BACKGROUND:Studies have confirmed that nicotine affects the activity of osteoblasts, osteoclasts, fibroblasts and erythrocytes.
OBJECTIVE:To study the nicotine effects on osseointegration and the expression of osteoprotegerin and bone morphogenetic protein 2 after implantation of dental implants with surface treatment by sandblasting or acid etching.
METHODS:Twenty-four Sprague-Dawley rats were randomly assigned to two groups and received daily injections for 2 weeks as folows: Nicotine 2 mg/kg twice for experimental group, saline solution for control group. Then the titanium implants with surface sandblasting or acid etching were implanted into the tibiae folowed by continuous nicotine or normal saline injection. At weeks 2 and 4 after implantation, the implants and surrounding bone tissue were prepared for CT, X-ray and hematoxylin-eosin staining examinations to evaluate bone healing and expression levels of bone-related genes were measured by quantitative RT-PCR.
RESULTS AND CONCLUSION: Compared with the control groups, the degree of osseointegration and the expression of osteoprotegerin and bone morphogenetic protein 2 in the experimental groups were decreased significantly (P < 0.05), except that the expression of bone morphogenetic protein 2 in the experimental group with acid etching was not significantly reduced. In addition, the expression of bone morphogenetic protein 2 in the experimental group with acid etching was higher than that in the experimental group with sandblasting at 2 weeks after implantation (P < 0.05). The X-ray and CT show that the quantities of new generation bone and the degree of bone mineralization of the sandblasting group were significant lower than those of the acid etching group under the intervention of nicotine. Hematoxylin-eosin staining showed that the activity and quantity of osteoblasts around the implants down-regulated significantly, but acid etching-treated implants showed better outcomes than sandblasting-treated implants.

Objective To investigate the year rhythm of laryngeal cough.Methods To record the attack months,the syndromes of TCM and degrees of symptoms in detail and analyze the data by percentage and Ridit analysis.Results The periods of laryngeal cough are in spring(March to May) and in autumn(September to November).The syndromes of TCM such as wind violating lung are commonly coughed in spring and primarily mild degree.The syndromes of TCM such as fire hyperactivity are commonly coughed in autumn and primarily moderate degree.Conclusions There is significant year rhythm in laryngeal cough.To master the rhythm can help the diagnosis and treatment.

The vaccine based on dendritic ceil has becomes a new research focus in the biotherapy of breast cancer. And the ways of making the vaccine are vary and no one approach has been shown to be superior to another.

OBJECTIVE:To establish a method for the dissolution determination of Dronedarone hydrochloride tablet,and eval-uate the quality consistency of its generic and original preparations. METHODS:UV spectrometry was performed on the column of 288 nm,dissolution media of Phosphate buffer solution (pH4.5),0.1 mol/L Hydrochloric acid solution [adding into 0.5% sodium dodecyl sulfate(SDS)],Phosphate buffer solution [pH6.8,adding into 0.5%SDS] and water,volume of dissolution medium was 1 000 ml,rotation speed was 75 r/min,the dissolution of generic and original preparations of Dronedarone hydrochloride tablet was detected,and the similarity of dissolution curve was evaluated by calculating the similarity factor (f2). RESULTS:The linear range of dronedarone hydrochloride was 2.147-25.764 μg/ml;RSDs of precision,stability and reproducibility tests were lower than 2.0%;recoveries 4 dissolution media were 99.53%-101.05%(RSD=0.48%,n=9),98.95%-100.05%(RSD=0.39%,n=9), 99.54%-100.20%(RSD=0.24%,n=9)and 98.54%-100.06%(RSD=0.44%,n=9). In the 4 dissolution media,f2 of the dissolu-tion curve of 3 batches of generic and original preparations of Dronedarone hydrochloride tablet was 56,60,63,68,68,52,59, 67,65,68,76,62,respectively. CONCLUSIONS:The method is suitable for the dissolution determination of Dronedarone hydro-chloride tablet;meanwhile,the in vitro dissolution curves of generic and original preparations of Dronedarone hydrochloride tablet show similarity,so the quality consistency is good.

Objective To evaluate the value of high frequency ultrasound in the postoperative rehabilitation treatment of rotator cuff tear.MethodsEighty-seven patients suspected as rotator cuff tear were detected by ultrasound.Fifty four patients suffered from part or entire tear were gone under the knife.Twenty-seven patients were control group with the autonomic functional training,the other twenty-seven patients were rehabilitation group with the regular rehabilitation training,Clinical functional and ultrasound scoring were performed through the two groups to evaluate the effects of rehabilitation treatment.Efficacy evaluation assessments were taken one year after operation.ResultsThe clinical symptoms were consistent with the ultrasonographic results in different time after operation.The clinical functional and ultrasound scores in rehabilitation group had no statistical difference with control group when 2 and 4 weeks after operation (P ＞ 0.05),the clinical functional and ultrasound scores in rehabilitation group were better than control group when 8,12 and 16 weeks after operation( P＜0.05 or P＜0.01 ).The efficacy evaluation assessments in rehabilitation group were much better than control group(P＜0.01).ConclusionsHigh frequency ultrasound has great significance in the postoperative rehabilitation treatment of rotator cuff tear.

This was a restrospective clinical study of 32 children with fractured anantierior tooth fragments. The teeth was reattached by dual cured resin composite (Panavia F), 3M Z350 resin and 3M siglebond-2 bonding agent for at least 6-month recall examination. Only 2 of the restorations were lost, resulting in a 93.75% overall retention rate. The retention teeth exhibited good esthetics and normal function. The high retention rate in this study suggests that reattachment of fractured anantierior tooth fragments offers a convenient viable restorative option for the clinician.

Subcortical ischemic vascular disease (SIVD) is considered to be the most important and common cause of vascular cognitive impairment (VCI). If patients with subcortical ischemic vascular cognitive impairment (SIVCI) and subcortical vascular cognitive impairment (sVCI) can be found early, it is possible that vascular dementia (VaD) can be identified before occurrence and even reverse the process. Recent studies have shown that resting-state functional magnetic resonance imaging (rsfMRI) may provide the objective basis for the diagnosis of SIVCI. This article reviews the application of rsfMRI in the diagnosis of SIVCI.

Mesoporous silica nanoparticles as drug carrier have become the new hot point in the field of biomedical application in recent years. This review focuses on the more recent developments and achievements on experimental design aspect of mesoporous silica nanoparticles with cancer diagnosis and therapy. The key advances of functionalization strategies of mesoporous silica nanoparticles with controlled release, tumor targeting and overcoming multidrug resistance are discussed in particular. Mesoporous silica nanoparticles as unique delivery systems have the potential to provide significantly a sound platform for cancer theranostic application.

Background and purpose: Neck lymph node metastasis, most of which presents in central neck compartment, is common in patients with papillary thyroid carcinoma (PTC). The objective of this study was to investigate the relationship between the number of dissected central neck lymph nodes and clinical outcome after radioactive iodine (RAI) ablation in pN1a PTC with no more than 5 lymph nodes involvement. Methods: A total of 167 PTC patients who had 1-5 proven metastatic lymph nodes according to postoperative pathological diagnosis were retrospectively analyzed, all of whom underwent total or near total thyroidectomy and central lymph node dissection. After a median follow-up period of 26 months, the clinical outcome of each patient was evaluated as excellent response (ER), indeterminate response (IDR), bio-chemical incomplete response (BIR), or structural incomplete response (SIR) according to the new American Thyroid As-sociation guidelines. The accumulative ER rate (ERn) was calculated in patients with different numbers of dissected lymph nodes (ERn was defined as the proportion of patients who achieved ER with the dissected lymph node number of ≤n). The relationship between the number of dissected central neck lymph nodes and ERn were investigated. Results: As the increase in the number of dissected central neck lymph nodes,there was also an overall increase in ERn, especially when n rose from 1 to 10. The values of ER1, ER5, ER10 and ER30 were 25.0%, 66.7%, 74.7% and 79.1%, respectively. Besides, the proportion of patients who achieved ER was higher in those with 10 or more dissected lymph nodes than in those with less than 10 (85.7% vs 73.3%, P=0.05). In the multivariate logistic regression analysis, both the dissected central lymph node number of ≥10 (OR=2.720, 95%CI: 1.052-7.033, P=0.039) and the level of preablation stimulated thyroglobulin (OR=0.955, 95%CI: 0.926-0.984, P=0.003) were shown to contribute independently to ER. Conclusion: As the increas-ing number of dissected central neck lymph nodes, the percentage of pN1a PTC patients that achieved ER after RAI ablation generally rises. In pN1a PTC patients with no more than 5 lymph nodes involvement, a central compartment dissection with 10 or more lymph nodes might help them achieve ER after RAI ablation.

Objective To investigate the effect of repetitive transcranial magnetic stimulation (rTMS) combined with eye-acupuncture on cognitive dysfunction on cognitive dysfunction in patients with traumatic brain injury. Methods From May, 2014 to June, 2016, 90 trau-matic brain injury patients with cognitive impairment were randomly divided into eye-acupuncture group (n=30), rTMS group (n=30) and combination group (n=30), who accepted eye-acupuncture, rTMS and combination of eye-acupuncture and rTMS, repectively, for eight weeks. They were assessed with Loewenstein Occupational Therapy Cognitive Assessment (LOTCA) before and after treatment. Results There was no significant difference in scores of LOTCA among three groups before treatment (F<0.523, P>0.05). The scores of LOTCA were the best in the combination group after treatment (F>3.789, P<0.05). Conclusion The combination of eye-acupuncture and rTMS is more effective in improving cognitive function after traumatic brain injury than either alone.