James D. Johnston

ORCID: 0000-0003-0804-2398
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About
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Research Areas
  • Bone health and osteoporosis research
  • Osteoarthritis Treatment and Mechanisms
  • Hip disorders and treatments
  • Lower Extremity Biomechanics and Pathologies
  • Bone fractures and treatments
  • Bone and Joint Diseases
  • Orthopaedic implants and arthroplasty
  • Total Knee Arthroplasty Outcomes
  • Orthopedic Surgery and Rehabilitation
  • Hip and Femur Fractures
  • Bone Tissue Engineering Materials
  • Knee injuries and reconstruction techniques
  • Sports injuries and prevention
  • Plant biochemistry and biosynthesis
  • Body Composition Measurement Techniques
  • Natural product bioactivities and synthesis
  • Bone health and treatments
  • Orthopedic Infections and Treatments
  • Shoulder Injury and Treatment
  • dental development and anomalies
  • Meta-analysis and systematic reviews
  • Medical Imaging Techniques and Applications
  • Additive Manufacturing and 3D Printing Technologies
  • Nutrition and Health in Aging
  • Medical Imaging and Analysis

University of Saskatchewan
2016-2025

University of British Columbia
2007-2022

Vancouver General Hospital
2022

The University of Queensland
2013

Diversified Technical Systems (United States)
2012

University of California, Davis
2011

University of Pennsylvania
2009

International Collaboration On Repair Discoveries
2008

Vancouver Coastal Health Research Institute
2008

Institute of Orthopedic Research and Education
2003-2007

Abstract Background It is known that a number of parameters can influence the post-printing properties bone tissue scaffolds. Previous research has primarily focused on effect associated with scaffold design (e.g., porosity) and specific printing processes pressure). To our knowledge, no studies have investigated variations in attributed to techniques used synthesize materials for melt-blending, powder blending, liquid solvent, solid solvent). Methods Four material preparation were determine...

10.1186/s40824-021-00204-y article EN cc-by Biomaterials Research 2021-01-26

Abstract The long-term benefits of habitual physical activity during adolescence on adult bone structure and strength are poorly understood. We investigated whether physically active adolescents had greater size, density, content, estimated in young adulthood when compared to their peers who were inactive adolescence. Peripheral quantitative computed tomography (pQCT) was used measure the tibia radius 122 (73 females) participants (age mean ± SD, 29.3 2.3 years) Saskatchewan Pediatric Bone...

10.1002/jbmr.2055 article EN Journal of Bone and Mineral Research 2013-08-01

Lyme neuroborreliosis—characterized as chronic, necrosuppurative to nonsuppurative, perivascular diffuse meningoradiculoneuritis—was diagnosed in 2 horses with progressive neurologic disease. In 1 horse, Borrelia burgdorferi sensu stricto was identified by polymerase chain reaction amplification of B stricto–specific gene targets ( ospA, ospC, flaB, dbpA, arp). Highest spirochetal burdens were tissues inflammation, including spinal cord, muscle, and joint capsule. Sequence analysis flaB...

10.1177/0300985811398246 article EN Veterinary Pathology 2011-02-01

Abstract Objective To compare regional stiffness of the white line (objective 1) and image-based metrics damage 2) control claws subjected to an abrasion simulator mimicking animals abrading their against a concrete surface commonly found in feedlots. Methods Sixteen (n = 16) cadaveric bovine hind limbs were acquired from participating commercial feedlots separated into different testing groups: lateral simulation 8) manually rasped same level wear after 8). Claws indentation along determine...

10.2460/ajvr.24.07.0206 article EN cc-by-nc American Journal of Veterinary Research 2025-02-21

Abstract It remains unclear if participation in moderate-to-vigorous physical activity (MVPA) differs between children with ASD and typically developing (TDC). We compared daily MVPA, time spent MVPA during education (PE) recess, odds of not meeting recommendation (60 min/day) TDC. Nine studies reporting accelerometer-measured were included the meta-analyses. was 30 min lower/day, 12% 8% lower PE respectively, ASD, they had 4 times higher when to Children engage less than TDC below...

10.1007/s40489-021-00262-x article EN cc-by Review Journal of Autism and Developmental Disorders 2021-07-17

Abstract Cortical bone porosity and specifically the orientation of vascular canals is an area growing interest in biomedical research comparative/paleontological anatomy. The potential to explain microstructural adaptation great interest. However, determinants development canal remain unclear. Previous studies birds have shown higher proportions circumferential (called laminarity) flight bones than hindlimb bones, interpreted this as a sign that are feature for resistance torsional loading...

10.1111/joa.12803 article EN cc-by-nc Journal of Anatomy 2018-03-08

Subchondral bone cysts are a widely observed, but poorly understood, feature in patients with knee osteoarthritis (OA). Clinical quantitative computed tomography (QCT) has the potential to characterize vivo it is unclear which specific cyst parameters (e.g., number, size) associated clinical signs of OA, such as disease severity or pain. The objective this study was use QCT-based image-processing techniques subchondral tibial OA and explore relationships between proximal density well...

10.1186/s12891-018-2388-9 article EN cc-by BMC Musculoskeletal Disorders 2019-01-05

There is a need to investigate the effect of specific movement strategies in reducing biomechanical risk factors for anterior cruciate ligament injury young female athletes. The purpose this study was (a) determine feasibility implementing novel strategy (Core-PAC) into team warm-up before soccer training based on subject compliance and integration Core-PAC (b) whether would improve peak knee flexion angles abduction moments at during side cut (SC) an unanticipated (USC) kicking ball, hop...

10.1519/jsc.0b013e3182472fef article EN The Journal of Strength and Conditioning Research 2011-12-30
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