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From the Lahey Clinic, Burlington, Massachusetts, the J Vernon Luck Center for Orthopaedic Research, Los Angeles Orthopaedic Hospital/UCLA, Los Angeles, California, and the Kerlan-Jobe Orthopaedic Clinic, Los Angeles, California
* Address correspondence to Stephen E. Lemos, Lahey Clinic, 41 Mall Road, Burlington, MA 01805 (e-mail: stephen.e.lemos{at}lahey.org).
Background: Suture anchor and bone tunnel fixations are used for distal biceps tendon repairs and have not been compared.
Hypothesis: Suture anchor fixation is equal or superior to bone tunnel fixation.
Study Design: Randomized controlled in vitro study.
Methods: A new fixation technique was compared to traditional bone tunnel fixation of distal biceps tendon ruptures between randomly selected sides of nine matched-pair, fresh-frozen elbow specimens from cadaveric donors (mean age = 74.7 years). Bone densities were determined. The distal biceps tendon was attached to the actuator of a servohydraulic load frame and loaded to tensile failure at a constant rate of 4 mm/sec. Bone density, sex, age, side, tuberosity area, repair, failure type, repair stiffness, and yield strength were compared.
Results: Superior yield strength of suture anchor fixation (263 N) compared to bone tunnel fixation (203 N) (P = 0.0233) were demonstrated. When suture anchor fixation failure (1 of 9) occurred, the matched pair also failed.
Conclusion: Suture anchor fixation offers an equal if not superior alternative to bone tunnel fixation for repair of the distal biceps tendon in the specimens tested.
Clinical Relevance: Suture anchor fixation may be used for distal biceps tendon repairs.
Key Words: distal biceps tendon rupture • suture anchor • two-incision technique
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