ME Faculty Candidate Amy Lenz Research Seminar
- Monday, February 25, 2019 at 3:10pm
- Roberts Hall, 312A - view map
Experimental and Computational Methods in Biomechanics to Evaluate Ankle Morphology and Surgical Interventions
University of Utah – Postdoctoral Research Associate Orthopaedic Research Laboratory
Abstract: Tibiotalar osteoarthritis (OA) affects 100,000 individuals per year, and represents a serious burden on our healthcare system. Most cases of tibiotalar OA are secondary to trauma, and thus, patients are typically younger than those with knee OA. Eliminating pain and restoring mobility in the younger patient is critical. Regardless, following surgical intervention and due to the nature of a post-traumatic injury, adjacent joints such as the subtalar joint, are susceptible to secondary OA but the onset can be a vast range in reported years post-surgical intervention. While patient reported outcomes and plain film radiographs are a standard clinical tool, they do not quantitatively evaluate a patient’s morphology and dynamic movement to describe mechanical factors to explain the varied onset of subtalar joint OA following arthrodesis (ankle fusion). Historically, our understanding of the morphology of the ankle joint complex (i.e., tibia, talus, and calcaneus) has been derived primarily from 2D measurements of plain film radiographs. The advent of volumetric imaging, including CT and MRI has made it possible to generate 3D reconstructions of the bones of the ankle joint complex. Weightbearing CT scans provide an added benefit to assess pathology such as malalignment, impingement, and joint space narrowing that may be undiagnosed without the presence of load. An augmented understanding of the spectrum of hindfoot deformities could assist in the treatment of patients with conditions such as chronic ankle instability and post-traumatic ankle osteoarthritis as well as provide information to assist in pre-operative planning for procedures such as total ankle replacement and ankle fusion.
Bio: Dr. Amy Lenz is currently a postdoctoral research associate at the University of Utah in the department of Orthopaedics. Her research interests include biomechanics of human movement following ankle surgical intervention and amputation. In 2010, she earned a BS in Biomedical Engineering with Honors in Research at the University of Wisconsin-Madison in Madison, WI. For her masters, she worked in Mechanical Engineering at the University of Delaware in Newark, DE and earned her MSME in 2012. Following, she worked at Mary Free Bed Rehabilitation Hospital in the Motion Analysis Center as a clinical gait lab engineer for five years in Grand Rapids, MI. While collaborating with Mary Free Bed, Dr. Lenz pursued her PhD in Engineering Mechanics at Michigan State University in East Lansing, MI. She earned her PhD in 2017. Her dissertation research quantified residual limb kinematics and kinetics for transtibial amputees with experimental and modeling approaches to evaluate fit and concerns related to ulcer formation. In August 2017, Dr. Lenz joined Dr. Andrew Anderson’s laboratory at the University of Utah as a postdoctoral researcher. Her recent experimental research focus is using dual-fluoroscopy and CT to measure in-vivo joint kinematics following total ankle replacement and ankle fusion. Her computational research is implementing statistical shape modeling to quantify variation in ankle morphology to aid in implant design and diagnosis of degenerative ankle diseases.
- Department of Mechanical & Industrial Engineering