Abstract
Background
Currently, the movement that occurs at the site of soft tissue repair cannot be measured accurately in vivo. Radiostereometric analysis (RSA) is the gold standard for measuring movement between two skeletal segments in vivo but its application to studying soft tissue migration has been limited by the unknown stability of tantalum beads in tendons and ligaments and their ability to define rigid bodies in these structures.
Hypothesis
RSA can be used to accurately measure movement between two tendon segments or between a bony and a tendon segment in vivo.
Methods of Study
The stability of tantalum beads and the ability to use such beads to define rigid bodies in some soft tissues will be investigated in animal models of tendon repair. Several tantalum bead insertion techniques will be tested using in vivo RSA measurements of bead movement followed by morphologic studies of the repaired tendon and soft tissue reaction to the tantalum beads.
Significance
RSA performed on tantalum beads encapsulated in muscles and tendons could be a powerful new tool to study the in vivo motion at the site of soft tissue repairs, for instance, the tendon gap formation. If RSA could be used to evaluate the efficiency of different tendon repair techniques in vivo, enhanced rehabilitation protocols could be developed and complications associated with prolonged protection or failure of repair could be reduced.
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Acknowledgments
We thank our ORS mentors Drs D. W. Howie and D. M. Findlay and the entire faculty of the 5th ORS Grant Writing Workshop, February 2009, Las Vegas, NV, for the educational value in building this project. We also thank K. Fraser and Dr Z. Gu for helping with the preliminary results reported in this article.
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Each author certifies that he or she has no commercial associations (eg, consultancies, stock ownership, equity interest, patent/licensing arrangements, etc) that might pose a conflict of interest in connection with the submitted article.
Each author certifies that his or her institution approved the animal protocol for this investigation and that all investigations were conducted in conformity with ethical principles of research.
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Solomon, L.B., Callary, S.A. Emerging Ideas: Soft Tissue Applications of Radiostereometric Analysis. Clin Orthop Relat Res 469, 1512–1516 (2011). https://doi.org/10.1007/s11999-010-1681-1
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DOI: https://doi.org/10.1007/s11999-010-1681-1