Ruiz Iban, Miguel AngelSanchez Alepuz, EduardoDiaz Heredia, JorgeHachem, Abdul-IlahEzagüi Bentolila, LeonCalvo, AngelVerdú, CarlosRus Aznar, Ignacio deSoler Romagosa, Francesc2021-02-152021-02-152020-06-01https://hdl.handle.net/2445/173937Purpose: To evaluate if adding nanofractures to the footprint of a supraspinatus tear repair would have any effect in the outcomes at one-year follow-up. Methods: Multicentric, triple-blinded, randomized trial with 12-months follow-up. Subjects with isolated symptomatic reparable supraspinatus tears smaller than 3 cm and without grade 4 fatty infiltration were included. These were randomized to two groups: In the Control group an arthroscopic supraspinatus repair was performed; in the Nanofracture group the footprint was additionally prepared with nanofractures (1 mm wide, 9 mm deep microfractures). Clinical evaluation was done with Constant score, EQ-5D-3L, and Brief Pain Inventory. The primary outcome was the retear rate in MRI at 12-months follow-up. Secondary outcomes were: characteristics of the retear (at the footprint or at the musculotendinous junction) and clinical outcomes. Results: Seventy-one subjects were randomized. Two were lost to follow-up, leaving 69 participants available for assessment at 12-months follow-up (33 in the Control group and 36 in the Nanofracture Group). The Nanofracture group had lower retear rates than the Control group (7/36 [19.4%] vs 14/33 [42.4%], differences significant, p = 0.038). Retear rates at the musculotendinous junction were similar but the Nanofracture group had better tendon healing rates to the bone (34/36 [94.4%] vs. 24/33 [66.71%], p = 0.014). Clinically both groups had significant improvements, but no differences were found between groups. Conclusion: Adding nanofractures at the footprint during an isolated supraspinatus repair lowers in half the retear rate at 12-months follow-up. This is due to improved healing at the footprint.8 p.application/pdfengcc by (c) Ruiz Ibán et al., 2020http://creativecommons.org/licenses/by/3.0/es/ArtroscòpiaEspatllaFracturesArthroscopyShoulderFracturesinfo:eu-repo/semantics/article2021-02-12info:eu-repo/semantics/openAccess32488368