Although single-loop tibialis tendon allografts have increased in popularity owing to their many advantages over patellar tendon and double-loop hamstring tendon autografts, some percentage of the patient population do not have clinically stable knees following anterior cruciate ligament reconstruction with single-loop tibialis tendon allografts. Therefore, it would be advantageous to determine the causes of increased anterior laxity which ultimately must be traced to lengthening of the graft construct. One objective of this study was to demonstrate the feasibility of using Roentgen stereophotogrammetric analysis (RSA) to determine the causes of lengthening of a single-loop graft construct subjected to cyclic loading. A second objective was to determine which cause(s) contributes most to an increase in length of this graft construct. Radio-opaque markers were inserted into ten grafts to measure the lengthening at the sites of the tibial and femoral fixations and between the sites of fixation. Each graft was passed through a tibial tunnel in a calf tibia, looped around a rigid cross-pin, and fixed to the tibia with a Washerloc fixation device. The grafts were cyclically loaded for cycles from . Prior to and at intervals during the cyclic loading, simultaneous radiographs were taken. RSA was used to determine the three-dimensional coordinates of the markers from which the lengthening at the sites of fixation and between the sites of fixation was computed at each interval. The sites of the femoral and tibial fixations were the largest contributors to the increase in length of the graft construct, with maximum average values of 0.68 and mm, respectively, after cycles. The graft substance between the sites of fixation contributed least to lengthening of the graft, with a maximum average value of mm. Ninety percent of the maximum average values occurred before cycles of loading for the largest contributors. RSA proved to be a useful method for measuring lengthening due to all three causes. Lengthening of the graft construct at the sites of both fixations is sufficiently large that the combined contributions may manifest as a clinically important increase in anterior laxity.
Skip Nav Destination
Article navigation
June 2006
Technical Papers
Lengthening of a Single-Loop Tibialis Tendon Graft Construct After Cyclic Loading: A Study Using Roentgen Stereophotogrammetric Analysis
Conrad Kay Smith,
Conrad Kay Smith
Biomedical Engineering Program,
University of California
, Davis, CA 95616
Search for other works by this author on:
M. L. Hull,
M. L. Hull
Department of Mechanical Engineering, and Biomedical Engineering Program,
University of California
, Davis, CA 95616
Search for other works by this author on:
S. M. Howell
S. M. Howell
Department of Mechanical Engineering,
University of California
, Davis, CA 95616
Search for other works by this author on:
Conrad Kay Smith
Biomedical Engineering Program,
University of California
, Davis, CA 95616
M. L. Hull
Department of Mechanical Engineering, and Biomedical Engineering Program,
University of California
, Davis, CA 95616
S. M. Howell
Department of Mechanical Engineering,
University of California
, Davis, CA 95616J Biomech Eng. Jun 2006, 128(3): 437-442 (6 pages)
Published Online: November 16, 2005
Article history
Received:
May 17, 2005
Revised:
November 16, 2005
Citation
Smith, C. K., Hull, M. L., and Howell, S. M. (November 16, 2005). "Lengthening of a Single-Loop Tibialis Tendon Graft Construct After Cyclic Loading: A Study Using Roentgen Stereophotogrammetric Analysis." ASME. J Biomech Eng. June 2006; 128(3): 437–442. https://doi.org/10.1115/1.2187038
Download citation file:
Get Email Alerts
Simulating the Growth of TATA-Box Binding Protein-Associated Factor 15 Inclusions in Neuron Soma
J Biomech Eng (December 2024)
Related Articles
Roentgen Stereophotogrammetric Analysis Methods for Determining Ten Causes of Lengthening of a Soft-Tissue Anterior Cruciate Ligament Graft Construct
J Biomech Eng (August,2008)
Can Markers Injected Into a Single-Loop Anterior Cruciate Ligament Graft Define the Axes of the Tibial and Femoral Tunnels? A Cadaveric Study Using Roentgen Stereophotogrammetric Analysis
J Biomech Eng (August,2008)
Determination of Optimal Graft Lengths for Posterior Cruciate Ligament Reconstruction—A Theoretical Analysis
J Biomech Eng (April,2003)
Related Chapters
Novel and Efficient Mathematical and Computational Methods for the Analysis and Architecting of Ultralight Cellular Materials and their Macrostructural Responses
Advances in Computers and Information in Engineering Research, Volume 2
Application of Non-Linear Elastic Wave Spectroscopy (NEWS) to In Vitro Damage Assessment in Cortical Bone
Biomedical Applications of Vibration and Acoustics in Imaging and Characterizations
Computer Aided Oracle Bone Inscriptions Textual Research Based on Ontology
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3