Practical exploration of paperless medical records for COVID-19 : Tongji Hospital as an example / 中华医院管理杂志

December 2019 witnessed the outbreak of COVID-19 in Wuhan city and its rapid spread to other parts of China, and overseas as well. Tongji Hospital, as a designated hospital for treatment of critically ill patients, shoulders the diagnosis and treatment tasks of numerous critically ill patients of such a disease. For the purpose of handling their medical records and effectively preventing the nosocomial infection of the disease, the hospital puts in place both the electronic signature system of patients based on a Wechat applet and a paperless medical record total solution based on the data center. These measures overcome the challenges incurred by patients’ signature on paper-based records and medical records archiving during the epidemic. On the other hand, they can not only downsize the paper-based medical records, minimize the risk of infection caused by paper-based medical records via contacts, but also effectively save the hospital of its operating costs and improve its efficiency of clinical work.

Comparison between one-step and two-step space closing methods of sliding mechanics using three-dimensional finite element / 中华口腔医学杂志

<p><b>UNLABELLED</b>To construct a three-dimensional finite element model comparing between one-step and two-step methods in torque control of anterior teeth during space closure.</p><p><b>METHODS</b>Dicom image data including maxilla and upper teeth were obtained though cone-beam CT. A three-dimensional model was set up and the maxilla, upper teeth and periodontium were separated using Mimics software. The models were instantiated using Pro/Engineer software, and Abaqus finite element analysis software was used to simulate the sliding mechanics by loading 1.47 Nforce on traction hooks with different heights (2, 4, 6, 8, 10, 12 and 14 mm, respectively) in order to compare the initial displacement between six maxillary anterior teeth (one-step method) and four maxillary anterior teeth (two-step method).</p><p><b>RESULTS</b>When moving anterior teeth bodily, initial displacements of central incisors in two-step method and in one-step method were 29.26 × 10⁻⁶ mm and 15.75 × 10⁻⁶ mm, respectively. The initial displacements of lateral incisors in two-step method and in one-step method were 46.76 × 10(-6) mm and 23.18 × 10(-6) mm, respectively. Under the same amount of light force, the initial displacement of anterior teeth in two-step method was doubled compared with that in one-step method. The root and crown of the canine couldn't obtain the same amount of displacement in one-step method.</p><p><b>CONCLUSIONS</b>Two-step method could produce more initial displacement than one-step method. Therefore, two-step method was easier to achieve torque control of the anterior teeth during space closure.</p>

Distal movement of the mandibular dentition in the treatment of patients with Class III skeletal pattern / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To evaluate the outcome of patients with skeletal Class III malocclusion treated with extraction of mandibular third molars and distalization of molars using implant anchorage combined with MBT appliance.</p><p><b>METHODS</b>Fifteen patients (mean age 24.0 ± 5.8) with skeletal Class III malocclusion were selected. The mandibular third molars were extracted and the mandibular molars were moved distally using implant combined with MBT appliance. Cephalometric analysis was carried out before and after treatment.</p><p><b>RESULTS</b>After active treatment, ANB, Wits distance, AB-NP and the distance between upper and lower lip position to SnPg' increased by 1.65° ± 1.04°, (4.39 ± 1.93) mm, 3.20° ± 1.61° and (1.13 ± 0.99) mm, respectively. The differences were statistically significant (P < 0.05).</p><p><b>CONCLUSIONS</b>The skeletal Class III patients in the permanent dentition could be treated successfully with extraction of mandibular third molars and distalization of mandibular molars using implant anchorage combined with MBT appliance. The soft-tissue profile was improved.</p>

Comparative study on platelet-rich fibrin and platelet-rich plasma in repair of rabbit parietal bone defect / 中华创伤杂志

Objective To compare the osteogenesis effect of platelet-rich fibrin (PRF) and platelet-rich plasma (PRP) and investigate the methods of repairing bone defect with PRF.Methods Four defects measuring 7 mm in diameter were made in the parietal bone of 16 New Zealand white rabbits.The defects named A,B,C,and D and were filled with PRF,PRF-mixed Bio-Oss (BO),PRP-mixed BO,and PRP separately.Every four rabbits were sacrificed at postoperative 2,4,8,and 12 weeks and defects were examined grossly,radiographically,and histologically.Besides,bone mineral density and bone trabecular area were determined and expressed as gray-scale values.Results Newly regenerated bone appeared at all defect areas at postoperative 2 weeks.Thereafter,more bone formations were observed over time and area B demonstrated the best bone healing followed by area C,A,and D in succession.Bone trabecular area in areas A,B,C,and D was 10.95 ± 0.58,15.45 ± 0.79,10.22 ± 0.43,and 6.58 ± 0.64 at postoperative 2 weeks with significant differences in pair comparison (F =22.869,P ＜0.01),followed by some increase at postoperative 4 and 8 weeks.Whereas,bone trabecular area in areas A,B,C,and D increased largely at postoperative 12 weeks (35.09 ± 0.58,59.44 ± 0.60,50.75 ± 1.56,and 30.94 ± 1.19) and showed significant difference when compared in a pair (F =1 002.904,P ＜ O.01).Conclusion PRF is superior to PRP in promoting bone formation,but a much better effect of PRF/BO composite is observed in bone repair.

Effect of temperature on physiologic indexes, bulb yielding and total alkaloids contents of Fritillaria cirrhosa / 中国中药杂志

<p><b>OBJECTIVE</b>To study the physiologic indexes, yield and the contents of alkaloids of Fritillaria cirrhosa D. Don under different temperature.</p><p><b>METHOD</b>The growth temperatures (15, 20, 25, 30 degrees C) of F. cirrhosa were controlled by using artificial climate, the growth was observed, the contents of chlorophyll a and b, soluble sugar, MAD, proline of the leaves of F. cirrhosa were tested, and the yield and the alkaloids content of the bulbs were analyzed.</p><p><b>RESULT</b>The growth period of F. cirrhosa under 15, 20 degrees C were appropriately extended. The difference of the content of leaves chlorophyll b under four temperatures and the contents of total chlorophyll and chlorophyll a under 15, 20, 30 degrees C were not significant. The contents of soluble sugar, MAD and proline of leaves and the growth ratio, dry weight and content of alkaloids of bulb increased with the temperature decrease.</p><p><b>CONCLUSION</b>Higher temperature is not suitable for the growth of F. cirrhosa. Under the relatively lower temperature, the growth period of F. cirrhosa extended, the bulb can grow properly, and the content of alkaloid increased. F. cirrhosa can improve its cold tolerance by increasing the content of proline and soluble sugar, and it also can maintain the normal content of chlorophyll under the lower temperature.</p>