Spinal disease is the injury caused by congenital malformation, degeneration, inflammation and trauma. These injuries lead to structural lesion of spinal itself, intervertebral discs, spinal cord, nerve root and the attachment, and can cause spinal and associated diseases. Spinal diseases include some frequently encountered diseases, as well as some stubborn and serious diseases. These diseases may cause pain of head and neck, shoulder and arm, waist and leg when they are mild, and partial or thorough paralysis when they are serious. In this article, the history, development, foundations and research progress of non-surgical operation of spinal diseases and the developing tendency of modern spinology are introduced.

Colorimetry ; Coloring Agents ; Evaluation Studies as Topic ; Filtration ; methods ; Food ; Humans ; Image Interpretation, Computer-Assisted ; Mastication ; physiology ; Particle Size ; Time Factors

Objective To assess the feasibility of K value of dynamic contrast enhanced MRI (DCE-MRI) in evaluation of anti-angiogenic effects on nude mice with orthotopic transplantation tumor model of gastric cancer.Methods Nude mice with orthotopic transplantation tumor model of gastric cancer were randomly assigned to two groups:Treatment group (n =15),mice were given apatinib intragastrically for 18 days (100 mg/kg),and control group (n=15),mice were given ddH2O2 in the same manner.After 18 days,DCE-MRI was performed and K value was measured.Then the tumors were dissected from the adjacent tissues in order to detect the microvessel density (MVD) and vascular endothelial growth factor (VEGF) expression levels.MVD and VEGF expression level were compared between treatment group and the control group.Results MVD (x2 =4.89,P＜0.05) and VEGF expression level (x2 =8.69,P＜0.01) of treatment group were much lower than those of control groups.The Kt value of treatment group was significantly lower than that of control groups ([0.63±0.05]/min vs [1.66±0.23]/min,t=17.05,P＜0.01).Conclusion The value of k in DCE-MRI can be utilized to assess the effects of apatinib on nude mice with orthotopic transplantation model of gastric cancer.

Epilepsy is the common neurological disease, and antiepileptic drugs are the main means for the treatment of epilepsy. However, there is no conclusion on the timing of drug withdrawal in patients with epilepsy. In recent years, some large-scale prospective studies have provided some guidance on anti-epileptic drugs withdrawal. This article focused on the factors affecting the prognosis and timing of drug withdrawal, hoping to further the understanding of anti-epileptic drugs withdrawal and instruct clinical practise.

[Objective]To observe the histomorphology and ultrastructure of the intervertebral disc(I D) in the rat model with cervical vertebral unbalance of dynamic and static force.[Method]Sixty SD rates were randomly divided into 4 groups: 3 months,5 months,7 months and the control group.The cervical I D degeneration model was made by destroying the neck muscle of rats and the tissues wer collected every month.The number,area and thickness of the cartilage end-plate were measured by the means of Miyamoto's Classes.The ultrastructure of the apoptosis cells of the intervertebral disc was observed under the electron microscope.[Result]Compared with the control group,the 3 months group showed degeneratin changes,with disordered structure of the annular fibrosis and thickness increase of calcification layer and decrease of blood vessel unmber in the cartilage layer.Complete fibrosis was found in nucleus pulposus in 5 months model group,with the fibro lamellar structure disappeared and few blood vessel buds.The features of 7 months model group was similar to 5 months and osteophyma had been formed near the bordr of part intervertebal.Under the electron microscope,the number of surface projection and organelles was decreased.Fatty drop and apoptotic body could be seen in disc cells of 3 month model group.Few cells,broken collagen fibers in ECM and more cavitation cells for necrosis in 5 months and 7months model groups could be seen.[Conclusion]The cervical I D of model groups has shown typical morphological changes of degeneration and this trend was more serious with the time passing.In the early and middle stage of degeneration,the apoptosis cells can be seen,but in the terminal stage the cellular necrosis was more common.

In order to investigate the effects of vector-based hairpin small interference RNA (shRNA) on the reversal of multi-drug resistance (mdr) of A2780/Taxol cells, a novel vector pEGFP-H1/mdr1 containing mdr1-shRNA targeting at position 2943-2963 of mdr1 was designed and synthesized. Subsequently, A2780/Taxol cells were transfected with pEGFP-H1/mdr1, and the expression of mdr1 mRNA and P-gp was detected by using RT-PCR and Western blot respectively. MTT was used to measure the 50% inhibition concentration (IC(50)) of Taxol to A2780/Taxol cells. The results showed that at the 24th and 48th h after transfection, the expression of mdr1 mRNA was decreased to (52.1+/-1.0)% and (0.01+/-1.7)%, and that of P-gp decreased to (88.3+/-2.1)% and 0%, respectively. At the 48th h after transfection, the relative reversal rate of A2780/Taxol cells to Taxol was 69.54%. In vivo, the nude mice xenografts were injected with pEGFP-H1/mdr1, and then administrated Taxol. The tumor volume in pEGFP-H1/mdr1-transfected group was significantly reduced as compared with that in blank control group or pEGFP-H1-transfected group (807.20+/-103.16 vs 1563.78+/-210.54 or 1480.78+/-241.24 mm(3), both P<0.01). These results suggested that transfection of pEGFP-H1/mdr1 could efficiently down-regulate the expression of mdr1 mRNA and P-gp in A2780/Taxol cells, and effectively restore the sensitivity of A2780/Taxol cells to Taxol both in vitro and in vivo.

Objective To compare the dose distribution of reserved planned tangential beam IMRT(2-field IMRT) with multifields beams IMRT(6-field IMRT) of the bulk-recurrent chest wall in postmastectomy breast cancer patients.Methods For 8 patients with chest wall in postmastectomy breast cancer bulk-recurrence,2-field IMRT and 6-field IMRT plans were generated on PTV in Pinnacle Planning System.The prescribed dose of PTV was 50 Gy in 25 fractions and GTV was 66-70 Gy which irradiated incrementally by subsequent plan in 8-10 fractions.The conformal index (CI) and homogeneity index (HI) of 95％ of prescribed dose over PTV were compared,while the dose distribution on ipsilateral lung and heart were evaluated.Results The CI of PTV by 6-field IMRT (0.66 ± 0.08) was higher than that of the2-field IMRT (0.53±0.10)(t=7.99,P＜0.05).The HI ofPTV by6-field IMRT (1.36±0.08)waslower than that of 2-field IMRT (2.19 ±0.78) (t =9.04,P ＜0.05).There was no statistical difference in V5,V10,V20 and V35 for ipsilateral lung and in D V35 and D for heart between two plans.Conclusions Compared with 2-field IMRT,6-field IMRT might have a better dose distribution on planning target volume(PTV) for chest wall in postmastectomy breast cancer bulk-recurrence patients,butthere is no significant difference in dose-volume of ipsilateral lung and heart between two plans.

Objective To investigate the esthetic effect of anterior ultra-thin veneers which were fabricated from heat pressed IPS e.max press ingots of high translucency.Methods The whole 62 anterior teeth of 12 patients,who wanted to receive aesthetic restorative treatment,were invloved in the study.Grooves with 0.5 mm depth were marked at the center of the labial face by the use of spherical diamond burs with 1 mm in diameter.At the cervix of the teeth,the design of 0.3 mm shallow concave shoulder was adopted.IPS e.max HT ingots of different color were chosen to be hotpressed; the straining technique was used on the marginal ridge and incisor ridge of the ultra thin veneers after they had been carefully trimmed.Subsequently,the restorations were bonded with Variolink Veneer resin cement.After a short-term follow-up for 3 years,a modified USPHS criterion was used to evaluate the esthetic effect.Results The thickness of the ultra-thin veneers fabricated by heat pressing was 0.3-0.5 mm,marginal integrity of the veneers was perfect and fitted well with the marginal finishing line of the abutment,and then the translucency of veneers was high.There was no edge discoloring after the veneers were used for 6 months to 3 years,and they might produce an excellent chameleon effect by mixing the color of adjacent teeth and gums,and appeared a surface morphology of natural enamel after carefully carved.In the short-term clinical observation,none of the 62 veneers fractured or fell off; there was no case of dentin hypersensitivity.Conclusions Ultra-thin veneers fabricated from IPS e.max Press ingots have the following advantages,a simple operating procedure,high mechanical strength,and satisfactory esthetic effect.

Purpose To evaluate the feasibility of using dual-energy CT scanner to differentiate two contrast media bismuth and gadolinium. Materials and Methods Two phantoms containing contrast media of different ratio were scanned on dual-energy CT. Group 1 was mixture of iodine and gadolinium solution with volume ratio of 0∶1, 1∶6, 1∶1, 6∶1 and 1∶0. Group 2 was mixture of iodine and bismuth solution with mass ratio of 0∶1, 1∶6, 1∶1, 6∶1, 1∶0. Monoenergetic image reconstruction was performed at 80 keV. Liver VNC software was used for virtual scanning and iodine concentration analysis. Results Under 80 keV reconstruction, the measured CT attenuation of Group 1 was 379-383 HU, and 170-173 HU in group 2. The iodine concentration of two groups was not signiifcantly different between the calculated and actual iodine concentration (P>0.05). The dual-energy CT can distinguish two contrast media. Iodine and gadolinium contrast media were not statistically different, while iodine and bismuth contrast media agent could be easily differentiated. Conclusion Dual-energy CT can distinguish two contrast media with different attenuation.