Dr. Browns orthodontic pacifiers feature a silicone nipple, a flexible and durable material that withstands extreme temperatures. Helps reduce sucking and pressure on the palate. As baby sucks, the round structure of the pacifier expands to reduce pressure and make baby feel comfortable. Babys mouth is not irritated, thanks to the thin stem design. Dentists and speech therapists often recommend the use of orthodontic nipples. In their opinion, orthodontic nipples create more space in the babys mouth, allowing for more tongue movement, and also support the natural development of the jaw and palate due to the excellently shaped nipple. In addition, orthodontic pacifiers help prevent future dental problems by minimizing pressure on the teeth for proper development.