Adult ; Connective Tissue ; Extremities ; Head ; Histiocytoma, Malignant Fibrous ; Humans ; Maxilla ; Neck ; Radiotherapy ; Sarcoma

Presently, Erbium:YAG laser, which is known as laser for osteotomy, is considered to have good resection effects and to bring about minimum thermal damage. Since studies on this has never been done within the country and left as a field still unexplored, I expect to use this study as experimental data on future use of laser on hard tissue. In this report, both surgical bur(diameter 0.5mm carbide roun bur) and Erbium:YAG laser(100mJ/pulse, 10pulse/sec) was used each on the femur of white mouse and after the same amount of osteotomy, the effect of bone healing on the light microscope was observed and comparative study was made histology. The results are as follows : 1. In the first group (1st day, 3rd day), the osteotomic bone portion of the experimental group was irregular with bone resorption and showed more blood cell infiltration, compared with the control group. 2. At 1 week, bone matrix and immature bone was formed in the peripheral and center of the resection area in the control group. But inthe experimental group, more bone formation was initiated in the peripheral than in the center and showed more infiltration of blood cells and inflammatory cells. 3. At 2 week, bone matrix became mature to have similar density with compact bone and showed new formed vessels in the control group. But in the experimental group, bone formation with decreased density was initiated and new formed vessels together with mature bones was observed. 4. At 3 week, mature bone with equal density and regular trabecular pattern was observed in the control group. But in the experimental group, the continuity between the new bone and old bone was rather loose with decreased maturity, but on the other hand, had even bone formation pattern. 5. At 4 week, both the control and experimental group showed perfect bone healing features. From the results above, I can observe that in osteotomy with Erbium:YAG laser bone healing is rather delayed in each step but if, effective percentage of resection could obtained it would be valuable to substitute mechnical bur or saw and bring about much progress and development in the area of oral and maxillofacial surgery. For this, more studies on bone resection and biomechanical strength of bone tissue after bone healing should be done on various animals.
Animals ; Blood Cells ; Bone and Bones ; Bone Matrix ; Bone Resorption ; Erbium* ; Femur ; Hand ; Lasers, Solid-State* ; Mice ; Osteogenesis ; Osteotomy* ; Surgery, Oral

This is a case report and review of literature of a rare mixed odontogenic tumor, ameloblastic fibro-odontoma in the posterior area of the mandible. The ameloblastic fibro-odontoma which was developed by hyperplasia of dental epithelium and mesenchymal tissue. This tumor was classified from ameloblastic odontoma by Hooker, in 1967. At first and characterized by mixed appearance of odontoma and ameloblastic fibro-odontoma, But, on the point of pathologic feature, there are many controversial opinions among scholars up to the present. The patients of this case report was refereed to our department via the pedodontic department for the treatment of hard mass on the premolar area of the left mandible. And then, on the clinical and radiographic examination at first visit, we had tentative diagnosis that the lesion was benign mixed odontogenic tumor of defined mass margin that was amelblastic fibro-odontoma. The tumor mass was removed by surgical enucleation and curettage and extracted left mandibular second premolar which was impacted on the lesion. And the removed tumor mass was confirmed to ameloblastic fibro-odontoma on the post-operative biopsy. The patients has well done follow-up check postoperatively and shown no sign of recurrence up to the present.
Ameloblasts* ; Bicuspid ; Biopsy ; Curettage ; Diagnosis ; Epithelium ; Follow-Up Studies ; Humans ; Hyperplasia ; Mandible* ; Odontogenic Tumors ; Odontoma ; Recurrence

Maxillofacial infection often place the oral and maxillofacial surgeon in situations where timely decisions have to be made. These decisions can be lifesaving. Odontogenic infection are frequently encountered in the practice of oral and maxillofacial surgery. These infections often repond to surgical and antimicrobial management. Otheriwise odontogenic infections have the potential to spread via the fasical spaces in the head and neck region. They can compromise vital structures in this region or involve distant structures. The classic signs of maxillofacial infections include pain, swelling, fever, dysphagia, and dehydration. The goals of management should be to correct these conditions. We have undertaken clinical studies on infections in the oral and maxillofacial regions (facial space) by analyzing hospitalized patients in the Dept. of Oral and Maxillofacial Surgery, Kyung Hee University Hospital past 5 years from 1991. To 1995. And bacterial cultures and antibiotics sensitivity test were performed and the comparative analysis of the antibiotics was done. The results were as follows: 1. The most frequent cause of oral and maxillofacial infection was odontogenic 68% and in 23% patients with signs and symptom aggrevated after teeth extraction. 2. The most common fascial spaces involved was buccal space 36.1%, followed by submandibular space 12.3% and 3 cases were Ludwig's angina. 3. Antibiotics were administrated in all cases and surgical incision and drainage was performed in 88.6%. 4. The most causative organisms isolated from the pus cultures were streptococci group 51.1%.
Anti-Bacterial Agents ; Deglutition Disorders ; Dehydration ; Drainage ; Fever ; Head ; Humans ; Ludwig's Angina ; Neck ; Suppuration ; Surgery, Oral ; Tooth

Nd:YAG laser is well absorbed to water, melanin, hemoglobin and thus, Nd:YAG laser may be used for bleeding control and extraction site sterilization where is easily contaminated by saliva and blood. Additionaly, Nd:YAG laser have analgesic effect by elevation of pain threshold. On the basis of Nd:YAG laser effects, we applied the Nd:YAG laser on extraction socket of 50 patients who visited to our department for lower third molar extraction and evaluated the effects of Nd:YAG laser on the bleeding control, pain relief, swelling reduction after tooth extraction. For the objective assesment on Nd:YAG laser effects, we made up the other 50 patients(control group) who were treated by conventional extraction method and compare the subjective and objective symptoms(pain relief, swelling and oozing time) between each group. The results were as follows: 1. The Nd:YAG laser was effective to relief of postextraction pain and most effective to 2 hours after extraction when local anesthesia disappears. 2. The Nd:YAG laser application was non-effective to reducing the facial swelling after extraction. 3. The Nd:YAG was effective to decrease the oozing time after extraction and the average time was 4 hours.
Anesthesia, Local ; Equidae ; Hemorrhage ; Humans ; Lasers, Solid-State* ; Melanins ; Molar, Third ; Pain Threshold ; Saliva ; Sterilization ; Tooth Extraction

PURPOSE: We wanted to assess the usefulness of MRCP after intravenous morphine administration in the evaluation of the hepatopancreatic pancreatico-biliary ductal system. MATERIALS AND METHODS: We studied 15 patients who were suspected of having disease of hepatopancreatic ductal system and they did not have any obstructive lesion on ultrasonography and/or CT. MRCP was acquired before and after morphine administration (0.04 mg/kg, intravenously). Three radiologists scored the quality of the images of the anatomic structures in the hepatopancreatic ductal system. We directly compared the quality of the images obtained with using the two methods and the improvement of the artifacts by pulsatile vascular compression. RESULTS: The MRCP images obtained after intravenous morphine administration were better than those obtained before morphine administration for visualizing the hepatopancreatic ductal system. On direct comparison, the MRCP images obtained after morphine administration were better in 12 cases, equivocal in two cases, and the images before morphine administration were better in only one case. In three patients, MRCP before morphine injection showed signal loss at the duct across the pulsatile hepatic artery. In two of three patients, MRCP after morphine injection showed no signal loss in this ductal area. CONCLUSION: MRCP after intravenous morphine administration enables physicians to see the hepatopancreatic ductal system significantly better and the artifacts caused by pulsation of the hepatic artery can be avoided.
Artifacts ; Hepatic Artery ; Humans ; Morphine* ; Ultrasonography

This is a retrospective study on condylar fracture of mandible. The stucy based on a series of 112 patients who had treated for the fractures of mandibular condyle on Kyunghee Dental Hospital from January, 1989 to August 1997. We studied the age and sex distributions, causes of fractures, location of fractures and so on. The results as follow : 1. The ratio of male : female was 4:1, and the highest frequency of condylar fractures was registered among patients aged to 21 to 30 years. 2. The most common cause of condylar fractures was fall-down(47.7%), followed in incidence by direct-blow(27.9%) and traffic accidents(20.7%). 3. Subcondylar fracture had highest incidence(50%), and followed by condyle head(27.4%) and condylar neck(22.6%). 4. 9.7% of condylar fractures had occurred bilaterally and in cases of bilateral condylar fractures, condylar head fractures(58.33%) was hightest incidence. 5. Mandibular symphysis was most commonly involved in condylar fracture(63.4%), and 27.7% of condylar fractures had not any other mandibular fractures.
Female ; Head ; Humans ; Incidence ; Male ; Mandible* ; Mandibular Condyle ; Mandibular Fractures ; Retrospective Studies ; Sex Distribution ; Statistics as Topic*

Ankylosis ; Arthroplasty ; Burns ; Classification ; Congenital Abnormalities ; Facial Asymmetry ; Jaw ; Malocclusion ; Mandible ; Mouth ; Temporomandibular Joint

Churg-Strauss syndrome (CSS) is a rare systemic vasculitis. It is characterized by peripheral eosinophilia, asthma, neuropathy, skin manifestation, and less frequently gastrointestinal tract symptoms. Here we report a case of CSS which is initially manifested as acute acalculous cholecystitis. A 67-year-old asthmatic woman visited Emergency Room because of acute abdominal pain. Computed tomography showed acalculous cholecystitis and laparoscopic cholecystectomy was done. Pathology of gallbladder showed marked eosinophilic infiltration with necrotizing vasculitis and granuloma. On the basis of asthma, sinusitis, lung infiltration, combined peripheral eosinophilia and neuropathy, the patient was diagnosed as CSS. To our knowledge, this is the first case of pathologically proven eosinophilic cholecystitis in Korea.
Abdominal Pain ; Acalculous Cholecystitis* ; Aged ; Asthma ; Cholecystectomy, Laparoscopic ; Cholecystitis ; Churg-Strauss Syndrome* ; Emergencies ; Eosinophilia ; Eosinophils ; Female ; Gallbladder ; Gastrointestinal Tract ; Granuloma ; Humans ; Korea ; Lung ; Pathology ; Sinusitis ; Skin Manifestations ; Systemic Vasculitis ; Vasculitis

BACKGROUND AND OBJECTIVES: Metabolic syndrome (MetS) increases the risk of heart failure (HF). The purpose of this study was to identify the prevalence of MetS in patients with HF and determine the syndrome's association with HF in clinical and laboratory parameters. SUBJECTS AND METHODS: A total of 3200 HF patients (67.6+/-14.5 years) enrolled in a nationwide prospective Korea HF Registry between Jan. 2005 and Oct. 2009. Patients were divided into two groups according to the presence or absence of MetS at admission: group I (presence, n=1141) and group II (absence, n=2059). RESULTS: The prevalence of MetS was 35.7% across all subjects and was higher in females (56.0%). The levels of white blood cells, platelets, creatinine, glucose, and cholesterol were significantly higher in group I than in group II. Left ventricular dimension and volume was smaller and ejection fraction was higher in group I than in group II. An ischemic cause of HF was more frequent in group I. The rates of valvular and idiopathic cause were lower in group I than in group II. The rate of mortality was lower in group I than in group II (4.9% vs. 8.3%, p<0.001). CONCLUSION: Despite the increased cardiovascular risks in MetS, MetS was found to be associated with decreased mortality in HF.
Blood Platelets ; Cholesterol ; Creatinine ; Female ; Glucose ; Heart ; Heart Failure ; Humans ; Korea ; Leukocytes ; Prevalence ; Prospective Studies