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Objective To study mechanical properties of the novel micro-movement elastic implant of distal tibiofibular syndesmosis in dorsiflexion position.Methods A combination of simulation and experiment was used. The normal ankle dorsiflexion model, the bone nail repaired model and the micro-movement elastic implant repaired model were established by using Mimics and CT data. Besides, ANSYS Workbench was used for finite element analysis. Mechanical experiments on lower limb specimens were conducted on Instron E10000 mechanical test instrument, and five sets of experimental data were measured and analyzed.Results Mechanical properties of the micro-movement elastic implant repaired model were closer to those of the normal ankle dorsiflexion model, but stress of the micro-movement elastic implant repaired mode was greater than that of the bone nail repaired model. The results of two-sample heteroscedasticity t test indicated that there was no significant difference in resistance torque between the micro-movement elastic implant repaired model and the normal ankle dorsiflexion model.Conclusions For dorsiflexion position, repairing mechanical properties of the novel micro-movement elastic implant are much better than those of the bone nail, and there is still room for optimizing the micro-movement elastic implant.
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The aim of this study was to examine the relationship between deep squatting or ROM of lower limbs, and physical function in typically developing children. 337 elementary school students were recruited for this study. The subjects were performed to squat with their heels down and then were divided into 2 groups: possible squatting and impossible squatting. ROM of lower limbs (hip flexion, knee flexion, and ankle dorsiflexion), circumference of leg, standing long jump, the five-repetition sit-to stand test (FTSST) and a standing test were analyzed. Unpaired t-test or Mann-Whitney U test was used for the two-group comparison. Logistic regression analysis was used to determine variables associated with squatting, and multiple regression analysis was used to determine variables associated with physical function. The rate of impossible squatting was 11.9%. The ROM of the lower limbs was significantly decreased in the impossible group. Multiple regression analysis showed that the ankle dorsiflexion ROM and BMI were correlated with squatting. In physical function, the FTSST and standing test were correlated with squatting. However, in the multiple regression analysis squatting did not significantly affect physical function. In this study, ROM of the ankle dorsiflexion and BMI affected the squatting. It was suggested that the squatting might be useful as a screening for ankle dorsiflexion ROM.
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Objective:To compare the effect of two kinds of methods inducing ankle dorsiflexion on ankle dorsiflexion function for stroke patients. Methods:From September, 2016 to September, 2018, 60 patients with disorders of ankle active dorsiflexion after stroke were randomly divided into groups A, B and C, who accepted routine rehabilitation, tapping-zone therapy and tapping Qiuxu acupoint (GB40), respectively, for six weeks. They were assessed with three-dimensional gait analysis and surface electromyography before and after treatment. Results:The range of motion of the affected ankle, the peak torque of ankle and integrated electromyography of tibialis anterior muscle increased after treatment (t > 2.318, P < 0.05), and it ranked from best to worst as group C, group B and group A (P < 0.05). Conclusion:Both tapping-zone therapy and tapping Qiuxu may promote the recovery of ankle dorsiflexion in stroke patients, and the latter seems better.
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PURPOSE: This study aimed to evaluate the changes in dorsiflexion and balance following proximal and distal tibiofibular joint manipulation in individuals with a history of lateral ankle sprain (LAS). METHODS: Fifteen participants with a history of unilateral LAS, exhibiting a restriction in ankle dorsiflexion were included in this study. LAS ankle received a manipulation to the proximal and distal tibiofibular joint, while the opposite control ankle received no manipulation intervention. The outcome measures included ankle dorsiflexion and balance. Ankle dorsiflexion was measured using weight-bearing lunge test. Static and dynamic balances were measured using the overall, anterioposterior, and mediolateral balance index via the biodex balance system. Measurements were obtained prior to and following manipulation. RESULTS: This study showed that ankle dorsiflexion and dynamic balance were improved following the manipulation compared to those prior to the manipulation (p0.05). CONCLUSION: The joint manipulation technique applied to the ankle of those with a history of LAS appears to improve ankle dorsiflexion and dynamic balance. This suggest that a manipulation to the proximal and distal tibiofibular joint could be provided as preliminary data regarding the prophylactic effects of recurrent LAS.
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Ankle Injuries , Ankle , Joints , Lung , Outcome Assessment, Health Care , Weight-BearingABSTRACT
Although decreased dorsiflexion range of motion (DROM) is linked to ankle inversion sprains and other lower limb injuries, the mechanisms underlying these links are not well understood. The purpose of this study was to examine the relationships between DROM and the ankle dorsiflexion and inversion, and the foot progression angles during a sidestep cutting maneuver. Nineteen healthy subjects participated in this study. The loaded DROM in a flexed- knee position was measured. The foot and ankle motions were assessed during the sidestep cutting maneuver using a 3D motion analysis system. The low DROM group displayed smaller dorsiflexion and inversion angles, and greater external foot rotation, and performed the task using a significantly greater percent of their DROM than the high DROM group during the sidestep cutting maneuver. In addition, the smaller DROM was associated with smaller dorsiflexion angles, greater external foot rotation, and greater maximum dorsiflexion angles as a percentage of DROM during the sidestep cutting maneuver. The decreased DROM may prevent the ankle from becoming stable during the sidestep cutting maneuver, therefore the ankle may be vulnerable position to an inversion sprain. The kinematic patterns displayed by individuals with a decreased DROM may be a compensatory strategy for dorsiflexion deficits, which may be associated with ankle and knee injuries.
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@#Objective To investigate the effect of electromyographic biofeedback therapy on upper extremity function in children with cerebral palsy(CP).Methods 20 CP children were randomly divided into the treatment group and control group with 10 cases in each group.All children of two groups were treated with Bobath therapy and regularly training of activities of daily living(ADL),physical therapy and occupational therapy,while those of the treatment group were given electromyographic biofeedback therapy with EMG-electrical stimulation.The active range of motion(AROM)of wrist dorsiflexion was evaluated and upper extremity function was assessed by Fugl-Meyer Assessment(FMA).Results The upper extremity function of all children in two groups improved and the effect of the children of the treatment group were superior to those of the control group(P<0.05).Conclusion The electromyographic biofeedback therapy with EMG-electrical stimulation can improve the upper extremity function of CP children.
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@#Objective To study the factors which influence persistence time of pathologic reflexes and the most sensitive locus that eliciting them.Methods106 patients with first pyramidal tract injured were elicited Babinski sign once a day.The time and locus of hand-motion of examiner,the time and angle of hallux-dorsiflexion,the muscle strength of the patients were recorded.Results and ConclusionThe lower the muscle strength be,the longer the hallux-dorsiflexion persist,the larger the angle of hallux-dorsiflexion be,the nearer the sensitive locus to heel.
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PURPOSE: We report a case that iatrogenic dorsiflexion deformity after hallux valgus surgery treated successfully with crescenteric plantar flexion metatarsal osteotomy. MATERIALS AND METHODS: 43 years old female who suffered from left fore foot pain and deformity after hallux valgus surgery was evaluated. RESULTS: Preoperatively she did not put on ordinary shoes and had had persistent pain and discomfort on 1st metatarsal area. She also had a callus on plantar surface of 2nd metatarsal head. Simple AP and Lateral x-ray identified that 1st metatarsal bone had a 23 degree dorsiflexion deformity. For correction of deformity, plantarflexion crescenteric osteotomy was performed on proximal 1st metatarsal area. After operation, All of symptom eliciting patient was gone and 43 points of AOFAS scale preoperatively improve 100 points and the patient very satisfied. Post operative x-ray was showing complete correction of deformity. CONCLUSION: As a treatment of iatrogenic dorsiflexion deformity after hallux valgus surgery, the crescenteric plantar flexion osteotomy can be good and safe modality for correction.