By Dr. Shaun Weng
Published June 2026
10 min read
Clinical Summary
Add paragraph text. Click “Edit Text” to update the font, size and more. To change and reuse text themes, go to Site Styles.
Content
Upper Molar Distalisation is an effective treatment modality in
Class II correction cases.
Based on the current literature how many mm can be predictably achieved in each case?
RCT study done by Garino et al. had a sample size of 30 non-growing patients.
Placed into two experimental groups
Group A: 5 Vertical attachments (7/6/5/4/3)
Group B: 3 Vertical attachments (6/5/4)
All patients were instructed to:
•Wear their aligners for 22+ hours/day
•4.5oz 3/16” Class II Elastics (full time)
•Changing aligners trays every 2 weeks
•V-shaped staging pattern
Upper Molar Distalisation had achieved:
~2-2.5mm Distalisation
~1mm Intrusion
What about Group A and Group B differences?
Group A showed no significant tipping movement but more intrusion (p<.001)
Group B showed unfortunately significant tipping of the first molar (p<.05)
Conclusion
Garino et al. concluded the 5 Attachment pattern (group A) appears to be more effective in molar Distalisation, decreasing amount of tipping, molar extrusion, anterior anchorage loss & undesirable changes in LFH.
Achievable Distalisation was around ~1.5-2.3mm
About 2mm of Upper Molar Distalisation is achievable
accompanied by slight molar crown distal tipping
Achievable Upper Molar Distalisation of 2.25mm
without significant tipping
PROTOCOL INFORMATION
DIFFICULTY
Input text here
BIOMECHANICS
Input text here
Continue Reading
BIOMECHANICS
Premolar extraction protocols Part 2 What you may not know…
BIOMECHANICS
Premolar extraction protocols Part 1 What you may not know…
BIOMECHANICS
IPR accuracy exposed! What this study reveals may surprise you
BIOMECHANICS
Does Trimline matter in Aligners?
