The purpose of this study is to evaluate the color differences that can exist between differnet brands of dentin porcelain having identical shade designations. The instrumental colorimetric technique was used to determine these differences. The three brands of dentin porcelain used were Vita VMK-68, Shofu Vintage, and Ceramco II. The three shades selected were the Vita Lumin shades A2, B2, and C2. The color difference values were compared with each other using L*, a*, b*, three variables of the CIELAB color system, and E. The results of this study were as follows: 1. Corresponding shades of different brands of dentin porcelain produced different L*, a*, b* values. 2. The greatest E value in corresponding shade was found to exist between Ceramco II and Shofu Vintage, followed by between Vita VMK-68 and Ceramco II, and then between Vita VMK-68 and Shofu Vintage. 3. The E values in shade C2 were mainly influenced by L* value ; however none of L*, a*, b* values had greater influence on E values than the others in shade A2, B2. 4. Shofu Vintage had the highest b* value, followed by Vita VMK-68, and then Ceramco II.
Dental Porcelain* ; Dentin*

No abstract available.
Emergencies* ; Emergency Service, Hospital* ; Humans ; Statistics as Topic*

No abstract available.

We described the clinical manifestation of herpes zoster in thirteen children with underlying malignancies. Among the associated malignancies, hematologic malignancy including acute lymphotytic leukemia was the commonest and CNS tumors were also frequently associated. Pain was mild, and some showed high fever and abnormal liver function test results. Recurrent attacks were observed in 3 cases(23%). Thoracic segment and trigeminal nerve were commonly affected. In most cases, herpes zoster developed within two years after the diagnosis of the malignancy.
Child* ; Diagnosis ; Fever ; Hematologic Neoplasms ; Herpes Zoster* ; Humans ; Leukemia ; Liver Function Tests ; Trigeminal Nerve

In order to investigate the fundus fundings in myopic eyes and to clarify the correlation between the refractive error and the myopic fundus changes, 7968 eyes of school children with refractive error in Seoul were selected and the observation of ophthalmoscopic features of crescent of optic nerve, cup to disc(C/D) ratio and the spontaneous venous pulsation were attempted. The result of the study were summarized as follows: 1. The optic nerve crescent was counted in 2643 eyes(33.2%) among 7968 eyes and the temporal crescent was the most frequent localization(72.8%) in 2643 eyes. 2. The incidence of the optic nerve crescent was increased in proportion to the degree of myopia regardless of its localization type, however the incidence of the crescent was decreased at -7.0 D or higher myopes. 3. The mean horizontal C/D ratio was 0.24 +/- 0.13 and the C/D ratio of 0.4 or more were common in the myopia of -2.0 D or more. The correlation between the C/D ratio and the refractive error appeared statistically significant(p<0.05). 4. In most of eyes(98.6%), difference of the C/D ratio between right and left eye was 0.2 or less. 5. The spontaneous venous pulsation on the optic disc was observed in 594 of 7968 eyes(7.5%).
Child ; Financial Management ; Humans ; Incidence ; Myopia ; Optic Nerve ; Refractive Errors* ; Seoul

Forty eight cases of strabismus were treated with an injection of Botulinum toxin A(Oculinum(R)) into the extraocular muscle under electromyographic control. There were 18 cases of esotropia, 14 of exotropia, 2 of hypertropia, 13 of unila teral abducens nerve palsy and 1 eyeball deviation even after the removal of old intraorbital metalic foreign body. All of the patients were followed up at least 6 months after the injection. By the final visit, the mean correction of preinjection deviation was 52.7% in esotropia, and 56.8% in exotropia, but there was no statistical significance between the two groups. Two patients of hypertropia obtained poor alignment chan ges after the injection. Among 13 patients with sixth nerve palsy, 10 who received injection only obtained mean 53.2% of correction and 3 patients who underwent both the injection and Jensen operation obtained 71.6%. In the one case of old intraorbital foreign body, lateral and inferior deviation before the injection were 60 P.D. and 20 P.D. respectively. After 5 months of injection, it improved to orthophoria and diplopia disappeared at primary position. The most common complication was ptosis, and it occurred in 19 patients(39.5%). Induced vertical deviation had the longest mean duration, lasting for 71.1 dyas. Twelve of 48 patients did not show any complications. No systemic complications were observed in any of the patients.
Abducens Nerve Diseases ; Botulinum Toxins* ; Diplopia ; Esotropia ; Exotropia ; Foreign Bodies ; Humans ; Strabismus*

Mammalian epithelia produce the various antimicrobial peptides against the bacterial or viral infection, thereby acting as the active immune modulators in the innate immunity. In this study, we examined the effects of the various proinflammatory cytokines or LPS on cell viability and antimicrobial beta-defensin gene expressions in human corneal epithelial cells. Results showed that the cytokines or LPS did not exert severe cytotoxic effects on the cells, and that beta-defensin 1 was constitutively expressed, while beta-defensin 2 was specifically induced by IL-1beta, supporting the idea that these cytokines or LPS involve the defense mechanism in the cornea. Furthermore, the reporter and gel shift assay to define the induction mechanism of beta-defensin 2 by IL-1beta demonstrated that the most proximal NF-kB site on the promoter region of beta-defensin 2 was not critical for the process. Data obtained from the normal or patients with the varying ocular diseases showed that our in vitro results were relevant in the clinical settings. Our results clearly demonstrated that beta-defensin 1 and 2 are important antimicrobial peptides in the corneal tissues, and that the mechanistic induction process of beta-defensin 2 by IL-1beta is not solely dependent on proximal NF-kB site activation, thus suggesting that the long distal portion of the promoter is needed for the full responsiveness toward IL-1beta.
Binding, Competitive ; Cell Survival ; Cells, Cultured ; Corneal Diseases/metabolism ; Electrophoretic Mobility Shift Assay ; Epithelium, Corneal/drug effects/*immunology/metabolism ; Gene Expression ; Humans ; Interferon Type II/metabolism/pharmacology ; Interleukin-1/*pharmacology ; Lipopolysaccharides/metabolism/pharmacology ; NF-kappa B/metabolism ; Promoter Regions (Genetics)/drug effects/genetics ; Research Support, Non-U.S. Gov't ; Tumor Necrosis Factor-alpha/metabolism/pharmacology ; beta-Defensins/*biosynthesis/genetics/metabolism

STATEMENT OF PROBLEM: It is not clear how to make a stable bonding between zirconia ceramic and resin cement. And the study about surface treatment of zirconia ceramic or bonding resin cement are not enough. PURPOSE: To measure and compare the shear bond strength of some resin cements on zirconia ceramic after different surface treatments. MATERIAL AND METHOD: 48 ceramic discs were made of 3 ceramic materials, zirconia ceramics Zi-Ceram), heat-pressed ceramics (IPS Empress 2) and slip cast alumina ceramics (In-Ceram). According to the surface treatments of ceramic specimens and resin cements, specimens were classified into 6 groups and each group was composed of 8 specimens. For the surface treatment of Zi-Ceram group (test group), sandblasting and diamond bur preparation were applied and Superbond C&B and Panavia F were bonded respectively. For IPS Empress 2 group (control group), Variolink II was bonded after sandblasting, acid etching, silanization and for In-Ceram ALUMINA group (control group), Panavia F was bonded after sandblasting. After storing specimens in distilled water for 24 hours, the shear bond strength was measured by the universal testing machine. RESULTS AND CONCLUSION: 1. Zi-Ceram group with Superbond C&B cement showed higher bond strength than with Panavia F cement regardless to the surface treatments (p<0.05). 2. In Zi-Ceram group with Superbond C&B cement, sandblasting treatment group (12.1MPa) showed higher bond strength than diamond bur treatment group (7.7MPa) (p<0.05). In Zi-Ceram group with Panavia F cement, there were no significant differences in the bond strength according to the surface treatments (p>0.05). 3. Zi-Ceram group with sandblasting and Superbond C&B cement (12.1MPa) showed the highest bond strength. The bond strength of this group was not significantly different from In-Ceram ALUMINA group (10.4MPa) (p>0.05) and lower than IPS Empress 2 group (15.9MPa) (p<0.05).
Aluminum Oxide ; Ceramics* ; Dental Instruments ; Resin Cements* ; Water

The purpose of the study was to investigate the influence of an endodontic infection on presence of furcation involvement in periodontally-involved mandibular molars. All first and second mandibualr molars in 45 patients were selected if at least one was root-filled or had a possible periapical radiolucency. The sample consisted of patients from a referral population at a periodotnal clinic which represented an adult population with a mean age of 47.5 years (range 31 to 63) For mandibular molars with periapical destruction at both roots, frequency of horizontal furcation depth > or = 3 mm was significantly more compared to teeth without periapical destruction. Mean periodontal probing depth was significantly greater at mandibular molars with periapical destruction. It is suggested that a root canal infection in periodontitis-involved molars may potentiate periodontitis progression by spreading of endodontic pathgens through patent accessory canals and dentinal tubules. In conclusion, an endodontic infection in mandibular molars was found to be associated with additional attachment loss in the furcation area, and may thus be considered to be one of several risk factors influencing the prognosis of molars in periodontitis-prone patients.
Adult ; Dental Pulp Cavity ; Dentin ; Humans ; Molar* ; Periodontal Diseases ; Periodontitis ; Prognosis ; Referral and Consultation ; Risk Factors ; Tooth

PURPOSE: The most feared complication of gastrointestinal tract operations is anastomotic leakage, not only because of the presumed individual surgeon's culpability but also because of the assumption that this event is often fatal. We have experienced 32 cases of anastomotic leakage after elective gastric resection during 8 years. The purpose of this study was to evaluate the result of their treatment. MATERIALS AND METHODS: We evaluated the records of 1335 patients who had undergone elective gastric resection for an adenocarcinoma of stomach from January 1995 to October 2003 and conducted a retrospective, multivariate analysis. RESULTS: Of the 1335 patients, 32 (2.4%) sustained an anastomotic leakage. Anastomotic leakages usually developed on mean postoperative day 9.1+/-3.2 (range:1~18 days). Overall, 31.3% (10/32) of patients who sustained an anastomotic leakage died. The anastomotic leakages were identifed by radiological study or by operative finding at the site of the duodenal stump (20 patients), the esophagojejunostomy (7), the gastroduodenostomy (4), and the gastrojejunostomy (1). Fourteen patients (43.8%) underwent a relaparotomy, a drainage procedure in the main, and 18 patients (56.3%) were treated conservatively. The mortality rates were 42.9% (6/14) and 22.2% (4/18), respectively, but this difference was not statistically significant. A cox's proportional hazard analysis showed that a body-mass Index < 24 kg/m2 (odds ratio 5.55, 95% CI: 0.69~44.82) and non-enteral feeding (odds ratio 18.27, 95% CI 2.22~150.69) were independent factors of mortality due to anastomotic leakage. CONCLUSION: Our observations show that anastomotic leakage after an elective gastric resection has a high risk of being fatal. Moreover, for a patient with a body-mass index lower than 24 kg/m2 and/or non-enteral feeding, an anastomotic leakage after an elective gastric resection has a higher risk of being fatal.
Adenocarcinoma* ; Anastomotic Leak* ; Drainage ; Enteral Nutrition ; Gastrectomy* ; Gastric Bypass ; Gastrointestinal Tract ; Humans ; Mortality ; Multivariate Analysis ; Retrospective Studies ; Stomach ; Stomach Neoplasms