James (J.D.) Johnston

     James (J.D.) Johnston  B.Sc., M.Sc., Ph.D., P. Eng

    Associate Professor of Mechanical Engineering

    Biography

    J.D. Johnston joined the Mechanical Engineering Department at the U of S in 2008 while finishing his PhD at the University of British Columbia. He had previously received his BSc(Eng) in Mechanical Engineering from the University of New Brunswick in 1999 and his MSc(Eng) in Mechanical Engineering from Queen's University in 2001. Between his MSc and PhD he spent 3 years at the Institute of Orthopedic Research and Education in Houston, Texas as a biomedical research engineer.

    Research Summary

    J.D. Johnston's research interests are in the area of orthopaedic biomechanics and musculoskeletal medical imaging. His primary interest is in the usage of mechanical means (mechanical testing, finite element analyses, kinematic/kinetic motion analyses) and quantitative imaging tools (CT, MRI, synchrotron radiography) to investigate links between mechanics and disease processes: particularly osteoarthritis and osteoporosis. Additional interests pertain to joint replacements; the end result of osteoarthritis. Past investigations have focused on biomechanical studies of the hip, knee and spine which led towards the development of novel implant designs.

    Publications

    Refereed Journal Publications
    • Johnston JD, Burnett W, Kontulainen S (2016). Subchondral bone traits, morphology and mechanical properties as biomarkers of osteoarthritis onset and severity. In: Biomarkers in Disease: Methods, Discoveries and Applications. Biomarkers in Bone Disease. Preedy V & Patel V eds. London: Springer.
    • Cooper DML, Kawalilak CE, Harrison K, Johnston JD (2016). Cortical Bone Porosity: What is it, why is it important and how can we detect it? Current Osteoporosis Reports 3: 3.
    • Kawalilak C, Kontulainen S, Amini M, Lanovaz JL, Wojciech P, Olszynski MD, Johnston JD (2016). In vivo precision of three HR-pQCT-derived finite element models of the distal radius and tibia in postmenopausal women. BMC Musculoskeletal Disorders. (Accepted: August 2016)
    • Nazemi M, Cooper DML, Johnston JD (2016). Quantifying trabecular bone material anisotropy and orientation using low resolution clinical CT images: A feasibility study. Medical Engineering & Physics. (eTOC: June 2016). Available online at: www.ncbi.nlm.nih.gov/pubmed/27372175
    • Burnett WD, Kontulainen SA, McLennan CE, Hazel D, Talmo C, Wilson DR, Hunter DJ, Johnston JD (2016). Patella bone density is lower in knee osteoarthritis patients experiencing moderate-to-severe pain at rest. J Musculoskelet Neuronal Interact. 16(1); 33-39. Available online at: http://www.ismni.org/jmni/pdf/63/V16I1_06BURNETT.pdf
    • Kawalilak CE, Johnston JD, Cooper DM, Olszynski WP, Kontulainen SA (2016). Role of endocortical contouring methods on precision of HR-pQCT-derived cortical micro-architecture in postmenopausal women and young adults. Osteoporosis Int. 27(2); 789-96. Available online at: http://www.ncbi.nlm.nih.gov/pubmed/26252976
    • Rajabi A, Dolovich AT, Johnston JD (2015). From the rhombic transposition flap toward Z-plasty: An optimized design using the finite element method. Journal of Biomechanics. 48(13); 3681-7. Available online at: http://www.ncbi.nlm.nih.gov/pubmed/26341459
    • Burnett WD, Kontulainen SA, McLennan CE, Hazel D, Talmo C, Wilson DR, Hunter DJ, Johnston JD (2015). Response to Letter to the Editor: 'Is subchondral bone mineral density associated with nocturnal pain in knee osteoarthritis patients?’ Osteoarthritis and Cartilage. 23(12); 2299-301. Available online at: http://www.ncbi.nlm.nih.gov/pubmed/26162805
    • Crockett K, Arnold CM, Farthing JP, Chilibeck PD, Johnston JD, Bath B, Baxter-Jones ADG, Kontulainen SA (2015). Bone strength and muscle properties in postmenopausal women with and without a recent distal radius fracture. Osteoporosis Int. Accepted (04/2015).
    • Frank-Wilson A, Johnston JD, Olszynski WP, Kontulainen SA (2015). Measurement of muscle and fat in postmenopausal women: precision of previously reported pQCT imaging methods. Bone. 75; 49-54. Available online at: www.ncbi.nlm.nih.gov/pubmed/25659205
    • Kawalilak CE, Johnston JD, Olszynski WP, Kontulainen SA (2015). Monitoring time interval for high resolution pQCT-derived bone outcomes in postmenopausal women. Journal of Musculoskeletal and Neuronal Interactions. Revision Submitted (02/2015).
    • Burnett WD, Kontulainen SA, McLennan CE, Hazel D, Talmo C, Wilson DR, Hunter DJ, Johnston JD (2015). Proximal tibial bone density is altered in knee osteoarthritis patients experiencing severe nocturnal pain. Osteoarthritis and Cartilage. Accepted (04/2015). Available online at: http://dx.doi.org/10.1016/j.joca.2015.04.012.
    • Amini M, Nazemi M, Lanovaz JL, Kontulainen SE, Masri BA, Wilson DR, Szyszkowski W, Johnston JD (2015). Individual and combined effects of OA-related subchondral bone alterations on proximal tibial surface surface stiffness: A Parametric Finite Element Modeling Study. Medical Engineering and Physics. Revision Submitted (02/2015).
    • Nazemi M, Amini M, Kontulainen SA, Milner J, Holdsworth DW, Masri BA, Wilson DR, Johnston JD (2015). Prediction of local proximal tibial subchondral bone structural stiffness using subject-specific finite element modeling: Effect of selected density-modulus relationship. Clinical Biomechanics. Revision Submitted (02/2015).
    • Tulloch P, Johnston JD, Barber S, Gellert C, Lang, Panizzi L (2014). In vitro Evaluation of Carpal Fexion in the Horse after Partial Carpal Arthrodesis. Veterinary Surgery. Accepted: September/2014. Available online at: http://onlinelibrary.wiley.com/doi/10.1111/j.1532-950X.2014.12299.x/abstract
    • Kawalilak CE, Lanovaz JL, Johnston JD, Kontulainen SA (2014). Linearity and sex-specificity of impact force prediction during a fall onto the outstretched hand using a single-damper-model. J Musculoskelet Neuronal Interact. 14(3). 286-93. Available online at: www.ncbi.nlm.nih.gov/pubmed/25198223
    • Kawalilak CE, Johnston JD, Olszynski WP, Kontulainen SA (2014). Characterizing microarchitectural changes at the distal radius and tibia in postmenopausal women using HR-pQCT. Osteoporos Int. 25(8); 2057-66. Available online at: www.ncbi.nlm.nih.gov/pubmed/24781379
    • Johnston JD, Liao L, Dolovich AT, Leswick DA, Kontulainen SA (2014). Magnetic resonance imaging of bone and muscle traits at the hip: an in vivo precision study. J Musculoskelet Neuronal Interact. 14(1); 104-10. www.ncbi.nlm.nih.gov/pubmed/24583545
    • Burnett WE, Kontulainen SA, McLennan CE, Hunter DJ, Wilson DR, Johnston JD (2014). Regional depth-specific subchondral bone density measures in osteoarthritic and normal patellae: in vivo precision and preliminary comparisons. Osteoporos Int. 25(3); 1107-14. Available online at: www.ncbi.nlm.nih.gov/pubmed/24221452
    • Celebrini R, Eng J, Miller W, Ekegran C, Johnston JD, Depew T, MacIntyre D (2014). Effect of a novel movement strategy in decreasing ACL risk factors in female adolescent soccer players: a randomized controlled trial. Clin J Sport Med. 24(2); 134-41. Available online at: www.ncbi.nlm.nih.gov/pubmed/24184850
    • Kawalilak CE, Johnston JD, Olszynski WP, Leswick DA, Kontulainen SA (2013). Comparison of Short-Term In Vivo Precision of Bone Density and Microarchitecture at the Distal Radius and Tibia Between Postmenopausal Women and Young Adults. J Clin Densitom. 17(4); 510-7. Available online at: www.ncbi.nlm.nih.gov/pubmed/24206866
    • Duckham R, Baxter-Jones A, Johnston JD, Vatanparast H, Cooper D, Kontulainen SA (2013). Does physical activity in adolescence have site and sex specific benefits on young adult bone size, content and estimated strength? Journal of Bone and Mineral Research. 29(2); 479-86. Available online at: www.ncbi.nlm.nih.gov/pubmed/23907819
    • Duckham R, Frank A, Johnston JD, Olszyncki W, Kontulainen S (2013). Monitoring Time Interval for pQCT-derived bone outcomes in postmenopausal women. Osteoporosis International. 24(6); 1917-22. Available online at: http://www.ncbi.nlm.nih.gov/pubmed/23344257
    • Kontulainen SA, Johnston JD (2013). Bone acquisition/pediatric bone: Meeting Report from the 34rd Annual Meeting of the American Society for Bone and Mineral Research. IMBS Bone Key. 10(261).
    • Plesman R, Sharma A, Gilbert P, Campbell J, Johnston JD, Schmon C, Linn K (2012). Radiographic landmarks for measurement of cranial tibial subluxation in the canine cruciate ligament deficient stifle. Veterinary Comparative Orthopedics and Traumatology. 25(6); 478-87. Available online at: http://www.ncbi.nlm.nih.gov/pubmed/22828667
    • Frank, A., Labas, M., Johnston, J. and Kontulainen, S. (2012). Site specific variance in radius and tibia bone strength as determined by muscle size and body mass., Physiotherapy Canada, 64(3), 292-301. Available online at: http://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23729966/
    • Al Nazer, R., Lanovaz, J., Kawalilak, C., Johnston, J. and Kontulainen, S. (2012). Direct in vivo strain measurements in human bone-A systematic literature review., Journal of Biomechanics, 45((1)), 27-40.
    • Celebrini, R., Eng, J., Miller, W., Ekegran, C., Johnston, J. and MacIntyre, D. (2011). The effect of a novel movement strategy in decreasing ACL risk factors in female adolescent soccer players., J Strength Cond Res, 1(Epub), 00-00.
    • Johnston, J., Kontulainen, S., Masri, B. and Wilson, D. (2011). Predicting subchondral bone stiffness using a depth-specific CT topographic mapping technique in normal and osteoarthritic proximal tibiae., Clinical Biomechanics, 26(10), 1012-18. Available online at: http://www.ncbi.nlm.nih.gov/pubmed/21775036
    • Kontulainen, S., Kawalilak, C. and Johnston, J. (2011). Bone acquisition/pediatric bone: Meeting Report from the 33rd Annual Meeting of the American Society for Bone and Mineral Research., IMBS BoneKEy, 11, 486-489.
    • Johnston, J., McLennan, C., Hunter, D. and Wilson, D. (2010). In vivo precision of a depth-specific topographic mapping technique in the CT analysis of osteoarthritic and normal proximal tibial subchondral bone density, Skeletal Radiology, 1(Epub), 1-8.
    • Johnston, J., Kontulainen, S., Masri, B. and Wilson, D. (2009). A comparison of conventional maximum intensity projection with a new depth-specific topographic mapping technique in the CT analysis of proximal tibial subchondral bone density, Skeletal Radiology, 39(Epub 2009 November 22), 867-876. Available online at: http://www.springerlink.com/content/u770620577704m18/
    • Johnston, J., Masri, B. and Wilson, D. (2009). Computed tomography topographical mapping of subchondral density (CT-TomasD) in osteoarthritic and normal knees: methodological development and preliminary findings., Osteoarthritis & Cartilage, 17(10), 1319-26. Available online at: www.sciencedirect.com
    • Varner, K., Matt, V., Alexander, J., Johnston, J., Younas, S., Marymont, J. and Noble, P. (2009). Screw versus plate fixation of proximal first metatarsal crescentic osteotomy., Foot Ankle Int, 30(2), 142-149. Available online at: www.ncbi.nlm.nih.gov
    • Kontulainen, S., Johnston, J., Liu, D., Leung, C., Oxland, T. and McKay, H. (2008). Strength indices from pQCT imaging predict 89% of bone failure load at distal and shaft sites of tibia., J Musculoskelet Neuronal Interact, 8(4), 401-409. Available online at: www.ncbi.nlm.nih.gov
    • Beadon, K., Johnston, J., Siggers, K., Itshayek, E. and Cripton, P. (2008). A repeatable ex vivo model of spondylolysis and spondylolisthesis., Spine, 33(22), 2387-2393. Available online at: www.ncbi.nlm.nih.gov
    • Wilson, D., McWalter, E. and Johnston, J. (2008). The measurement of joint mechanics and their role in osteoarthritis genesis and progression. Review., Rheumatic Disease Clinics of North America, 34(August), 605-622. Available online at: www.ncbi.nlm.nih.gov
    Refereed Conference Proceedings
    • Arjmand H, Nazemi M, Kontulainen S, Milner J, Holdsworth DW, McLennan C, Hazel D, Talmo C, Hunter DJ, Wilson DR, Johnston JD (2016). Precision and preliminary comparison of subchondral bone mechanical properties at the proximal tibia from normal and osteoarthritic knees. 1) AAOS/ORS Tackling Joint Disease by Understanding Crosstalk between Cartilage and Bone Research Symposium, Chicago, USA. 2) OA Imaging Conference, Oulu, Finland.
    • Kontulainen S, Hunter DJ, McLennan CE, Hazel D, Talmo C, Wilson DR, Johnston JD (2016). Muscle adiposity and subcutaneous fat in the lower leg are associated with walking pain and knee-related quality of life in individuals with knee OA. OA Imaging Conference, Oulu, Finland.
    • Arjmand H, Nazemi M, Kontulainen S, Milner J, Holdsworth DW, McLennan C, Hazel D, Talmo C, Hunter DJ, Wilson DR, Johnston JD (2016). Finite element modeling of proximal tibial stiffness in normal and osteoarthritic knees: in vivo precision and preliminary comparisons. Osteoarthritis Research Society International.
    • Burnett D, Kontulainen, S, McLennan CE, Wilson DR, Hunter DJ, Johnston JD (2015). Proximal tibial epiphyseal bone mineral density is related to pain in patients with knee osteoarthritis. International Workshop on Osteoarthritis Imaging.
    • Nazemi S, Amini M, Kontulainen SA, Milner J, Holdsworth DW, Wilson DR, Johnston JD (2015). Prediction of local proximal tibial subchondral bone structural stiffness using subject-specific finite element modeling: Effect of custom density-modulus relationship. CMBBE.
    • Ellis J, Johnston JD, Farthing J, Oates A, Lanovaz J (2015). Development of a Bilateral Upper Limb Musculoskeletal Model to Investigate Muscle Contributions during Different Push-up Variations. ISB Congress.
    • Hunchak J, Kawalilak CE, Björkman KM, Duff WR, Federow CW, Johnston JD, Kontulainen SA (2015). Precision of bone properties and strength estimates in children. Alberta Biomedical Engineering Conference.
    • Arjmand H, Thomas K, Burnett W, Carmalt JL, Johnston JD (2015). Evaluation of two transfixation cast constructs in horse forelimbs using finite element modeling. Alberta Biomedical Engineering Conference.
    • Nazemi SM, Cooper DML, Kontulainen SA, Masri BA, Wilson DR, Johnston JD (2015). Accounting for spatial variation of anisotropy does not improve finite element prediction of local stiffness at the proximal tibial subchondral surface. Alberta Biomedical Engineering Conference.
    • Eichhorn D, Sacher A, Jelinski M, Johnston JD (2015). Investigation of Toe Tip Necrosis Syndrome Using Biomechanical Testing and High Resolution Imaging. Alberta Biomedical Engineering Conference.
    • Sacher A, Eichhorn D, Kontulainen SA, Cooper DML, Boyd SK, Johnston JD (2015). Validating FE-derived internal bone strain using high resolution imaging and material testing. Alberta Biomedical Engineering Conference.
    • Hosseini M, Nazemi M, Sacher A, Eichhorn D, Kontulainen SA, Cooper DML, Lanovaz JL, Boyd SK, Johnston JD (2015). Validating finite element strain predictions using high resolution imaging and experimental testing. Alberta Biomedical Engineering Conference.
    • Ashjaee N, Kontulainen SA, Johnston G, Johnston JD (2015). Bench-Testing a Novel Surgical Implant to Stabilize Distal Radial Fractures. Alberta Biomedical Engineering Conference.
    • McDonald M, Johnston JD, Arnold C, Johnston G, Kontulainen SA (2014). Validating pQCT-based Indices of Distal Radius Bone Strength under Combined Loading. Alberta Biomedical Engineering Conference.
    • Amini M, Kawalilak C, Arnold C, Kontulainen S, Johnston JD (2014). HR-pQCT FE derived bone strength differentiates between older women with and without recent distal radial fracture. Alberta Biomedical Engineering Conference.
    • Nazemi M, Kontulainen S, Masri B, Wilson D, Johnston JD (2014). Prediction of Local Proximal Tibial Subchondral Bone Stiffness using Subject-Specific Finite Element Modeling: Effect of anisotropy inclusion. Alberta Biomedical Engineering Conference.
    • Burnett WD, Bespflug C, Ghazavi N, Kontulainen S, McLennan C, Hazel D, Talmo C, Hunter DJ, Wilson DR, Johnston JD (2014). Knee pain is associated with osteophyte volume and bone mineral density. Alberta Biomedical Engineering Conference.
    • Bespflug C, Johnston JD, Arnold C, Johnston G, Kontulainen S (2014). pQCT-based Indices of Bone Strength Under Axial and Combined Loading Differentiate Older Women With and Without Recent Distal Radial Fracture. Alberta Biomedical Engineering Conference.
    • Arjmand H, Nazemi M, Burnett WD, Kontulainen SA, McLennan CE, Hazel D, Talmo C, Hunter DJ, Wilson DR, Johnston JD (2014). Investigating associations between OA-related knee pain and mechanical behavior using subject-specific FE modeling of the knee. Alberta Biomedical Engineering Conference.
    • Ghazavi N, Bespflug CJ, Burnett WD, Kontulainen S, McLennan C, Hazel D, Talmo C, Hunter DJ, Wilson DR, Johnston JD (2014). Knee pain is associated with osteophyte size. Alberta Biomedical Engineering Conference.
    • Adam M, Amini M, Johnston G, Kontulainen S, Johnston JD (2014). Distal Radius Strain Distributions during Off-Axis Loading. Alberta Biomedical Engineering Conference.
    • Johnston JD, Kontulainen S, Neogi T, Masri B, Wilson D (2014). Subchondral Bone Underlying Degenerated versus Normal Cartilage Has Greater Bone Mineral Density but No Difference in Structural Stiffness. American Society of Bone and Mineral Research.
    • Kawalilak C, Johnston JD, Cooper D, Olsyznki WP, Kontulainen S (2014). Comparison of short term in vivo precision of cortical bone micro-architecture between two HR-pQCT assessment methods at the distal radius and tibia in postmenopausal women and young adults. American Society of Bone and Mineral Research.
    • Burnett W, Kontulainen S, McLennan C, Hazel D, Talmo C, Hunter D, Wilson D, Johnston JD (2014). Knee osteoarthritis patients with severe pain while lying down have higher local subchondral tibial bone mineral density. American Society of Bone and Mineral Research.
    • Kontulainen S, Johnston JD, Vatanparast H, Cooper D, Baxter-Jones A (2014). Greater Bone Mineral Accrual after the Adolescent Growth Spurt Results in Stronger Bones in Young Adulthood: Evidence from 20-year follow-up of the Pediatric Bone Mineral Accrual Study. American Society of Bone and Mineral Research.
    • Nazemi M, Amini M, Cooper DML, Johnston JD (2014). Estimating Orthotropic Elastic Material Properties Using Clinically Available Imaging Parameters. World Congress of Biomechanics.
    • Nazemi S, Amini M, Kontulainen SA, Millner J, Holdsworth DW, Wilson DR, Johnston JD (2014). Role of Density-Modulus Relationship in Predicting Tibial Subchondral Bone Stiffness Using Quantitative Computed Tomography based Finite Element Technique. World Congress of Biomechanics.
    • Amini M, Kawalilak CE, Cooper DM, Kontulainen SA, Johnston JD (2014). Ex vivo precision of distal radial bone strength derived from two high resolution peripheral quantitative computed tomography based finite element modeling techniques. World Congress of Biomechanics.
    • Kawalilak C, Johnston J, Olszynski W, Kontulainen S (2013). Characterizing Microarchitectural Changes at the Distal Radius and Tibia in Postmenopausal Women Using HR-pQCT. American Society of Bone and Mineral Research.
    • Kontulainen S, Kawalilak C, Frank A, Olszynski W, Johnston J (2013). Decrease in Bone Strength Due to Reduced Total Density and Content is Not Completely Compensated by Increase in Bone Area: Prospective pQCT Evidence from Distal Radius and Tibia in Postmenopausal Women. American Society of Bone and Mineral Research.
    • Burnett WE, Kontulainen SA, McLennan CE, Hunter DJ, Wilson DR, Johnston JD (2013). Regional depth-specific subchondral bone density measures in osteoarthritic and normal patellae: in vivo precision and preliminary comparisons. Alberta Biomedical Engineering Conference.
    • Nazemi M, Amini M, Cooper DML, Johnston JD (2013). Measurement of fabric tensor main eigenvalue from quantitative computed tomography images with limited resolution. Alberta Biomedical Engineering Conference.
    • Adam M, Amini M, Kontulainen SA, Johnston JD (2013). Validation of subject-specific microFE model for off-axis fracture of intact distal radial bone. Alberta Biomedical Engineering Conference.
    • Amini M, Nazemi M, Kontulainen SA, Wilson DR, Johnston JD (2013). Validation of proximal tibial FE model in prediction of subchondral bone stiffness. Alberta Biomedical Engineering Conference.
    • Nazemi M, Amini M, Kontulainen SA, Milner J, Holdsworth D, Masri B, Wilson D, Johnston JD (2013). Prediction of human proximal tibial subchondral bone stiffness using quantitative computed tomography-based finite element technique. Canadian Congress for Applied Mechanics.
    • Amini M, Szyszkowski W, Lanovaz J, Johnston JD (2013). A parametric axi-symmetric finite element simulation study on mechanics of the proximal tibia bone in normal and osteoarthritic conditions. Canadian Congress for Applied Mechanics.
    • Wang Y, Johnston JD, Dolovich AT (2013). Stable solution of nonlinear equations by combining a modified Newton-Raphson method with the Vector Epsilon algorithm. Canadian Congress for Applied Mechanics.
    • Amini M, Lanovaz J, Szyszkowski W, Johnston JD (2012). Stiffness of the proximal tibial bone in osteoarthritic conditions: a parametric simulation study. Canadian Society for Biomechanics Meeting. (32).
    • Burnett, W., Kontulainen, S., McLennan, C., Wheaton, D., Talmo, C., Hunter, D., Wilson, D. and Johnston, J. (2012). Patella density is lower in knee osteoarthritis patients experiencing pain at rest., Canadian Orthopaedic Research Society, Ottawa, Ontario, June 8-10.
    • Amini, M., Lanovaz, J., Szyszkowski, W. and Johnston, J. (2012). Stiffness of the proximal tibial bone in osteoarthritic conditions: a parametric simulation study, Canadian Society for Biomechanics, Vancouver, British Columbia, June 6-9, Paper No. 320/44.
    • Kontulainen, S., Jackowski, S., Lanovaz, J., Johnston, J. and Baxter-Jones, A. (2011). Sex-Specificity in Femoral Neck Growth during Adolescence and Young Adulthood: Evidence from 15-Years of Longitudinal Data., American Society for Bone and Mineral Research, San Diego, California, September 16-20.
    • Kawalilak, C., Lanovaz, J., Johnston, J., Baxter-Jones, A. and Kontulainen, S. (2011). Prediction of Forearm Impact Forces during Falls on the Outstretched Hand., American Society for Bone and Mineral Research, San Diego, California, September 16-20.
    • Johnston, J., Gellert, C., McLennan, C., Hunter, D. and Wilson, D. (2011). In vivo precision of computed tomography topographic mapping of subchondral density (CT-TOMASD) in osteoarthritic and normal patellae, Orthopaedic Research Society, Long Beach, CA, USA, 12 January 2011, Paper No. 1604.
    • Johnston, J., Kontulainen, S., Masri, B. and Wilson, D. (2010). Predicting subchondral bone structural properties using a depth-specific CT topographic mapping technique in normal and osteoarthritic proximal tibiae, American Society for Bone and Mineral Research, Toronto, Ontario, CANADA, 16 October 2010, Paper No. SA0045.
    • Kawalilak, C., Johnston, J. and Kontulainen, S. (2010). Precision of skeletal parameters at the distal radius: the influence of resolution using peripheral quantitative computed tomography, American Society for Bone and Mineral Research, Toronto, Ontario, CANADA, 16 October 2010.
    • Johnston, J., Kontulainen, S., Masri, B. and Wilson, D. (2010). Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD) at the Proximal Tibia: Associations with Mechanical Properties, Canadian Orthopaedic Research Society Meeting, Edmonton/AB, June 17-20, Paper No. 363.
    • Johnston, J., Steeves, J., Kontulainen, S., McWalter, E., Masri, B. and Wilson, D. (2010). Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD) in the Patella: Associations with Localized Cartilage Degeneration, Orthopaedic Research Society, New Orleans, LA, USA, March 6-9.
    • Johnston, J., Masri, B. and Wilson, D. (2009). In vivo precision of computed tomography topographic mapping of subchondral density (CT-TOMASD) in the proximal tibia., International Society for Technology in Arthroplasty, Big Island, Hawaii, October 22-24, Paper No. A973.
    • Johnston, J., Kulshreshtha, S., Masri, B. and Wilson, D. (2009). Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD) for Unicompartmental Knee Arthroplasty Pre-operative Planning, International Society for Technology in Arthroplasty, Big Island, Hawaii, October 22-24, Paper No. A972.
    • Lorbergs, A., Johnston, J., Baxter-Jones, A. and Kontulainen, S. (2009). Does Childhood Forearm Muscle Strength Development Predict Bone Strength in Midlife? Evidence from a 40-year Prospective Study., ASBMR, Denver, Colorado, USA, September 11-14.
    • Johnston, J., Masri, B. and Wilson, D. (2009). Comparison Between CT-TOMASD and CT-OAM for Assessing Osteoarthritic and Normal Tibiae, Canadian Orthopaedic Research Society Meeting, Whistler, BC Canada, July 3-5, Paper No. 32. Available online at: www.coa-aco.org
    • Johnston, J., Connor, P., Baker, S., McLennan, C., Hunter, D. and Wilson, D. (2009). In Vivo Precision of Computed Tomography Topographic Mapping of Subchondral Density (CT-TomasD) in the Proximal Tibia, Orthopaedic Research Society, Las Vegas, Nevada, USA, February 21-25, Paper No. 242. Available online at: http://www.ors.org/web/Transactions/55/0242.PDF
    • Johnston, J., Masri, B. and Wilson, D. (2009). Computed Tomography Topographic Mapping of Subchondral Density (CT-TomasD) in Osteoarthritic and Normal Tibiae: In Vitro Precision, Comparative Assessment and Preliminary Findings, Orthopaedic Research Society, Las Vegas, Nevada, USA, February 21-25, Paper No. 2137. Available online at: http://www.ors.org/web/Transactions/55/2137.PDF
    • Lorbergs, A., Jackowski, S., Bennett, C., Johnston, J. and Kontulainen, S. (2008). Precision of pQCT Measurements of Bone and Muscle Area in the Forearm and Lower Limb., ASBMR, Montreal, Quebec, Canada, September 12-16, Paper No. Su279. Available online at: www.abstractsonline.com
    • Kontulainen, S., Lorbergs, A. and Johnston, J. (2008). Validating pQCT Muscle Cross-Sectional Area Measurement., ASBMR, Montreal, Quebec, Canada, September 12-16, Paper No. Su278. Available online at: www.abstractsonline.com
    Conference Presentations / Poster Presentations
    • Liao, L., Johnston, J., Leswick, D., Nguyen, N. and Kontulainen, S. (2012). In vivo precision of magnetic resonance imaging at proximal femoral neck., Bone and joint Imaging Group (BIG) Research Day, Saskatoon, Saskatchewan, March 23.
    • Kawalilak, C., Johnston, J. and Kontulainen, S. (2012). Short-term in vivo precision of bone density and micro architecture at the distal radius and tibia using HR-pQCT: a comparison between young and older aged adults., Bone and joint Imaging Group (BIG) Research Day, Saskatoon, Saskatchewan, March 23.
    • Burke, E., Frank, A., Beaulieu, D., Johnston, J. and Kontulainen, S. (2012). Does peripheral quantitative computed tomography (pQCT) measure muscle density reflect muscle adiposity in swine?, Bone and joint Imaging Group (BIG) Research Day, Saskatoon, Saskatchewan, March 23.
    • Duckham, R., Baxter-Jones, A., Bailey, D., Faulkner, R., Johnston, J. and Kontulainen, S. (2012). Physical activity in adolescence maybe associated with larger total and cortical area and greater bone strength., Bone and joint Imaging (BIG) Research Day, Saskatoon, Saskatchewan, March 23.
    • Nazemi, M., Lanovaz, J. and Johnston, J. (2012). Quantitative Computed Tomography (QCT) Image Based Finite Element Modeling (FEM) of Human Proximal Tibia, University of Saskatchewan Health Sciences Research Day, Saskatoon, Saskatchewan, March 9.
    • Plesman, R., Sharma, A., Gilbert, P., Campbell, J., Johnston, J., Shmon, C. and Linn, K. (2012). Canine biomechanics and radiographic anatomic landmarks of the stifle, University of Saskatchewan Health Sciences Research Day, Saskatoon, Saskatchewan, March 9.
    • Steeves, J., Kontulainen, S. and Johnston, J. (2009). Contrast-enhanced computed tomography (CECT) of articular cartilage. Associations with cartilage GAG content and mechanical properties., NSERC Undergraduate Student Research Poster Event, Saskatoon/SK, August 28.
    • Glennie, D., Liu, Y., Aydt, J., Lanovaz, J., Kontulainen, S. and Johnston, J. (2009). Fall Impact Simulator for Assessing Injury, University of Saskatchewan 16th Annual Life & Health Sciences Research Day (1st Prize Winner - Diagnostic Science), Saskatoon, Saskatchewan, Canada., March 13, Paper No. 29.

    Research Grants

    2016-2017

    • Principal Investigator, Novel imaging metrics and finite element methods for assessing role of bone in osteoarthritis, NSERC, Discovery Grant.
    • Co-Investigator, Animal-assisted Intervention, physical activity and musculoskeletal health in children with autism spectrum disorder (Dog PAAL), UofS One Health Initiative Grant
    • Contract, Analysis of Multicenter Osteoarthritis Study (MOST) Data

    2015-2016

    • Principal Investigator, Novel imaging metrics and finite element methods for assessing role of bone in osteoarthritis, NSERC, Discovery Grant.
    • Co-Investigator, Using biomechanical testing and imaging techniques to investigate toe tip necrosis related claw lesions in feedlot cattle, Ministry of Agriculture, Province of Saskatchewan, Agriculture Development Fund
    • Co-Investigator, Revealing Origins of Osteoporosis in Teens (ROOT) Pilot, UofS CIHR Bridge Funding
    • Contract, Analysis of Multicenter Osteoarthritis Study (MOST) Data

    2014-2015

    • Co-Principal Investigator, A novel surgical means to stabilize distal radius fractures during bone healing, Royal University Hospital, Foundation Research Grant. 
    • Principal Investigator, Novel imaging metrics and finite element methods for assessing role of bone in osteoarthritis, NSERC, Discovery Grant.
    • Principal Investigator, Data Acquisition System for Linking Tissue Mechanics with Imaging and Computational Modeling, NSERC, Research Tools and Infrastructure.
    • Principal Investigator, Linking Tissue Mechanics with Imaging, NSERC, Discovery Grant.
    • Co-Investigator, Using biomechanical testing and imaging techniques to investigate toe tip necrosis related claw lesions in feedlot cattle, Ministry of Agriculture, Province of Saskatchewan, Agriculture Development Fund
    • Co-Investigator, Revealing Origins of Osteoporosis in Teens (ROOT) Pilot, UofS CIHR Bridge Funding

    2013-2014

    • Principal Investigator, Linking Tissue Mechanics with Imaging, NSERC, Discovery Grant.

    2012-2013

    • Principal Investigator, Linking Tissue Mechanics with Imaging, NSERC, Discovery Grant.
    • Principal Investigator, Enhancing Predictions of Distal Radius Bone Strength: a Validation Study Linking Mechanical Testing, FEM and Imaging, SHRF, New Investigator.

    2011-2012

    • Principal Investigator, Enhancing Predictions of Distal Radius Bone Strength: a Validation Study Linking Mechanical Testing, FEM and Imaging, SHRF, New Investigator.
    • Principal Investigator, Linking Tissue Mechanics with Imaging, NSERC, Discovery Grant.
    • Principal Investigator, Material Testing Facility for Bone Health Research, CFI, Leaders Opportunity Fund (LOF).
    • Principal Investigator, Predicting distal radius bone strength using diffraction enhanced x-ray imaging, University of Saskatchewan, CIHR Training Grant - THRUST / Synchrotron Training Program.
    • Co-Investigator, Bone and Joint Imaging Group, SHRF, Team Grant (Phase II).

    2010-2011

    • Principal Investigator, Enhancing Predictions of Distal Radius Bone Strength: a Validation Study Linking Mechanical Testing, FEM and Imaging, SHRF, New Investigator.
    • Principal Investigator, Linking Tissue Mechanics with Imaging, NSERC, Discovery Grant.
    • Principal Investigator, Servo-hydraulic Axial-Torsional Material Testing System, SHRF, Equipment Grant.
    • Co-Investigator, Bone and Joint Imaging Group, SHRF, Team Grant (Phase II).
    • Co-Investigator, Bone health and fracture Prevention Across the LifeSpan (BonePALS) Team: Understanding Bone Architecture and Strength, CIHR IMHA, Team Grant.

    2009-2010

    • Principal Investigator, Accurate 3D Digitizer Linking Tissue Mechanics with Imaging, NSERC, RTI.
    • Principal Investigator, Characterizing Subchondral Bone Density in Individuals with Knee Osteoarthritis, Canadian Arthritis Network (CAN), Pilot Grant Program.
    • Principal Investigator, Linking Tissue Mechanics with Imaging, NSERC, Discovery Grant.
    • Principal Investigator, Linking Tissue Mechanics with Imaging, UofS, Bridge Fund.
    • Principal Investigator, Linking Tissue Mechanics with Imaging, UofS, USTEP.
    • Co-Investigator, Bone and Joint Imaging Group, Saskatchewan Health Research Foundation (SHRF), Research Group Development.
    • Co-Investigator, Carpal flexion following partial carpal arthrodesis--- an in vitro cadaver study, Western College of Veterinary Medicine (WCVM), Equine Health Research Fund.
    • Co-Investigator, Revealing the Role of Adolescent Growth, Bone Accrual and Physical Activity to Adult Bone Strength at the Wrist and Hip, CIHR, Operating Grant.

    2008-2009

    • Co-Principal Investigator, Advanced Imaging of Human Bone and Joints, CFI, New Opportunities Fund.
    • Principal Investigator, Contrast-Enhanced Imaging of Cartilage Biochemistry, UofS, USTEP.
    • Principal Investigator, Generation of Subject-Specific Biomechanical Models for Musculoskeletal Applications, UofS, Proposal Development Grant.
    • Co-Investigator, Bone and Joint Imaging Group, Saskatchewan Health Research Foundation (SHRF), Research Group Development.
    • Co-Investigator, Revealing the Role of Adolescent Growth, Bone Accrual and Physical Activity to Adult Bone Strength at the Wrist and Hip, CIHR, Operating Grant.

    Teaching

    2015-2016

    • ME 314 Machine Design
    • ME 316 Dynamics & Vibrations
    • ME 495 Mechanical Engineering Design II
    • ME 328 Mechanical Engineering Laboratory (Laboratory S6)
    • ME 328 Mechanical Engineering Laboratory (Laboratory S7)
    • EPIP – Mechanical – Supervisor

    2014-2015

    • Sabbatical

    2013-2014

    • ME 314 Machine Design
    • ME 316 Dynamics & Vibrations
    • ME 495 Mechanical Engineering Design II
    • ME 318 Mechanical Engineering Laboratory (Laboratory S2)
    • ME 328 Mechanical Engineering Laboratory (Laboratory S6)
    • ME 328 Mechanical Engineering Laboratory (Laboratory S7)
    • EPIP – Mechanical – Supervisor

    2012-2013

    • ME 314 Machine Design
    • ME 316 Dynamics & Vibrations
    • ME 495 Mechanical Engineering Design II
    • ME 318 Mechanical Engineering Laboratory (Laboratory S2)
    • ME 328 Mechanical Engineering Laboratory (Laboratory S6)
    • ME 328 Mechanical Engineering Laboratory (Laboratory S7)

    2011-2012

    • ME314.3 - Machine Design I
    • ME316.3 - Dynamics and Vibrations
    • ME318.3 - Mechanical Engineering Laboratory I (Laboratory S2)
    • ME328.3 - Mechanical Engineering Laboratory II (Laboratory S6)
    • ME328.6 - Mechanical Engineering Laboratory II (Laboratory S7)
    • ME495.6 - Industrial Design Project

    2010-2011

    • ME314.3 - Machine Design I
    • ME316.3 - Dynamics and Vibrations
    • ME318.3 - Mechanical Engineering Laboratory I (Laboratory S2)
    • ME328.3 - Mechanical Engineering Laboratory II (Laboratory S6)
    • ME328.6 - Mechanical Engineering Laboratory II (Laboratory S7)
    • ME495.6 - Industrial Design Project

    2009-2010

    • ME314.3 - Machine Design I
    • ME328.6 - Mechanical Engineering Laboratory II - S6
    • ME328.6 - Mechanical Engineering Laboratory II - S7
    • ME495.6 - Industrial Design Project
    • ME990 - Graduate Seminar
    • ME994 - Thesis
    • ME996 - Thesis

    2008-2009

    • ME328.6 - Mechanical Engineering Laboratory II - S6
    • ME328.6 - Mechanical Engineering Laboratory II - S7
    • ME495.6 - Industrial Design Project
    • ME990 - Graduate Seminar

    Research Projects

    2015-2016

    • Mechanical Testing of Bone
    • Finite Element Analyses of Bone
    • Peripheral Quantitative Computed Tomography (pQCT) Analyses of Bone, Fat & Muscle
    • Quantitative Computed Tomography (QCT) Analyses of Osteoarthritic Knees
    • Knee Brace Design
    • Wrist Implant Design
    • Bovine Toe Tip Necrosis

    2014-2015

    • Finite Element Analyses of Bone
    • Mechanical Testing of Bone
    • MRI Analyses of Femoral Neck Structure and Strength
    • Peripheral Quantitative Computed Tomography (pQCT) Analyses of Bone, Fat & Muscle
    • Quantitative Imaging of Subchondral Bone Using Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD)

    2013-2014

    • Research Projects (2013-2014)
    • Biomechanics of Forward and Backward Falling
    • Finite Element Analyses of Bone
    • Mechanical Testing of Bone
    • MRI Analyses of Femoral Neck Structure and Strength
    • Peripheral Quantitative Computed Tomography (pQCT) Analyses of Bone, Fat & Muscle
    • Quantitative Imaging of Subchondral Bone Using Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD)

    2012-2013

    • Biomechanics of Forward and Backward Falling
    • Finite Element Analyses of Bone
    • Mechanical Testing of Bone
    • MRI Analyses of Femoral Neck Structure and Strength
    • Peripheral Quantitative Computed Tomography (pQCT) Analyses of Bone, Fat & Muscle
    • Quantitative Imaging of Subchondral Bone Using Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD)

    2011-2012

    • Biomechanics of Forward and Backward Falling
    • Finite Element Analyses of Bone
    • Flexible Multibody Dynamics
    • Mechanical Testing of Bone
    • MRI Analyses of Femoral Neck Structure and Strength
    • Peripheral Quantitative Computed Tomography (pQCT) Analyses of Bone, Fat & Muscle
    • Quantitative Imaging of Subchondral Bone Using Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD)

    2010-2011

    • Biomechanics of Forward and Backward Falling
    • Finite Element Analyses of Bone
    • Flexible Multibody Dynamics
    • Mechanical Testing of Bone
    • MRI Analyses of Femoral Neck Structure and Strength
    • Peripheral Quantitative Computed Tomography (pQCT) Analyses of Bone, Fat & Muscle
    • Quantitative Imaging of Subchondral Bone Using Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD)

    2009-2010

    • Biomechanics of Forward and Backward Falling
    • Finite Element Analyses of Subchondral Bone
    • Linking Bone and Cartilage Tissue Mechanics with Imaging
    • Mechanical Indentation of Osteoarthritic Subchondral Bone
    • MRI Analyses of Femoral Neck Geometry
    • Peripheral Quantitative Computed Tomography (pQCT) Analyses of Bone, Fat & Muscle
    • Quantitative Imaging of Cartilage Biochemistry Using Contrast Enhanced Computed Tomography (CECT)
    • Quantitative Imaging of Subchondral Bone Using Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD)

    2008-2009

    • Biomechanics of Forward and Backward Falling
    • Finite Element Analyses of Subchondral Bone
    • Linking Bone and Cartilage Tissue Mechanics with Imaging
    • Optimized Preoperative Planning of Unicompartmental Knee Arthroplasty
    • Peripheral Quantitative Computed Tomography (pQCT) Analyses of Bone, Fat & Muscle
    • Quantitative Imaging of Cartilage Biochemistry Using Contrast Enhanced Computed Tomography (CECT)
    • Quantitative Imaging of Subchondral Bone Using Computed Tomography Topographic Mapping of Subchondral Density (CT-TOMASD)