These expert-approved pacis help newborns and older babies comfort themselves. Medically reviewed by Lyndsey Garbi, MD Fact checked by Rich Scherr Medically reviewed by Lyndsey Garbi, MD Fact ...

There are two types of pacifiers: conventional and orthodontic. Orthodontic pacifiers are generally flat bottomed and square, which is designed to imitate the shape of the mother’s nipple.