Crowding happens when the jaw simply doesn't have enough space for every tooth to sit flat and straight. Instead, teeth rotate, overlap, or get pushed out of the arch entirely. It ranges from mild — a couple of teeth slightly out of line — to severe, where teeth are visibly stacked on top of one another. Dr. Kim sees crowding at every level of severity, and treats it with the same care either way.
What causes crowded teeth?
In most cases, crowding comes down to a simple mismatch: the teeth are larger than the jaw has room for. That mismatch is often genetic — you can inherit your mother's jaw size and your father's tooth size, and the two don't always agree. But several other factors contribute as well.
Why it's worth addressing
Crowded teeth are harder to clean — floss and even a toothbrush can't always reach between overlapped surfaces, which raises the risk of decay and gum inflammation over time. Crowding can also cause uneven wear as teeth contact each other in ways they weren't designed to, and it's simply one of the more visible things people notice about a smile. Dr. Kim treats it as both — a health issue and a confidence one — because a smile that's easier to keep healthy and a smile you feel good showing shouldn't be separate goals.
The good news: crowding responds predictably to orthodontic treatment, whether that means creating space through expansion, careful movement with aligners or braces, or — in more severe cases — a small amount of strategic tooth reduction or extraction.
Treatment options
Clear Aligners
Effective for mild to moderate crowding, gradually creating space and guiding teeth into alignment with a series of custom, removable trays.
About clear aligners →Traditional or Clear Braces
The most precise option for more significant crowding, giving Dr. Kim full control over how each tooth moves into its final position.
About braces →Early Orthodontics
For children, expanding the palate while the jaw is still growing can create space for incoming permanent teeth — sometimes avoiding the need for extractions later.
About early treatment →Common questions about crowded teeth
Does crowding get worse over time if I don't treat it?
It can. Teeth naturally shift throughout life, and crowding tends to progress gradually rather than staying static. Addressing it sooner often means a simpler, shorter treatment than waiting.
Will I need teeth removed to fix crowding?
Not always. Many cases are resolved through expansion or careful spacing of existing teeth. Extractions are reserved for more severe crowding where there genuinely isn't enough room to align teeth otherwise — and we'll always explain why before recommending it.
Is crowding just a cosmetic issue?
No. While appearance is often what brings patients in, crowded teeth are also harder to clean and more prone to decay and gum irritation, which makes this a functional and health concern as much as an aesthetic one.
At what age should crowding be evaluated?
The American Association of Orthodontists recommends a first evaluation by age 7, when emerging crowding is often easiest to identify and, in some cases, easiest to manage. That said, crowding can be treated successfully at any age.
Curious what's actually causing your crowding?
A consultation gives you a clear picture — what's happening, why, and what your options are — and you'll be seen right at your appointment time, with no pressure and no obligation.
Book a Smile Consultation