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Noori ZT Fekrazad R Eslami B Etemadi A Khosravi S Mir M 《Lasers in medical science》2008,23(3):283-287
There are several studies done to show the comparability of laser scaling and root planing with routine methods. The most suitable wavelengths for such an application are reported as 2,940 and 2,780 nm. The superficial interactions of the current wavelength with root surface is investigated in this study to compare the crater and crack formation during the procedures between ultrasound and Er,Cr:yttrium-scandium-gallium garnet (YSGG; 2,780 nm) laser-treated teeth. Thirty human teeth with calculus on their root surface, which were extracted because of the severe periodontitis, were selected for this interventional in vitro study. Calculus area were divided into two equal parts: One of them was prepared for Er,Cr:YSGG (Biolase, Waterlase, USA) laser irradiation and the other one for ultrasound treatment (Dentsply cavitron, DENTSPLY International, USA). The Er,Cr:YSGG laser was specified as follows: pulse energy = 50 mJ, power = 1 W, wavelength = 2,780 nm, pulse repetition rate = 20 pulse per seconds, tip length = 6 mm, and tip diameter = 600 microm. Nineteen of the laser samples (95%) and eight of ultrasound ones (40%) out of 20 samples in each group had craters showing a statistical significant difference (p < 0.001). The number and depth of these craters are also evaluated. Thirteen samples of the laser cases (65%) and all samples of the ultrasound group showed cracks with significant differences (p = 0.008). In addition, the number and width of cracks in both groups are reported. As a general conclusion, the laser-treated samples show more craters but less cracks. 相似文献
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Analysis of the glucocerebrosidase gene in Parkinson's disease. 总被引:2,自引:0,他引:2
Christine Sato Angharad Morgan Anthony E Lang Shabnam Salehi-Rad Toshitaka Kawarai Yan Meng Peter N Ray Lindsay A Farrer Peter St George-Hyslop Ekaterina Rogaeva 《Movement disorders》2005,20(3):367-370
Parkinson's disease (PD) is a common progressive neurodegenerative disorder characterized clinically by a combination of motor symptoms. Identifying novel PD genetic risk factors is important for understanding its pathogenesis. A recent study suggested that up to 21% of subjects with PD may have mutations in the glucocerebrosidase (GBA) gene. We investigated the GBA gene for mutations in 88 PD cases and 122 normal controls and detected the presence of heterozygous GBA mutations in 5 PD cases and in 1 control. Sequencing of the entire open reading frame of the GBA gene in a subset of 25 cases with early-onset PD (<50 years of age) uncovered no additional mutations. Our results demonstrate a marginally significant association of GBA mutations with PD and suggest that variations in the GBA gene may constitute a rare susceptibility factor for PD (P = 0.048). 相似文献
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Chintamani Vinay Singhal Parminder Lubhana Rakesh Durkhere Shabnam Bhandari 《BMC surgery》2003,3(1):8
Background
Perforation of gut by sharp metallic objects is rare and rarer still is their migration to sites like liver. The symptoms may be non-specific and the discovery of foreign body may come as a radiological surprise to the unsuspecting clinician since the history of ingestion is difficult to obtain. 相似文献47.
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Shabnam Ezzatian-Ahar Faisal Mohammad Amin Hayder Ghani Obaid Nanna Arngrim Anders Hougaard Henrik B W Larsson Messoud Ashina 《The journal of headache and pain》2014,15(1):27
Background
The circle of Willis is an important source of collateral blood flow to maintain adequate cerebral perfusion, particularly in the posterior circulation. Some studies report a relationship between incomplete circle of Willis and migraine, whereas other studies show no difference between the prevalence of incomplete circle of Willis in migraineurs and controls. In the present study we compared the prevalence of incomplete circle of Willis in female migraine patients without aura to female healthy non-migraine controls.Using 3-Tesla magnetic resonance angiography we recorded three-dimensional time-of-flight angiograms in 85 female participants (48 migraine patients without aura [median age 28 years] and 37 healthy controls [median age 25 years]). The images were subsequently analysed blindly by a neuroradiologist to detect incomplete circle of Willis.Findings
We found no difference between the prevalence of incomplete circle of Willis in patients, 20/47 (43%), and controls, 15/37 (41%), p = 0.252. Post hoc analysis showed a significant relationship between age and prevalence of incomplete circle of Willis, p = 0.003.Conclusion
We found no relationship between migraine without aura and incomplete circle of Willis. 相似文献50.
Burcu Bestas Pedro M.D. Moreno K. Emelie M. Blomberg Dara K. Mohammad Amer F. Saleh Tolga Sutlu Joel Z. Nordin Peter Guterstam Manuela O. Gustafsson Shabnam Kharazi Barbara Pi?tosa Thomas C. Roberts Mark A. Behlke Matthew J.A. Wood Michael J. Gait Karin E. Lundin Samir El Andaloussi Robert M?nsson Anna Bergl?f Jesper Wengel C.I. Edvard Smith 《The Journal of clinical investigation》2014,124(9):4067-4081