Fang-fang Xie

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PURPOSE To compare the cleanliness of root end preparations by using ultrasonic instrumentation and slow-speed handpiece. METHODS Thirty-two mesial roots of the first mandibular molars with two canals and mature root apices were assigned randomly to 2 groups, each group had 16 teeth. The root-end preparations were made respectively using ultrasonic(More)
PURPOSE To evaluate the effects of retrograde preparation between ultrasonic retrotips and traditional slow-speed handpiece. METHODS 27 maxillary second bicuspid teeth with two canals and one isthmus were divided randomly into 3 groups with 9 in each. The root-end preparations were made respectively using ultrasonic diamond tip Berutti and NiTi tip RE2,(More)
OBJECTIVE To define the association of the expressions of Fas/FasL and granzyme B with cell apoptosis in oral lichen planus (OLP) and progression of the disease. METHOD Immunohistochemical method and TUNEL were employed to study the expressions of Fas, FasL and granzyme B and cell apoptosis in 50 OLP cases (including 20 cases of atrophic-erosive OLP and(More)
Thermochemical conversion is the key technology for the comprehensive utilization of Chinese oil shale resources. Oil shales from three mining areas of Huadian Jilin were pyrolyzed at 500 degrees C in a quartz tube reactor and their pyrolyzed cokes and shale oil were derived. One oil shale was also pyrolyzed at 600 degrees C and 700 degrees C to assess the(More)
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