Tooth movement by orthodontic force is based upon alveolar bone resorption at compression site and bone formation at tension site of tooth. The function of cyclic AMP is to participate not only in initial action of bone cells by mechanical forces but also in the continuous cellular response leading, to bone remodeling. This experiment was performed to clarify the role of cyclic AMP in bone remodeling by mechanical forces. The orthodontic forces of about 80 gm and 100 gm were applied to the right canines of maxillary and mandibular bone, respectively, in cats, treated for periods of time ranging from one hour to 28 days. Alveolar bones were obtained from compression and tension sites . surrounding tipping maxillary and mandibular canines as well as from contralateral control sites. The samples were extracted, boiled and homogenized, and the supernatants were assayed for cyclic AMP by a radioimmunoassay mothod. The results were as follows: 1. The orthodontic movement of canines was increased to the end of experimental period and the action of orthodontic forces on tooth movement was more effective in maxillary canine. 2. The cyclic AMP levels of alveolar bones in compression and tension sites initially decreased, then increased and remained elevated to the end of experiment. The differences of the cyclic AMP levels between treated sites and non-treated sites were gradually increased. 3. The cyclic AMP levels in treated sites of mandibular alveolar bone was higher than that of maxillary alveolar bone.
Animals ; Bone Remodeling ; Bone Resorption ; Cats ; Cyclic AMP* ; Osteogenesis ; Radioimmunoassay ; Tooth ; Tooth Movement

It had heen emphasized the necessity for upper gastrointestinal endoscopic examinations in patients. Who has had gastrectomy and presents persisting gastrointestinal symptoms. This study was conducted to evaluate endoscopic findings and clinical symptoms in patients following gastrectomy. (continue...)
Gastrectomy* ; Humans

PURPOSE: We reviewed radiological mid-term results of cementless hip replacement using Mallory-Head tapered titanium femoral stem. MATERIALS AND METHODS: Forty six patients, 50 hips were followed for more than 5 years. Mean age was 56 years, and mean follow-up period was 6.8 years. Radiologically changes in alignment, subsidence and wear rate were measured. Radiolucent line, endosteal spot weld and osteolysis were also assessed according to Gruen zones. RESULTS: All stems showed stable fixation, and radiolucent lines were observed in noncoated zones of 13 cases (26%) . Osteolysis was observed around the proximal stem in 16 cases (32%) , but it did not progress distally. CONCLUSION: With minimum follow-up of 5 years, the tapered titanium femoral stem showed good radiological results, however osteolysis needs more long-term follow-up.
Arthroplasty* ; Follow-Up Studies* ; Hip* ; Humans ; Osteolysis ; Titanium

BACKGROUND: The properties of etomidate include hemodynamic stability, minimal respiratory depression, cerebral protection, and rapid recovery. However, its drawbacks include temporary inhibition of steroid synthesis, pain on injection, thrombophlebitis, myoclonus, nausea and vomiting. This study was done to discover the incidence of complications which could be observed during induction and the relationship between these complications and the age, sex and weight of Koreans. METHODS: Induction was done by etomidate 0.3 mg/kg and vecuronium 0.1 mg/kg. Pain on injection and hiccup were checked as present or absent. Myoclonus was checked as absent, mild, or severe. RESULTS: The incidence of pain on injection, hiccup and myoclonus were 4%, 10%, and 40% (mild 28%, severe 12%) respectively. There was no association between pain on injection and hiccup or myoclonus. Hiccup and myoclonus had some association (Gamma 0.774). Logistic regression revealed that there was no association between pain on injection or hiccup, and sex, age or weight. Myoclonus had some association with age and weight. The occurrence of myoclonus could be estimated by the following equation. log[ Fj(x) / { 1 Fj(x) } ] = aj 0.061 age 0.019 weight j = 1, 2 As age or weight increased, the myoclonus was more likely to fall at the low end (i.e., absence). CONCLUSIONS: The incidences of the pain on injection, hiccup and myoclonus were 4%, 10% and 40% respectively. The hiccup and the myoclonus had some positive association. The occurrence of myoclonus decreased as age or weight increased.
Etomidate* ; Hemodynamics ; Hiccup ; Incidence ; Logistic Models ; Myoclonus ; Nausea ; Respiratory Insufficiency ; Thrombophlebitis ; Vecuronium Bromide ; Vomiting

BACKGORUND: in spinal anesthesia, we usually walk over the interspinous space with a repetitive insertion-withdrawal-redirection-advance chain, which is annoying and time consuming, let alone the discomfort of patients. The aim of this study was to offer a guideline for the optimal point and angle of needle insertion performing spinal anesthesia and to strengthen the basis of the practice of spinal anesthesia. METHODS: Twenty men were evaluated for this study. While in a head-to-knee position, a simple X-ray was taken and L2-3, L3-4, and L4-5 interspaces were measured. Two tangential lines were drawn between the upper and lower spinous process and the points where these two lines meet the skin were marked. The perpendicular line from the most prominent point of the spinous process to the skin was checked(S). The distances from S to the cephalic point of the tangential line (D1) and to the caudal point of the tangential line (D2) were measured. Perpendicular lines were drawn on the point where tangential lines meet skin and the angles between perpendicular lines and tangential lines were measured (A1, A2). RESULTS: Mean distance (MD, [D2-D1] / 2) and mean angle (MA, [A1+A2] / 2) were calculated as 3.59+/-0.64cm, 11.9+/-4.75 for L2-3, 3.72+/-0.50 cm, 11.18+/-1.65degree for L3-4, and 3.71+/-0.61cm, 11.03+/-4.95degree for L4-5 (mean+/-SD). CONCLUSiONS: At any lumbar level, we could approach the interspinous space from the insertion point of 3.6-3.7cm caudal from the spinous process and with the angle of the cephalic direction of about 11-12degree optimally. it can be the guideline for the insertion of the needle in spinal anesthesia and we can get some safe margins for insertion from the measured data.
Anesthesia, Spinal ; Humans ; Linear Energy Transfer ; Lumbar Vertebrae ; Male* ; Needles* ; Radiography ; Skin ; Spinal Puncture* ; Young Adult*

Behcets disease is a chronic systemic disease of unknown etiology, which is characterized by the recurrent orogenital ulcers, eye involvement and skin manifestations. In addition to the major symptoms, it includes arthritis, vasculitis, neurologic manifestations and gastrointestinal lesions. We report a case of Behcets disease associated with intestinal ulcers. The patient, a 45-year-old female, who had been treated under the diagnosis of Behcets disease for 4 years, presented with swallowing difficulty, vaginal discharge and persistent right lower abdominal pain. Colonoscopic examination showed multiple ulcers on the ileocecal region which is reported as the most common site of gastrointestinal Behcets disease. Gastrointestinal evaluation can be useful in diagnosis of Behcets disease, especially in a patient with gastrointestinal symptoms.
Abdominal Pain ; Arthritis ; Deglutition ; Diagnosis ; Female ; Humans ; Middle Aged ; Neurologic Manifestations ; Skin Manifestations ; Ulcer* ; Vaginal Discharge ; Vasculitis

BACKGROUND: This study was performed to discover how much needle deflection occurs during spinal or epidural block and how it can be reduced. METHODS: A styrofoam block was used to simulate the paraspinal area of the back. A line was drawn perpendicular to the edge. Using the line as a guide, the needles were advanced through the block. Quincke-type needles of 22 and 25 gauge, pencil-type needles of 22 and 25 gauge or Tuohy needles of 17 and 18 gauge were used. Using a block of 6 cm thick, spinal needle was advanced through the introducer with their apertures facing to the same or opposite direction. The deflection from the perpendicular line was measured in mm intervals. RESULTS: Small-gauged and beveled spinal needles had more deflection depending on the block thickness (P < 0.05). However, the deflection of epidural needles was not consistent. When the bevel of the introducer and spinal needle was facing the same direction, the use of an introducer needle decreased the deflection in 22 and 25 G Quicke, and 25 G Whitacre needles (P < 0.05). When facing each other, the deflection was reduced in all the spinal needles (P < 0.05), and reduced more in the 25 G Quicke needles (P < 0.05). CONCLUSIONS: Considering the estimated depth of the spinal canal, needle type, bevel direction, its gauge and the use of an introducer needle, we can take advantage of the deflection phenomenon to reduce post-dural puncture headache and to increase the success rate of a spinal or epidural block.
Needles* ; Post-Dural Puncture Headache ; Spinal Canal

Stasis dermatitis is one of the important skin manifestations of venous stasis. Therefore, the searching for the cause of venous stasis is importrnt. Two cases of stasis dermatitis with inferior vena caval obstruction are reported and possible etiologic factor is discussed. Case I The patient, 38-year-old carpenter, was admitted at Choong Buk Medical Center in April, 1974 with superficial venous engorgement of the lower extremities which had begun to appear two years after severe blunt trauma to both legs in 1962. 5 years prior to admission, abdomial venous engorgement and abdominal fullness developed and was exaggerated gradually. Since 2 years prior to admission, he has been suffered from the recurrent exudative ulcer on the right lower leg The physical examination revealed mild icteric sclera, hepatomegaly, abdominal distension, tortuous venous engorgement on the abdomen, the lateral chest wall and the lower extremities, and edematous scaly brawny pigmentation of the lower legs. Esphagogram showed no esphageal varices. Inferior vena cavogram showed complete obstruction at the level of upper border of 2nd lumbar vertebra and well developed collateral circulation, Findings of skin biopsy on the right lower leg showed moderate acanthosis, increased pigmentation of bosal cell layer in the epidermis, capillary proliferation, diffuse inflammatory cell infiltration with increased fibrosis and hemosiderin granules in the dermis. Case II The patient. 36-year-old farmer, was admitted at Dept. of Dermatology, St. Mary's Hospital, Catholic Medical College in Sept., 1973.The physical examination revealed hepatomegaly, abdominal distension, superficial venous engorgement on the abdomen, the neck and the lower extrcmities, severe edema and pigmentation of the lower legs, and the multiplc. Exudative ulcers on the left lower leg. Liver scanning showed somewhat general enlargement with some mottlings along the margin and relative prominance of the left lobe. Liver biopsy revealed findings of non specific chrcnic hepatitis. Inferior vena cavogram through the left femoral vein showed complete obstruction at the level between 11th and 12th thoracic vertebrae.His peripheral edema and ascites was much subsided after adequate bed rest and the skin lesion improved with scar formation.
Abdomen ; Adult ; Ascites ; Bed Rest ; Biopsy ; Capillaries ; Cicatrix ; Collateral Circulation ; Dermatitis* ; Dermatology ; Dermis ; Edema ; Epidermis ; Femoral Vein ; Fibrinogen ; Fibrosis ; Hemosiderin ; Hepatitis ; Hepatomegaly ; Humans ; Hyperemia ; Leg ; Liver ; Lower Extremity ; Neck ; Physical Examination ; Pigmentation ; Sclera ; Skin ; Skin Manifestations ; Spine ; Thoracic Wall ; Ulcer ; Varicose Veins

BACKGROUND: Mixed venous oxygen saturation (SO2) monitoring turned out to be invaluable in following up systemic cardiovascular status. But balloon-tipped flow-directed thermodilution catheter (Swan-Ganz catheter) insertion carries additional inherent risks other than those of central venous catheterization, and it costs much more expense than simple venous catheter. There has been a lot of papers which argue that central venous catheterization may substitute for the Swan-Ganz catheterization. In addition, it may be very difficult or impossible to insert the Swan-Ganz catheter in pediatric patients. This study was performed to determine whether Swan-Ganz catheterization might be replaced by the central venous catheterization in regards to SO2. METHODS: In 17 pediatric open heart surgery (OHS) patients, from the central venous catheter, the tip of which had been located in the center of right atrium (RA) and pulmonary artery, blood samples were drawn for gas analysis simultaneously, which was done immediately after emergence from cardiopulmonary bypass. RESULTS: There were no significant differences between RA blood and mixed venous blood gas analyses except oxygen saturation. The oxygen saturations of both were linearly correlated with each other. The relation was SO2=17 0.8 SRAO2 (R=0.77, p<0.05) CONCLUSIONS: It may be concluded that RA blood may be used for blood gas analysis in place of mixed venous blood immediately after pediatric open heart surgery.
Blood Gas Analysis ; Cardiopulmonary Bypass* ; Catheterization, Central Venous ; Catheterization, Swan-Ganz ; Catheters ; Central Venous Catheters ; Heart Atria ; Heart* ; Humans ; Oxygen* ; Pulmonary Artery ; Thermodilution ; Thoracic Surgery*

No abstract available.
Angiotensin II* ; Angiotensins* ; Animals ; Endocrine System* ; Rats*