Clear aligners move teeth by pushing on them — but a healthy tooth is smooth and round, and a plastic tray has very little to grip. Attachments are how we solve that. Place them well and the case tracks; place them poorly and it stalls. This guide covers what attachments are, why they matter, and a step-by-step protocol for a clean bond.
What is an attachment?
An attachment is a small, tooth-coloured shape, built from composite and bonded to the tooth. On the round, smooth surface of a tooth, the tray alone has little to hold. The attachment gives it purchase — a defined face to push against — so the aligner can rotate, extrude, or torque a tooth it otherwise could not. They’re nearly invisible, and at the end of treatment they’re simply polished away.
Set your tray before you begin
This is a dry-field procedure — you don’t want to break isolation hunting for an instrument. Have ready:
- Cheek retractors — to isolate and see
- The attachment template (supplied in the patient’s kit)
- Composite and an applicator
- Bonding agent
- Acid etch
- Polishing cups for the finish
Read the summary report first
Every case ships with a summary report, and each attachment is marked on the tooth chart — which tooth, and the step range it stays on (for example, an upper incisor from step 1 to 7, or a lower from 1 to 21). Read it before you bond: it tells you exactly where the template lays composite, and which teeth stay bare.
The bond — timings matter
A clean, dry, well-cured surface is the whole game. Work through it in order:
First — retractor in, teeth clean and air-dried · template snaps in · aligner 1 fits
- 20s Etch enamel only where the attachment sits
- 15s Rinse then dry thoroughly
- 10s Bonding agent apply to etched surface
- 5s Air-dry gentle stream
- 10s Light-cure seal the surface
- Isolate and dry — retractor in, teeth clean and air-dried. Confirm the template snaps in and the first aligner fits.
- Etch — acid etch on the enamel, only where the attachment sits, for 20 seconds.
- Rinse for 15 seconds, then dry thoroughly.
- Bonding agent — apply to the etched surface, let it sit 10 seconds, air-dry gently for 5 seconds, then light-cure for 10 seconds.
Place the composite
- Load the template — fill each window with composite, slightly overfilled and shade-matched to the tooth.
- Seat the loaded template fully onto the teeth.
- Adapt — with a spatula, press gently around each attachment, squeezing excess away from the etched area.
- Cure — hold firmly and light-cure to the manufacturer’s time.
- Clean — peel the template off and remove every trace of flash and stray resin, around the attachments and between the teeth.
Finish and check
Repeat for any remaining attachments, then do the final check: seat the first aligner, confirm it fits accurately over the new attachments, and show the patient how to insert it — and how to remove it, lifting from the back teeth first. And one rule: keep the template. Store it. Never hand it to the patient.
A clean bond vs. a debond
A few things make the difference:
- Keep the field bone-dry and free of contamination.
- Don’t overfill — excess flash ruins the tray fit; inspect for voids and bubbles afterward.
- If the template carries many attachments, section it near the midline so it seats without shifting.
- Don’t disturb it while it’s on the teeth.
- Use a good, packable composite — cheap material loses its shape and debonds.
Key takeaways
Read the report, isolate, etch 20, rinse 15, bond and cure, then trim clean and test the fit. Attachments are where the plan meets the tooth — get them right, and everything downstream works.
Shafaf partners with trained dentists across Iraq and the region. Find a Shafaf provider or talk to us about partnering.