← All NEET MDS Topics

Space Maintainers & Space Analysis

Pedodontics & Preventive Dentistry • NEET MDS Study Guide • AI-Generated Notes

⭐ High-Yield Facts for Exam

  • Band & loop = unilateral posterior loss.
  • Lingual arch = bilateral mandibular.
  • Nance/TPA = bilateral maxillary.
  • Distal shoe = 2nd primary molar lost early.
  • Leeway ≈ 1.7 mm/side mandible.

Space Maintainers

  • Band & loop — for a single (unilateral) posterior primary tooth loss.
  • Lingual arch — bilateral mandibular space maintenance (needs permanent incisors erupted).
  • Nance appliance / TPA — bilateral maxillary maintenance.
  • Distal shoe — guides eruption of the first permanent molar when the second primary molar is lost before the 6-year molar erupts.

Leeway Space (Nance)

The combined mesiodistal width of primary canine + molars exceeds that of their permanent successors. Leeway space ≈ 1.7 mm per side in the mandible (~0.9 mm maxilla), useful for late crowding resolution.

Exam Tips ⭐

Band & loop = unilateral posterior; distal shoe = 2nd primary molar lost early; leeway ≈ 1.7 mm/side mandible.

📝 Practice MCQs — Space Maintainers & Space Analysis

Q1. The space maintainer for early loss of a single primary molar is the:
A. Lingual arch
B. Band and loop
C. Nance
D. Distal shoe
Show Answer
✅ Answer: B
Band & loop maintains space for a single posterior tooth.
Q2. A distal shoe is indicated when the:
A. First permanent molar is lost
B. Second primary molar is lost before 6-year molar erupts
C. Incisor is lost
D. Canine is lost
Show Answer
✅ Answer: B
It guides the unerupted first permanent molar after early E loss.
Q3. Mandibular leeway space is approximately:
A. 0.5 mm/side
B. 1.7 mm/side
C. 3 mm/side
D. 5 mm/side
Show Answer
✅ Answer: B
Nance leeway space ≈ 1.7 mm per side in the mandible.
📧 Get Free NEET MDS MCQs in Your Inbox
50 high-yield MCQs + mnemonics + AI study tips — completely free
No spam. Unsubscribe anytime.

Related Topics

Pulp Therapy in Primary TeethEruption Chronology & AnomaliesAnchorage — Types & Management