PURPOSE: This study was aimed to compare the survival and success rates, and long-term crestal bone loss according to the use of 2 connection types of dental implants (submerged-USII and non-submerged-SSII; Osstem Implant®) by analyzing the change in alveolar bone height after 1 year under load and during final follow-up period. MATERIALS AND METHODS: Between December 2004 and August 2008, patients with two types of Osstem implants (USII and SSII) were retrieved retrospectively. A total of 92 patients with 284 implants (USII=60, SSII=224) was finally selected. Their mean follow-up period was 7.5 years. The mesial and distal alveolar crestal bone changes were measured using radiographic images and the average was calculated at 1 year after loading and during final follow-up period. RESULT: Among the 284 implants, 4 USII and 7 SSII implants were removed, indicating 93.3% and 96.9% survival rates. Of the survived implants, mean crestal bone loss 1 year after loading was 0.39 mm for USII and 0.19 mm for SSII (P=0.018). During the final follow-up, mean crestal bone loss was 0.63 mm and 0.35 mm for USII and SSII, respectively, without statistical significance (P=0.092). According to the criteria for the success and failure of the implant by Albreksson and colleagues, final success rate was estimated as 86.7% for USII and 91.5% for SSII, respectively. CONCLUSION: At 1 year after loading, the average crestal bone loss was significantly different between USII and SSII; however, both types met the criteria for implant success. During the final follow-up, both groups showed insignificant bone resorption patterns and did not show any pathological clinical symptoms. Therefore, both implants exhibited high long-term stability.
Alveolar Bone Loss ; Bone Resorption ; Clinical Study ; Dental Implant-Abutment Design ; Dental Implants ; Follow-Up Studies ; Humans ; Retrospective Studies ; Survival Rate

BACKGROUND: Hepaitis A virus(HAV) infection occurs commonly during early childhood. Recent improvements in sanitation and hygiene have resulted in a decrease in HAV infection among children, while the clinical illness of hepatitis A and prevalence of antibody to HAV(anti-HAV IgG) have been increased, particularly in the 3rd decade of young male adults. We studied a seroepidemiology of anti-HAV IgG in combat policemen who were living together during their service in the combat police force. METHODS: We measured anti-HAV IgG(HAVAB, Abbott) from 1,009 healthy subjects with no history of transfusion of any blood products during the last 6 months. The mean age was 20.8 years. RESULTS: Overall, anti-HAV IgG was detected in 30.2% of study subjects. According to age, the positive rates of antibody were 15.7%, 25.9%, 31.5%, 38.1%, 43.5%, and 50.0% in 19, 20, 21, 22, 23, and 24 years respectively. The positive rates of anti-HAV IgG as to period of service were 17.3%, 28.1%, 40.9% in 0 month, 1-12 months, 13-24 months respectively. The positive rates of anti-HAV IgG were 27.0% in the urban group, 39.8% in the rural group. CONCLUSION: The positive rates of anti-HAV IgG in our data low compared with those of previous reports. We think that group living condition such as living in dormitories or barracks can be a risk factors for hepatitis A infection and that improvements to the sanitary system and active immunization would be necessary for prevention of it.
Adult ; Child ; Epidemiology ; Hepatitis A ; Hepatitis A Antibodies* ; Humans ; Hygiene ; Immunoglobulin G* ; Male ; Police ; Prevalence ; Risk Factors ; Sanitation ; Seroepidemiologic Studies* ; Social Conditions ; Vaccination

Percutaneous renal biopsy is an essential component for diagnosis and management of glomerular diseases. In order to elucidate clinical and pathological features, 494 renal patients who had undergone renal biopsies at Gil Medical Center from January 1989 to June 1999 were studied retrospectively. The male to female ratio was 1.3 : 1 and average age was 33.2 years. There were 370(83.5%) cases of primary glomerular disease and 58(13.1%) cases of secondary glomerular disease. Among primary glomerular disease, IgA nephropathy was the most common(175 cases), followed by minimal change disease(84 cases), membranous glomerulonephritis(34 cases), and focal segmental glomerulosclerosis(33 cases). In secondary glomerular disease, lupus nephritis was the most common(21 cases), followed by 11 cases of hepatitis B associated glomerulonephritis, 9 cases of Henoch-Sch nlein purpura, and 4 cases of diabetic nephropathy. Among 99 cases of asymptomatic urinary abnormalities, IgA nephropathy was most common(69 cases) followed by 12 cases of thin basement membrane disease, 4 cases of minimal change disease, and 3 cases of focal segmental glomerulosclerosis, membranous glomerulonephritis, nonspecific glomerulonephritis. Among 159 cases of nephrotic syndrome, minimal change disease was most common(60 cases) followed by 25 cases of IgA nephropathy, 23 cases of focal segmental glomerulosclerosis, 21 cases of membranous glomerulonephritis, and 13 cases of lupus nephritis. Documented complication of renal biopsies included 23 cases of gross hematuria, 6 cases of perirenal hematoma, and 4 cases of infection. Death, AV fistula, aneurysm or serious compications that required surgical intervention were not reported. In conclusion, the percutaneous renal biopsy is relatively safe, and useful for diagnosis and management of glomerular diseases. The most common type of primary glomerular disease was IgA nephropathy.
Aneurysm ; Basement Membrane ; Biopsy* ; Diabetic Nephropathies ; Diagnosis ; Female ; Fistula ; Glomerulonephritis ; Glomerulonephritis, IGA ; Glomerulonephritis, Membranous ; Glomerulosclerosis, Focal Segmental ; Hematoma ; Hematuria ; Hepatitis B ; Humans ; Lupus Nephritis ; Male ; Nephrosis, Lipoid ; Nephrotic Syndrome ; Purpura ; Retrospective Studies

BACKGROUND: Propylthiouracil (PIV) and methimazole (MMI) were widely used for the treatment of hyperthyroidism. Hepatic injury caused by these agents is a rare but serious complication. This study is to investigate the clinical features of hepatotoxicity from antithyroid drugs. METHODS: We reviewed 17 cases of hepatic injury during treatment with antithyroid drugs in patients with hyperthyroidism. Included were 6 cases we experienced and 11 cases reported in Korean literature from 1986 to 1999. We analyzed the clinical features of hepatic injury. RESULTS: Of 17 cases of hepatic injury, 12 were PTU cases and 5 MMI cases. The mean age of PTU cases was 40 years with 6/12 patients over 40 years old and 2/5 MMI cases were over 40 years old. The dose of PTU was 300 mg/d or more in 10/12 cases (83%) and the dose of MMI was 30 mg/d in 3/5 cases (60%). The hepatic injury occurred within 3 months in 8/12 PTU cases (67%) and within 2 months in 4/5 MMI cases (80%). The duration of hepatic injury tended to be longer in MMI cases than in PTV cases (median; 80 vs 41 days, p=0.102). In PTU cases, the duration of hepatic injury was correlated with the duration of drug use before hepatic injury (p<0.05). All of 8 biopsied cases who took PTU had predominantly hepatocellular necrosis. Two biopsied cases who took MMI had cholestatic jaundice and nonspecific abnormality, respectively. Biochemical findings of all MMI cases were compatible with cholestatic jaundice. As to the treatment of hyperthyroidism after hepatic injury, 4/12 PTU cases were treated with RAI therapy, 5 with MMI and one with surgery, and treatment was unknown in two. On the other hand 3/5 MMI cases interestingly entered into spontaneous remission after hepatic injury and 2/5 had RAI therapy. Hepatic dysfunction recurred in each one whom treatment by changing to MMI or PTU was tried on. CONCLUSION: Most of hepatic injury during treatment with antithyroid drugs developed within two to three months of drug use. The hepatic injury related to PTU was mainly cytotoxic whereas that related to MMI was cholestatic. Since there is a cross-reaction between PTU and MMI in hepatotoxicity, RAI therapy or operation shoud be considered as an alternative treatment of hyperthyroidism after hepatic injury.
Adult ; Antithyroid Agents* ; Hand ; Humans ; Hyperthyroidism* ; Jaundice, Obstructive ; Methimazole ; Necrosis ; Propylthiouracil ; Remission, Spontaneous