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Acute distal biceps tendon repair reduces fatigue-related pain and minimises loss of forearm supination and elbow flexion strength. We report the short- and long-term outcome following repair using an EndoButton technique. Between 2010 – 2018, 102 patients (101 males; mean age 43 years) underwent acute (□6 weeks) distal biceps tendon repair using an EndoButton technique. The primary short-term outcome was complications. The primary long-term outcome was the Quick-DASH (Q-DASH). Secondary outcomes included the Oxford Elbow Score (OES), EuroQol-5D-3L (EQ-5D), return to function and satisfaction. At mean short-term follow-up of 4 months (2.0 – 55.5) eight patients (7.8%) experienced a major complication and 34 patients (33.3%) experienced a minor complication. Major complications included re-rupture (n=3, 2.9%), unrecovered nerve injury (n=4, 3.9%) and surgery for heterotopic ossification excision (n=1, 1.0%). Three patients (2.9%) required surgery for a complication. Minor complications included neuropraxia (n=27, 26.5%) and superficial infection (n=7, 6.9%). At mean follow-up of 5 years (1 – 9.8) outcomes were collected from 86 patients (84.3%). The median Q-DASH, OES, EQ-5D and satisfaction scores were 1.2 (IQR 0 – 5.1), 48 (IQR, 46 – 48), 0.80 (IQR, 0.72 – 1.0) and 100/100 (IQR, 90 – 100) respectively. Most patients returned to sport (82.3%) and employment (97.6%) following surgery. Unrecovered nerve injury was associated with a poor outcome according to the Q-DASH (p< 0.001), although re-rupture and further surgery were not (p > 0.05). Acute distal biceps tendon repair using an EndoButton technique results in excellent patient reported outcomes and health-related quality of life. Although rare, unrecovered nerve injury adversely affects outcome