Image source: specialschool.org.uk
A dentalized lisp is similar to a frontal or interdental lisp. With a frontal lisp, the child protrudes the tongue through the front teeth when pronouncing the “s” and “z” sounds. Children with a dentalized lisp push the tongue up against the front teeth, rather than through the front teeth. A dentalized lisp may arise during typical speech development. Some children with a dentalized lisp “grow out of it” by the time they are about four years old. However, it’s always best to bring your child to a speech-language pathologist (SLP), even if you think he might grow out of his articulation difficulty.