Objective:To observe the histological character of distraction osteogenesis(DO) in the mandible of goat using an intraoral tooth-supported distraction device. Methods:8 goats (7-9 months of age) were divided into 4 groups with 2 goats per group. After a bilateral mandibular corticectomy between the second and third premolars, self-produced intraoral tooth-supported distraction devices were cemented. 5 days after operation,the distraction devices were begun to be activated 0.25 mm every 12 hours to advance the anterior segment 8 mm in 16 days. The animals of 32 days group were injected with tetracycline fluorescence labeing at 10 ml/kg once perweek from the beginning of DO.The animals were sacrificed on day 8,16,32 and 48 separately post activation, and tetracycline fluorescence labeling,HE staining and Mallory's 3-color staining were performed. Results:Tetracycline fluorescence labeling showed that there was green-yellow fluorescence labeling new bone within the distraction gap; HE and Mallory's trichrome staining showed that new bone gradually formed from bilateral sides, gradually blending and remodeling. The fiber bundles and newly formed trabeculas and various cells in early phrases showed to be orientation-directed along the axis of distraction force. Conclusion: New bone can be formed and regenerated along the axis of distraction force within the distraction gap.

AIM: To isolate three kinds of bufadienolides composition from Venenum bufonis in order to investigate their antitumor activity in vitro.METHODS: Alcohol extraction and isolation by Silica gel colume were employed in this study.Their antitumor activities in vitro were evaluated by MTT colorimetric method.RESULTS: With such methods,three kinds of bufadienolides,including Bufalin,cinobufagin,and resibufogenin with purity above 90% were prepared.The in-vitro results showed that three kinds of bufadienolides had prominent inhibition effect on human lung cancer A549 cells,human breast cancer MDA-MB-435 cells in the range of 0.001 ?g/mL ～ 100 ?g/mL.CONCLUSION: Isolation by Silica gel colume can be used to separate three kinds of bufadienolides from Venenum bufonis and its constituents has prominent anti-cancer effects.

Objective:To investigate the effects of strain force on t he expression of osteoclast differentiation factor(ODF) and osteoclasto-genesis i nhibitory factor(OCIF) in human periodontal ligament cells (HPDLCs). Met hods: HPDLCs were subjected to cyclic strain force for 0, 6, 12 and 24 h ours, mRNA expression of ODF and OCIF were determined by RT-PCR. Result s:After treatment of the cells for 0,6,12 and 24 hours the ODF/?-actio n values were 0.7280?0.0261,0.6831?0.0411,0.5801?0.2230 and 0.4572?0.0373( P0.05) respectively.Conclusion:Strain force may decrease the expression of ODF and increase the expression of OCIF.

Objective:To establish the cephalometric norms of soft tissue of adults in Xi'an area with normal occlusion.Methods:120 college students with normal occlusion(60 male and 60 female), aged from 18-22 years old in Xi'an city were selected.Lateral cephalometric film was taken by cephalometer for all the subjects at intercuspal occlusion.Then the films were traced on vitriolic paper, and the points were put into computer through digitizier. Statistic analysis were made and the data were compared with norms of adolescents already obtained.Results:Studied by Holdaway analysis,in the males FH-PgG' and Li-Pg' Ls of adults were bigger than those of adolescents, while Ss-Ls,Sn-H,Ls-Si and H-N'pg' were smaller(P0.05).Conclusion:The 3 sets of norms of soft tissue analysis obtained through this study may be applied as the norms of adults with normal occlusion.

Objective To design and develop an intelligent material cabinet system in the department to execute informatized management of auto replenishment,quality safety and statistical query.Methods The intelligent material cabinet system had the functions of auto replenishment after inventory prewarning,recalling material record after login of an authorized user,and quality control of enterprise qualification and expiration prewarning.Mircosoft.Net technology framework,C/S architecture design and MS SQL Server database were involved in to develop the system,which was composed of a weighing cell,an electronic display screen,a material tray,an intelligent material cabinet and etc.The cabinet system had uniprocessor and network versions,and realized medical material fine management based on the hospital intranet.Results The cabinet system contributed to standardized operation,high-efficiency transport and quality safety.Conclusion The cabinet system behaves well in standardized,streamlined and informatized medical material management,and thus is worthy promoting practically.

[Summary] The basic data and serum targets of 3 349 residents were collected by multi stage stratified cluster random sampling and analyzed by correlation and regression analysis to access its association with cardiovascular risk factors. The result showed that morbidity of hyperuricemia was 18. 85% . The risk of hyperuricemia was raised in people with high triglycerides, high low-density lipoprotein-cholesterol ( LDL-C), low high-density lipoprotein-cholesterol(HDL-C), and low estimated glomerular filtration rate(eGFR). The people with hyperuricemia are usually accompanied with many cardiovascular risk factors.

Objective To study whether the uremic toxins accumulated long-term in uremia patients may be involved in oxidation of protein by forming advanced oxidative protein products (AOPPs). Methods Malonylaldehyde (MDA), hippuric acid (HA) and p-cresol were used as the representatives of uremic toxins. Human albumin serum (HSA), plasma specimens from normal or uremia patients were incubated respectively with MDA (10 retool/L), HA (20 mmol/L) and p-cresol (10 retool/L) or PBS (20 retool/L, pH 7.4, as control groups) at 37℃ for 30 minutes or 24 hours, respectively. Those indices such as AOPPs, protein thiol groups (Pt-SH) and dityrosine were used as biomarkers of protein injury. High performance liquid chromatography (HPLC) was employed to identify the aggregation and cross-links of modified proteins. Results AOPPs levels in all groups containing poison compounds were significantly increased by 121.5%(P<0.05) compared to that in control groups. Uremic toxins also resulted in over 14.7% loss in Pt-SH (P< 0.05) and 119.2% increment in dityrosine, respectively (P<0.05). Meanwhile, the formation of HMW-AOPPs in a time-dependent manner was observed by HPLC and cross-linked protein levels were significantly increased by 148.45%～333.3% in comparison with control groups. Conclusion Uremic toxins can directly mediate the damage of proteins by inducing the formation of HMW- AOPPs in a time-dependent manner, which is also one of the mechanism of AOPPs production in vivo besides the activation of the myeloperoxidase-H2O2-Cl pathway.

Objective To assess the effect of L-carnitine(L-CN)on left ventricular hypertrophy(LVH)in patients undergoing maintenance hemodialysis. Methods Thirty-one patients undergoing hemodialysis were randomly divided into the L-CN group(n =20)and the control group(n = 11). Patients in the L-CN group received additional intravenous injection of 1.0 g L-CN immediately after hemodialysis for a 6-month period. Patients in the control group received isovolumic saline. Using echocardiography,left ventricular mass (LVM),left ventricular mass index(LVMI)and the ejection fraction(EF)were measured before and after the treatment. Plasma calculus,plasma phosphorus and hemoglobin levels were measured. Results The LVM decreased significantly from(252. 03 ±32. 29)g to(204. 47 ± 37.33)g in patients in L-CN group(P ＜ 0. 05),the LVMI decreased significantly from (155.83 ± 23.42)g/m2 to(129. 21 ± 17.46)g/m2 in patients in the L-CN group. However,LVM and LVMI remained unchanged in the control group. Conclusions Supplementation with L-CN induced hypertrophy of LVH in patients on maintenance hemodialysis.

Objective To study and estimate the effective dose of interventional employees in the common cerebralvascular, cardiovascular and liver interventional diagnosis and treatment.Methods The absorbed doses of tissue or organ of anthropomorphic phantom in these three procedures were estimated by the anthropomorphic phantom experiment.The effective doses were calculated by the tissue weight factor which was given by International Commission on Radiological Protection publication 103.Results The effective doses to high, medium and low group were 24.0, 9.7,6.8 μSv for cerebralvascular interventional diagnosis and treatment, and 36.3, 29.3, 17.8 μSv for cardiovascular interventional diagnosis and treatment, and 23.9, 11.3, 5.5 μ Sv for liver interventional diagnosis and treatment, respectively.Conclusions The effective doses of high, medium and low group of interventional employees in cardiovascular interventional procedure are higher than those of cerebralvascular and liver interventional procedures.

Objective To explore the effects of extrinsic and intrinsic recognition loading on gait in patients with Parkinson disease.Methods Eight patients with Parkinson disease and six control subjects were instrutted to walk with extrinsic and intrinsic recognition loading respectively.The gait parameters in two conditions were measured with three-dimension motion analysis equipment.FAB scale and Stroop Test were used as the evaluation of executive function.Results The velocity(cm/s),the cadence(step/min),single support and swing phase(%)in the audition stimulates condition in the patients group((113.4±14.32)step/min,(78.90±16.35)cm/s,(40.50±2.58)%,(40.50±2.58)%)were significantly better than those in the calculation condition(respectively(91.27±15.54)step/min,(63.79±21.49)cm/s,(37.95±2.61)%,(37.95±2.61)%).In the calculation condition,the coefficients of variability in stride length,swing and sinfle support phase were significantly higher in the patient group(respectively(6.69±3.99),(8.56±5.69),(8.56±5.69))than in thecontrol group(respectively(3.23±1.34),(5.02±2.54),(5.02±2.54));in the audition condition,except that,the coefficients of variability in step length and velocity also were significantly higher in the patient group(respeetively(11.92±5.86),(6.89±4.98))than the control group(respectively(7.35±3.32),(2.5±1.53)).In the patients group,the score of FAB(15.63±1.51)was lower and error rates of Stroop test(0.087±0.056)was higher than those in the control group(respectively(17.67±0.52),(0.027±0.03))significantly.The error rate of stroop-3 was significantly negative correlated with the gait variables of patient group in the calculation condition.Conclusion The extrinsic audition stimulates has lower effect on the gait of patients of Parkinson's disease than the intrinsic recognition loading.