Objective: To evaluate functional and quality of life results in patients with unilateral vocal fold paralysis (UVFAP) of different etiology, who underwent medialization thyroplasty, using Netterville's technique. Method: In patients eligible for medialization thyroplasty, maximum phonatory time was measured, quality of life (VRQoL) and functionality (VHI-30) questionnaires were applied before surgery and posteriorly at 3 and 6 months after surgery. Means comparison tests were used to analyze the results. Results: Medialization thyroplasty was carried out in 27 patients presenting with UVFAP from 2013 to 2019. All had a statistically significant and clinically significant improvement. This was measure with maximum phonatory time (medium of 4.07 to 11.07 seconds), and VRQoL (medium of 33 to 15 points). No mayor complications were documented. Conclusions: Medialization thyroplasty is a safe procedure that significantly improves functionality and quality of life in patients with UVFAP.