Ischemia and reperfusion of skeletal muscle occurs in acute vascular occlusion and revascularization, in elective vascular surgery, in upper and lower extremity surgery by means of a tourniquet, and in free transplantation of muscle containing cutaneous flaps. During revascularization of skeletal muscle after ischemia, lipid mediators, mainly eicosanoids are released that may have a role in the pathogenesis of reperfusion injury. The exact role of eicosanoids in the imposed ischemia-reperfusion induced functional deficits in skeletal muscle is still unknown, we compared tissue edema and the changes of eicosanoids and the effects of cyclooxygenase inhibitor indomethacin in the rat right hindlimb by application of tourniquet ischemia-reperfusionn injury. After 4-hours of ischemia, reperfusion was established 4 hours by releasing tourniquet. Experimental groups comparised ischemia-reperfused animals pretreated with indomethacin 20 mg/kg. The control animals received normal saline, 4 hours of ischemia without reperfusion. To assess tissue edema, wet/dry weight ratios were determined and the concentrations of prostaglandins and thromboxane were measured by the high performance liquid chromatography with UV detector at 195 nm. Ischemia itself did not result in muscle edema and did not increase the release of cyclooxygenase metabolites, but muscle edema(52%, p<0.01), and the relase of 6-keto-PGFalpha(151%, p<0.01), thromboxane B2(98%, p<0.05), and PGE2(127%, p<0.01) were significantly increased by reperfusion. Indomethacin treatment ameliorated limb edema(35%, p<0.05 versus ischemis-reperfusion control) and decreased 6-keto-PGF1alpha(65%, p<0.05) releases. These results support view that cyclooxygenase products may play significant roles in the formation of ischemic muscle edema and suggest that nonsteroidal antiinflammatory agents and eicosanoids antagonists might be beneficial to the management of acute limb ischemia-reperfusion injury.
Animals ; Anti-Inflammatory Agents, Non-Steroidal ; Chromatography, Liquid ; Edema* ; Eicosanoids* ; Extremities ; Hindlimb ; Indomethacin ; Ischemia* ; Lower Extremity ; Muscle, Skeletal* ; Prostaglandin-Endoperoxide Synthases ; Prostaglandins ; Rats* ; Reperfusion Injury* ; Reperfusion* ; Tourniquets

No abstract available.
Gonadal Dysgenesis, Mixed*

During the microsurgery or during the postoperative period, the occurrence of the vascular spasm increases the failure rate of microvascular anastomosis,and in cases of trauma, the thrombogenic possibility is increased by the endothelial damage. The author thought that the vascular freezing of crushed vessels could improve the patency rate of microvascular anastomosis. Vascular freezing destroys most of the cells in the intima and media. There by causing degeneration of adrenergic fibers. Even though regeneration occurs after 2-3 weeks, regeneration in the smooth muscle layer is still incomplete. So vascular freezing has beneficial effects on relief of vasospasm. Fifteen Sprague-Dawley rats weighing approximately 300 g each were inflicted with crushing injury on the femoral arteries of the right side and the crushing injury with vascular freezing on the femoral arteries of the left side. The gross and histologic findings, as well as the patency rates, were observed at the postoperative 2nd, 10th, and 30th day,and the results were compared between the crushed and crush-freezing groups. The left side (crush-freezing group) showed less vasospasm and less thrombogenesis than the right side (crushed group). There were no significant differences in the patency rate between the crushed group and crush-freezing group. Vascular freezing is suggested to be effective on a potentially thrombogenic, endothelial damaged vessel as a prophylactic treatment method against vasospasm. Clinical application of vascular freezing awaits further experimentation.
Adrenergic Fibers ; Endothelium* ; Femoral Artery ; Freezing* ; Microsurgery ; Muscle, Smooth ; Postoperative Period ; Rats, Sprague-Dawley ; Regeneration ; Spasm

The concentrations of Sodium and Potassium were measured by flame photometer in the human for milk obtained at clostral(1st 5days postpartum), early transitional (2nd 5days postpartum), late transitional (11th to 29th day postpartum) and mature milk period (1to 15 months postportum) from 92 healthy nursing mothers who delivered at term. The results were summerized as follows: 1) The concentrations of Na and K at different stages of lactation showed the highest value in colostrum, tended to decrease therafter and maintained the lowest and nearly constant value in mature milk(.01 2) Average Na and K concentrations(Mean+/-S.D., mEq/L) at different stages of lactation were colostrum : 20.8+/-4.47, 15.9+/-3.17, early transitional milk : 15.3+/-4.73, 14.2+/-3.03, late transitional milk : 11.7+/-4.28, 12.8+/-3.40, and mature milk : 8.1+/-3.59, 11.2+/-2.88 respectively. 3) The content of Na and K among primi-and multiparae showed the highest value in colostrum, also tended to decrease therafter, and maintained the lowest value in mature milk. No statistical significance was found between the concentrations of Na and K at different stages of lactation between primi-and multiparae(p>.05). 4) Definite inverse relationship could be established between Na and K concentrations and days of lactation(Na:r=-0.6, p<.001, K:r=0.4, p<.001). 5) The Mean Na and K concentration in late transitional milk showed the most consistent percentage decrease that in colostrum.
Colostrum ; Female ; Humans* ; Lactation* ; Milk ; Milk, Human* ; Mothers ; Nursing ; Potassium ; Sodium

No Abstract Available.
Female ; Mammaplasty*

The retraction of anterior teeth is one of the fundamental methods in orthodontic treatment and a proper position and angulation of anterior teeth after the retraction are very important for esthetics, stability, and function of teeth. In this research we analyzed, by Finite Element Method, the stress distribution on the periodontal ligament according to the variation of force and moment applied on the crown and predict the pattern of movement of maxillary central incisor. At the same time, the amount of force and moment caused by activation of the loop which was used for retraction of maxillary central incisor was analyzed by Finite Element Method. We observed the following results: 1) We could control the stress distribution on the periodontal ligament by proper moment/force ratio on maxillary right central incisor and predict the pattern of movement of maxillary right central incisor. 2) The amount of stress on the periodontal ligament as well as the moment/force ratio demanded by each pattern of movement increased as the destruction of alveolar bone was worse. 3) The moment/force ratio demanded by each pattern of movement decreased as the angle between the maxillary central incisor and occlusal plane decreased. 4) The force with the open loop was shown to be large compared to that with the closed loop. Also, the force with the helix decreased by 30% compared to that without the helix. 5) Under the same conditions we observed a larger moment/force ratio when the open loop and/or the helix were used.
Crowns ; Dental Occlusion ; Esthetics ; Incisor* ; Periodontal Ligament ; Tooth

The purpose of this case report is to evaluate the visual outcome of an intravitreal triamcinolone acetonide injection (IVTA) as a treatment for a patient with acute nonarteritic anterior ischemic optic neuropathy (NAION). A 65-year-old male patient with severe visual loss due to acute NAION was treated with 4 mg/0.1mL IVTA. Fundus examination and measurements of the patient's best-corrected visual acuity and visual field were performed before and after the injection at 2 weeks, 1 month, 3 months, and 6 months. The best-corrected visual acuity changed from 0.05 before the injection to 0.16 at 2 weeks, 0.3 at 1 month, and 0.4 at 3 months and at the final visit. Optic disc swelling had markedly decreased at 1 week postoperatively and disappeared at 2 weeks after the injection. The clinical course of this patient suggests that an IVTA may be effective in increasing visual acuity following an acute NAION. A large randomized controlled trial is needed to assess the efficacy of IVTA as a treatment for NAION.
Acute Disease ; Aged ; Diagnosis, Differential ; Fluorescein Angiography ; Follow-Up Studies ; Fundus Oculi ; Glucocorticoids/*administration & dosage ; Humans ; Injections ; Male ; Ophthalmic Solutions ; Optic Neuropathy, Ischemic/*drug therapy/pathology/physiopathology ; Triamcinolone Acetonide/*administration & dosage ; Visual Acuity ; Visual Fields ; Vitreous Body

PURPOSE: To report the results of femtosecond laser-assisted 'mushroom-shaped wound-configurized keratoplasty' in 6 patients based on the results of experimental models in rabbits' and enucleated porcine eyes. METHODS: Mushroom-shaped donor corneal grafts were designed and transplanted in 3 rabbit eyes and 10 enucleated porcine eyes. The histologic findings were observed and wound burst pressure compared between penetrating keratoplasty (PKP) and mushroom-shaped keratoplasty. The 'mushroom-shaped wound-configurized keratoplasty' was subsequently performed in 6 eyes of 6 patients. RESULTS: In all eyes of the rabbits, histologic findings showed stable wound structure. In the porcine models, mushroom-shaped keratoplasty showed a better resistance to IOP than PKP after complete suture. Patients who underwent the surgery showed an improvement of over 2 lines in Snellen visual acuity after the operation. The mean follow-up period was approximately 11 months. Complete suture removal was performed within 6 months and accurate and stable wound structure was identified. CONCLUSIONS: Wound-configurized keratoplasty with femtosecond laser and mechanical dissection' has shown several advantages in the lamellar structure of the wound. Stable wound structure, less astigmatism, rapid suture removal and visual rehabilitation was achieved.
Astigmatism ; Corneal Transplantation ; Eye ; Follow-Up Studies ; Humans ; Keratoplasty, Penetrating ; Models, Theoretical ; Rabbits ; Sutures ; Tissue Donors ; Transplants ; Visual Acuity

Infantile digital fibromatosis is a rare benign tumor on the fingers and toes of infants and childhood which is characterized by fibroblastic proliferation. Usually the lesions occur singly or severally on the dorsal or lateral aspects of the distal phalanges of the toes and fingers. The thumb and great toe are usually spared. These asymptomatic, firm, red, smooth nodules, some lcm diameter, occur during the first year of life. Forty-seven percent occur in the first month of life. This disease can occur after trauma. The lesions do not metastasize. Occasionally, spontaneous regression has been reported. After excision, recurrence can be possible. A 2 years old female infant had three large bean sized erythematous masses on the left 2,3,4th fingers. The erythematous aacule was developed at 6 months old and grew slowly. We could find inclusion body stained bright red with Massons trichrome and purple with PTAH in cytoplasm of fibroblast. The patient was treated with a simple excision followed by a skin graft. During 5 rnonths after operation, recurrence was not occurred.
Child, Preschool ; Cytoplasm ; Female ; Fibroblasts ; Fibroma* ; Fingers ; Humans ; Inclusion Bodies ; Infant ; Recurrence ; Skin* ; Thumb ; Toes ; Transplants*

BACKGROUND: When we make treatment plan of class III malocclusion children, it is difficult to determine whether we treat it with orthognathic surgery or without orthognathic surgery. To determine that, we must consider many factors, such as cephalometric analysis, growth pattern, family history, and skeletal age. A Harvold cephalometric analysis is useful in determining the amount of discrepancy by comparing the maxillary unit length with mandibular unit length. We tried this study to help the decision of treatment planning in class III malocclusion children by comparison in class III malocclusion and normal occlusion children using a Harvold analysis. MATERIALS AND METHODS: The materials for this study consisted of 20 class III malocclusion children. Cephalometric tracing and measurements were performed by one investigator. The control group consisted of 18 normal occlusion children and lateral cephalograms were obtained from 8.5 to 14.5 years old children biannually. The relationships between class III malocclusion group and normal occlusion group were evaluated statistically. RESULTS: The lower anterior facial heights between two groups were not significantly different, although the lower anterior facial heights of class III malocclusion group was higher than those of normal occlusion group in all age groups. The Maxillary-mandibular unit length differences of class III malocclusion group were significantly higher than those of normal occlusion group(p < 0.05). CONCLUSION: A Harvold analysis was useful to make treatment planning for class III malocclusion children.
Child* ; Humans ; Malocclusion* ; Orthognathic Surgery ; Research Personnel