A5006046565- Orthopaedic implants and arthroplasty
- Hip disorders and treatments
- Total Knee Arthroplasty Outcomes
- Orthopedic Infections and Treatments
- Bone and Joint Diseases
- Osteoarthritis Treatment and Mechanisms
- Hip and Femur Fractures
- Infective Endocarditis Diagnosis and Management
- Shoulder Injury and Treatment
- Infectious Diseases and Tuberculosis
- Cardiac Valve Diseases and Treatments
- Antimicrobial Resistance in Staphylococcus
- Knee injuries and reconstruction techniques
- Musculoskeletal synovial abnormalities and treatments
- Metastasis and carcinoma case studies
- Lower Extremity Biomechanics and Pathologies
- Bone health and osteoporosis research
- Pelvic and Acetabular Injuries
- Oropharyngeal Anatomy and Pathologies
- Bone fractures and treatments
- Hepatocellular Carcinoma Treatment and Prognosis
- Lung Cancer Diagnosis and Treatment
- Tendon Structure and Treatment
- Cancer Diagnosis and Treatment
- Gastric Cancer Management and Outcomes
Yokohama City University
2016-2025
Yokohama City University Medical Center
2001-2024
Yokohama City University Hospital
2023
Shonan Kamakura General Hospital
2020
University of Southern California
2018
Keck Hospital of USC
2017
Ryukoku University
2013
Cancer Institute (WIA)
1984
Posterior tilt of the pelvis with sitting provides biological acetabular opening. Our goal was to study post-operative interaction skeletal mobility and sagittal component position.This a radiographic 160 hips (151 patients) who prospectively had lateral spinopelvic hip radiographs for implant measurements. Intra-operative position determined according pre-operative spinal mobility. Sagittal measurements ante-inclination sacral angle were used as surrogate risk impingement, intra-operative...
Late dislocations after total hip arthroplasty (THA) are challenging for the surgeon because cause is often not evident and recurrence common. Recently, decreased spinopelvic motion has been implicated as a of dislocation. The purpose this study was to assess mechanical causes late dislocation, including influence motion.Twenty consecutive patients were studied identify their Cup inclination anteversion measured on standard pelvic radiographs. Lateral standing sitting spine-pelvis-hip...
Background: The incidence of developmental dysplasia the hip (DDH) in Japanese newborns has reduced drastically following a primary prevention campaign initiated around 1972 to 1973; this perinatal education promoted maintaining hips naturally flexed-leg position. purpose present study was describe life course epidemiology osteoarthritis (OA) adolescent and adult patients assess its association with exposure for DDH. Methods: We included new OA diagnosed from January 1, 2022, December 31, at...
Recent studies have reported the acceleration of subchondral bone remodeling during development osteoarthritis (OA). However, it is not possible to evaluate such molecular abnormalities using conventional radiographic techniques. We applied 18F-fluoride PET analysis painful or dysplastic hips at various stages OA and then compared this with findings clinical findings.A consecutive series 65 joints from 48 patients (average age, 40 years; range, 19-72 years) a hip joint complaint were...
Purpose: The preoperative differentiation of aseptic and septic loosening following a total hip arthroplasty (THA) remains challenging issue for clinicians to which several molecular imaging techniques have been applied. In our current study, we used F-18 fluoride positron emission tomography (PET) evaluate THA cases with stable, or loosened implants assess the possibility differentiating these clinical settings using novel uptake-type classification approach. Materials Methods: A 65 joints...
The imaging diagnosis of osteoarthritis (OA) the hip, especially in its early stages, is a technically challenging but essential aspect our increased understanding pathophysiology this disorder. We recently applied 18F-fluoride PET for detection abnormal bone turnover early-stage OA. In current study, we have compared diagnostic and analytical capabilities MRI modalities hip OA patient series.A total 85 joints, including hips at various stages as well painful, dysplastic, normal...
The mechanism underling bone mineral density (BMD) loss that occurs in the femur after total hip arthroplasty (THA) remains unknown. We compared equivalent stress and strain energy (SED) to BMD THA using subject-specific finite element analyses. Twenty-four patients who had undergone primary cementless were analysed. was measured dual-energy X-ray absorptiometry (DEXA) at 1 week 3, 6 12 months THA. Seven regions of interest (ROIs) defined accordance with Gruen's system (ROIs 1–7). Computed...
Background: The spine-pelvis-hip interaction during postural change should be considered in the functional anatomy of hip. component parts this and how they influence hip function are important to know. Pelvic incidence (PI) is one these components. We studied if PI was preoperatively predictive impingement risk it postoperatively influences position, which could cause outliers from safe zone replacement. Methods: This a prospective radiographic study 187 consecutive patients (200 hips) who...
Introduction Patients with femoral neck fractures (FNF) have reduced walking ability owing to muscle weakness. Preoperative volume and quality may an association prolonged rehabilitation can be useful predict the postoperative in patients FNF. This study aimed compare computed tomography (CT)-assessed density around hip joint FNF having osteoarthritis (HOA) assess of these measurement ability. Materials Methods retrospective observational included 15 unilateral HOA who were matched for age,...
In total hip arthroplasty (THA), tilting of the pelvis alters cup placement angles. Thus, angles need to be planned with consideration effects pelvic tilt. present study, we evaluated efficacy preoperative planning for implant tilt in THA, and accuracy a CT-based computer navigation positioning.We examined 75 hips patients who underwent THA were followed-up one year postoperatively. The divided into three groups (anterior, intermediate, posterior tilt) according their Preoperative was made...
In this study we used subject-specific finite element analysis to investigate the mechanical effects of rotational acetabular osteotomy (RAO) on hip joint and analysed correlation between various radiological measurements stress in joint. We evaluated 13 hips 12 patients (two men ten women, mean age at surgery 32.0 years; 19 46) with developmental dysplasia (DDH) who were treated by RAO. Subject-specific models constructed from CT data. The centre-edge (CE) angle, head index (AHI), angle...
Background and purpose There are several diagnostic tests for periprosthetic joint infection (PJI). We evaluated the properties of preoperative serum C-reactive protein (CRP), real-time polymerase chain reaction (PCR), histopathological evaluation frozen permanent sections in clinical cases with culture-positive PJI.Patients methods 63 joints involving 86 operations were analyzed using CRP measurement prior to operation tissue samples collected intraoperatively PCR histopathology. calculated...
In total hip arthroplasty (THA), the cementless, tapered-wedge stem design contributes to achieving initial stability and providing optimal load transfer in proximal femur. However, loading conditions on femur following THA are also influenced by femoral structure. Therefore, we determined effects of stems distribution using subject-specific finite element models femurs with various canal shapes.We studied 20 femurs, including seven champagne flute-type five stovepipe-type eight...
The accurate diagnosis of periprosthetic infection requires assessment intraoperative tissues. These must be sampled from the appropriate sites. We used (18)F-fluoride positron emission tomography (PET) to identify sites inflammation in order improve sensitivity histopathology, microbiological culture, and real-time PCR total hip arthroplasty (THA) patients.23 THA patients (23 hips) scheduled for revision surgery (the group) 17 uninfected hips; control were enrolled. Uptake was classified...
Fungal periprosthetic joint infections are one of the most intractable orthopedic disorders. Continuous local antibiotic perfusion allows direct administration antifungal agent micafungin into infection area at biofilm-disruptive concentrations, while controlling dead space in addition to conventional treatment. Although appropriate use continuous requires familiarity with characteristics perfusion, it is a versatile treatment modality that can improve clinical outcomes fungal combination methods.
Abstract Purpose Since 2011, we have used computed tomography (CT)-based navigation to perform safe and accurate rotational acetabular osteotomy (RAO) for treating developmental dysplasia of the hip. We developed a new method with four fiducial points improve accuracy published technique. In this study, introduced achieve reorientation in accordance planning evaluated its accuracy. Methods This study included 40 joints, which underwent RAO CT-based navigation. 20 was confirmed by touching...
Periprosthetic infection is one of the most serious complications arthroplasty, and low-grade infections are particularly difficult to diagnose with use conventional culture methods. Real-time polymerase chain reaction a potentially viable way overcome this detection problem as it more rapid sensitive technique. In current study, we used intraoperative identification combined simple DNA-release method ultrasonication periprosthetic during revision surgery.Thirty arthroplasty procedures were...