A 35-year-old patient presents with right calf weakness of approximately six weeks duration. The patient noted a pop in the back of their heel when carrying a heavy box up a flight of stairs. In the office, there is an approximately 3 cm palpable defect in the posterior heel cord. When examined in the prone position the foot rests in greater dorsiflexion compared to the contralateral. Which procedure will most likely need to be performed at the time of surgical repair?