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Background: In foot amputation, Chopart amputation is considered to have a high risk of deformity, and can result in poor function. We experienced a case in which Chopart amputation combined with tendon transfer and tendon lengthening was performed, and the patient was eventually able to walk independently with a foot prosthesis without experiencing deformity of the foot. We investigated walking speed and plantar pressure after Chopart amputation with and without a foot prosthesis., Case: A 78-year-old man underwent Chopart amputation with tendon transfer and tendon lengthening. As a result, he was able to stand up and walk, both while bearing weight on the heel of the affected foot, but he was unable to push off the ground using that foot. When a foot prosthesis was introduced, the patient's walking speed increased from 0.6 m/s without the prosthesis to 0.8 m/s with the prosthesis, which was an increase of 33%. The plantar pressure at the stump decreased from 129.3 N/cm 2 on average without the prosthesis to 51.6 N/cm 2 with the prosthesis, which was a 59% decrease. Wearing a foot prosthesis improved the patient's walking speed and decreased plantar pressure at the amputation stump.

Diffuse idiopathic skeletal hyperostosis (DISH) frequently occurs in the spine, resulting in unstable fractures. Treating thoracolumbar fractures in patients with DISH is often difficult because the anterior opening of the vertebral body is exacerbated by dislocation in the prone position, making reduction difficult. In this study, we introduced a novel skull clamp-assisted positioning (SAP) technique. The patient is placed in a supine position with a skull clamp used in cervical spine surgery before surgery to prevent the progression of dislocation and to restore the patient's position. Using this method, the mean difference in local kyphosis angle improved from -2.9 (±8.4)° preoperatively to 10.9 (±7.7)° postoperatively. Furthermore, posterior displacement decreased from a preoperative mean of 5.5 (±4.3) mm to 0.3 (±0.7) mm postoperatively. Complications such as neurological sequelae, implant fracture, and surgical site infection were not observed through one year of postoperative follow-up. SAP may decrease invasiveness and complications. Longer-term studies and larger sample sizes are needed to establish long-term efficacy and benefits.

Background: Backpack syndrome (BS) is a term used to describe symptoms such as shoulder and back pain that are believed to be caused by carrying a backpack. Few studies have investigated the changes in walking and running parameters with and without backpacks., Objective: The present study aimed to investigate the differences in walking and running parameters with and without backpacks in primary school children with and without BS., Methods: This cross-sectional study included 51 children (average age 9.3 years, 6- 12 years). Two questions were asked beforehand: whether the respondents had shoulder or back pain when going to school and present; those who answered that they had pain in both cases were defined as the BS group, while the others were the control group. Walking and running at comfortable speeds and walking and running with a 6 kg backpack on their backs were measured., Results: During walking, there were main effects for speed, cadence, and strike angle with and without the backpack, but no interactions were identified for any of the parameters. In running, however, there were main effects for speed, stride length, strike angle, and lift-off angle, and an interaction effect was observed for speed and stride length., Conclusions: During walking, carrying a 6 kg backpack increased cadence and walking speed. During running, carrying a backpack caused a decrease in stride length and running speed in the BS group, whereas there was no change in the control group, suggesting that the control and BS groups may respond differently.