"Why do I have these little dark gaps between my teeth now that my Invisalign is done?"
It's one of the more common questions patients ask after finishing orthodontic treatment. Here's what's actually happening, why it's more common than people expect, and what can be done about it.
So What Exactly Is A Black Triangle?
A black triangle is the small, triangular gap that appears between two teeth near the gumline, usually visible because the gum tissue that used to fill that space has receded or never fully filled in. It's not a hole in your tooth, and it's not decay.
Why Does This Show Up Specifically After Invisalign?
The teeth didn't cause the gap. The movement did. As Invisalign moves crowded teeth into better alignment, gum tissue doesn't always expand at the same rate, which creates the visible triangle.
Does This Mean My Invisalign Treatment Went Wrong?
No. Black triangles aren't typically a sign of a treatment mistake. They're a known, fairly common side effect of straightening crowded teeth.
Is Everyone Who Gets Invisalign At Risk Of This?
Not everyone develops them, but patients with more significant crowding, thinner gum tissue, or some early gum recession tend to notice this more often.
Can Black Triangles Be Prevented Before They Happen?
In some cases, yes, though prevention isn't always fully possible since available gum tissue is hard to predict in advance.
What If I Already Have Them Now? What Are My Options?
Composite Bonding
A tooth-colored resin added to reshape the area, closing the visible gap.
Reviewing Your Interdental Brushing Technique
Minor changes can reduce irritation that makes the gap look more pronounced.
Orthodontic Refinement
Small further adjustments to tooth position in certain cases.
Gum-Focused Treatment
For more significant cases, depending on what's contributing to the gap.
Which Option Is Right For Me?
That depends on size, location, and cause. This isn't something to self-diagnose from a mirror.
Is This Something I Should Bring Up At My Next Appointment?
Yes. Addressing it sooner often means simpler treatment options stay on the table.
FAQs
Are black triangles permanent?
Not necessarily, depending on the cause and size of the gap.
Will black triangles get worse over time if I don't treat them?
They can become more noticeable, especially if gum recession continues.
Does this happen with braces too, or just Invisalign?
This can happen with any orthodontic treatment that moves crowded teeth into better alignment.
Can poor oral hygiene cause black triangles?
Hygiene isn't usually the root cause, but it can affect how the area looks over time.
Is composite bonding a permanent fix for black triangles?
It can last several years with proper care, though it may need touch-ups over time.
