Figure 2:

Prevalence of Speech Distortion in DFD Patients with AOB and Class I Controls. A speech-language pathologist (SLP) performed a perceptual evaluation and scored patients for visual and auditory distortions. Percentages of participants exhibiting distortions are represented in the bar graphs. A. Prevalence of visual dental distortion. A dental distortion occurs when the tongue is visibly positioned too anteriorly during sound production. B. Prevalence of visual interdental distortion. An interdental distortion occurs when the tongue visibly protrudes between the front teeth during speech.²⁶ C. Prevalence of auditory distortion (any type). An auditory distortion is when a sound is distorted or changed. Types of auditory distortions include whistled, backed, and lateralized. Blue: Control patients. Orange: DFD patients with Class III malocclusions.