How will tooth decay and cavities affect my Invisalign treatment?

Doctor's Answers 1

Photo of Dr Poon Kee Hwang
Dr Poon Kee Hwang

Dentist, Orthodontist

Hi there and thank you for your question.

Invisalign is an orthodontic appliance that works by contacting the surfaces of your teeth to nudge them to the next position. Invisalign is customised and designed to be as close-fitting as possible to your tooth surface to effect tooth movement and have a better grip to stay in the mouth. Cavities restored with fillings that follow the original shape of the teeth pose NO PROBLEMS to Invisalign treatment.

  • New fillings that are TOO SMALL, will reduce the tooth surface area that Invisalign can grab and affect tooth movement and retention of the appliance.
  • New fillings that are TOO BIG, will result in Invisalign aligners being unable to seat all the way down. This means that aligners can't grab onto teeth and is a serious problem.
  • New fillings that ENCROACH onto areas with Invisalign's tooth-coloured attachments (which are meant to direct and control tooth movement) may result in a redo of these attachments. The surface of the new fillings may need to be prepped differently to allow attachments to be placed. New ceramic crowns are particularly at risk of this problem due to the glazing layer of porcelain crowns.

If you are prone to tooth decay, your Orthodontist/ Dentist may prescribe Tooth- Remineralization medication (such as Tooth mousse) that can be applied in your aligners to wear overnight. Extra care is needed to clean the aligners in the morning.

Hope this clarifies your doubts!

Cheers and #StartSmiling,

Dr Poon Kee Hwang

Consultant Orthodontist

Similar Questions

Is Invisalign or braces more effective for cross-bite issues?

Uprighting your upper 2nd premolars can be achieved with Invisalign or fixed (traditional) braces. If your tooth is very short on the palatal (side facing inward), then it may be more efficient to upright the tooth using fixed braces since the Invisalign aligner will have a smaller surface area to grip on to with a short tooth. Anterior crossbites (that occur in the front teeth) can be solved with Invisalign or fixed braces. The bigger question is the reason for the crossbite being present in the first place. I have covered this here.

Photo of Dr Jaclyn Toh

Answered By

Dr Jaclyn Toh


How to fix black triangles after Invisalign treatment?

Thank you for your questions. Black triangles often appears after alignment in areas where there were previous overlapping of teeth, especially in adult patients. These black triangles can be minimized by doing some reshaping between teeth or what is commonly known as IPR (interproximal reduction) so that teeth can come closer together and minimize the black triangles. However, if the black triangles are very broad, they may not be eliminated totally through IPR as we can only remove 0. 25mm of enamel per tooth surface so that not to cause damage or sensitivity to the tooth itself.

Photo of Dr Enrica Sham

Answered By

Dr Enrica Sham


Ask any health question for free

I’m not so sure about a procedure...

Ask Icon Ask a Question

Join Human

Sign up now for a free Human account to get answers from specialists in Singapore.

Sign Up

Get The Pill

Be healthier with our Bite-sized health news straight in your inbox