Foot Loading Analysis of Intraarticular Tibia Pilon Fracture

BACKGROUND: Although pilon fractures are rare, they are important for orthopedic surgeons because of the difficulty of treatment and adverse effects on gait function. The aim of the study to evaluate the relationship between the reduction quality of the fracture, functional results, ankle arthrosis and plantar pressure distribution in patients with tibia pilon fractures. METHODS: In this study, a total of 62 patients treated for an intraarticular pilon fracture in our clinic between January 2015 and January 2019 were evaluated retrospectively. Postoperative reduction qualities of the patients were evaluated with the Ovadia-Beals criteria, ankle functional scores with the Teeny-Wiss score, and ankle arthrosis with the Takakura classification. In the last follow-up of the patients, foot loading analysis was performed and the results of the patients were evaluated for their relation with postoperative reduction quality, ankle functions and ankle arthrosis. RESULTS: There were 62 patients (50 men and 12 women). The average age was 43.3 years (range 19-78). The mean follow-up was 34.3 months (range 24 - 58). The mean Ovadia-Beals score was 12.35 {plus minus} 4.6 in the postoperative plain radiographs of the patients; the mean Teeny-Wiss score in the last follow-up was 76.82 {plus minus} 17.69, and the Takakura score was 1.47 {plus minus} 1.35. Based on the pedobarographic measurements, 47.58% of the patients put weight on the anterior and 52.42% on the posterior of the foot in the anteroposterior plane. In the mediolateral plane, 42.15% loaded on the medial of the ankle and 57.85% loaded on the lateral of the foot. CONCLUSION: Intra-articular tibia pilon fractures can be demonstrated by lateralization of the walking axis and changes in gait patterns and can be associated with clinical outcome.

Effect of Hallux Valgus Correction with Kinesiology Taping on Hindfoot Position. Pilot Study

Background. Hallux valgus is the most common deformity of the forefoot. It has a multifactorial aetiology, with hindfoot valgus considered one of its causes. The aim of this study was to evaluate hindfoot position and loading pattern after a treatment of Kinesiology Taping (KT) for the mechanical correction of hallux valgus. Material and methods. The study involved 25 feet with hallux valgus deformity and hindfoot valgus. The hallux valgus angle (HVA) and hindfoot angle were assessed with a 3D scanner. Hindfoot loading pattern was examined with a baropodometric platform while standing and during gait. Measurements were taken on the following three occasions: before and immediately after KT placement as well as after a month of taping. Results. The KT treatment had a significant influence on the hindfoot angle (p<0.001) and HVA (p<0.001) measured while standing and on lateral heel loading in dynamic conditions during gait (p<0.01). Conclusions. 1. KT decreased HVA and improved hindfoot position while standing in the pilot study participants. 2. KT exerted a corrective influence on the foot loading pattern in patients with hallux valgus and hindfoot pronation. 3. The foot position correction and normalisation of foot loading achieved in the pilot study provide a basis for further research on KT effectiveness in patients with hallux valgus and hindfoot pronation.

Analysis of Foot-Ankle-Leg Injuries in Various Under-Foot Impact Loading Environments with a Human Active Lower Limb (HALL) Model

Lower limb injuries caused by under-foot impacts often appear in sport landing, automobile collision, and anti-vehicular landmine blasts. The purpose of the present study was to evaluate a foot-ankle-leg model of the Human Active Lower Limb (HALL) model, and used it to investigate lower leg injury responses in different under-foot loading environments to provide a theoretical basis for the design of physical dummies adapted to multiple loading conditions. The model was first validated in allowable rotation loading conditions, like dorsiflexion, inversion/eversion, and external rotation. Then, its sensitivity to loading rates and initial postures was further verified through experimental data concerning both biomechanical stiffness and injury locations. Finally, the model was used to investigate the biomechanical responses of the foot-ankle-leg region in different under-foot loading conditions covering the loading rate from sport landing to blast impact. The results showed that from -15&#176; plantarflexion to 30&#176; dorsiflexion, the neutral posture always showed the largest tolerance, and more than 1.5 times tolerance gap was achieved between neutral posture and dorsiflexion 30&#176;. Under-foot impacts from 2 m/s to 14 m/s, the peak tibia force increased at least 1.9 times in all postures. Thus, we consider that it is necessary to include initial posture and loading rate factors in the definition of the foot-ankle-leg injury tolerance for under-foot impact loading.

Assessment of the Foot’s Longitudinal Arch by Different Indicators and Their Correlation with the Foot Loading Paradigm in School-Aged Children: A Cross Sectional Study

Background: There are numerous studies assessing the morphological structure of the foot, but there is a notable scarcity of those focused on juxtaposing various longitudinal arch indices with foot loading paradigm. The present study aimed to determine the overall reliability, diagnostic accuracy of respective variables, and their correlation with the foot loading paradigm. Methods: The study group consisted of 336 children, aged 10–15 years (girls 49.1% and boys 50.9%). The morphological structure of the plantar part of the foot in static conditions was assessed with the aid of a 2D podoscan. Individual foot loading paradigm in static conditions was assessed making use of the FreeMed platform. Results: Staheli (SI), Chippaux–Smirak (CSI), and Sztriter–Godunow (KY) indices were strongly correlated with each other (ρ > 0.84, p < 0.001). Own research corroborated an increased pressure of hollow feet, as assessed by the SI, CSI, and KY indices, on the forefoot and the hindfoot, foot zones B, E, F; these correlations being statistically significant. The results yielded by the present study also indicate an increased pressure on the metatarsal, and foot zones C, D of the flat feet. Conclusions: Flatfootedness is not believed to be a common deformity among children and adolescents. The SI, CSI, and KY indices were found to be strongly correlated, as well as proved reliable in assessing the foot’s longitudinal arch.

Influence of orthopedic shoes on the indicators of the interzonal load distribution on the foot when walking patients with cerebral palsy

BACKGROUND: Clinical observations of patients with spastic forms of cerebral palsy and surveys showed the most commonly used technical rehabilitative device of this patient contingent are orthopedic shoes. However, almost no clinical and instrumental studies examine the effect of such shoes on the walking characteristics of patients with cerebral palsy (CP). AIM: This study aims to estimate the effect of orthopedic shoes on the interzonal load distribution on the plantar foot surface in children with CP and adolescents with different levels of gross motor function disorders (GMFCS). MATERIALS AND METHODS: Biomechanical studies were conducted in 42 patients with CP 5-16 years old with GMFCS 13 level while wearing standard and orthopedic shoes. In 14 healthy children controls while wearing standard shoes (a total of 112 feet). Biomechanical examinations were performed on the software and hardware complex DiaSled-M-Scan with matrix plantar pressure meters in the form of insoles. Statistical data analysis was performed using nonparametric methods via SPSS software for Windows. RESULTS: The use of complex orthopedic shoes in patients with level GMFCS 1 did not improve but worsened their foot loading parameters. The shoes reduced the loading of the heel, increased the toe-heel load ratio, and mediolateral load distribution in the fascicle area. In patients with GMFCS 2, the positive effect of orthopedic shoes was limited to improving the mediolateral load distribution in the fascicle area. In patients with GMFCS 3, the positive effect of orthopedic shoes was noted in the majority of the tested parameters. CONCLUSION: Thus, the study showed that in children and adolescents with CP using complex orthopedic shoes led to the most significant normalization of interzonal load distribution under the foot in GMFCS 3 patients, less significant in GMFCS 2 patients, and worsened the parameters in GMFCS 1 patients.

The short-term effectiveness of Kinesiology Taping on foot biomechanics in patients with hallux valgus

BACKGROUND: Hallux valgus, one of the most common foot disorders, contributes to the formation of pain and changes foot biomechanics. OBJECTIVE: To assess the impact of Kinesiology Taping (KT) on foot loading during gait in patients with hallux valgus. METHODS: Forty feet with hallux valgus were examined. Patients wore the KT for a month and the parameters of the foot during gait on a baropodometric platform were measured three times: before taping, immediately after application of taping and after one month’s use. RESULTS: The taping had a statistically significant effect on dynamic foot measurements. The maximum and mean foot load (p< 0.001), foot surface (p< 0.001), ratio of forefoot to hindfoot load (p< 0.01) and the proportions of the lateral and medial foot loading (p< 0.05) all changed. During gait cycle, taping significantly increased the load and surface at the first metatarsal head (p< 0.001) while there was a decrease around the second to fifth (p< 0.001) metatarsal heads. CONCLUSIONS: Using KT to correct a hallux valgus is a procedure that has an impact on the dynamic parameters of the foot during gait. The use of this method could become an alternative to surgical treatment for those patients, who have any contraindication for surgery.

Vulnerability of the foot's morphological structure to deformities caused by foot loading paradigm in school-aged children: a cross-sectional study

The study aimed to assess the association between the key predictive foot structure variables and its loading paradigm in 625 school-aged children. Clinical appraisal relied primarily on having the plantar parts of their feet comprehensively assessed with Podoscan 2D Foot CAD, and a dynamometer platform, the research tools of choice widely acknowledged for their overall accuracy and reliability, with a view to determining the distribution of respective foot loads, as well as addressing both balance and gait issues. The Clarke's angle, Wejsflog index, length and width of the feet, regardless of gender, proved the key predictive variables for the foot-loading paradigm. Notably the Clarke's angle, construed the most sensitive variable in assessing flat-footedness, offered an extra added value in overall investigative effort. The actual design of the study protocol effectively complements a standard clinical assessment procedure, whereas by comprehensively addressing those variables, it is also believed to aid clinicians in gaining an extra, hands-on, diagnostic potential, so that any teenagers exposed to the highest risk of developing foot deformities could effectively be identified through pertinent screening tests, and consequently offered a task-oriented, therapeutic management, specifically aimed at preventing potential postural complaints in later life.

A cross-sectional study on foot loading patterns in elite soccer players of different ages

BACKGROUND: Alterations in plantar loading patterns are risk factors for stress injuries of the lower limb, particularly of the foot and ankle. Epidemiological studies have revealed a higher incidence of soccer-related stress fractures of the fifth metatarsal (MT V) in younger athletes than in their adult counterparts. OBJECTIVE: The aim of the present study was to assess the plantar pressure distributions of members of four high-level soccer teams of different age groups to identify age-related differences in loading patterns. METHODS: A total of 65 elite soccer players were included in the study. Data were computed with sensor-loaded insoles (pedar® X system, novel Inc., Munich, Germany) while the players ran in soccer shoes. Plantar pressures for nine defined regions on the preferred and nonpreferred foot were analyzed. RESULTS: The participants consisted of 17 elite male soccer professionals from the first national league (mean 23 years, height 184 cm, weight 81 kg), 14 players from the under-21 squad (U21, 20 years, 180 cm, 75 kg), 15 players from the U17 squad (16 years, 176 cm, 69 kg) and 19 players from the U16 squad (15 years, 179 cm, 70 kg). We detected statistically significantly elevated peak pressures on the lateral aspects of the nonpreferred foot compared with the preferred foot in the U16 and U17 players, corresponding to a relative increase by 29% (p= 0.044) in the lateral midfoot, a relative increase by 24% (p= 0.031) in MT heads 4–5 in the U16 players and a difference of 18% (p= 0.049) in the lateral midfoot in the U17 players. In contrast, the U21 and adult professional players displayed symmetric plantar pressure distributions in all foot regions. CONCLUSIONS: In contrast to adult elite soccer players, adolescents demonstrate asymmetric foot loading patterns with increased peak loads in the lateral aspects of the nonpreferred foot. Our results may provide some explanation for MT V stress fractures that occur in elite adolescents.

The Role of Foot-Loading Factors and Their Associations with Ulcer Development and Ulcer Healing in People with Diabetes: A Systematic Review

We aimed to comprehensively and systematically review studies associating key foot-loading factors (i.e., plantar pressure, weight-bearing activity, adherence or a combination thereof) with ulcer development and ulcer healing in people with diabetes. A systematic literature search was performed in PubMed and EMBASE. We included studies if barefoot or in-shoe plantar pressure, weight-bearing activity or footwear or device adherence was measured and associated with either ulcer development or ulcer healing in people with diabetes. Out of 1954 records, 36 studies were included and qualitatively analyzed. We found low to moderate quality evidence that lower barefoot plantar pressure and higher footwear and device adherence associate with lower risk of ulcer development and shorter healing times. For the other foot-loading factors, we found low quality evidence with limited or contradictory results. For combined measures of foot-loading factors, we found low quality evidence suggesting that lower cumulative plantar tissue stress is associated with lower risk of ulcer development and higher ulcer healing incidence. We conclude that evidence for barefoot plantar pressure and adherence in association with ulcer outcome is present, but is limited for the other foot-loading factors. More comprehensive investigation in particularly the combination of foot-loading factors may improve the evidence and targeting preventative treatment.