Prosthodontics & Occlusion · single question
For a mandibular two-implant overdenture, what is the IDEAL location for implant placement?
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Correct answer: A. Canine-premolar region (B/C position, approximately tooth position 22–27)
- A. Correct. The canine-to-premolar region (approximately the position of teeth #22 and #27) is the ideal location for a 2-implant mandibular overdenture. This position: (1) is anterior to the mental foramen (safe zone), (2) provides biomechanically favorable support, (3) avoids the genial tubercle (midline), and (4) provides good retention and stability.
- B. Posterior molar region implants for an overdenture require more implants (typically 4) and better bone — 2 implants in the molar region do not adequately support the entire arch.
- C. Placement at the mental foramen risks nerve damage.
- D. Symphysis/midline placement risks proximity to genial tubercles and limits the inter-implant distance, reducing stability.
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