Radiostereometric Analysis Of Biceps Tenodesis: A Comparison Of Techniques

Abstract

Objectives: Arthroscopic biceps tenodesis (BT) is a common surgical procedure for treatment of anterior shoulder pain due to long head of the biceps pathology. BT can be accomplished via several different techniques. There continues to be a paucity of literature comparing the different techniques and fixation devices. The purpose of this study was to compare 4 different techniques for accomplishing a BT utilizing radiostereometric analysis. Methods: This study was a prospectively enrolled non-randomized trial of patients undergoing BT. All patients were treated at a single institution by 1 of 4 surgeons. Four different techniques were analyzed, 1) open BT with screw fixation, 2) open BT with single anchor fixation, 3) arthroscopic BT with screw fixation, and 4) arthroscopic BT with two suture anchor fixation. After the BT was completed a tantalum bead was sewn to the long head of the biceps tendon. This bead acted as a marker of the position of the biceps tendon. X-rays were taken during surgery while the patient remained sedated to establish time zero bead position. Follow up x-rays were completed at the patients 1st post-operative visit and 12 week post-operative visit. Position of the bead was measured at each time point in mm from the proximal most point of the humerus to its position distally. Results: A total of 60 patients were included in the analysis, with 15 patients in each of the 4 groups. Final bead position differed significantly for the open and arthroscopic techniques (107.35±20.39mm, 65.64±23.69mm, p<0.001), but did not differ significantly between the two open techniques and the two arthroscopic technique (p>0.05). The open technique resulted in 7.69±5.98mm of distal migration while the arthroscopic technique resulted in a similar amount of distal migration, 8.93±2.71mm. Conclusion: Short-term radiographic outcomes following open and arthroscopic biceps tenodesis revealed that each technique results in stable fixation of the tendon with minimal migration. Although a statistically significant migration occurred, this is likely clinically insignificant. This initial migration observed could be due to increased tensioning of the tendon when the patient is awake versus sedated.