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Erschienen in:
01.05.2015 | Scientific Article
Repair of distal biceps brachii tendon assessed with 3-T magnetic resonance imaging and correlation with functional outcome
Erschienen in: Skeletal Radiology | Ausgabe 5/2015
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Objective
Objectives were to study the MRI appearance of the repaired distal biceps tendon (DBT), anatomically reinserted, and to search for a correlation between tendon measurements and functional results.
Materials and methods
Twenty-five patients (mean age, 49 ± 4.9 years old) who benefited from 3-T MRI follow-up of the elbow after surgical reinsertion of the DBT were retrospectively included and compared to a control group (n = 25; mean age, 48 ± 10 years old). MRI was performed during the month of clinical follow-up and on average 22 months after surgery. Delayed complications (secondary avulsion, new rupture), intratendinous osteoma, tendinous signal on T1-weighted (T1w) and fat-suppressed proton density-weighted (FS-PDw) images as well as DBT measurements were recorded. The maximum isometric elbow flexion strength (MEFS) and range of motion of the elbow were assessed.
Results
Repaired DBT demonstrated a heterogeneous but normally fibrillar structure. Its low T1w signal was less pronounced than that of normal tendons, and the FS-PDW image signal was similar to that of T1w images. MRI detected seven osteomas (Se = 53 % vs. plain radiography), one textiloma and one secondary avulsion. Repaired DBT measurements were significantly correlated with MEFS (dominant arm R2: 0.38; nondominant arm R2: 0.54); this correlation involved the insertion surface (Δ = −75.7 mm2, p = 0.046), transverse diameter (Δ = −2.6 mm, p = 0.018), anteroposterior diameter at the level of the radial head (Δ = −3.9 mm, p = 0.001) and DBT cross-sectional area (Δ = −50.2 mm2, p = 0.003).
Conclusion
The quality of functional outcome after anatomical elbow rehabilitation of DBT correlates with the extent of tendinous hypertrophy during the healing process.