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Implants · single question

For implant-supported restorations, what is the MOST important factor to communicate to the dental laboratory for long-term success?

  1. The shade and color of the restoration
  2. Directing forces along the long axis of the implant
  3. The material of the crown (zirconia vs. PFM)
  4. The type of abutment connection
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Correct answer: B. Directing forces along the long axis of the implant

Most critical biomechanical principle: directing occlusal forces along the LONG AXIS of the implant. Implants lack PDL and cannot absorb lateral forces. Off-axis forces cause stress at the bone-implant interface → bone loss → implant failure.
  • A. Shade is esthetic — not primary factor for long-term success.
  • B. CORRECT. Long-axis force direction = most important factor for implant success. Axial loading distributes force optimally through bone.
  • C. Crown material affects esthetics/strength — not the primary biomechanical concern.
  • D. Abutment connection is important but secondary to force direction.

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