Scenario T-Loop Position Resulting Effect
Standard retraction with equal control Centered Balanced α and β moments; negligible vertical force
Need to anchor molars (prevent mesial drift) Posterior ↑ Beta moment, molars stabilize; anteriors retract + intrude
Need strong anterior retraction with minimal molar effect Anterior ↑ Alpha moment, anteriors retract efficiently, but risk of extrusion
Patient with deep bite Posterior Helps intrude anteriors
Open bite or no vertical concern Anterior or Centered Use depending on anchorage needs

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