A 5-year prospective clinical study of Neobiotech implants for partially edentulous patients / 대한치과보철학회지

PURPOSE: The aim of the present prospective clinical study was to assess the cumulative survival rate (CSR) of Neobiotech implants restored with fixed partial prosthesis in relation to its potential risk factors. MATERIALS AND METHODS: Thirty six partially edentulous patients received Neobiotech implants and implant supported fixed partial prosthesis at Korea University Guro Hospital Dental Center from November 2009 until November 2011. The observation period was set from the implant placement and the last clinical visit until December 2015. Implant survival rate was determined using the Kaplan-Meier method. The relationship between implant survival rate and the potential risk factors were analysed using the multi Cox proportional analysis (P.05). CONCLUSION: Neobiotech implants showed predictable results with a 5 year cumulative survival rate of 97.1%.

A prospective study of patient satisfaction after implant supported mandibular overdenture treatment in fully edentulous patients / 대한치과보철학회지

PURPOSE: The purpose of this prospective study was to compare the satisfaction levels of the patients worn implant supported mandibular overdentures and conventional complete dentures. MATERIALS AND METHODS: Full edentulous patients (n=40) who were planned to do implant supported mandibular overdentures, aged 51 to 82 years, were enrolled in this study. All subjects rated their satisfaction levels (mastication, pronunciation, esthetics, pain, and general satisfaction) of their original conventional dentures prior to treatment and their new overdentures 1 week and 12 weeks after the delivery on 10 cm visual analogue scales. Repeated-measures ANOVA was performed to compare the satisfaction level of each three period (P<.05). RESULTS: The mean satisfaction levels of the implant supported overdentures after 1 week and 12 weeks of delivery were significantly higher than those of the conventional complete dentures in all scoring parameters (P<.05). After 12 weeks of overdenture delivery, the increase of the satisfaction levels in mastication, pronunciation, and pain and the decrease in esthetics and general satisfaction were observed in comparison with those after 1 week of delivery, however, no significant difference was found between the satisfaction levels of 1 week and 12 weeks after delivery. CONCLUSION: An implant supported overdenture might be one of the effective ways to give more satisfaction to patients who were not gratified with a conventional denture and eventually to improve their quality of life.

A Trial for Association between Oxidative Stress in Midterm Pregnancy and Postnatal Growth during the First Year of Life / 한국역학회지

OBJECTIVES: We aims to construct Infant Growth Cohort for evaluating whether oxidative stress in midterm pregnancy has an adverse effect on postnatal growth. METHODS AND MATERIALS: From September 2001 to April 2004, we constructed an Ewha Infant Growth Cohort connected with the Ewha Pregnant Women Cohort. We excluded mother-and-child pairs in which the mother had experienced hypertension or diabetes during pregnancy and had multiple births for this study, which gave us 233 mother-and-child pairs for analysis. We measured maternal serum homocysteine and urinary 8-hydroxyguanosine (8-OHdG) and malondialdehyde (MDA) at 24~28 weeks of pregnancy, and infant weights at birth and at 6 and 12 months postnatally. We applied repeated measures ANOVA with PROC MIXED to assess the significance of differences. RESULTS: We followed 64 and 85 infants at 6 and 12 months respectively. The mean body weights were 3146.4 g at birth, 8229.7 g at 6 months, and 1006.47 g at 12 months. The mean birth weight of infants was lower in mothers with higher homocysteine levels (third and fourth quartiles), but body weights from the first- and fourth-quartile groups of maternal homocysteine levels were lower than the others even though it was not statistically significant. Body weights at birth and at 6 months in third- and fourth-quartile groups of 8-OHdG levels were lower than the others. The body weights in the fourth quartile MDA group were significantly lower than the others at all time points. CONCLUSIONS: Maternal oxidative stress in midterm pregnancy may cause postnatal growth retardation. But, there were high rate of follow up loss and various measurement errors. Therefore, we need to have efforts for compete follow up and valid and reliable measurements.

Distribution and Correlates of Obesity in a Korean Rural People / 한국역학회지

OBJECTIVE: The aim of present study was to assess the distribution and correlates of obesity in a Korean rural people using both body mass index(BMI) and body fat percent. METHODS: A total of 1,243 participants were recruited using a two-staged stratified sampling. A structured questionnaire was used to ask their sociodemographics (gender, age, marital status, educational background, and etc.) and health-related behaviors (smoking, drinking, and regular exercise etc.). The data of weight-for height, and body fat percent were also collected by physical examination. For the estimation and analysis of correlates of obesity, we used BMI(>or=25kg/m2) and body fat percent(male>or=25%, female>or=30) as a cut-point of obesity. All analyses were stratified to three age groups(>20, 20-39, 40>or=). RESULTS: The prevalence of obesity in this study was higher than that in previous studies. This study showed that 32.6% (male: 33.7%, female: 31.7%) of participants according to BMI, and 45.6% (male: 43.8%, female: 47.4%) of them according to body fat percent were obese group. Logistic regression analysis showed that, in the criteria of BMI, while obesity was associated with female and low educational background under the age of 40, prevalence of obesity was higher in non smokers over the age of 40. In case of body fat percent crteria, single(unmarried, divorced, separated, widowed) were more likely to be obese in male aged 20 to 39 years. In the group aged 40 years and over, risk of obesity was higher in female than in male. CONCLUSION: This result suggests that obesity is common in Korean rural areas, especially among adolescents and female aged 40 years or over, and the risk factors for obesity were different by age. It is required that health management program focusing on obesity and its adverse outcomes should be developed in a community setting.

Is Laparoscopic Appendectomy Useful for the Treatment of Acute Appendicitis in Korea?: A Meta-Analysis

We performed a meta-analysis using results in the Korean literatures to determine whether laparoscopic appendectomy (LA) or open appendectomy (OA) provide the better outcome in possible acute appendicitis patients. To perform the meta-analysis, an extensive literature search was conducted, giving priority to the Journal of the Korean Surgical Society, and domestic literature in its search database, published since January 1993, to ascertain the usefulness of LA in the treatment of acute appendicitis. The criteria used for the quality evaluation were as follows: 1) study subjects must have been evaluated clinically for suspected acute appendicitis, and 2) articles were included only if sufficient data (e.g. patient number, mean and standard deviation of patient outcome variables) were available regarding patient outcomes for LA or OA treated appendicitis. Of the 136 articles retrieved, 8 studies (1, 258 patients) were selected for quantitative meta-analysis. Because insufficient data was available in some studies, operating time and hospitalization days were assessed for all 8 studies, but the time required to return to full functioning was assessed for only 3 studies. Overall effect size estimates were calculated using a random effect model for four patient outcomes (operating time, Q=38.6699, p < 0.001; length of stay, Q=19.3876, p < 0.001; postoperative hospital stay, Q=20.9164, p < 0.001; and return time to full functioning, Q=41.5061, p < 0.001). Because the overall effect size for operating time was -0.3218 (95% confidence interval [CI] -0.6108 to -0.0328), LA operating time was significantly greater than that of OA. In addition, a significant difference was found between the two modalities in terms of the length of hospital stay. Overall effect size in terms of the time required to return to full functioning was 1.9757 (95% CI 1.0066 to 2.9448), and LA reduced the time required by about 2 days versus OA. Considering the overall odds ratio (0.33) and 95% CI (0.20 to 0.55) the incidence of wound infection was significantly lower in LA than in OA. This review of the published evidence suggests that LA is more useful for treating acute appendicitis, especially when perforated appendicitis is suspected.

An experimental model of ischemia in rabbit hindlimb

This study was performed to establish an experimental model of ischemia for the investigation of new treatment modality of limb-threatening ischemia. We produced ischemia in the hindlimbs of 8 New Zealand white rabbits. Under general anesthesia, the left femoral artery was exposed, freed, and excised from distal external iliac artery to proximal popliteal and saphenous arteries. And then both hindlimbs were serially examined to assess the ischemia according to the time table until postoperative 6 weeks. We assessed clinical observation, blood pressure, radioisotopic perfusion scan, and angiography. Clinical ischemic changes of the operated feet were observed in 63%. The blood pressure of left calves was measurable on postoperative day 3 (p<0.05, vs preoperative day 2) and then gradually increased to reach a plateau in postoperative week 6. Radioisotopic arterial perfusion showed similar profiles as in blood pressure. Angiography of ischemic hindlimbs demonstrated a few collateral vessels arising from the internal iliac artery with the reconstitution of the posterior tibial artery in postoperative week 2. In postoperative week 6, collaterals remained the same in number. However, these became dilated and tortuous and showed reconstitution in distal hindleg. In conclusion, this is a reproducible, measurable, and economical animal model of hind limb ischemia.

Tuberculous Aneurysm of the Abdominal Aorta: Endovascular Repair Using Stent Grafts in Two Cases

Tuberculous aneurysm of the aorta is exceedingly rare. To date, the standard therapy for mycotic aneurysm of the abdominal aorta has been surgery involving in-situ graft placement or extra-anatomic bypass surgery followed by effective anti-tuberculous medication. Only recently has the use of a stent graft in the treat-ment of tuberculous aortic aneurysm been described in the literature. We report two cases in which a tuberculous aneurysm of the abdominal aorta was success-fully repaired using endovascular stent grafts. One case involved is a 42-year-old woman with a large suprarenal abdominal aortic aneurysm and a right psoas abscess, and the other, a 41-year-old man in whom an abdominal aortic aneurysm ruptured during surgical drainage of a psoas abscess.

Optimal Scan Time of Dual-phase Spiral CT in Normal Rabbit Liver: Effect of Contrast Injection Rate

PURPOSE: To determine the effect of contrast injection rate on rabbit liver enhancement and the optimaltem-poral window for dual-phase spiral CT of rabbit liver at each injection rate. MATERIALS AND METHODS: Usingspiral CT, seven New Zealand White rabbits underwent dynamic scanning at one level of liver. Three protocols ofcontrast injection rates were employed, namely 0.3 ml/sec(group 1), 1ml/sec(group 2) and 2 ml/sec(group 3). During120 seconds of total scan time, the scan interval was 3 seconds. Densities of the aorta, liver and portal veinwere averaged in equivalent time. The different injection rate protocols were compared for peak enhancement/timeon a time density curve. RESULTS: Mean peak enhancement (HU) in equivalent time(secs) was 310/18(group 1),383/9(group 2) and 357/6(group 3) in the aorta ; 34/36, 40/36 and 41/30 in the liver ; and 135/36, 153/24 and170/21 in the portal vein. The temporal window during the arterial phase was 12-21 sec(group 1), 6-12 sec(group2), and 6-12 sec(group 3). The temporal window during the portal phase was from 30 sec(0.3ml/sec), 21sec(1ml/sec)and 21 sec(2 ml/sec). CONCLUSION: During dual-phase spiral CT, the temporal window for liver scanningshould be determined according to each contrast injection rate. A slow contrast injection rate prolongs thetemporal window during the arterial phase.

Early Periventricular Leukomalacia: MRI and Ultrasonographic Correlation on First one Month of Life

PURPOSE: To compare the findings of early periventricular leukomalacia on MR imaging and on US. MATERIALS AND METHODS: MR imaging was performed in 17 neonates in whom well-demarcated increased periventricular echogenicity was seen on sonography. One more patient was included during the same period because MR imaging of this patient showed a periventricular lesion not suspected on previous US. Initial sonography was performed within 6 days of birth and was followed up between one week and one month later. MR images were obtained within the first month of life. RESULTS: Twelve of 17 neonates showed abnormal periventricular signal intensities on MR imaging. Follow up sonography revealed cystic changes in two cases and heterogeneous hyperechogenicities in three. All patients except the two with cystic changes showed normal periventricular echogenicity on final sonography, On MR imaging,11 cases showed multifocal periventricular increased signals on T1-weighted images, and two cases showed mainly decreased signals representing cysts. Positive findings were more evident on T1-weighted than on T2-weighted image. CONCLUSION: on T1-weighted imaging, the characteristic finding of early periventricular leukomalacia was multifocal periventricular hyper or hypointensities, and hyperintense lesions were more common than hypointense. In the diagnosis of early noncystic periventricular leukomalacia, MR imaging was more objective than US.

Cerebral Fat Embolism Syndrome: Clinical, CT and MR Findings

PURPOSE: CT and MR findings of cerebral fat embolism syndrome(CFES) have been rarely reported, because its diagnosis had been made on the basis of only clinical features in the majority of the cases. The purpose of this study is to describe the clinical, CT, and MR findings in six patients of CFES. MATERIALS AND METHODS: Brain CT and MR findings were retrospectively analyzed in six patients with CFES that was diagnosed on the basis of clinical and MRI findings. All six patients had long bone fractures and showed typical delayed clinical manifestations 2-3 days later. Both CT and MRI were examined in all of six patients. Initial CT scan was performed within 48 hours after trauma in all patients, andfollow-up CT scan was done in 2-11 days in two patients. MRI was done within 2-7 days after trauma in three patients, and 13 days, 18 days, and 45 days in other three patients. Follow-up MRI studies were performed in 2-60 weeks in four patients. Clinical and laboratory findings were analyzed retrospectively with medical records. CT and MRI findings were evaluated with regard to presence or absence of diffuse brain swelling and focal abnormalities of signal intensity(density). RESULTS: CT scans obtained within 2 days after trauma showed diffuse cerebral swelling in five patients and normal findng in one patient. On Tl-weighted MRI, diffuse cerebral swelling was shown in three cases and high signal spots suggesting cerebral petechial hemorrhage were noted in both caudate nuclei and thalami in two cases. On T2-weighted images, high signal spots which were shown on Tl-weighted image were not visible. In all of six cases, multiple lesions of high signal were observed mainly in the cerebral white matters, cerebellum and brain stem, probably representing ischemia/infarct or edema. On the follow-up MRI studies performed within a period from weeks to one month after trauma, the size and the number of the lesions were significantly decreased and these findings were well corresponded with clinical course. CONCLUSION: MR findings' of CFES include diffuse cerebral swelling, petechial hemorrhage and mi- croinfarcts, which characteristically improved in short period. In cases suspected of having CFES, MRI is more useful than CT for initial and follow-up studies because of its high detection rate of lesions and correspondence with clinical course.

Clinical experience of adverse drug reaction in gadolinium-DTPA enhancement of MRI

Gadopentetate dimeglumine(Gd-DTPA) has low toxicity and good tolerance and it is said that the observed adverse drug reaction of Gd-DTPA is compatible to those of iodinated nonionic contrast media. The overall incidence of adverse drug reaction of Gd-DTPA is even lower than those of iodinated nonionic contrast media. Then, the possibility of potential adverse drug reaction of these contrast media is not fully known and recently, many authors have a growing interest in this point. We have taken 2501 cases of MRI and exccure 1467 cases of Gd-DTPA enhancement scaning(58.7%0 and experienced 12 cases of adverse drug reaction(11 cases: mild reaction. 1 case: severe anaphylactic shock)and the overall incidence of our adverse drug reaction of Gd-DTPA was 0.8%. In conclusion, the adverse drug reaction of Gd-DTPA is not rare and the severe adverse drug reaction of Gd-DTPA may occur. So, the possibility of adverse drug reaction after Gd-DTPA injection should always be kept in mind, especially when the patient has a history of reaction to contrast material, allergy(particularly asthma) and cardiac disease. For the safe use of Gd-DTPA, well trained personnel and nearby emergent care facilities should be available.

Leiomyoma and adenomyosis: US and MR findings

Leiomyoma and adenomyosis of the uterus are the most common gynecologic disorders in an enlarged uterus. The characteristic US and MR findings in differentiation between both lesions were prospectively evaluated in 30 patients. Of 30 patients, 15 were leiomyomas, 6 were adenomyosises, 8 were leiomyomas and adenomyosises, and 1 was a normal pregnancy, histologically. The total number of leiomyom nodules were 49 while adenomyosises were 14 (9 diffuse and 5 focal). Among 49 myomas nodules, 36 were correctly diagnosed by sonography. The characteristic US findings of uterine leiomyoma were well defined nodules (36), hypoechoic peripheral rim (16), and whorl-like internal echoes (13). Forty four of the 49 myoma nodules were correctly diagnosed by MRI. The characteristic MR findings of myoma were well defined nodules (43), peripheral low signal intensity rim on T1WI (13) and T2WI (9), and peripheral high signal intensity rim on T2WI (5). Among 14 adenomyosises, 9 were correctly diagnosed by sonography. The characteristic US findings of adenomyosis were diffuse uterine hypertrophy more than 5.5cm in AP diameter with endometrial displacement and no significant echo change in myometrium All 14 adenomyosis as were correctly diagnosed from MRI. On T2WI, adenomyosis appeared as ill defined localized or diffuse thickening of the junctional zone more than 1cm in thickness. It was our conclusion that to differentiate between leiomyoma and adenomyosis focused on should be the detection of existence of nodule in leiomyoma, the primary sign, not on the secondary indirect sign.

Balloon dilatation of the prostatic urethra

No abstract available.