cohort
The Effect of Attachments on Aligner Tracking: A Prospective Study
Rossini G, Parrini S, Castroflorio T · Angle Orthodontist (2019)
A prospective clinical study evaluating how attachment presence influences aligner tracking accuracy across 30 patients over 12 months.
Key findings
- Rotational movements >15° tracked significantly better with attachments (p<0.01).
- Extrusion movements achieved a mean accuracy of 55% with attachments vs 32% without.
- Attachments did not improve intrusion accuracy.
Clinical relevance: Reinforces the clinical convention of placing attachments for rotations and extrusions but suggests they are less useful for pure intrusive mechanics.
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