a dental implant. In this report, we describe 2 such cases. One case was that of a 75-year-old man with no previous history of malignant disease who developed a solitary plasmacytoma around a dental implant in the left posterior mandible, and the other was that of a 43-year-old man who was diagnosed with squamous cell carcinoma adjacent to a dental implant in the right posterior mandible. Our experiences with these 2 cases suggest the possibility of a relationship between implant treatment and an inflammatory cofactor that might increase the risk of development of a malignant neoplasm.
Adult ; Aged ; Carcinoma, Squamous Cell ; Dental Implants ; Dentistry ; Humans ; Mandible ; Maxillary Sinus ; Maxillary Sinusitis ; Mouth Neoplasms ; Osteomyelitis ; Peri-Implantitis ; Plasmacytoma

PURPOSE: This study was conducted to evaluate the accuracy of linear measurements of 3-dimensional (3D) images generated by cone-beam computed tomography (CBCT) and facial scanning systems, and to assess the effect of scanning parameters, such as CBCT exposure settings, on image quality. MATERIALS AND METHODS: CBCT and facial scanning images of an anthropomorphic phantom showing 13 soft-tissue anatomical landmarks were used in the study. The distances between the anatomical landmarks on the phantom were measured to obtain a reference for evaluating the accuracy of the 3D facial soft-tissue images. The distances between the 3D image landmarks were measured using a 3D distance measurement tool. The effect of scanning parameters on CBCT image quality was evaluated by visually comparing images acquired under different exposure conditions, but at a constant threshold. RESULTS: Comparison of the repeated direct phantom and image-based measurements revealed good reproducibility. There were no significant differences between the direct phantom and image-based measurements of the CBCT surface volume-rendered images. Five of the 15 measurements of the 3D facial scans were found to be significantly different from their corresponding direct phantom measurements (P < .05). The quality of the CBCT surface volume-rendered images acquired at a constant threshold varied across different exposure conditions. CONCLUSION: These results proved that existing 3D imaging techniques were satisfactorily accurate for clinical applications, and that optimizing the variables that affected image quality, such as the exposure parameters, was critical for image acquisition.
Anthropometry ; Cone-Beam Computed Tomography ; Dimensional Measurement Accuracy ; Imaging, Three-Dimensional

Mucosa-associated lymphoid tissue (MALT) lymphoma is a low grade B cell lymphoma that, occurs in numerous sites including the stomach, ocular adnexa, thyroid, lung and breast; however, primary hepatic lymphoma is extremely rare. Only about 20 cases have been reported world wide. We recently experienced a case of primary hepatic B-cell lymphoma of the MALT type in a 63-year old female patient. She presented with abdominal pain. The CT, ultrasonogram and PET-CT showed a hepatic nodular mass. A biopsy specimen of the liver revealed MALT lymphoma. There was no evidence of the lymphoma in the extrahepatic lesion. She received segmentectomy of liver and was then treated with CVP (cyclophosphamide, vincristine and prednisolone) chemotherapy. She has been followed up for 6 months since the therapy, and she remains asymptomatic.
Abdominal Pain ; B-Lymphocytes* ; Biopsy ; Breast ; Drug Therapy ; Female ; Humans ; Liver ; Lung ; Lymphoid Tissue* ; Lymphoma ; Lymphoma, B-Cell* ; Lymphoma, B-Cell, Marginal Zone ; Mastectomy, Segmental ; Middle Aged ; Stomach ; Thyroid Gland ; Ultrasonography ; Vincristine