Incisal gap
Space between the tray and tooth edge can indicate that the tooth has not reached the planned stage.
04 · Live it · Kamloops
When Invisalign is not tracking
Tracking means the teeth are fitting the positions built into the current aligner. A visible gap, rocking tray or attachment that no longer engages can show that actual movement is behind the digital sequence.
The plain answer
Poor tracking is a signal to review, not a reason to push ahead faster.
Causes can include inadequate wear, incomplete seating, lost or chipped attachments, difficult movements, inaccurate bite capture, tray distortion or biological response. The remedy may involve more wear, seating aids, attachment replacement, a new scan, revised staging or another appliance.
Check the fit under good light, compare both sides and note when the gap first appeared. Contact the treating office before the scheduled change if the tray does not seat or movement seems stalled.
What matters
Three things to evaluate before acting
Attachment engagement
A tray should fit around attachments as designed; a missing attachment can reduce control for the planned movement.
Plan revision
A refinement or new scan is not automatically failure. It can be the appropriate response to real biological feedback.
04
Where this fits
Make treatment work in ordinary daily life.
The Live it stage is where outcomes are protected by routine. Aligners must be worn as directed, removed safely, cleaned sensibly and kept away from heat. Tracking problems, lost trays or unexpected discomfort should be reported rather than hidden until the next scheduled visit.
Advancing through poorly fitting trays compounds the mismatch. Chewies can help seat an aligner when prescribed but cannot make an impossible movement occur or replace clinical review.
Questions people ask
Useful answers before a consultation
How much gap is acceptable?
Minor differences can occur, but there is no safe universal measurement for self-diagnosis. Send photos or attend an assessment as directed.
Should I wear the tray longer?
The office may prescribe additional wear, but the cause should be considered before simply extending every stage.
Do chewies fix tracking?
They can help seat a tray, but they do not replace attachments, wear, revised planning or professional evaluation.
References
Sources for this topic
External sources can change. Verify current regulatory, professional, manufacturer and local information at the linked publisher; these sources do not replace an individualized examination.
Presented by Blue Bird Dental, Hillside Dental and River City Dental. Last reviewed September 5, 2026. This content is educational and is not a substitute for an individualized examination, diagnosis or treatment recommendation. For pain, swelling, trauma, breathing difficulty, uncontrolled bleeding, infection or an appliance causing injury, contact a local dentist, treating provider or emergency service directly.