No abstract available.
Korea*

Access to the craniofacial skeleton and skull base requires osteotomies. An adequate exposure of neoplasms occupying the skull base and the oral cavity and oropharynx, especially retromolar trigone, is very important for precise tumor ablation. The demonstration by Tessier of the capacity for large segments of bone to survive removal and replacement has enabled skull base tumor surgery to grow into a subspeciality. Through the refined craniofacial exposure osteotomies, the surgery is safer, the operation shorter, and the result better both oncologically and reconstructively. We experienced 24 cases of exposure osteotomies consisting of 12 cases transzygomatic approaches, 1 case tranglabellar osteotomy, 1 case lateral transmaxillary approach, 1 case Le Fort II & midline splitting, and 9 cases mandibulotomy. There was no significant complication except a local wound infection in transzygomatic approach and one case of minimal malocclusion after parasymphyseal mandibulotomy. The orthotopic bone graft and the rigid fixation enables the postoperative morbidity to decrease. It seems that the previously inaccessible craniofacial tumors can be treated through the various exposure osteotomies.
Malocclusion ; Mouth ; Oropharynx ; Osteotomy* ; Skeleton ; Skull Base ; Transplants ; Wound Infection

No abstract available.
Gait* ; Humans ; Spinal Cord Diseases*

Since the first report by Berberich and Hirsch in 1923, conventional angiography had been playing essential roles in diagnosis and treatment in the field of Orthopedic Surgery. Angiography is still the most definitive method for evaluating arterial disease, and is also an invaluable aid in the diagnosis of certain abnormalities which characteristically alter the normal vascular pattern. But the clinical use of conventional angiography as a routine diagnostic study has been limited by the risk associated with arterial catheterization cost, and poor patient acceptance. With improvement of radionuclide angiography and development of the methods for the identification and amplification of signals from small quantities of intravascular administered iodinated contrast agent and their combination with image subtraction (so called digital subtraction angiography, DSA), we have partially substituted the DSA and Radionuclide angiography for conventional angiography in diagnosis and post-operative evaluation of orthopedic patients. We have analyzed and compared the 197 cases who had taken conventional angiography from August, 1981 to July, 1985, and 16 cases who had taken radionuclide angiography from January, 1983 to July, 1985, and 21 cases who had taken DSA from October, 1983 to July, 1985 in Department of Orthopedic Surgery, Seoul National University Hospital. The results were as follow: 1. Conventional angiography is the most reliable and most widely used method in diagnosis of peri pheral arterial disease and evaluating the distribution of peripheral circulation of patient who need arterial reconstruction. But the clinical use of the angiography has been limited by the risk of complications. 2. DSA is simple, relatively non-invasive and can be done in out-patient basis. DSA is particulary useful and can replace the conventional angiography in post-operative assessment of peripheral vascular reconstruction, in the assessment of blunt and penetrating peripheral arterial trauma, and in the evaluation of peripheral aneurysm and vascular malformation. 3. Radionuclide angiography is also simple, and has no morbidity and useful in the patients who may be allergic to the contrast medium. Radionuclide angiography is useful in the evaluation of obstruction of major artery, deep vein thrombosis, and in repeated post-operative evaluation of arterial reconstruction.
Aneurysm ; Angiography ; Angiography, Digital Subtraction ; Arteries ; Catheterization ; Catheters ; Diagnosis ; Extremities ; Humans ; Methods ; Orthopedics ; Outpatients ; Radionuclide Angiography ; Seoul ; Vascular Malformations ; Venous Thrombosis

Complications of mandibular angle contouring may include damage to the inferior alveolar nerve. This study was undertaken to quantify the path of the inferior alveolar nerve in the normal human mandible and in the mandibles of patients presenting for cosmetic reduction of the mandibular angles. The study was based upon the panorama radiography of 20 normal population (ten men, ten women) and 20 patients (ten men, ten women) complaining of square face. Using panorama radiographs and paper tracing, the distance from the "A" point (Fig. 1) to the inferior alveolar nerve was recorded within its mandibular osseous canal in the mandibular angle. The nerve was identifiable in each ramus. The average distance between A point and the other points along the osseous canal is 21.48mm. Therefore together with an additional margin of several millimeters, it is important to maintain a safe distance of at least an inch (25mm) between the saw and the anterior border of the ramus. From our clinical experiences, we are suggesting that this "1 inch maneuver" to be very helpful in avoiding injury to the inferior alveolar nerve, especially for the novice surgeon.
Humans ; Male ; Mandible ; Mandibular Nerve* ; Radiography ; Radiography, Panoramic

No abstract available.
Free Tissue Flaps* ; Mouth* ; Oropharynx* ; Rectus Abdominis*

No abstract available.

No abstract available.
Epidermis* ; Skin Diseases* ; Skin*

OBJECTIVE: To assess the effect of fentanyl and midazolam on in vitro fertilization rate and early embryo development in a mouse IVF model. METHODS: Mouse oocytes were exposed in vitro to fentanyl at a concentration of 0(control), 50, 250, 500, 1000, 5000 pg/ml, and midazolam, 0(control), 2.5, 12.5, 25, 50, 250 ng/ml for 30 minutes, washed and inseminated. Thereafter fertilization was assessed. And subsequent in vitro development to the blastocyst stage was monitored daily. RESULTS: Where fertilization occurred, subsequent embryo cleavage and development up to the blastocyst stage was affected significantly by the presence of fentanyl and midazolam solution in the medium(i.e., 14% to 31%, 10% to 35%), in comparison with control group( 60%, 62%). CONCLUSION: It can be concluded from these experiments that even a brief exposure of cumulus enclosed oocytes to a low concentration of fentanyl, midazolam is deleterious to subsequent cleavage.
Anesthetics ; Animals ; Blastocyst ; Embryonic Development ; Embryonic Structures* ; Female ; Fentanyl* ; Fertilization ; Fertilization in Vitro* ; Mice* ; Midazolam* ; Oocytes ; Pregnancy

Three combinations of cloths were evaluated for the protective effects of different kinds of clothings in cold environments. Table 1 shows tile components of tile three models of clothings. A prototype was made by putting a sheet of vinyl at the middle layer of raw cotton in a fabric-quilt cloths. A glove mannequin was covered by each of these cloths. The globes contained 1,000 cc of hot water about 40 degrees C. Tele-thermisters were fixed in order to check the temperature of cloths space and water temperature for evaluation of caloric-loss and climate of clothings. Results are summarized as follows : 1) Without wind, there is no significant difference of air temperatures between ski-parka and quilt wear clothing. 2) The prototype with vinyl sheet best protects against wind, the next is the ski-parka. Quilt-wear protects the least. 3) It is well-known that a working-clothing needs not have any separate liners nor outers. 4) For innermost layer of a clothing preventing cold, a cotton-fabrics is recommended and a water-proof cloths for outer layer. 5) Heat-loss was calculated from the cooling degrees of water. Calorie-loss was 910ca1/m2/hr. when bared, but with the prototype of vinyl sheets the calorie-loss was 350cal/m2/hr. (38.5% of bared). Quilt-wear and ski-parka were 380(41.8%) and 440 cal/m2/hr. (48.4%) respectively.
Climate ; Clothing* ; Manikins ; Water ; Wind*