[Functional comparison between arthroscopy and open surgery for rotator cuff injuries].

Background: Rotator cuff injuries result in impaired functionality of the shoulder. The difference in shoulder functionality in patients treated with arthroscopy who required open surgery is still unknown.

Objective: To determine if there is a difference in the functional evolution of the shoulder in patients who underwent surgery due to rotator cuff lesion which began with arthroscopy and ended in open surgery.