This study was designed to evaluate the frequency and the severity of root resorption of the permanent teeth before orthodontic treatment by means of radiograph in the malocclusion patients. In this study the author analysed the frequency and the severity of root resorption in individual teeth. the relationships of the frequency and the severity of root resorption and age, sex, Angle`s classification, overjet, overbite, and maxillary and mandibular incisor inclination, and the relationships of the frequency of root resorption and the characteristics of malocclusion and marked occlusal attrition showed in individual teeth. The results were as follows. 1. All of the persons examined showed some evidence of root resorption in one or more of the permanent teeth, 35.84% of the teeth examined and more frequent in female group than male group(p<0.01). 2. On the susceptibility of the root resorption in individual teeth in this study, the author found the mandibular incisors and the maxillary incisors, in the order named, to be most susceptible in all affected teeth, but maxillary central incisors, maxillary first bicuspids, and maxillary lateral incisors, in the order named, were more susceptible to marked root resorption. 3. The more proclined maxillary incisors the more affected root resorption in four maxillary incisors and the more proclined mandibular incisors the more affected root resorption in four mandibular incisors. 4. Overbite more affected root resorption than overjet, and the higher tender to openbite the more frequent was root resorption. 5. On the characteristics of malocclusion showed in individual teeth, the openbite teeth combined with crossbite, were most frequent in root resorption.
Bicuspid ; Classification ; Female ; Humans ; Incisor ; Male ; Malocclusion* ; Open Bite ; Overbite ; Root Resorption* ; Tooth

BjOrk and Skieller conluded after following facial growth patterns using implants in upper and lower jaw bones that stable structures, which are not influenced by the growth do exist and so these must be the reference landmarks in the process of superimposition. In spite of such facts, for the last 40 years since the discivery of stable structures, most orthodontists have preferred best fit superimposition method to structural method. Cases such as Angle's Class II division 2 malocclusion that show characteristic forward and upward growth or one under long period of poet-trdatment observation demonstrate that distindt differences exist between the two methods of superimposition. Today, ethical concerns prohidit further growth studies that use implants, and so there is no choice but to use stable structural superimposition method based on BjO;rks data. Thus, to encourage clincal use of stable structural superimposition method, logic for the use of stable structural superimposition method will be demonstrated, and its technical methods of application will be introduced step by step.
Jaw ; Logic* ; Malocclusion

Although we managed a patient with traumatic endophthalmitis with potent antibiotics for 7 days topically and systemically, her clinical symtoms and signs did not improved and her visual activity decreased from hand motion to light perception. So, we performed pars plana vitrectomy and lensectomy using the Ocutome(R) and Frognatome(TM) and achieved a successful result with final visual acuity of 50 cm finger count or better without evidence of phthisis bulbi in this case.
Anti-Bacterial Agents ; Endophthalmitis* ; Fingers ; Hand ; Humans ; Visual Acuity ; Vitrectomy*

OBJECTIVE: The purpose of this study was to evaluate the effect of casein phosphopeptide amorphous calcium phosphate (CPP-ACP) on the shear bond strength (SBS) of brackets bonded to non-demineralized teeth with either phosphoric acid etching or self-etching primer. METHODS: Sixty human premolars were randomly assigned to 1 of 4 treatment groups (n = 15 each): phosphoric acid etching (group 1); self-etching primer (group 2); CPP-ACP for 2 weeks + phosphoric acid etching (group 3), and CPP-ACP for 2 weeks + self-etching primer (group 4). After bonding of the maxillary premolar metal brackets, specimens were subjected to shear forces in a testing machine. Scanning electron microscopy was used to observe etching patterns on the enamel surfaces of all teeth. A 2-way analysis of variance was used to test for effects of CPP-ACP and etching system on SBS. RESULTS: Significantly higher mean SBSs were observed in groups subjected to phosphoric acid etching (i.e., groups 1 and 3; p < 0.05). On the other hand, SBSs did not appear to be influenced by CPP-ACP (i.e., groups 3 and 4; p > 0.05). We observed a uniform and clear etched pattern on the enamel surface of the phosphoric acid etching groups. CONCLUSIONS: CPP-ACP does not significantly affect the SBS of orthodontic brackets bonded to non-demineralized teeth, regardless of which adhesive method is used to bond the brackets.
Adhesives ; Bicuspid ; Calcium ; Calcium Phosphates ; Caseins ; Dental Enamel ; Hand ; Humans ; Microscopy, Electron, Scanning ; Orthodontic Brackets ; Phosphoric Acids ; Tooth

The effects of intravenous Verapamil administration on ventricular function were evaluated using grated radionuclide ventriculography in 15 patients with essential hypertension. Verapamil(0.1mg/kg) was injected as a bolus for 2 minutes followed by an infusion of 0.007mg/kg/min. Heart rate, blood pressure, ejection fraction, peak ejection rate, total filling time, and prak filling rate were assessed before and after Verapamil administration. The results were was as follows ; 1) Verapamil administration increased heart rate from 63+/-5 to 75+/-9 beats/min(p<0.01) and reduced systolic and diastolic blood pressure from 156+/-17/99+/-6mmHg to 139+/-16/88+/-6mmHg(p<0.01). 2) Ejection fraction, peak ejection rate, and total filling time were not changed significantly after Verapamil injection. 3) Right and left ventricular peak filling rate increased significantly only in patients in whom it was subnormal in the basal study) from 1.6+/-0.4 to 2.3+/-1.1 end-diastolic volumes/s, p<0.05 and from 2.5+/-0.6 to 3.1+/-0.8 end-diastolic volumes/s, p<0.05, respectively). In conclusion, it was found that intravenous Verapamil administration enhances ventricular diatolic function in patients with essential hypertension.
Blood Pressure ; Heart Rate ; Humans ; Hypertension* ; Radionuclide Ventriculography ; Ventricular Function ; Ventricular Function, Right* ; Verapamil*

OBJECTIVE: The purpose of this study was to evaluate the mechanical performance of mini-screws during insertion into artificial bone with use of the driving torque tester (Biomaterials Korea, Seoul, Korea), as well as testing of Pull-out Strength (POS). METHODS: Experimental bone blocks with different cortical bone thickness were used as specimens. Three modules of commercially available drill-free type mini-screws (Type A; pure cylindrical type, Biomaterials Korea, Seoul, Korea, Type B; partially cylindrical type, Jeil Medical, Seoul, Korea, Type C; combination type of cylindrical and tapered portions, Ortholution, Seoul, Korea), were used. RESULTS: Difference in the cortical bone thickness had little effect on the maximum insertion torque (MIT) in Type A mini-screws. But in Type B and C, MIT increased as the cortical bone thickness increased. MIT of Type C was highest in all situations, then Type B and Type A in order. Type C showed lower POS than Type A or B in all situations. There were statistically significant correlations between cortical bone thickness and MIT, and POS for each type of the mini-screws. CONCLUSION: Since different screw designs showed different insertion torques with increases in cortical bone thickness, the best suitable screw design should be selected according to the different cortical thicknesses at the implant sites
Biocompatible Materials ; Korea ; Seoul ; Torque*

BACKGROUND: Fentanyl, which is a potent synthetic micron-opioid receptor agonist, is one of the most widely used opioids in anesthesia and pain control. However, the pharmacodynamics of fentanyl show wide inter-individual variability. Therefore, this study was conducted to evaluate the influence of the blood-brain barrier transporter protein, p-glycoprotein, and micron-opioid receptor genetic polymorphism on fentanyl pharmacodynamics. METHODS: Seventy-nine patients who underwent posterior lumbar interbody fusion (PLIF) were included in this study. Postoperatively, the patients received fentanyl via an intravenous patient controlled analgesia device. The cumulative fentanyl doses and other pharmacodynamic data were then recorded at 2 h, 6 h, 12 h, 24 h and 48 h after the operation. In addition, genomic DNA was isolated from the patient's peripheral leukocytes and then evaluated for the presence of OPRM1 A118G and ABCB1 C3435T genetic polymorphism using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). RESULTS: The results of this study indicated that ABCB1 C3435T genetic polymorphism may be related to the cumulative fentanyl requirement for postoperative pain control. However, these findings were not statistically significant (P = 0.09). In addition, no relationship was observed between OPRM1 A118G and the cumulative postoperative fentanyl requirement. However, the cumulative postoperative fentanyl requirement was lower in the TTAA group (ABCB1 3435 TT, OPRM1 118 AA) than in the CCGG group (ABCB13435 CC, OPRM1 118 GG). CONCLUSIONS: The ABCB1 C3435T polymorphism may affect fentanyl pharmacodynamics. However, further studies are required to confirm the relationship between p-glycoprotein and fentanyl.
Analgesia, Patient-Controlled ; Analgesics, Opioid ; Anesthesia ; Blood-Brain Barrier ; DNA ; Fentanyl ; Humans ; Leukocytes ; P-Glycoprotein ; Pain, Postoperative ; Pharmacogenetics ; Polymorphism, Genetic

No abstract available.
Consensus ; Hyperthyroidism ; Thyroid Gland

PURPOSE: Human parechovirus (HPeV) and enterovirus (EV) are causative agents of a sepsis-like illness in neonates and of infections of the central nervous system in young children. The objectives of this study were to assess the prevalence of HPeV3 and EV infection in young children with a sepsis-like illness or with meningitis in Jinju, Korea. METHODS: Cerebrospinal fluid (CSF) samples were collected from 267 patients (age range, 1 day to 5 years) and assessed for HPeV and EV by performing reverse transcription polymerase chain reaction assay. Amplification products of the VP3/VP1 region of HPeV and of the VP1 region of EV were sequenced to identify the virus type. RESULTS: HPeV and EV were detected in 3.4% and 7.5% of the total CSF samples assessed, respectively. The age distribution of EV-positive patients (median age, 1.4 months) had a significantly broader range than that of HPeV-positive patients (median age, 7.8 months). The peak seasons for HPeV and EV infection were spring and summer, respectively. The clinical symptoms for HPeV and EV infection were similar, and fever was the most common symptom. Pleocytosis was detected in 22.2% of HPeV-positive patients and 35.5% of EV-positive patients. The VP3/VP1 gene sequence of the nine Korean strains clustered most closely with the Japanese strain (AB759202). CONCLUSION: The data indicate that HPeV infection is predominant in young infants (<6 months) and that meningitis without pleocytosis was caused by both HPeV and EV infection in children.
Age Distribution ; Asian Continental Ancestry Group ; Central Nervous System ; Cerebrospinal Fluid* ; Child* ; Enterovirus* ; Fever ; Gyeongsangnam-do ; Humans ; Infant ; Infant, Newborn ; Korea ; Leukocytosis ; Meningitis ; Parechovirus* ; Polymerase Chain Reaction ; Prevalence* ; Reverse Transcription ; Seasons

PURPOSE: Follicular thyroid carcinoma (FTC) is a relatively rare form of thyroid carcinoma that often presents at a more advanced stage of disease with a higher incidence of distant metastases because of its propensity for vascular invasion. However, FTC and papillary thyroid carcinoma (PTC) have similar prognoses when they are matched for age and stage. Therefore, this study was conducted to evaluate the useful prognostic factors and determine the optimal management of FTC. METHODS: This study was conducted on 216 patients with FTC who underwent thyroidectomy at our institutions between April 1986 and August 2006. The patients included 174 women and 42 men with a mean age of 41 (4~87) years, and patients underwent follow-up evaluation for a mean period of 114 (6~253) months. The potential risk factors for treatment outcome were calculated using multivariate analysis, and the prognostic accuracy of UICC/AJCC pTNM staging, AMES, AGES, MACIS, and Degroot classification for predicting survival were compared. RESULTS: During the follow-up period, 13 (6.0%) patients developed locoregional recurrences and 8 patients (3.7%) showed distant metastases. In addition, cause specific mortality was seen in 8 patients (3.7%). The overall survival and cause-specific survival (CSS) rates at 10 years were 95.4% and 89.3%, respectively, and these cases were accurately predicted by the AMES and pTNM staging systems. The Cox proportional hazards revealed that gender (P=0.015), angioinvasion (P=0.013), invasion to adjacent structure (P=0.003), widely invasive carcinoma (P=0.028), and distant metastases at the time of presentation (P<0.001) were independent prognostic factors for survival. CONCLUSION: The extent of surgery in cases of FTC should be individualized based on the clinicopathologic findings; Conservative surgery should be adequate for cases of minimally invasive FTC without angioinvasion, however total or near-total thyroidectomy should be conducted in cases of widely invasive and minimally invasive FTC with angioinvasion.
Adenocarcinoma, Follicular ; Carcinoma ; Female ; Follow-Up Studies ; Humans ; Incidence ; Male ; Multivariate Analysis ; Neoplasm Metastasis ; Prognosis ; Recurrence ; Risk Factors ; Thyroid Gland ; Thyroid Neoplasms ; Thyroidectomy ; Treatment Outcome