PURPOSE: The aim of this study was to evaluate the periodontal and prosthodontic complications of multiple freestanding implants in the posterior jaws for up to 1 year of function. MATERIAL AND METHODS: Eight patients received 20 implants posterior to canines. Two or more implants were consecutively inserted to each patient. Single crowns were delivered onto the implants. Marginal bone loss, implant mobility, probing depth, and screw loosening were examined to evaluate the clinical success of such restorations for maximum 1 year of functional loading. RESULTS: All the implants performed well during the observation period. Neither periodontal nor prosthodontic complications were found except a slight porcelain chipping. While the marginal bone level was on average 0.09 mm lower around the implant after 6 months of loading, it was 0.15 mm higher after 1 year. CONCLUSION: Within the limits of this investigation, separate single-tooth implant restorations to replace consecutive missing teeth may clinically function well in the posterior jaw.
Cohort Studies ; Crowns ; Dental Implants, Single-Tooth ; Dental Porcelain ; Humans ; Jaw ; Prospective Studies ; Prosthodontics ; Tooth

In cross sectional fashion we recoreded the cone response in 98 adult diabetics and 20 normal controls according to the recommendation by the International Society for Clinical Electrophysiology of Vision. The photopic oscillatory potentials were extracted from the cone response by highpass filtering. The clear media and attached retina were criteria for inclusion in this study. The data were statistically analyzed expecting that this procedure may provide a feature that could have some clinical significance. The analysis of variance demonstrated that the summed amplitude of the oscillatory potentials, and second oscillatory potential amplitude were the most sensitive parameters to the diabetic retina. A timing delay in the first oscillatory potential wavelet, and a reduction in the second oscillatory potential amplitude and the summed amplitude of oscillatory potentials were the commonest abnormalities. Hence, the second oscillatory potential amplitude and the summed amplitude of oscillatory potentials may be the most valuable indicator among the photopic electroretinogram parameters representing a quantitative measure of overall retinal dysfunction.
Adult* ; Electrophysiology ; Humans ; Retina ; Retinaldehyde

PURPOSE: Preamplifier and amplifier are very important parts for developing a portable counting or imaging gamma probe. They can be used for analyzing pulses containing energy and position information for the emitted radiations. The commercial Nuclear Instrument Modules (NIMs) can be used for processing these pulses. However, it may be improper to use NIMs in developing a portable gamma probe, because of its size and high price. The purpose of this study was to develop both preamplifier and amplifier and measure their performance characteristics. MATERIALS and Methodes: The preamplifier and amplifier were designed as a charge sensitive device and a capacitor resistor-rsistor capacitor (CR-RC) electronic circuit, respectively, and they were mounted on a print circuit board (PCB). We acquired and analyzed energy spectra for Tc-99m and Cs-137 using both PCB and NIMs. Multichannel analyzer (Accuspec/A, Caberra Industries Inc., Meriden Connecticut, U.S.A) and scintillation detectors (EP-047 (Bicron Saint-Gobain/Norton Industrial EP-047 (Ceramics Co., Ohio, U.S.A) with 2"x2" NaI (T1) crystal and R1535 (Hamamatsu Photonics K.K., Electron Tube Center, Shizuoka-ken, Japan) with 1"x1"NaI (T1) crystal) were used for acquiring the energy spectra. RESULTS: Using PCB, energy resolutions or EP-047 detectors for Tc-99m and Cs-137 were 12.92% and 5.01%, respectively, whereas R1535 showed 13.75% and 5.19% of energy resolution. Using the NIM devices, energy resolutions of EP-047 detector for Tc-99m and Cs-137 were measured as 14.6% and 7.58%, respectively. However, reliable energy spectrum of R1535 detector could not be acquired, since its photomultiplier tube (PMT) requires a specific type of preamplifier. CONCLUSION: We developed a special preamplifier and amplifier suitable for a small sized gamma probe that showed good energy resolutions independent of PMT types. The RESULTS indicate that the PCB can be used in developing both counting and imaging gamma probe.
Connecticut ; Ohio ; Optics and Photonics

No abstract available.
Amyloidosis*

Pheochromocytoma is a hazardous and dramatic cause of hypertension. This potentially lethal neoplasm originates in most cases in the adrenal medulla and less frequently in the cells of the extraadrenal paraganglion system which are disseminated along the paravertebral axis from the pelvis to the base of the skull. The organ of Zuckerkandl is paraganglia lying the abdominal aorta with highest incidence in the region of the inferior mesenteric artery and usually degenerate shortly after birth. In the literature, and additional one case of pheochromocytoma arising from the organ of Zuckerkandl associated with intracerebral hemorrhage which was treated recently in the Kyung Hee University Hospital is presented in this report.
Adrenal Medulla ; Aorta, Abdominal ; Axis, Cervical Vertebra ; Cerebral Hemorrhage* ; Deception ; Hypertension ; Incidence ; Mesenteric Artery, Inferior ; Para-Aortic Bodies* ; Parturition ; Pelvis ; Pheochromocytoma* ; Skull

STUDY DESIGN: Retrospective study. OBJECTIVES: The aim of the study was to investigate the usefulness of a handheld digital pulse oximetry in the detection of lower extremity arterial disease. SUMMARY OF LITERATURE REVIEW: Pulse oximetry is a well-established method for noninvasive evaluation of arterial oxygenation. MATERIALS AND METHODS: A Retrospective study was performed in 45 patients with lower extremity arterial disease. We compared the accuracy of a handheld digital pulse oximetry and the ankle brachial index (ABI). Digital pulse oximetry was conducted for 42 patients with 84 limbs to measure the SaO2 of their index fingers and big toes in supine position. The ABI was defined as abnormal if it was less than 0.9. Pulse oximetry of big toes was defined as abnormal if the SPO2 was less than 96% or it was more than 2% lower than that of the index finger. RESULTS: Digital pulse oximetry had a sensitivity of 47%(95% CI, 34-60%) and specificity of 86%(95% CI, 64-96%). ABI had a sensitivity of 49%(95% CI, 34-64%) and specificity of 95%(95% CI, 72-99%). Positive predictive values were 91%(95% CI, 74-98%) for digital pulse oximetry and 96%(95% CI, 77-99%) for ABI. Negative predictive values were 37%(95% CI, 24-51%) for digitial pulse oximetry and 43%(95% CI, 25-72%) for ABI. In 22 cases with acute ischemicwere the sensitivity 73%, the specifity 100%, the positive predictive value 100% and the negative predictive value 79%. CONCLUSIONS: Handheld digital pulse oximetry of the big toes seems as accurate as ABI to detect lower extremity arterial diseases. The combination of both will help to distinguish low extremity arterial disease and spinal radiculopathy.
Ankle Brachial Index ; Extremities ; Fingers ; Humans ; Lower Extremity* ; Oximetry* ; Oxygen ; Radiculopathy ; Retrospective Studies ; Sensitivity and Specificity ; Supine Position ; Toes

Angiosarcomas are rare tumors that are derived from vascular endothelial cells. They may occur in various sites, including the skin, breast, visceral organs and deep soft tissues. The pleura usually a metastatic site from angiosarcomas. However, thirty one cases of primary pleural angiosarcomas have been reported worldwide. Here, we report a 61-year-old man with a primary angiosarcoma of the pleura with a brief review of the literature.
Breast ; Endothelial Cells ; Hemangiosarcoma* ; Humans ; Middle Aged ; Pleura* ; Skin

No abstract available.
Anti-Bacterial Agents* ; Arthroplasty* ; Knee* ; Replantation*

OBJECTIVE: The purpose of this study is to determine the proper hand position during driving by measuring of the wheel rotation strength according to the wheel angle and hand position to the wheel. METHOD: BTE Work Simulator was used to measure the clockwise and counter clockwise static wheel rotation force of twenty healthy men in three different hand position (2~10 spot, 3~9 spot, and 4~8 spot) and two different wheel angle (45 degrees and 60 degrees), average and peak force were measured during maximal isometric contraction. RESULTS: The average and peak force was significantly different by the wheel angle, and hand position (p<0.01), but the direction of rotation didn't an effect on the rotation force. The hand position was the most significant factor, especially wheel rotation force at 2~10 spot hand position was significantly lower than that of 3~9 spot and 4~8 spot (p<0.05). The rotation force by the wheel angle was influenced by hand position, and lower in 60 degrees wheel angle in the 2~10 spot (p<0.05). CONCLUSION: The rotation force of wheel was influenced by the hand position. Therefore proper hand position is recommended during driving to reduce muscle fatigue.
Hand* ; Humans ; Isometric Contraction ; Male ; Muscle Fatigue

BACKGROUND: The advantages of addition of epinephrine to local anesthetics during caudal epidural anesthesia are core intense block, prolonged duration of anesthesia and reduction of systemic toxic effect of local anesthetics. The currently recommended concentration of epinephrine is 1 : 200,000, but absorbed epinephrines cause unwanted hemodynamic changes, so we attempted to ascertain the minimum effective concentrations of epinephrine during caudal epidural anesthesia. METHODS: Ninty patients classified ASA physical status I or II scheduled for perianal surgery were studied. These patients were divided into four groups who received 20 ml of 2% lidocaine with epinephrine concentrations of 1 : 100,000, 1 : 200,000, 1 : 400,000 or 1 : 800,000 respectively. Before and during anesthesia, patients' mean arterial pressure (MAP) and heart rate (HR) were measured. Caudal anesthesia was performed with patients in the jack-knife position. A 3 ml test dose was administered initially and then the remaining local anesthetics were injected slowly. The onset of analgesia, duration of analgesia, and other complications were observed. RESULTS: The onset of analgesia was slowest in the 1 : 800,000 group. The duration of analgesia was longest in the 1 : 100,000 group. There were no significant difference in MAP changes, but HR increased significantly in the 1 : 100,000 group compared to the 1 : 200,00 group. There were no systemic toxic symptoms for local anesthetics except that 1 patient, who was in the 1 : 100,000 group, had symptoms of palpitation and headache, considered to be the unwanted pharmacologic effects of epinephrine. CONCLUSION: We concluded that the 1 : 400,000 epinephrine concentration can be used during caudal epidural anesthesia.
Analgesia ; Anesthesia ; Anesthesia, Caudal ; Anesthesia, Epidural* ; Anesthetics, Local ; Arterial Pressure ; Epinephrine* ; Headache ; Heart Rate ; Hemodynamics ; Humans ; Lidocaine