From: Speech-aid prosthesis in velopharyngeal incompetency patient with cleft palate: can speech aids be applicable for adult patient?
Pre-Op
Post-Op
Perfect articulation rate
59.1%
(13/25)
68.2%
(15/25)
Error patterns
Distortion
75.0%
62.5%
Substitution
25.0%
37.5%