Objective:To test the effects of different preparation methods on the shear bond strength between porcelain veneers and the brackets.Methods:48 metal-porcelain veneers were randomly and evenly divided into two groups. The veneers in group 1 were grinded with stone, while others were intact. The veneers were bonded by acid etching,silicone coupler and acid etching combined with silicone coupler respectively.After bonding and 500 thermo cycle treatment, all veneers were submitted to shear bond strength test and the incidence of porcelain fracture was recorded.Results:The shear bond strength of the grinded samples was higher than that of the intact(P

BACKGROUND: As a kind of filling material for wedge-shaped defects, GC Fuji Ⅸ glass-ionomer cement has arose more and more attention. However, the comparison of repair results between GC Fuji Ⅸ glass-ionomer cement and reinforced glass-ionomer cement are poorly understood. OBJECTIVE: To compare the clinical effect of GC Fuji Ⅸ glass-ionomer cement and reinforced gtass-ionomer cement for repairing wedge-shaped defects of old people. METHODS: Totally 80 teeth were randomly divided into 2 groups, and filled by GC Fuji Ⅸ glass-ionomer cement (experimental group) and reinforced glass-ionomer cement (control group), respectively. The clinical effect of 2 materials were evaluated on color match, edge density heterozygosity, restoration integrity, occurrence of secondary caries and pulp symptom at immediately, 3 months, 6 months and 1 year after placement. RESULTS AND CONCLUSION: The color match of the experimental group was better than that of the control group at 3 months, 6 months and 1 year after placement (P < 0.05); and the edge density heterozygosity of the experimental group was superior to the control group at 6 months and 1 year after placement (P < 0.05); in addition, the restoration integrity of the experimental group was surpass the control group at 1 year after placement (P < 0.05). It demonstrated that GC Fuji IX glass-ionomer cement is an ideal choice for wedge-shaped defects of old people, which exhibits superior effects to reinforced glass-ionomer cement in 1-year follow-up.

BACKGROUND:The large watercress molded piece is longer than that of the normal molded piece, which is suitable for dental restoration of elderly patients with gingival recession and relatively long crown.
OBJECTIVE:To test and verify the effect of large watercress molded piece on the auxiliary repair of approximal caries lesions in molars of the elderly.
METHODS:Eighty-seven senile patients with molar approximal caries were randomly divided into two groups: those were repaired by large watercress molded piece as experimental group, and those repaired by traditional amalgam molded piece ascontrol group. Then we compared the comfortable satisfaction rate, the excelent and good rate of repair and the gingival index between the two groups immediately, 1, 3, 6 and 12 months after repair.
RESULTS AND CONCLUSION:The comfortable satisfaction rate of the experimental group was significantly higher than that of the control group at 1, 3, 6 and 12 months after repair (P< 0.05), and the gingival index was significantly lower than that of the control group (P< 0.05). The excelent and good rate of the experimental group was significantly higher than that of the control group at different time points after repair (P< 0.05). No loss or fracture of the restorations occurred in the two groups. These results demonstrate that the large watercress molded piece for repairing approximal caries lesions in molars of the elderly can better restore the anatomical shape and approximal points of teeth, and reduce food impaction and gingival inflammation.

Objective to observe the efficacy and application value of PFNA and Gamma in the treatment of intertrochanteric fractures in elderly. Methods 100 patients with intertrochanteric fractures were divided into PFNA group and Gamma group, who received PFNA treatment and Gamma treatment respectively. And the operation status of patients at different ages,postoperative recovery,and complications were observed. Results The operation time,intraoperatve blood soss of PFNA group were lower than those of Gamma group(P<0. 05). There was no significant difference in fracture healing time. The Harris score of the over 75s in PFNA group was higher than that in Gamma group(P<0. 05),and the complications were less than Gamma group(P<0. 05). Conclusion PFNA was suitable for the patients at differ-ent ages with the advantages of more rigid fixation,good anti-rotation,fewer trauma and fewer complications.

0.05). Serum glutamate pyruvate transaminase activity significantly decreased in the injured liver BMSCs group (P

Objective To analyze the current situation of voluntary counseling and testing(VCT) and improve HIV/AIDS prevention and control in Jiangxi province.Method VCT services in the province were analyzed using descriptive methodology.Result The province is in shortage of full time VCT workers.Of the individuals receiving pre-testing counseling,those receiving post-testing counseling and receiving referral counseling accounted for 5.22% and 1.39%,respectively.The individuals receiving tests mostly were aged 20-29 years,and a little less were aged 30-39 years.Higher positive rates of HIV screening tests were found in Pingxiang and Nanchang cities,accounting for 39.13% and 26.09%,respectively.Conclusion To improve VCT service and contain the spread of HIV/AIDS in this province,it is necessary to establish VCT networks,upgrade quality of counseling service and publicize VCT and its outreach activities among target population.

Objective:To observe and investigate the effect and mechanism of intrathecal injecting miR-125b mimic on regulating microglial and its-mediated NOD-like receptor protein 3 (NLRP3) inflammasome activation after spinal cord ischemia reperfusion injury (SCIRI) in rats.Methods:120 Sprague-Dawley (SD) rats were randomly divided into four groups: sham group (sham group, intrathecal injection of normal saline), injury group (IR group, intrathecal injection of normal saline), mimic group (IR+ intrathecal injection of miR-125b mimic) and control group (IR+ intrathecal injection of miR-125b control). In sham group, the aortic arch was exposed without clamping. In other groups, the aortic arch was clamped for 14 minutes, and then the artery clamp was removed to prepare SCIRI model. Rats in each group were given intrathecal injection for 3 consecutive days before operation, once a day. Immunofluorescence was used to observe the morphology of microglia and count the number of activated cells 48 hours after injury; double immunofluorescence was used to observe the distribution of Iba-1 and NLRP3 in cells. The protein expression of Iba-1, NLRP3 and cleaved caspase-1 in spinal cord were determined by Western blot, and the inflammatory factor IL-1 β was determined by enzyme linked immunosorbent assay (ELISA).Results:The activated microglias exhibited the amoeba morphology and increased Iba-1 fluorescence signal in immunofluorescence. The microglias in spinal dorsal horn of Sham group were all branched-like morphology and absent of the increased Iba-1 signal at 48 h post-IR. And the microglias in IR and control groups was all amoeba-like morphology with obviously increased number and intensity of Iba-1 signal, whereas in mimic group, the microglias were mixed morphology with the less increased number and intensity of Iba-1 signal ( P<0.05). And NLRP3 signals were mainly distributed in microglias with increased Iba-1 signal. Meantime, compared with Sham group, the protein expression of Iba-1, NLRP3, cleaved caspase-1 and IL-1β were significantly increased in IR group ( P<0.05). Compared with IR group, the above-mentioned protein expression were decreased in mimic group ( P<0.05). There were no statistical differences between IR and control groups in the above-mentioned protein levels ( P>0.05). Conclusions:Intrathecal injection of miR-125b mimic inhibits the SCIRI-induced microglial activation and then reduces NLRP3 inflammasome expression in spinal cords, thereby exerting an effective anti-inflammatory effects.

Objective To discuss the value of multi-slice spiral CT angiography (MSCTA)and digital subtraction angiography (DSA)in lower extremity arteriosclerosis obliterans.Methods MSCTA and DSA of lower extremity arteries were performed in 41 patients with lower extremity arteriosclerosis obliterans sequentially.The interval of these two examinations was no more than 2 weeks.DSA served as the reference standard and compared with MSCTA in terms of grading of stenoocclusive lesions,visualization of collaterals in lower extremity arteries.Results No significant differences of grading of stenoocclusive lesions,visualization of col-laterals were observed between MCTA and DSA in lower extremity arteries.Compared with the results of DSA,the sensitivity,spe-cificity,accuracy,positive and negative predictive value of MSCTA in the detection of arterial stenosis (≥ 50%)were 97.2%, 98.2%,93.8%,94.6%,98.2%,respectively.Conclusion MSCTA shows relatively high sensitivity and specificity in the diagnosis of lower extremity arteriosclerosis obliterans,can provide effective guidance of planning treatment in lower extremity arteriosclerosis obliterans.