The efficacy of using vibrometry to detect osteointegration of the Agility total ankle

• Published in: Journal of biomechanics 2010-06, Vol.43 (9), p.1840-1843
• Main Authors: Dahl, Michael C, Kramer, Patricia A, Reinhall, Per G, Benirschke, Stephen K, Hansen, Sigvard T, Ching, Randal P
• Format: Article
• Language: English
• Subjects: Ankle; Ankle Joint - diagnostic imaging; Ankle Joint - physiopathology; Ankle Joint - surgery; Arthroplasty; Biological and medical sciences; Biomechanics. Biorheology; Cadaver; Cardiovascular system; Design; Equipment Failure Analysis - methods; Fourier transforms; Fundamental and applied biological sciences. Psychology; Humans; Image Interpretation, Computer-Assisted - methods; Investigative techniques, diagnostic techniques (general aspects); Joint Prosthesis; Joint surgery; Lasers; Medical sciences; Orthopedic surgery; Osseointegration; Osteointegration; Physical Medicine and Rehabilitation; Prostheses; Prosthesis Design; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases; Tissues, organs and organisms biophysics; Transplants & implants; Ultrasonic imaging; Ultrasonic investigative techniques; Ultrasonic transducers; Ultrasonography - methods; Ultrasound; Vibration; Vibrometry
• ISSN: 0021-9290; 1873-2380
• DOI: 10.1016/j.jbiomech.2010.02.019

Abstract Arthritis is a chronic, debilitating disease affecting one in six people in the United States annually. One of the most promising surgical treatments is total joint replacement. After decades of development, some joint replacement (arthroplasty) systems such as the hip and knee enjoy high success rates while others, particularly newer ones for the ankle, have disappointing survival rates. The goal of this study was to investigate, develop, and test a methodology to assess implant osteointegration, specifically for the talar component of a total ankle prosthesis. A vibrometry technique using Doppler ultrasound was developed to non-invasively determine osteointegration clinically. This methodology was evaluated via preliminary experimentation, along with another validation methodology, to access whether design criteria have been met in order to initiate a clinical study of the technique. Bench-top and cadaveric testing demonstrated that the Doppler ultrasound technique could distinguish the level of osteointegration between loose and fixed implant components. The laser vibrometry technique, used for the validation of the ultrasound technique intraoperatively, was also shown to be functional and indicative of the ultrasound technique’s testing results. This methodology can provide a much needed tool to determine the integration of implants non-invasively in the clinical and surgical setting, thus allowing each patient’s rehabilitation program to be monitored and tailored to maximize the osteointegration and survival rate of their total joint replacement.