Chicco PhysioForma
The PhysioForma is a popular orthodontic option because its nipple is slightly curved/flattened to allow for better tongue alignment against the palate. It also includes little ridges and a form that aids in the placing of the tongue. Chicco PhysioForma is composed of silicone and is all one piece for convenience and safety. Bonus: A panel of neonatologists, pediatricians, and orthodontists collaborated to create this pacifier.
Considerations: According to reviewers, the ring of this pacifier is rather big and can be uncomfortable for babies, especially during sleep. Others claim that the shape isn't popular with breastfed babies. Another frequent issue is that the fabric gathers lint and fuzz.
Link: https://www.amazon.com/Chicco-NaturalFit-Pacifier-Blue-Silicone/dp/B00KCNIRXM