What You Need To Know About Crossbites
03 May 2018
Typically, when a parent brings a young child to the dentist, the last discussion they’re expecting
to have is one centered on braces and orthodontic appliances. Yet, even at ages three and four,
a talk about braces, sagittal expanders, and retainers can indeed be front and center when a
child is diagnosed with a crossbite. The question then is what to do about it, how soon should
intervention take place, and what the complications are that can arise if nothing is done at all.
Let’s get some answers.
What Exactly Is a Crossbite?
Imagine for a moment you’re sitting in front of a nice soup bowl with a wide flat brim, and inside
that bowl is hearty chowder you’d like to keep warm until you’re ready to devour it. So, you grab
another bowl designed exactly like the first, and hover it upside-down over the bowl containing
the soup. As you slowly lower it, you try to line up the brims so when they rest together they
form a nice even seal. Unfortunately, given the soup is hot, you don’t quite get the brims to line
up perfectly, and the edge of the top bowl ends up resting just slightly to the left of the lip on
the bottom bowl. The way these two bowls now rest unevenly atop one another is exactly what
you would see in a person with a crossbite. A crossbite can affect several teeth, or a single tooth,
and can occur on either one side of the mouth or both. Simply put, if any one tooth (or several
teeth) lies nearer the tongue or cheek instead of coming together evenly, you’re likely dealing with a crossbite. [Because minor crossbites are often seen as not worth treating by some, here
is a great spot to talk what you see in untreated cases]
So, What To Do About It And When?
The dental community is split on when to initiate treatment for a crossbite, with some suggest-
ing treatment should begin as soon as it is noticed (sometimes as early as age three), while
others suggest parents should wait until a child’s sixth year molars have arrived. [Here you have
the perfect opportunity to talk about your own opinion of crossbite treatment!] Despite the
difference of opinion as to when treatment should begin, dentists and orthodontist are in
agreement that the condition cannot be left untreated. Doing so presents a host of complica-
tions for the child later in life including gum and tooth wear, uneven jaw development that can
lead to temporomandibular joint disorder (TMJ), and facial asymmetry – something no parent
or child wants.
What Does Crossbite Treatment Look Like?
Crossbite treatment generally involves adjusting the spread of a child’s teeth with dental
appliances so the bite pattern matches evenly on all sides. Depending on the type of crossbite
a child has, this can be done with dental expanders that resemble orthodontic retainers, and
include a screw that is tightened nightly to “spread” a child’s bite to the prescribed width.
Additionally, dental facemasks, braces and clear aligners may be used – particularly when a
single tooth is out of alignment.
Crossbites are generally regarded as genetic in nature, and they’re not overly common. It is,
however, a condition that needs to be treated before permanent damage to a child’s facial and
oral development occurs. So, if you find yourself at the other end of a discussion about having
your little one wear a dental expander, be sure you listen and get however many opinions
regarding that advice as you require. Your child, and your wallet, will thank you long into the