Q: My client has no incisors and an underbite, and she distorts both S and Z. These errors sound like a lateral lisp, however when I use your straw testing method, there is no airflow coming out the sides, only the front. My colleague tells me that this is a lateral lisp. But how can it be if the air doesn’t come out the sides? Your colleague is wrong: If the airstream is not coming out the sides (as tested…
Lateral Lisp, Missing Teeth, and Malocclusion
By Pam Marshalla