Implants · single question
For a cement-retained implant crown, what is the minimum interocclusal space needed?
Show answer and explanation
Correct answer: D. 7mm
- A. 2mm is insufficient to accommodate an abutment and cement-retained crown.
- B. 5mm is cited for SCREW-RETAINED implant crowns — 7mm is the minimum for cement-retained crowns.
- C. 10mm is more than the minimum needed and would represent excess space.
- D. For a CEMENT-RETAINED implant crown over an abutment, a minimum of 7mm of interocclusal space (from implant platform to opposing occlusion) is typically required. This accommodates: abutment height (3-4mm) + crown thickness/metal + cement space. ⚠️ Note: 5mm is cited for SCREW-RETAINED; 7mm for CEMENT-RETAINED.