Crowded teeth happen when the jaw does not have enough room for the teeth to sit in a neat row, so they overlap or twist. Treatment first creates space, by widening the arch, gently reshaping the sides of some teeth or sometimes removing teeth, then aligns them with braces or clear aligners.
What causes crowding
Most crowding is a mismatch between tooth size and jaw size, and it often runs in families. Baby teeth lost early can let neighbouring teeth drift into the space meant for an adult tooth, while baby teeth that stay too long can push adult teeth off course. Crowding also creeps in with age: the lower front teeth tend to crowd slowly through adult life, which is why many adults notice it for the first time years after school, and why teeth straightened in the teens can move once retainers are left off.
Why it matters
Mild crowding is mostly about appearance, and how you feel about your smile is a fair reason to look at treatment. Heavier crowding has practical effects too. Overlapping teeth are harder to brush and floss, so plaque collects where the brush cannot reach, and a tooth pushed outside the bone can lose gum over its root. Twisted teeth can also catch and wear against each other, and straight teeth are simpler to restore if you ever need a crown or veneer.
How we assess it
Your orthodontic consultation is complimentary, with no referral needed. Dr Anand Srinivasa, our principal clinician, whose practice is restricted to orthodontics, takes records (photos, digital scans and X-rays where needed) and measures how much space is missing, in millimetres. That figure, together with your gums, bite and lip profile, decides where the room should come from, and he then plans the movements digitally. Your written plan sets out the options, how long each commonly takes and the full cost.
Where the room comes from
- Expansion: in children, a palate expander can widen a narrow upper jaw while it is still growing. In teens and adults, braces or aligners can widen the arch a little, within what the gum and bone will safely support.
- Interproximal reduction (IPR): polishing a fraction of a millimetre of enamel from the sides of selected teeth. Done within careful limits, it makes space without removing teeth, and it is a routine part of many aligner and braces plans.
- Extractions: removing teeth is less common than it once was, but it still has a place. When crowding is severe, or the front teeth already sit well forward, making room any other way can push teeth outside the bone and the lips forward. Then removing two or four premolars can give the steadier, healthier result. If we recommend it, we show you why on your own records, and the alternatives and their trade-offs are in your written plan.
Braces or aligners
Both treat crowding well. Invisalign® suits many mild to moderate cases and is removable, but it needs wearing 20 to 22 hours a day. Damon™ braces, including clear brackets, and lingual braces are often more predictable for severe crowding, heavily twisted teeth and extraction cases. Mild crowding commonly takes 6 to 12 months to correct, and fuller treatment commonly 12 to 24 months. Our braces vs Invisalign guide compares them. Children start with early orthodontics, and adults can read about adult orthodontics.
Keeping it straight
Crowded and twisted teeth are among the quickest to drift back. Most patients have a fixed wire behind the front teeth, a clear night-time retainer, or both, worn long term. See our retainer guide.
What it costs
A short aligner course for mild crowding costs less than comprehensive treatment. As a guide, comprehensive treatment in Sydney is commonly quoted at roughly $4,500 to $8,000 for metal braces and $6,000 to $9,000 for Invisalign. You get a written quote after an examination, with payment plans across treatment. The Sydney braces cost guide explains what moves the price.