Paper 51: A Radiostereometric Analysis of Tendon Migration following Arthroscopic and Mini-Open Biceps Tenodesis: Interference Screw confers Greater Construct Stability than All-Suture Suture Anchor Fixation, with No Difference in Patient-Reported Outcomes

Objectives: To quantify the postoperative migration of BT construct between arthroscopic suprapectoral (ASPBT) and open subpectoral (OSPBT) techniques via interference screw (IS) or all-suture anchor with a single suture (SSSA) fixation radiostereometric analysis (RSA). Methods: Distal biceps tendon following OSPBT Polyetheretherketone (PEEK) IS, one SSSA, ASPBT PEEK two SSSAs was measured prospectively. Patients symptomatic tendinopathy preoperative Patient-Reported Outcome Measures (PROMs) including CMS, SANE, PROMIS-UE scores were included. A tantalum bead sutured on proximal end long head before fixation. AP radiographs performed immediately postoperatively, 1 week, 3 months. Bead measured, PROMs compared. Results: Of 115 patients, 94 available for final follow-up (82%). Average age 52.1±10.5 years, BMI 30.8±5.4 kg/m2. There no difference in an IS (P=0.70). SSSA (21.70 mm) demonstrated significantly greater than (4.31mm, P<0.001) (5.04 mm, P<0.001). Three patients (9.4%) who had (3.8%), developed Popeye deformity; none occurred groups. Mean 12-week versus without deformity 60.8 mm 11.2 respectively (P<0.0001). did not differ at follow-up. Conclusions: least migration, while yielded most. Compared to one, but two, resulted migration. 6.1cm. minimize when using SSSAs, 2 sutures should be used interlocking pattern within tendon. [Table: see text]