A5102778620- Bone fractures and treatments
- Bone health and osteoporosis research
- Orthopaedic implants and arthroplasty
- Hip and Femur Fractures
- Osteoarthritis Treatment and Mechanisms
- Spinal Fractures and Fixation Techniques
- Lower Extremity Biomechanics and Pathologies
- Prosthetics and Rehabilitation Robotics
- Spine and Intervertebral Disc Pathology
- Balance, Gait, and Falls Prevention
- Orthopedic Infections and Treatments
- Ultrasound and Hyperthermia Applications
- Artificial Intelligence in Healthcare and Education
- Medical Imaging and Analysis
- Hip disorders and treatments
- Tendon Structure and Treatment
- Management of metastatic bone disease
- Injury Epidemiology and Prevention
- Facial Trauma and Fracture Management
- Knee injuries and reconstruction techniques
- Cerebral Palsy and Movement Disorders
- Bone Tissue Engineering Materials
- Total Knee Arthroplasty Outcomes
- Photoacoustic and Ultrasonic Imaging
- Delphi Technique in Research
International University of Health and Welfare
2011-2023
Japan Organization of Occupational Health and Safety
2018
The University of Tokyo
2004-2015
Tokyo Metropolitan Tama Medical Center
2015
Kobe University
2006
University of Tokyo Hospital
2005
In Brief Study Design. A study on computed tomography (CT)-based finite element (FE) method that predicts vertebral strength and fracture site using human cadaveric specimens. Objective. To evaluate the accuracy of nonlinear FE by comparing predicted data with those mechanical testing. Summary Background Data. methods may predict but prediction has been difficult because a complex geometry, elastoplasticity, thin cortical shell vertebra. Methods. models 12 thoracolumbar specimens were...
In Brief Study Design. A clinical study on osteoporotic vertebral strength in daily living using a computed tomography (CT)-based nonlinear finite element (FE) model. Objective. To evaluate the differences predicted fracture of bodies among different loading conditions that are occurring activities living. Summary Background Data. FE model has been reported to predict uniaxial loading, but forward bending load plays an important role fractures. Methods. Strengths second lumbar vertebra 41...
We evaluated the effect of low-intensity pulsed ultrasound stimulation (LIPUS) on remodelling callus in a rabbit gap-healing model by bone morphometric analyses using three-dimensional quantitative micro-CT. A tibial osteotomy with 2 mm gap was immobilised rigid external fixation and LIPUS applied active translucent devices. control group had sham inactive transducers applied. region interest micro-CT set at centre width 1 mm. The parameters used for evaluation were volume mineralised (BV)...
The objective of this study was to investigate the factors that affect predicted bone strength proximal femur in Japanese population.Participants (552 men and 273 women) a health checkup program with computed tomography (CT) at University Tokyo Hospital were enrolled study. Three-dimensional finite element models constructed from CT data participants simultaneous scans calibration phantom containing hydroxyapatite rods. Multiple regression analysis performed analyze relationship between...
Conventional surgical navigation requires for surgeons to move their sight and conscious off the field when checking tool's positions shown on display panel. Since that takes high risks of exposure possibilities patient's body, we propose a novel method guiding tool position orientation directly in by laser beam. In our procedure, two cross-sectional planar beams are emitted from devices attached onto both sides an optical localizer, show entry body surface its side face tool. experiments,...
In this paper, we discuss the issue of safety in robot-assisted fracture reduction. We define hazards reduction and design control methods. Although a large force is required to reduce femoral neck fractures, an unexpectedly produced by robot may cause injury patient. have designed two mechanical failsafe units software limiter; along with velocity can guarantee safe operation force. addition, movement bone fragments as much possible, devised spatially constrained methods for...
Objective: To evaluate the reliability and validity of this new measure, called caregivers’ fear falling index (CFFI).Methods: The study surveyed home-based rehabilitation patients with fall-related fracture, their primary caregivers. characteristics these were evaluated, caregivers using CFFI Falls Efficacy Scale-International (FES-I). was assessed item-total correlation, while evaluated through correlation coefficients calculated between FES-I.Results: participants 51 patient-caregiver...
This study aimed to identify evaluation items that can be used create an index evaluate caregivers’ fear of care recipient falls. A three-round Delphi method was conducted with medical professionals engaged in discharge support for patients fall-related fractures. In the first round, a working group brainstormed items. second and third rounds, opinions were quantified refined. The showed convergence opinion Kendall’s W 0.561 round. Of 109 pooled consensus reached on importance 19 one more...
We have developed a surgical robotic system for femoral fracture reduction employing indirect traction. Indirect traction in is generally used method preventing complications such as bone splits caused by high stress on bones. For traction, patient's foot gripped jig and pulled to the distal side. has advantage of distributing utilizing strong force; however, this procedure does not accurately control proper positioning fractured fragments when robot used. The human leg knee an ankle joints,...
We investigated the effect of cartilage degeneration on ultrasound speed in human articular vitro.Ultrasound was calculated by time-of-flight method for 22 femoral condyle osteochondral blocks obtained from osteoarthritis patients. In parallel, histological evaluation specimens performed using modified Mankin and OARSI scores.The mean 1757 ± 109 m/s. Ultrasound showed significant negative correlation with score, a decreasing tendency high scores. Good found between optically measured...
In these days, external fixation is widely used for femoral fractures because of less-invasiveness surgical exposure. It requires staff their X-ray exposure by fluoroscopy aligning bone fragments and fixing the bones a multi-joint fixator. A navigation system often employed to reduce amount indicating intuitive information tool guidance. Additionally, it can lead high accuracy time saving surgeries. Nakajima et a1.4) have been proposed laser method guiding position orientation. Two...