In recent years, various network assistant teaching platforms which have flooded into universities have been well received by the majority of teachers and students and educators. Network teach-ing platforms in oral medicine education now, especially the assistant teaching and information management have gradually risen to play a decisive role position. Combined with the characteristics of oral medical un-dergraduate course and the present situation of teaching, a preliminary practical use has been made on the new digital teaching management platform of College of Stomatology, Chongqing Medical University, and the analysis based on its advantages and disadvantages has also been made, in order to make an improvement of oral medicine teaching quality and management efficiency.

Scientific research archives management work is a basic work in the hospital work,establish hospital scientific research management information system,implementation of scientific research archives management informationization can not only realize the scientific research resources sharing,and can greatly improve the scientific quality of service and efficiency.This paper analyzes the necessity of scientific research archives information management,and the main plate and the function of information management system of scientific research archives has carried on the detailed introduction.

This article is about to discuss the basic need of oral medicine post-graduate clinical training,and analyize some elements of clinical ability to provide a reference training model for more effective and practical demand for clinical teaching methods of the post-graduate clinical.

ObjectiveTo evaluate the theoretical knowledge level of Chinese students majoring in stomatology based on the problem-based learning (PBL).MethodsThe Cochrane reviewer's handbook was followed by.Domestic published articles from 1989 -2010 were selected by computer and handwork.All these retrieved studies were controlled clinical trials related to oral theoretical education and were conducted by PBL and the traditional teaching methods.The quality of included studies was critically evaluated and the data were analyzed by the RevMan 5.0.1 software.ResultsA total of 138 articles were selected,but only 8 were included.Significant differences were found when the data were pooled(P ＜ 0.01,I2 =80％ ) and random effect model was used for meta-analysis.The results showed that comparing with the traditional teaching methods,PBL can improve the theoretical score of dental students [ MD 5.39,95％ CI(2.20,8.58)],and sensitivity analysis showed that the result was stable.ConclusionPBL can improve the theoretical score of Chinese students majoring in stomatology.However,as part of the studies are not high quality literature,the above conclusion needs to be verified by more large sample-sized,rigorously designed randomized controlled clinical trials.

The aim of the present study was to detect the transmission rate of ultrasonic low intensity pulsed ultrasound (LIPUS) through polytetrafluoroethylene (PTFE) membrane (Thickness: 0.01 mm) and Bio-Gide collagen membrane, and to provide the basis for the barrier membrane selection on the study of LIPUS combined with guided tissue regeneration (GTR). The ultrasonic (LIPUS, frequency 1.5 MHz, pulse width 200 micros, repetition rate 1.0 kHz) transmission coefficient of the two kinds of barrier membrane were detected respectively through setting ten groups from 10 to 100mW/cm2 every other 10 mW/cm2. We found in the study that the ultrasonic transmission coefficient through 0.01 mm PTFE membrane was 78.1% to 92.%, and the ultrasonic transmission coefficient through Bio-Gide collagen membrane was 43.9% to 55.8%. The ultrasonic transmission coefficient through PTFE membrane was obviously higher than that through Bio-Gide collagen membrane. The transmission coefficient of the same barrier membrane of the ultrasonic ion was statistically different under different powers (P < 0.05). The results showed that the ultrasonic transmittance rates through both the 0.01 mm PTFE membrane and Bio-Gide collagen membrane were relatively high. We should select barrier membranes based on different experimental needs, and exercise ultrasonic transmission coefficient experiments to ensure effective power.
Biocompatible Materials ; Collagen ; chemistry ; Membranes, Artificial ; Permeability ; Polytetrafluoroethylene ; chemistry ; Ultrasonics

To cultivate innovative medical students is the inevitable trend to adapt to the social de-velopment in the higher medical education. Stomatology is a subject emphasizing on practical and innovation ability, so paying attention to the cultivation of students' application ability and innovation ability in the undergraduate stage, combining theoretical study and research innovation, can lay a good foundation for the study and work. In recent years, the College of Stomatology of Chongqing Medical University has created the scientific research atmosphere, established the platform of scientific research, attempted the undergraduate tutorial system, expanded the construction of teaching resource, and involved undergraduate to take part in the scientific research practice. The college has taken many active measures to train the scientific innovation ability of undergraduates, and has obtained good results. Some undergraduates have already possessed a certain ability to find and solve problems as well as independently think. They have also enhanced their awareness of reading literature and critically accepting knowledge and improved their comprehensive quality.

OBJECTIVEThe purpose of this study was to investigate effects of static tension-stress and TGF-beta 1 on proliferation of mandibular condylar chondrocytes in vitro.

METHODSThe fourth-passage chondrocytes were harvested from the mandibular condyles of 2-week-old SD rats for this study, and a cellular static tension-stress device was used to apply stress on cells. The effects of continuous static tension-stress and/or transforming growth factor-beta 1 (TGF-beta 1) on the proliferation of mandibular condylar chondrocytes were examined using flow cytometry. The experiment was divided into two parts. The first part consisted of 100 specimens which were divided into 20 groups with different TGF-beta 1 dosage (0 ng/ml, 0.1 ng/ml, 1 ng/ml and 10 ng/ml) for 0, 6, 12, 18 and 24 hours respectively. The second part consisted of 30 specimens which were divided into six groups under continuous static tension-stress (5 kPa) and different TGF-beta 1 dosage (0.1 ng/ml, 1 ng/ml, 10 ng/ml) for 0, 6 and 12 hours. Multivariable analyses were conducted to test for associations between proliferation of mandibular condylar chondrocytes and TGF-beta 1 and/or different stresses.

RESULTSThe results showed that TGF-beta 1 had a mitogenic effect on rat mandibular condyle at the concentrations of 0.1, 1 and 10 ng/ml, and the mitogenic effects of TGF-beta 1 on condylar chondrocytes were demonstrated in 12 to 18 hours after application of stresses, and the peak of mitogenic effects appeared at 18 hour (P < 0.05). The most active mitogenesis happened in the group with continuous static tension-stress (5 kPa) combined with TGF-beta 1.

CONCLUSIONThese results prove mechanical stimulates and TGF-beta 1 in vitro could influence and regulate the growth of condylar chondrocytes.

Animals ; Cartilage, Articular ; cytology ; Cell Division ; Cells, Cultured ; Chondrocytes ; cytology ; Mandibular Condyle ; cytology ; Orthodontic Appliances, Functional ; Rats ; Rats, Sprague-Dawley ; Stress, Mechanical ; Transforming Growth Factor beta ; pharmacology ; Transforming Growth Factor beta1

OBJECTIVEThe purpose of this study was to investigate the effects of static tension-stress on proliferation of mandibular condylar chondrocytes in rats.

METHODSThe fourth-passage chondrocytes were harvested from the mandibular condyles of 2-week-old SD rats. A continuous static tension-stress was applied on the cells in vitro using a cellular static tension-stress device, and the proliferation of mandibular condylar chondrocytes were examined using a flow cytometry. The other 30 specimens in the control group were divided into six groups to examine the effects of calf serum on cellular static tension-stress without any stress. The experimental group consisted of 70 specimens which were divided into seven groups under continuous static tension-stress (5 kPa, 10 kPa) for 0 to 12 hours. Multivariable analyses were conducted to test the associations between proliferation of condylar chondrocytes and different continuous static tension stresses.

RESULTSThe results showed that the lower calf serum inhibited the proliferation of rat mandibular condylar chondrocytes. There was little effect on the proliferation of chondrocytes under continuous static tension-stress (5 kPa, 10 kPa) for 2 hours. The proliferation of mandibular condylar chondrocytes was promoted as the application time of stress was prolonged (0-10 hours in 5 kPa groups and 0-8 hours in 10 kPa groups). The maximal proliferation appeared, when the condylar chondrocytes were cultured under 5 kPa continuous static tension-stress for 10 hours, and 8 hours under 10 kPa stress (P < 0.05). The proliferation of cells in the 5 kPa group was more obvious than in the 10 kPa group (P < 0.05).

CONCLUSIONThe data prove that mechanical stimulates in vitro can influence and regulate the growth of condylar chondrocytes. It provides experimental evidence for advanced study on cellular mechanical research in functional orthopedics.

Animals ; Animals, Newborn ; Cartilage, Articular ; cytology ; Cell Division ; Cells, Cultured ; Chondrocytes ; cytology ; Mandibular Condyle ; cytology ; Orthodontic Appliances, Functional ; Rats ; Rats, Sprague-Dawley ; Stress, Mechanical

A three-dimensional finite element model of the cell culture membrane was developed in the culture device under tension state made by us. The magnitude of tension and the displacement distribution in the membrane made of silicon rubber under different hydrostatic load were obtained by use of FEM analysis. A comparative study was made between the numerical and the experimental results. These results can serve as guides to the related cellular mechanical research.
Animals ; Biomechanical Phenomena ; Cell Culture Techniques ; Finite Element Analysis ; Imaging, Three-Dimensional ; Membranes, Artificial ; Rats ; Rats, Sprague-Dawley ; Silicone Elastomers

Objective:To understand and compare the online learning effect of students majoring in stomatology and dental technology under the background of COVID-19 epidemic prevention and control, and to analyze the advantages and challenges of online teaching, so as to provide reference for the reform of teaching mode of stomatology education.Methods:A questionnaire survey on online learning was carried out among 267 students majoring in stomatology and 92 students majoring in dental technology in Chongqing Medical University. The results were statistically analyzed by SPSS 21.0, and chi-square test or rank sum test was used to count the data.Results:Computers and mobile phones are the main tools for students to study online. 52.92% of students used computers and 38.72% used smart phones. About 80% of the students said that they could adapt to online learning, and there was no statistical difference between the students of two majors. The online learning time of students majoring in stomatology was mainly 4-6 hours, while that of students majoring in dental technology was 2-4 hours, with statistical significance. However, the latter were more likely to ask questions to teachers than the former, and the proportion of students who often asked questions to teachers was 29.35% and 20.60%, respectively, with statistical significance. A small number of students of both majors failed log on the platform to learn and complete all the teaching materials on time. More than 50% of the students thought that online teaching was not as effective as offline teaching, and offline teaching was more conducive to mastering curriculum knowledge, without statistical differences between the students of two majors. They thought that the unsmooth learning platform, poor network conditions at home, and insufficient teaching materials prepared by teachers were the main reasons that affected the online learning effect.Conclusion:The online teaching is an important and also an advisable way to maintain teaching activities during the epidemic prevention and control of COVID-19. It will be the direction of further research on the education and teaching reform to make full use of information technology, combine the advantages of online teaching and traditional classroom teaching, and actively explore the blended teaching mode from the perspective of specialty and course characteristics.