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Anchorage — Types & Management

Orthodontics • NEET MDS Study Guide • AI-Generated Notes

⭐ High-Yield Facts for Exam

  • Nance = maxillary anchorage.
  • Lingual arch = mandibular.
  • TADs = absolute (skeletal) anchorage.
  • Headgear = extra-oral anchorage.
  • Anchorage = critical/moderate/minimum.

Anchorage

Anchorage is resistance to unwanted tooth movement (Newton's third law reaction). Managing it prevents anchor teeth drifting into space meant for correction.

Intra-oral Anchorage Aids

  • Nance holding arch — maxillary; acrylic button on the palate resists mesial molar movement.
  • Lingual arch — mandibular; maintains molar position/arch length.
  • Transpalatal arch (TPA) — connects maxillary molars for added anchorage.

Absolute & Extra-oral Anchorage

  • TADs (mini-implants/temporary anchorage devices) — provide absolute skeletal anchorage, no patient compliance needed.
  • Headgear — extra-oral anchorage/force to restrain maxillary growth or distalise molars.

Classification

Critical (maximum), moderate, and minimum anchorage based on how much of the available space is needed for the corrective movement.

Exam Tips ⭐

Nance = maxillary; lingual arch = mandibular; TADs = absolute anchorage; headgear = extra-oral.

📝 Practice MCQs — Anchorage — Types & Management

Q1. The Nance holding arch is used in the:
A. Mandible
B. Maxilla
C. Both arches
D. TMJ
Show Answer
✅ Answer: B
The Nance appliance is a maxillary anchorage aid with a palatal button.
Q2. Which provides ABSOLUTE anchorage with no compliance?
A. Headgear
B. TADs (mini-implants)
C. Class II elastics
D. Lingual arch
Show Answer
✅ Answer: B
TADs offer skeletal absolute anchorage independent of compliance.
Q3. Headgear is an example of:
A. Intra-oral anchorage
B. Extra-oral anchorage
C. Reciprocal anchorage
D. Stationary anchorage
Show Answer
✅ Answer: B
Headgear provides extra-oral anchorage/force.
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