Objective:To investigate the mechanism of the effect of tonifying kidney recipes(TKR) on osseointegration of the Titanium Implants by established animal model of osteoporosis rats.Methods:Fifty-four female SD rats were randomly divided into three groups:A:Sham group, B:ovariectomy(OVX) group C:OVX+TKR group. After operation, tonifying kidney recipes was given orally in C group. The results were observed by bone histomorphometry. Results:Trabeculae area (Tb?Ar,%), trabeculae width (Tb?Wi), combined bone lamella width (CBLW), osteoblast number (OB?N) in C group were significantly increased compared with B group (P

Bilateral mandibular first molars of 36 rabbits were extracted.The tooth extraction wounds were treated by:platelet-rich fibrin +acellular dermal matrix(group A),platelet-rich fibrin(group B),acellular dermal matrix (group C) and without treatment (group D,the control) (n =9) respectively.The measurments of alveolar bone height and width showed that there were no significant differences among groups at different times(P ＞ 0.05).Bone histomorphometry showed that at the 2th and 4th week,the best result was found in group A(P＜0.01).While,at the 8th week,the result of group A was still better than that of other 3 ones (P ＜ 0.01),but group B and C showed no significant difference(P ＞ 0.05).The combination of PRF and ADM shows the most significant effect.

Taking Shinshu University of Japan for example,we attempted to introduce the postgraduate clinical education system for new oral surgeons by analyzing the management of clinical training programs,studies of oral maxillofacial and associated medicine,and practices of scientific research in the department of oral surgery.Their experiences may be useful for us to improve our medical continuing education for young oral surgery residences.

Objective: To understand the effects of different expansion ways on collagen and actin of skin and to provide an experiment foundation for the suitable expansion method clinically. Methods: The rabbits were divided into five groups. The expanders were embedded in experimental group. The sirius-red specific staining method was applied to observe the changes of type I collagen and type III collagen and their proportion. Immunochemistry method was used to detect the expression of actin. Results: 1: In group A, B and C, type I collagen arranged turbulently and was thicker and type III collagen decreased relatively at earlier maintaining period. After 4 week, type I collagen arranged regularly and type III collagen was relatively increased. 2: Comparisons of the area about type I, III collagen: At the same maintaining period, there were no significant difference among the group A,B and C. With the extension of maintaining period, the area of type I, III collagen increased gradually, but there was inclined to stabilize at the fourth week in group A, B and at the third week in group C. Comparison of the proportion of collagen I and collagen III: There were significant difference between group A, B and group D, but no significant difference was observed after the fourth week. There were significant difference between group C and control group, but no significant difference was observed after three week. 3. With the extension of maintaining period, the positive expression rates of actin decreased gradually in group A, B, C. At the same maintaining period, significant difference were observed among group A, B, C. The positive expression rates of actin in group C were lower than that of group A at the same maintaining period. Conclusion: The repeated rapid expansion can not only shorten the clinical period but also promote the quality of skin flap. It is a safe and feasible method in clinic.

Medical ethics is the standard ofbehavior toadjust the relationship between medical personnel and patients,medical personnel,medical personnel and society.It is a general social morality in medical field in special performance.Teachers should carry through the ethics education to the end,making students smoothly enter society from the school,cultivating good ethics during the process of learning basic knowledge of oral cavity,and developing high-quality oral physicians for our country.

Objective:To study the influence of different culture conditions on charcic and inhibition activity of nature killer cells ( NK) ,whether to join the modified K562 cells with IL-6 cytokine.Methods:According to the 5′end of the human IL-6 cDNA sequence,PCR primers designed to amplificate,express and transfect K562 cells cDNA library as a template for DNA.Genetic modified K562 cells as stimulating cells were prepared by expressing IL-6.To extract peripheral blood mononuclear cells( PBMC) from human peripheral blood.PBMC were explanted by genetic modified K562 stimulated.The expansion was initiated by CO-culture of PBMC and irradiate genetic modified K562 cell.The number of NK cell increased by directed induced generation of genetic modified K562 cell.Immunophenotypic analysis of NK cell surface markers was performed by flow cytometry (FCM).51Cr release assay was employed to measure the specific lysis skilling of NK cell target K562 cells.Results:We have constracted genetic modified K562 cells by genetic engineering.As stimulated cell added into the PBMC,an average of 760 ±18 fold expansion of CD56+CD16+CD3-cells was observed after 3 weeks of co-culture system.The NK cells population could proliferated more 91%±2% after expansion comparing with 6%± 0.4%in PBMC before expansion by FCM.The cytotoxical activity of NK cells which was induced by genetic modified K562 cell was the strongest than induced by IL-6 cytokine alone.The expanded NK cells lysed 92%±2% of K562 targets in a 5∶1 effector to target ratio.In this case,the NK cells induced by genetic modified K562 cells against tumor cells was more lethal.Conclusion:PBMC based in vitro expansion of natural killer cells was set up by genetic modified K562 cells.The cytotoxicity of NK cells was the strongest induced by genetic modified K562 cell treated.These results had important guiding significance for the the NK large number of amplification and used in clinical.

Objective:To investigate the current situation of the use of transjugular intrahepatic portosystemic shunt (TIPS) for portal hypertension, which should aid the development of TIPS in China.Methods:The China Portal Hypertension Alliance (CHESS) initiated this study that comprehensively investigated the basic situation of TIPS for portal hypertension in China through network research. The survey included the following: the number of surgical cases, main indications, the development of Early-TIPS, TIPS for portal vein cavernous transformation, collateral circulation embolization, intraoperative portal pressure gradient measurement, commonly used stent types, conventional anticoagulation and time, postoperative follow-up, obstacles, and the application of domestic instruments.Results:According to the survey, a total of 13 527 TIPS operations were carried out in 545 hospitals participating in the survey in 2021, and 94.1% of the hospital had the habit of routine follow-up after TIPS. Most hospitals believed that the main indications of TIPS were the control of acute bleeding (42.6%) and the prevention of rebleeding (40.7%). 48.1% of the teams carried out early or priority TIPS, 53.0% of the teams carried out TIPS for the cavernous transformation of the portal vein, and 81.0% chose routine embolization of collateral circulation during operation. Most of them used coils and biological glue as embolic materials, and 78.5% of the team routinely performed intraoperative portal pressure gradient measurements. In selecting TIPS stents, 57.1% of the hospitals woulel choose Viator-specific stents, 57.2% woulel choose conventional anticoagulation after TIPS, and the duration of anticoagulation was between 3-6 months (55.4%). The limitation of TIPS surgery was mainly due to cost (72.3%) and insufficient understanding of doctors in related departments (77.4%). Most teams accepted the domestic instruments used in TIPS (92.7%).Conclusions:This survey shows that TIPS treatment is an essential part of treating portal hypertension in China. The total number of TIPS cases is far from that of patients with portal hypertension. In the future, it is still necessary to popularize TIPS technology and further standardize surgical indications, routine operations, and instrument application.