Implant Crowns

  1. Occlusal table: buccolingual width 80% of normal crown (Fig.2)
  2. Slopes: not so steep (shallow).  Lateral movement may damage the implant stability
  3. Do not use too much spacer.  Implant/abutment is rounded.  Otherwise retention will be poor
  4. Retention groove: better not to block with die spacer.  Make retention slot as distinct as possible.  Extend all the way to the margin
  5. Do not over extend the margin.  Implant never gets caries.  Over-extension is not good for the gingiva
  6. If bite is not stable or not right, return with metal framework (casts).  We will get bite registration.  The models will be re-mounted
  7. Pour every one of impressions and trim every die.  Sometime it is difficult to make good impression for every single prep, every corner.  Use all of the trimmed dies to make relatively good margin
  8. If impression is too bad, call doctor's office.  Impression will be retaken without any question
  9. Check occlusion, centric and lateral and protrusive, in the lab, before sending out the case
  10. Occlusal contact should be light for the implant crown
  11. Make a small hole in the occlusal surface (if requested) so that excess cement can escape
  12. PFM crown should have enough metal support (framework).  Otherwise porcelain will chip easily
  13. If occlusal clearance is not enough, make metal occlusal surface


Xin Wei, DDS, PhD, MS 1st edition 11/06/2013, last revision 12/25/2013