This paper reports the results of treating peridontal diseases with local irrigate on of matronidazole in five different concentrations. Comparative percentages of spirochets and coccal bacteria in pefridontal diseases were determined. It was found that metronidazole in concentrations over 0.05% were effective in treating of simple periodontitis, necrotic gingivitis, pregnant gingivitis and marginal gingivitis cet. This methoa is useful for those who can not be adminished with oral route.

Objective:To investigate the treatment effect of combined forsus appliance on young people's Angel Ⅱ~1 malocclusion. Methods:13 Angel Ⅱ~1 cases during pre-peak or peak period was chosen, treated with combined forsus appliance for an average period of 5.5 months, evaluated treatment effect through cephalometric and cast measurement. Results: All canines and molars have reached class Ⅰ or over-class Ⅰrelations, 13 patients' mandibular retrognathia face have gained significant improvement. Conclusion: The combined forsus appliance can be used in early functional treatment, improve class Ⅱ face type and decrease the difficulty of the second period and enhanced treatment effect.

OBJECTIVE:To determine the concentration of AstragalosideⅣin Yishenkangshuai tablet.METHODS:The sample was separated by using chloroform-ethyl acetatemethanol-water(15∶40∶22∶10)on the silica gel plates.The plate was scanned at510nm by camagⅡTLC scanner.RESULTS:The rate of recovery was99.28%and RSD was2.5%.CONCL_ USION:The method is simple,quick and repeatable.

Genetically modified organisms, as a high-tech product, break through the limitation of different organisms and create new organisms through gene implanting from other kinds of organisms. They not only bring great benefits to human beings but also bring some ethical issues including the effect on environment,the effect on human health,and the respect to hatural law.Moreover,this article argues some ethical issues during the process of commercialization and sale including how to maintain the consumers' benefits,the protection on researchers through potent right,the precautionary principle and label issues.

Alanine aminotransferase (ALT)abnormality is an indicator of the degree of liver inflammation caused by immune activation in patients with chronic hepatitis B (CHB).However,approximately half of the CHB patients with normal or mildly elevated ALT levels have concealed significant changes in hepatic histology.CHB patients with normal or mildly elevated ALT levels may have significant histopatho-logical changes in hepatic tissues,and those changes vary between HBeAg(+)and HBeAg(-)CHB patients.Attention and investigation on the clinical management of CHB patients with normal or mildly elevated ALT levels may have great significance in grasping the right treat-ment opportunity and reducing the risk of liver cirrhosis.

To study the effect of high altitude on the expression of transforming growth factor beta 1 (TGF ?1) during the healing process of radius fracture, a rat radius fracture model was established at a high altitude. The expression of TGF ?1 in callus was detected using of immunohistochemistry method. It was found that the expression of TGF ?1 in the rats of high altitude group were decreased significantly compared with the low altitude group, especially high altitude might affect the on day 3 and week 3 ( P

Objective To discuss difficulties and techniques of standard video-assisted thoracoscopic or laparoscopic surgery(SVATS or SVALS) for spine internal fixation.Methods Between July 2004 and September 2005,6 cases of vertebral lesions located in the T_5～L_1 segment(including 2 cases of vertebral tuberculosis) were given SVATS under single-lung ventilation for resection of diseased vertebral body,reconstruction with autograft or titanium mesh cage,and fixation with the Z-plate system or the CD-Horizon system.Other 2 cases of vertebral tuberculosis located in the L_2～L_3 segment underwent retroperitoneal gasless SVALS for lesion debridement,reconstruction with autograft,and fixation with the Z-plate system.For cases of vertebral tuberculosis,(anti-tuberculosis) drugs were administrated preoperatively for 3 weeks and postoperatively for 6 months.Results The lesion debridement and anterior decompression was completed in all the 8 cases,including internal fixation with the Z-Plate system in 7 cases and with the CD-Horizon system in 1 case.There were 5 cases of iliac autografting and 3 cases of titanium mesh cage reconstruction.The operative time was 6.5~12.6 h(mean,8.7 h) and the blood loss during surgery was 250~1 800 ml(mean,950 ml).The correction of the Cobb angle was 5?~18?(mean,12?).During a follow-up period for 2~13 months(mean,7.4 months) in the 8 cases,nerve functions recovered by 1~2 Frankel grade in 5 cases,and the Cobb angle lost by 4? at 6 months postoperatively in 1 case of metastatic adenocarcinoma at the T_7 segment.Conclusions Spine internal fixation of T_5～L_3 segment can be conducted successfully with SVATS or SVALS.The key to the question is accurate orientation of the port site,proper hemostasis of the segment blood vessel,and careful resection of the anterior wall of the vertebral canal.

Animals ; Carotid Arteries ; surgery ; Carotid Artery Injuries ; etiology ; Disease Models, Animal ; Female ; Mice ; Mice, Inbred C57BL ; Microsurgery ; Random Allocation

Benzene ; toxicity ; Carcinogens ; toxicity ; Chromosome Aberrations ; Genetic Predisposition to Disease ; Humans ; Leukemia ; chemically induced ; genetics

Objective To develop a new scoring system,Daping orthopedics operation risk scoring system for senile patient(DORSSSP),for preoperative evaluation of operative risks in the elderly patients with hip fractures based on acute physiology and chronic health evaluation(APACHE)Ⅱ scoring system and physiological and operative severity score for the enumeration of mortality and morbidity (POSSUM)and compare the new scoring system with APACHE Ⅱ and POSSUM in assessing surgical risks and predicting postoperative complications and mortalities.Methods A total of 260 patients with hip fractures treated in our department in recent five years were retrospectively and respectively evaluated with DORSSSP,POSSUM,progressed POSSUM(P-POSSUM)and APACHE Ⅱ scoring system to compare the value of three scoring systems in preoperative evaluation of operative risks and prediction of postoperative mortality and complications.Results POSSUM and DORSSSP predicted complications in 119 and 92 patients respectively,while the actual complication occurred in 84 patients.The prediction value of POSSUM was significantly higher than the actual value,while the prediction value of DORSSSP showed no statistical difference compared with the actual value.POSSUM,P-POSSUM and APACHEⅡ scoring systems predicted 16,10 and 12 deaths respectively,but there were six deaths in fact,with prediction value obviously higher than the actual value.DORSSSP predicted nine deaths,the closest value to the actual.Conclusions DORSSSP has good correlation with postoperative complications and mortalities.Compared with POSSUM and APACHE Ⅱ scoring system,more simple and practicable DORSSSP can more accurately evaluate the preoperative risks and predict the postoperative complications and mortalities in the elderly patients with hip fractures.