Application of WeChat for Family Rehabilitation after Anterior Cruciate Ligament Reconstruction / 中国康复理论与实践

Objective To apply the WeChat in family rehabilitation after anterior cruciate ligament (ACL) reconstruction. Methods 126 patients accepted ACL reconstruction using quadrupled semitendinosus and gracilis tendons were divided into observation group (n=69) and control group (n=57). The control group received conventional rehabilitation program, and the observation group joined the WeChat group. They were assessed with knee range of motion (ROM), knee stability test, thigh perimeter, Lysholm score and the International Knee Docu-mentation Committee (IKDC) score 3 and 6 months after operation. Results There was a significant difference between groups in ROM of knee flexion (P0.05). There was no significant difference in thigh perimeter 3 months after operation, but it was significant 6 months after operation. There was significant difference in Lysholm score and IKDC score (P0.05). Conclusion Direction of rehabilitation with the WeChat Group can signifi-cantly improve the compliance, accelerate the rehabilitation process and reduce complications in patients after ACL reconstruction.

Application ofWeChat for Family Rehabilitation after Anterior Cruciate Ligament Reconstruction / 中国康复理论与实践

@#Objective To apply the WeChat in family rehabilitation after anterior cruciate ligament (ACL) reconstruction. Methods 126 patients accepted ACL reconstruction using quadrupled semitendinosus and gracilis tendons were divided into observation group (n=69) and control group (n=57). The control group received conventional rehabilitation program, and the observation group joined the WeChat group. They were assessed with knee range of motion (ROM), knee stability test, thigh perimeter, Lysholm score and the International Knee Documentation Committee (IKDC) score 3 and 6 months after operation. Results There was a significant difference between groups in ROM of knee flexion (P<0.05) 3 and 6 months after operation, but not in ROM of knee extension (P>0.05). There was no significant difference in thigh perimeter 3 months after operation, but it was significant 6 months after operation. There was significant difference in Lysholm score and IKDC score (P<0.05), but not in the joint stability (P>0.05). Conclusion Direction of rehabilitation with the WeChat Group can significantly improve the compliance, accelerate the rehabilitation process and reduce complications in patients after ACL reconstruction.

Effects of exercise of different intensity on early repair of full-thickness articular cartilage defects and expressions of MMP-3 and TIMP-1 in rats / 南方医科大学学报

<p><b>OBJECTIVE</b>To evaluate the effects of treadmill running exercise of different intensity on early repair of full-thickness defects on the patellofemoral articular surface and the changes in the expressions of matrix metalloproteinase-3 (MMP-3) and tissue inhibitor of metalloproteinase-1 (TIMP-1) in SD rats.</p><p><b>METHODS</b>Twenty-four male SD rats with full-thickness defects on the patellofemoral articular surface were randomly assigned into sedentary control (SED) group and low-, moderate- and high-intensity running groups (LIR, MIR, and HIR groups, respectively). The running groups were trained on treadmill for 6 consecutive weeks. Blood samples were collected to detect serum MMP-3 and TIMP-1 levels using ELISA before and after the experiment, and the femoral trochlea were collected to assess tissue repair by gross appearance scoring and O Driscoll histological scoring with Safranine O-Fast Green staining and Toluidine blue staining.</p><p><b>RESULTS</b>In rats in SED group, the defect was filled with hyaline articular cartilage-like tissues, as compared to fibrous tissues in LIR and MIR groups and subchondral bone damage in HIR group. The SED group scored the highest and HIR group the lowest among the 4 groups in gross appearance scoring and O Driscoll histological scoring. No significant differences were found in MMP-3 or TIMP-1 levels among the groups before training (P>0.05), but after 6 weeks of training, serum MMP-3 and TIMP-1 levels differed significantly among the 4 groups (P<0.05), and all the 3 running groups had a significantly higher MMP-3 level than the control group (P<0.05). After the 6-week training, TIMP-1/MMP-3 ratio was significantly higher in SED group than in the 3 running groups, and was the lowest in HIR group.</p><p><b>CONCLUSION</b>Both low- and moderate-intensity exercise failed to promote resurfacing of full-thickness cartilage defects on the patellofemoral articular surface in rats, and high-intensity exercise even induces subchondral bone damage. The expression of MMP-3 and TIMP-1 is related to exercise, and the TIMP-1/MMP-3 ratio reflects the extent of tissue repair.</p>

Correlation between talonavicular joint movement and changes of the medial longitudinal arch / 南方医科大学学报

<p><b>OBJECTIVE</b>To explore the characteristics of the talonavicular joint movement in vivo and its effects on changes of the medial longitudinal arch.</p><p><b>METHODS</b>Foot CT images in the initial position (neutral position) and terminal position (maximum varus-adduction-dorsiflexion position) were acquired from 9 cases (5 healthy volunteers, including 4 males and 1 female) during foot varus-adduction-dorsiflexion motion. Based on the principle of rigid body kinematics, the CT data were reconstructed and analyzed with Mimics and Geomagic reverse engineering software. The changes of the talonavicular joint in three-dimensional in 6 degrees of freedom were calculated to determine its correlation to the medial longitudinal arch angle.</p><p><b>RESULTS</b>During foot varus-adduction-dorsiflexion motion, the talonavicular joint underwent varus-adduction-plantarflexion motion, with the motion range of 38.82∓5.98° in varus, 19.71∓6.33° in adduction, and -5.09∓6.89° in plantarflexion. During talonavicular joint motion, the medial shift of the navicular was significantly correlated to the changes of foot medial longitudinal arch (P<0.05).</p><p><b>CONCLUSION</b>Digital technology can solve the problem of measurement of talonavicular joint three-dimensional motion in vivo. Though as a ball-and-socket joint, the talonavicular joint mainly rotates around the sagittal axis, and its movement is a major factor to cause changes of foot medial longitudinal arch.</p>