Would Cutting Enamel To Remove Black Triangle Weaken my Teeth?

While in your "minds eye" any removal of enamel is destructive, most interproximal contouring is extremely small and insignificant.  We sometimes add fluoride to help the polished area, but that may be overkill for most situations.  Another option is Bioclear Method.  This is augmentive, and adds material where the space is, and extends onto the tooth for strength and esthetics.

Black triangles can happen for a few reasons,1) triangular-shaped teeth, 2) loss of gum tissue between teeth due to gum disease, 3) roots of teeth tilted away from each other.

If the teeth are shaped like triangles, a very slight narrowing of the enamel near the ends, and then continued orthodontic treatment to fully close space between the teeth would work well.  

If there is a loss of gum tissue, it would first be important to try to find the reason for this and correct it, otherwise even after "fixing" the black triangle it could reappear. Gum tissue can be lost by too-vigorous cleaning especially with electric toothbrushes and flossers, or by bite problems especially if the front teeth touch the bottom teeth too hard when you close your teeth together.

If the roots of the teeth are tipped away, your orthodontist can try to get them more parallel, but sometimes this isn't possible due to your specific bite.

Good luck!

Your orthodontist has given you very solid advice about the reduction of black triangles.  A small amount reduction of enamal at the contact areas between teeth and the closure of the space created will have the effect of the reduction or elimination of the black triangle.  Don't worry.  The reduction of the enamel will not pose any  increased risk of decay.  A safe reduction would be no more than 1/4 the thickness of the enamel.

 

Excellent question. It is actually one we dentists/orthodontists all asked ourselves. For years we have preached "protect enamel." We warn of wearing down teeth too much. Many bad things can occur if enamel isn't worn down properly; sensitivity, decay, crowns, root canals, etc.

There are a few truths to know that will put your mind at ease, when addressing a black triangle.

1) processed foods in our diet

2) cavemen

3) weak enamel

4) fluoride

Over the past century we have has a huge increase of process foods. The typical caveman diet (now in vogue again) was mainly of nuts berries and carcases. If you even have the opportunity to look at a caveman skull, notice their teeth. You will see not only are there more teeth than we have now, you'll see that they are very square and perfectly aligned.

The reason is our teeth we built to last with a caveman diet and be wore them down "interproximally". On average we actually have several mm of enamel surrounding the tooth, before any real harm is done. As orthodontists and dentists we can take advantage of this to achieve a much more cosmetic, often more hygienic and more stable result by preforming mild interproximal reduction (IPR). {Results are more cosmetic bc the black triangle are less noticeable or gone all together. Hygiene can improve bc food gets caught in the black triangles less and less surface area for plaque to accumulate. Stability is your long term orthodontic result is much more stable when their is a solid broad contact compared to a previous pin point contact.)

Some studies have actually stated that by doing IPR you are likely removing weakened (acid attacked) enamel and allowing for a more fortified enamel wall to protect the tooth. To insure that this is the case continue using a fluoride toothpaste. Anything with the ADA approve logo on it is acceptable, floss floss floss (they even have fluoride fortified floss) and a fluoride risen is never over kill.

Keep in mind black triangle will worsen over time because of osteoporosis so taking calcium is always a good thing too.

Word of advise: make sure you can visualize the tooth not looking too skinny prior to doing so, triangular teeth tend to be the best for IPR. Bonding can be another viable option for a black triangle if you'd like to add to the tooth and not take away from it.

Assuming that you do not too much bone loss (ie periodontal disease), and that your teeth are not too fan shaped, an acceptable amount of enamel reduction between teeth to reshape their contact and make them broader (and then closing the remaining space) can dramatically change the appearance of a black triangle for patients orthodontically