No abstract available.
Aged* ; Humans ; Hydroxymethylglutaryl-CoA Reductase Inhibitors* ; Hypercholesterolemia*

As modern society becomes increasingly complex, there has been a steady increase in violence, as well as in automobile and industrial accidents. This has resulted in an increased incidence of facial injuries, including mandibular fractures. Many methods have been advocated to achieve reestablishment of normal feature and function. The choice generally depends upon such factors as location of the fractures, displacements, status of the dentition and favorability of the fracture line. Many cases of mandibular fracture are treated by intermaxillay fixation using an arch bar or bite block(acrylic splint)for rapid bone union and minimal displacement. However, there had been some problems, such as discomfort to patients, limitation to eating and weight loss, poor oral hygiene, and temporomandibular joint ankylosis. As a consequence, we have modified the shape of the acrylic splint and method of fixation for circum-mandibular fixation instead of intermaxillary fixation. Acrylic splints are rigid, strong, easily adjusted and repaired, translucent, lightweight and well tolerated by the oral mucosa. The splints are properly secured to each tooth and bind all the teeth together as a single unit. Authors have used modified acrylic splints as tools of circum-mandibular fixation in 12 cases of mandibular symphysis and body fracture from May 1997 to August 1998, achieving the results of very good occlusal relationship, oral hygiene and comfort to patients.
Accidents, Occupational ; Ankylosis ; Automobiles ; Dentition ; Eating ; Facial Injuries ; Humans ; Incidence ; Mandibular Fractures* ; Mouth Mucosa ; Oral Hygiene ; Splints* ; Temporomandibular Joint ; Tooth ; Violence ; Weight Loss

Various methods of nasal reconstruction were performed over time. The physiology and anatomy of nose were clarified and its aesthetic subunits were employed, more improvement and modification were performed. The bilobed flap is particularly suitable for reconstruction of small or medium sized nasal defect up to 1.5 cm in diameter. Authors performed 6 cases of the bilobed flap for the defect of nasal dorsum (4 cases: basal cell carcinoma, 2 cases: compound nevus) from March 2000 to February 2001. The bilobed flap was medially based and second lobe was positioned on the nasal alar groove. This flap results in little or no distortion around tissue, by which scars of nasal dorsum and dog-ear deformity are reduced. Moreover we could achieve better cosmetic results for the scar, primary repair site of the second lobe, which is concealed by nasal alar groove.
Carcinoma, Basal Cell ; Cicatrix ; Congenital Abnormalities ; Nose ; Physiology

The purpose of this study is to evaluate the diagnostic accuracy of various quantitative indices for the differentiation of benign from malignant primary soft tissue tumors by FDG-PET. A series of 32 patients with a variety of histologically or clinically confirmed benign (20) or malignant (12) soft tissue lesions were evaluated with emission whole body (5min/bed position) PET after injection of [18F]FDG. Regional 20min transmission scan for the attenuation correction and calculation of SUV was performed in 16 patients (10 benign, 6malignant) followed by dynamic acquisition for 56min. Postinjection transmission scan for the attenuation correction and calculation of SUV was executed in the other 16 patients (10 benign, 6 malignant). The following indices were obtained : the peak and average SUV (pSUV, aSUV) of lesions, tumor-to-background ratio acquired at images of 51 min p.i. (TBR51), tumor-to-background ratio of areas under time-activity curves (TBRarea) and the ratio between the activities of tumor ROI at 51 min p.i. and at the time which background ROI reaches maximum activity on the time-activity curves (T51/Tmax). The pSUV, aSUV, TBR51, and TBRarea, in malignant lesions were significantly higher than those in benign lesions. We set the cut-off values of pSUV, aSUV, TBR51, TBRarea and T51/Tmax for the differentiation of benign and malignant lesions at 3.5, 2.8, 5.1, 4.3 and 1.55, respectively. The sensitivity, specificity and accuracy were 91.7%, 80.0%, 84.4% by pSUV and aSUV, 83.3%, 85.0%, 84.4% by TBR51, 83.3%, 100%, 93.8% by TBRarea and 66.7%, 70.0%, 68.8% by Tsl/Tmax. The time-activity curves did not give additional information compared to SUV or TBR. The one false negative was a case with low-grade fibrosarcoma and all four false positives were cases with inflammatory change on histology. The visual analysis of FDG-PET also detected the metastatic lesions in malignant cases with comparable accuracy. In conclusion, all pSUV, aSUV, TBR51, and TBRarea are useful metabolic semi-quantitative indices with good accuracy for the differentiation of benign from malignant soft-tissue lesions.
Fibrosarcoma ; Humans ; Positron-Emission Tomography ; Sensitivity and Specificity

Nose is the most prominent of part of the face and prone to traumas. Therefore posttraumatic deformities are easily seen and play a major effect on the personal impression. Result of clinical analysis of nasal bone fracture that gives general understands and advices of diagnosis and treatment of nasal bone fracture is presented with reports discussed. The author has performed radiologic evaluation, clinical study and statistical analysis in 1488 cases of nasal bone fracture treated in Department of Plastic and Reconstructive Surgery, Inje University Sanggye Paik hospital, from March, 1992 to February, 2002 Most of operation were performed on 5th-10th posttraumatic days(80.7%), and 1040 cases were treated with closed reduction using C-arm. We could obtain satisfactory results using C-arm. In satisfaction rate, 1296 cases(87%) had satisfactory results. The rate of dissatisfaction was high in the patients performed operation after 11th posttraumatic days and who had septal fracture. The author used C-arm during closed reduction of nasal bone fracture and verified the outcomes intraoperatively and were able to get more accurate reduction. With this method, we could obtain satisfactory results cosmetically and functionally. We should follow-up for longer time and we think that further research will be needed in treatment of nasal bone fracture
Congenital Abnormalities ; Diagnosis ; Follow-Up Studies ; Humans ; Nasal Bone* ; Nose ; Plastics ; Retrospective Studies

Double eyelid operation is one of the most common aesthetic surgical procedure performed in Korea. In correlation with the cultural background and social changes, most patients prefer a nonincision method rather than an incision method at the present. Forty-two consecutive patients were operated on for creation of double eyelids, with the subconjunctival buried suture method through conjunctival approach, from June of 1999 to September of 2000. The choice of procedure was based on the age of the patient and the amount of subcutaneous fat and redundant skin. This method was especially advisable if the young patient wants not to leave any visible scar and rapid recovery. The follow-up period ranged from two months to one year. Of forty-two patients undergoing this procedure, three patients(7.1%) required reoperation because of asymmetry, disappearance of fold, and irrtation respectively. This method is similar to various ordinary nonincisional methods previously described except for subconjunctival buried suture. But authors could obtain better cosmetic result with the advantage of shorter operation time, less morbidity, no scarring, and natural look earlier in the appropriate candidates.
Cicatrix ; Eyelids* ; Follow-Up Studies ; Humans ; Korea ; Reoperation ; Skin ; Social Change ; Subcutaneous Fat ; Sutures*

Success of skin grafts depends on sufficient immobilization and early intervention for hematoma, seroma, or infection. To stabilize and cover skin grafts with a tie-over technique was used with translucent silicone gel sheet on flat surface. Skin defect was resurfaced with skin grafts. A sterile silicone gel sheet was placed over the skin graft. Gel was fixed to the wound edges with skin sutures. Skin graft healed without any complications. Using silicone gel sheet in skin graft on flat surface is an effective method for stabilization, which also allows direct visualization of the graft designed to inspect hematoma-like complications.
Bandages* ; Early Intervention (Education) ; Hematoma ; Immobilization ; Seroma ; Silicone Gels* ; Skin* ; Sutures ; Transplants* ; Wounds and Injuries

No abstract available.
Aging* ; Glucose* ; Metabolism*

PURPOSE: The purpose of this study was to assess the diagnostic accuracy of various quantitation methods using F-18-fluorodeoxyglucose (FDG) in patients with malignant or benign lung lesion. MATERIALS AND METHODS: 22 patients (13 malignant including 5 bronchoalverolar cell cancer; 9 benign lesions including 1 hamartoma and 8 active inflammation) were studied after overnight fasting. We performed dynamic PET imaging for 56 min after injection of 370 MBq (10 mCi) of FDG. Standardized uptake values normalized to patients body weight and plasma glucose concentration (SUVglu) were calculated. The uptake rate constant of FDG and glucose metabolic rate were quantified using Patlak graphical analysis (Kpat and Mrpat), three compartment-five parameter model (K5p, MR5p), and six parameter model taking into account heterogeneity of tumor tissue (K6p, MR6p), Areas under receiver operating charac-teristic curves (ROC) were calculated for each method. RESULTS: There was no significant difference of rate constant or glucose metabolic rate measured by various quantitation methods between malignant and benign lesions. The area under ROC curve were 0.73 for SUVglu, 0.66 for Kpat, 0.77 for Mrpat, 0.71 for KSp, 0.73 for MRSp, 0.70 for K6p, and 0.78 for MR6p, No significant difference of area under the ROC curve between these rnethods v;as observed except the area between Kpat vs. Mrpat (p<0.05). CONCLUSION: Quantitative methods did not improve diagnostic accuracy in comparison with nonkinetic methods. However, the clinical utility of these methods needs to be evaluated further in patients with low pretest likelihood of active inflammation or bronchoalveolar cell carcinoma.
Blood Glucose ; Body Weight ; Fasting ; Glucose ; Hamartoma ; Humans ; Inflammation ; Lung Neoplasms ; Lung* ; Population Characteristics ; ROC Curve

Regional myocardial blood flow (rMBF) can be noninvasively quantified using N-13 ammonia and dynamic positron emission tomography (PET). The quantitative accuracy of the rMBF values, however, is affected by the distortion of myocardial PET images caused by finite PET image resolution and cardiac motion. Although different methods have been developed to correct the distortion typically classified as partial volume effect and spillover, the methods are too complex to employ in a routine clinical environment. We have developed a refined method incorporating a geometric model of the volume representation of a region-of-interest (ROI) into the two- compartment N-13 ammonia model. In the refined model, partial volume effect and spillover are conveniently corrected by an additional parameter in the mathematical model. To examine the accuracy of this approach, studies were performed in 9 coronary artery disease patients. Dynamic transaxial images (16 frames) were acquired with a GE AdvanceTM PET scanner simultaneous with intravenous injection of 20 mCi N-13 ammonia. rMBF was examined at rest and during pharmacologically (dipyridamole) induced coronary hyperemia. Three sectorial myocardium (septum, anterior wall and lateral wall) and blood pool time-activity curves were generated using dynamic images from manually drawn ROIs. The accuracy of rMBF values estimated by the refined method was examined by comparing to the values estimated using the conventional two-compartment model without partial volume effect correction. rMBF values obtained by the refined method linearly correlated with rMBF values obtained by the conventional method (108 myocardial segments, correlation coefficient (r)=0.88). Additionally, underestimated rMBF values by the conventional method due to partial volume effect were corrected by theoretically predicted amount in the refined method (slope(m)=1.57). Spillover fraction estimated by the two methods agreed well (r=1.00, m=0.98). In conclusion, accurate rMBF values can be efficiently quantified by t.
Ammonia* ; Coronary Artery Disease ; Humans ; Hyperemia ; Injections, Intravenous ; Models, Theoretical ; Myocardium ; Positron-Emission Tomography