STATEMENT OF PROBLEM: Dental implant which has been developed gradually through many experiments and clinical applications is presently used to various dental prosthetic treatments. To conduct a successful function of implant prosthesis in oral cavity for a long time, it is important that not only structure materials must have the biocompatibility, but also the prosthesis must be designed for the stress, which is occurred in occlusion, to scatter adequately of load support. Therefore, it is essential to give the consideration about the stress analysis of supporting tissues for higher successful rates. PURPOSE: Recently, many implant manufacturing company produce various taper design of root form implant, the fixture is often selected. However, the stress analysis of taper form fixture still requires more studies. MATERIAL AND METHOD: This study we make the element models that five implant fixture; Branemark system(Nobel Biocare, Gothenberg, Sweden), Camlog system(Altatec, Germany), Astra system(Astra Tech, Sweden), 3i system(Implant Innovations Inc, USA), Avana system(Osstem, Korea)were placed in the area of mandibular first premolar and prosthesis fabricated, which we compared with stress distribution using the three-dimension finite element analysis under two loading condition. RESULTS: This study compares the aspect of stress distribution of each system with the standard of Von mises stress, among many resulted from finite element analysis so that this research gets the following results. 1. In all implant system, oblique loading of maximum Von mises stress of implant, alveolar bone and crown is higher than vertical loading of those. 2. Regardless of loading conditions and type of system, cortical bone which contacts with implant fixture top area has high stress, and cancellous bone has a little stress. under the vertical loading, maximum Von mises stress is more higher in order of Branemark, Camlog, Astra, 3i, Avana. under the horizontal loading, maximum Von mises is more higher in order of Camlog, Branemark, Astra, 3i, Avana.
Bicuspid ; Crowns ; Dental Implants ; Finite Element Analysis ; Mouth ; Prostheses and Implants

This study was conducted to investigate the effect of two-year course of food and nutrition on improving nutrition knowledge, dietary attitudes and food habits of junior college female students by questionnaires. The subjects were 108 college female students enrolled in the department of food and nutrition in Gyeonggi area. The results were as follows: There were no significant changes in the weights and BMI (Body Mass Index) after 2-yr course of food and nutrition. Nutrition knowledge (14.7 vs 16.3, p < 0.001) and dietary attitude (34.3 vs 35.8, p < 0.01) increased significantly after 2-yr course. However, no significant changes in food habit were observed. Among nutrition knowledge, the scores of functions (4.5 vs 5.2, p < 0.001) and understanding (6.7 vs 7.4, p < 0.01) of nutrients were significantly increased. The recognition of nutrition knowledge increased significantly (83.1 vs 95.7, p < 0.001). Among food habit, dietary habit (13.2 vs 12.5, p < 0.01) and health related habit (15.6 vs 14.6, p < 0.001) were significantly lowered after 2-yr course. The change in dietary attitudes showed significantly positive correlation with food habit changes (p < 0.05). These results showed that 2-yr course of Food and Nutrition had improved the nutrition knowledge and dietary attitudes. Therefore, providing the more systematic and appropriate nutrition education to students during their study period will be improved dietary attitudes and food habits.
Female ; Food Habits ; Humans ; Surveys and Questionnaires ; Weights and Measures

No abstract available.
Tibia*

Primary malignant melaomatosis of leptomeninges is uncommon, not reported in the Korea to this time. Primary melanomatosis of leptomeninges are not associated with any specific clinical or radiological symptoms. The diagnosis was made by ultrastructural demonstration of malignant melanoma cells from CSF. The patient is 23 years male, who has had meningeal irritating symptoms such as intermittent headache. Nausea, vomiting and disturbed consciousness. Brain CT and MRI showed no mass lesion but cytology of cerebrospinal fluid revealed malignant melanoma cells. There was no evidence of extracerebral melanoma.
Brain ; Cerebrospinal Fluid ; Consciousness ; Diagnosis ; Headache ; Humans ; Korea ; Magnetic Resonance Imaging ; Male ; Melanoma ; Nausea ; Vomiting

BACKGROUND: There are many reports about the correlation between cardiovascular disorders and estrogen deficiency in postmenopausal women. The purpose of current study is to know that postmenopausal estrogen therapy may affect the lipid metabolism and endogenous fibrinolytic system and exercise tolerance. METHOD: We investigated the relation of estrogen treatment (srogen 0.625 mg/day) to serum lipid levels, angiotensin converting enzyme activity, plasminogen activator inhibitor-1 and parameters of treadmill test in 22 postmenopausal women of normal coronary artery with abnormal exercise test complained with chest pain accompanied by postmenopausal symptoms. RESULTS: Estrogen treatment significantly elevated the serum HDL-cholesterol level (42.8 to 50.1 mg/dl, p<0.05) and reduced the PAI-1 level (16.2 to 10.4 ng/dl, p<0.01) without considerable side effects. During the exercise test, the positivity appearance time and total exercise duration is significantly increased after estrogen treatment. CONCLUSION: The postmenopausal use of estrogen favorably changed the lipid level, fibrinolytic system and might improve the microcirculation which may protect against the ischemic heart disease risk without significant side effects.
Chest Pain ; Coronary Vessels ; Estrogens* ; Exercise Test ; Exercise Tolerance ; Female ; Humans ; Lipid Metabolism ; Microcirculation ; Myocardial Ischemia ; Peptidyl-Dipeptidase A ; Plasminogen Activator Inhibitor 1 ; Plasminogen Activators ; Postmenopause

The small-incision cataract surgery by phacoemulsification with foldable posterior chamber lens implantation have recently permitted new options for combined trabeculectomy with cataract extraction. In the present study, we performed phacoemulsification and foldable intraocular lens implantation using small clear corneal incision in 20 patients with 22 glaucomatous eyes who had previously undergone trabeculectomy and determined its effects on visual acuity, intraocular pressure, the number of medications applied, and status of the filtering blebs. The mean follow-up period was 10.1 months and the mean time interval between the two surgeries was 14.7 months. The mean best corrected visual acuity was 0.19 preoperatively and 0.60 postoperatively and the postoperative visual acuity had improved in 19 eyes(86.4%). The mean(+/-standard deviation, SD) preoperative IOP was 16.7+/-5.88 mmHg and the mean(+/-SD) postoperative IOP at final visit was 15.5+/-4.07 mmHg. Postoperatively, the IOPs remained well controlled in 20 eyes(90.9%) without additional ocular hypotensives and required additional medications for control in 2 eyes(9.09%). And the funictioning bleb failures occurred in 5 eyes(22.7%). We found the procedure to be effective in restoring vision while controlling intraoperative pressure and preserving the filtering blebs.
Blister* ; Cataract Extraction ; Cataract* ; Follow-Up Studies ; Humans ; Intraocular Pressure ; Lens Implantation, Intraocular ; Phacoemulsification ; Trabeculectomy ; Visual Acuity

This study aimed to evaluate the refractive and visual results of the cases temporally overcorrected after laser in situ keratomileusis (LASIK). Among 582 myopic eyes that underwent LASIK using VISX STAR from March 1997 to October 1998, 105 eyes were overcorrected more than one diopter (D) one week after LASIK. 105 eyes were divided into three groups according to their spherical equivalent (SE) at one week: Group l (> or = 3D, 9 eyes), group ll (2-2.9D, 14 eyes), and group lll (1-1.9D, 82 eyes).Uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), SE, and complications were studied one day, one week, two months, and six months after LASIK. The mean preoperative SE was -11.17 +/-2.57D in group l,-9.40 +/-2.91D in group lland -8.09 +/-1.92D in group lll. At 6 months, the mean SE was 1.81 +/-1.61D, 0.04 +/-0.43D and -0.37 +/-0.76D in group l, ll and lll, respectively. The mean regression of SE from one day to six months was 1.85D, 2.27D and 1.73D in group l,ll and lll, respectively (p>0.05). The proportion of eyes that lost two or more lines of UCVA after LASIK compared to preoperative BCVA was 33.3% in group l, 10% in group ll, and 9.2% in group lll. There were central island (5 eyes), capsular wrinkling (3 eyes), free cap (1 eye), subepithelal metalic debris (1 eye), epithelial ingrowth (1 eye)as complications in all groups. With these results it might be concluded that hyperopia less than 3D one week after LASIK is temporary and disappears 6 months after surgery without any additional treatment, whereas hyperopia equal or more than 3D one week after LASIK still showed hyperopic refraction even after 6 months. Therefore, these eyes need further evaluation for the correction of hyperopia.
Follow-Up Studies* ; Hyperopia ; Keratomileusis, Laser In Situ* ; Visual Acuity

To compare the result of small-incision combined procedure with that of two-stage procedure, the authors retrospec- tively reviewed 21 patients (23 eyes) who underwent small-incision combined cataract and glaucoma surgery (group 1) and 21 patients (23 eyes) who underwent small-incision cataract surgery after trabeculectomy (group 2). Intraocular pressure (IOP), visual acuity, bleb status, antiglaucoma medications and complications were analyzed.The mean follow-up period was 12.9 (2.3~30.1) months in group 1 and 13.9 (2.1~35.9) months in group 2. The mean preoperative IOP was 21.1 +/-6.6mmHg in group 1 and 26.6 +/-9 .3 mmHg in group 2. The mean postoperative IOP was 14.3 +/-3 .7 mmHg and 15.8 +/-3.1 mmHg in group 1 and 2, respectively. At last visit,13 eyes (56.5%) in group 1 and 12 eyes (52.2%)in group 2 had functioning blebs, and 21 eyes (91.3%) in group 1 and 17 eyes (73.9%) in group 2 had well controlled postoperative IOP without antiglaucoma medications.Rupture of posterior capsule,bleb site leakage, hypotony occurred in both groups; button hole (1 eye in group 1) and hyphema (2 eyes in group 2) were observed. These results indicate that the small-incisioncombined cataract and glaucoma surgery may be as safe and effective as the two-stage procedure.
Blister ; Cataract* ; Follow-Up Studies ; Glaucoma* ; Humans ; Hyphema ; Intraocular Pressure ; Trabeculectomy ; Visual Acuity

Dedifferentiated liposarcoma is a variant of liposarcoma, and this is characterized by the coexistence of well-differentiated liposarcoma with areas of poorly differentiated, non-lipogenic tumor and this is also known to be associated with more aggressive behavior. Dedifferentiated liposarcoma occurs principally in the retroperitoneum or the deep soft tissue of limbs, but it can also occur in subcutaneous locations. We report here on a peculiar case of dedifferentiated liposarcoma that developed in the dermis, which is an exceedingly rare location for this type of tumor. The occurrence of this tumor in the dermis made it easy to surgically remove and monitor for recurrence, and we expect this patient to have a better prognosis than that of a patient with dedifferentiated liposarcoma located in the retroperitoneum or deep soft tissue.
Dermis ; Extremities ; Humans ; Liposarcoma ; Organothiophosphorus Compounds ; Prognosis ; Recurrence ; Skin

BACKGROUND: This study was undertaken to investigate the trends in domestic publications on bone metabolism during the last decade, and to document the characteristics of articles in South Korea. METHODS: Articles on bone metabolism including osteoporosis published between 1998 and 2012 were evaluated, in terms of title, type of articles, subspecialty, and authors' affiliations. We used descriptive statistics for presenting the characteristics of domestic publication on bone metabolism. RESULTS: Total of 247 articles, published articles between 1998 and 2012, were reviewed. Over a total study period of 14 years, the number of articles which was initially 109 in the first half term increased to 247 during the period of second half. Of these 247 articles, 52 were on basic research, and 195 were on clinical research. Although the types of article were added in the later 7 years were much diverse than that of the earlier 7 years, the proportion of original articles has decreased. CONCLUSIONS: Our findings presented the characteristics and trends of domestic publication on bone metabolism in South Korea, and concerns for editorial boards in future.
Osteoporosis ; Publications ; Republic of Korea