Siersma Orthodontics offer adult braces, clear braces, invisible braces, underbite, straighten teeth & braces for teeth. One reason Dr. Siersma is so popular is that he’s great with kids and teens. Dr. Siersma will treat your child with care, compassion and respect. Dr. Siersma’s dental braces straighten teeth with conditions such as Overbite, Underbite, Crooked teeth and Buck teeth.