ABSTRACT
Objective To evaluate the effect of orthopedic clinical practice teaching design based on WeChat platform.Methods From September 2015 to August 2017,62 undergraduate students majoring in clinical medicine in the department of orthopedics of our hospital were selected as the study subjects,and randomly divided into the experimental group and the control group.With 31 interns in each group,the control group implemented the traditional teaching method according to the requirements of the syllabus.The experimental group was attached to WeChat production,push notification and communication of related courses on the basis of the traditional teaching methods.At the end of the teaching,the theoretical and operational tests,the comprehensive quality assessment,the evaluation for teachers' teaching work and the questionnaire survey of the two groups were administrated to evaluate the teaching effect.SAS 9.0 was used to do t-test and CMH-chi-square test.Results The score of the experimental group in the theoretical test [(87.52 ± 5.45) vs.(82.61 ± 7.70)],operational test [(94.36 ± 2.60) vs.(92.26 ± 3.01)],comprehensive quality assessment [(95.94 ± 1.61) vs.(93.42 ± 2.81)] and the evaluation for teachers' teaching work [(94.58 ± 2.06) vs.(92.55 ± 1.69)] were better than those of control group,and there were statistically significant differences.P values were 0.005,0.005,0.000 and 0.000 respectively.The questionnaire survey results show that the experimental group was better than the control group in learning motivation (P=0.035),literature study (P=0.013),curriculum arrangement (P=0.007),teaching satisfaction (P=0.029) and professional recognition (P=0.040).Conclusions The clinical practice teaching method based on WeChat platform is effective and feasible to the orthopedic medical students,which is helpful to improve students' learning initiative and master effective learning strategies.The application is worth promoting.
ABSTRACT
Objective To investigate the structure and biomechanical property differences in different regions of the femoral head for elderly patients with femoral neck fractures,and to study its influence on internal fixation for fracture.Methods Twenty femoral head specimens were collected from elderly patients with femoral neck fracture after joint replacement.The femoral head was divided into 3 parts (lateral,inferior and medial region) with reference to anatomical markers on surface of the femoral head.After the position and drilling direction of the ring drill were determined,a circular drill was used to obtain the cylindrical cancellous bone columns with 10 mm in diameter and 10 mm in height.The data of cancellous bone columns in different regions were analyzed by Micro-CT scanning system,including bone volume fraction (BVF),trabecular space (Tb.Sp),trabecular thickness (Tb.Th),the number of trabecular number (Tb.N),the bone surface volume ratio (bone surface/bone volume,BS/BV),structural model index (SMI).Mechanical property differences of bone tissues in different regions were calculated by micro-finite element analysis.Results Bone mass in the elderly osteoporotic femoral head decreased,and there were significant differences in bone microstructure and mechanical properties in different regions of the femoral head.Bone microstructure and mechanical properties in medial region were obviously superior to those in lateral and interior region.Conclusions The bone structure and mechanical strength in medial region of the femoral head are obvious superior to those in lateral and inferior regions.The position for internal fixation should be fully considered during treatment of osteoporotic femoral neck fracture in clinic.