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排序方式: 共有134条查询结果,搜索用时 15 毫秒
111.
112.
Lippo VJ Lassila Arzu Tezvergil Milla Lahdenperä Pasi Alander Akiyoshi Shinya Akikazu Shinya 《Acta odontologica Scandinavica》2013,71(4):196-204
Objective. Water sorption, flexural properties, bonding properties, and elemental composition of photopolymerizable resin-impregnated fiber-reinforced composite (FRC) materials (everStick C&B and BR-100) (FPD) were evaluated in this study. Material and methods. Bar-shaped specimens (2×2×25 mm) were prepared for water sorption and flexural strength testing. The specimens (n=6) were polymerized either with a hand light-curing unit for 40 s or, additionally, in a light-curing oven for 20 min and stored in water for 30 days. Water sorption was measured during this time, followed by measurements of flexural strength and modulus. A shear bond strength test was performed to determine the bonding characteristics of polymerized FRC to composite resin luting cement (Panavia-F), (n=15). The cement was bonded to the FRC substrate and the specimens were thermocycled 5000 times (5–55°C) in water. SEM/EDS were analyzed to evaluate the elemental composition of the glass fibers and the fiber distribution in cross section. Results. ANOVA showed significant differences in water sorption according to brand (p<0.05). Water sorption of everStick C&B was 1.86 wt% (hand-unit polymerized) and 1.94 wt% (oven polymerized), whereas BR-100 was 1.07 wt% and 1.17 wt%, respectively. The flexural strength of everStick C&B after 30 days’ water storage was 559 MPa (hand-unit polymerized) and 796 MPa (oven-polymerized); for BR-100, the values were 547 MPa and 689 MPa, respectively. Mean shear bond strength of composite resin cement to the FRC varied between 20.1 and 23.7 MPa, showing no statistical difference between the materials. SEM/EDS analysis revealed that fibers of both FRC materials consist of the same oxides (SiO2, CaO, and Al2O3) in ratios. The distribution of fibers in the cross section of specimens was more evenly distributed in everStick C&B than in BR-100. Conclusion. The results of this study suggest that there are some differences in the tested properties of the FRC materials. 相似文献
113.
Electrophysical agents (EPAs) are a core part of physiotherapy practice and entry level education. With the increase in the number of EPAs over time, their availability and use in contemporary physiotherapy practice is an important consideration when determining entry level curricula. Thus, the aim of the study was to ascertain the current availability and usage of EPAs in Australian physiotherapy practice. A purpose-designed questionnaire was mailed to all registered physiotherapists in Australia. A response rate of 27% was obtained (n=3,538). Nonresponder analyses indicated that the results were representative of the total population of Australian physiotherapists. Over 70% of respondents had access to ultrasound, cold packs/ice, heat packs, electrical stimulation for sensory stimulation, and interferential therapy. Two main groups of EPAs were used relatively frequently. The first group was used daily or monthly by 60% of respondents (ultrasound, hot packs, and cold packs/ice), and a second group (electromyographic and pressure biofeedback, interferential therapy, and electrical stimulation for sensory stimulation) was used on a daily or monthly basis by between 30% and 45% of the sample. A group of EPAs, including ultraviolet light, microwave, and shortwave diathermy, was not used by over 90% of the sample. The study has provided contemporary national data on EPA availability and use in Australia. 相似文献
114.
目的 :评价低温射频消融下鼻甲治疗慢性肥厚性鼻炎的临床效果。方法 :用射频消融术缩小 95例下鼻甲肥大致鼻塞患者的下鼻甲 ,术前及术后 3个月应用视觉模拟评分表 (VAS)评价鼻塞的主观感觉。结果 :患者术前鼻塞VAS评分左侧为 (6 9.5± 8.6 ) % ,右侧为 (71.3± 11.5 ) % ;术后 3个月左侧为 (2 6 .1±8.9) % ,右侧为 (31.3± 10 .5 ) % ,左右侧分别与术前比较 ,差异有高度显著性 (P <0 .0 1)。结论 :等离子低温射频下鼻甲消融术是安全、有效、微创的治疗鼻甲肥厚的方法。 相似文献
115.
Focal pulmonary abnormalities: evaluation with F-18 fluorodeoxyglucose PET scanning 总被引:31,自引:0,他引:31
Patz EF Jr; Lowe VJ; Hoffman JM; Paine SS; Burrowes P; Coleman RE; Goodman PC 《Radiology》1993,188(2):487
116.
117.
Pathogenesis of ductal plate malformation 总被引:4,自引:0,他引:4
VJ DESMET 《Journal of gastroenterology and hepatology》2004,19(S7):S356-S360
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119.
One hundred and six patients with angina pectoris who underwent routine coronary angiography and left ventriculography were given intracoronary injection of thallium 201. The myocardial images had excellent resolution because of lack of interference from the background activity. The myocardial images and the left ventriculograms showed 94% correlation. Correlation between scans and EKG was lower. There was no correlation between the degree of coronary artery stenosis and 201Tl scan. Currently, the intracoronary injection of 201Tl at rest does not yield additional information to coronary angiography and left ventriculography. 相似文献
120.
Caroli disease: high-frequency US and pathologic findings 总被引:5,自引:0,他引:5
Marchal GJ; Desmet VJ; Proesmans WC; Moerman PL; Van Roost WW; Van Holsbeeck MT; Baert AL 《Radiology》1986,158(2):507-511
Three infants with nonobstructive bile duct dilatation (Caroli disease) are described. The bile duct pathology was associated with autosomal recessive polycystic kidney disease in two patients and with severe destruction of the renal parenchyma of unknown origin in the other. Sonograms of the liver showed, besides bile duct dilatations, intraluminal bulbar protrusions, bridge formation across dilated lumina, and portal radicles partially or completely surrounded by dilated bile ducts. Liver biopsy was performed in two patients, and in one patient, the biopsy sample confirmed the findings noted on sonograms. These findings support the hypothesis that the normal embryogenesis of intrahepatic bile ducts is arrested in the pathogenesis of this disease. 相似文献