Bicon Dental Implants
Friday, November 21st 2008 3:08PM EDT
All-Ceramic Crowns: Restoration of Two Mandibular Implants
This case demonstrates how predictably aesthetic restorations are easily achieved with the use of a shoulder depth gauge for determining which abutment height will provide an ideal subgingival margin. And how aluminum oxide sleeves facilitate the fabrication of affordable all-ceramic crowns.
     


1. Occlusal view after the removal of temporary abutments, showing the sulcus and 3.0mm well of two Bicon implants.


2. The first line of the seated abutment shoulder depth gauge indicates the shoulder position of the 5.0mm x 2.0mm shouldered abutment. The second line indicates the shoulder position of the 5.0mm x 4.0mm shouldered abutment.


3. Two seated 5.0mm x 2.0mm Stealth Shouldered Abutments™. By convention an abutment flat is placed buccally.


4. The tall and short 5.0mm one-piece plastic sleeves are snapped onto the 5.0mm shouldered abutments. Their flat sides are designed to correctly orientate them with corresponding flats on the abutment.


5. The tall and short one-piece plastic sleeves are being used as an impression coping for transferring the relative position of the abutments to a stone model.


6. The one-piece plastic sleeves withdrawn in the impression material prior to the insertion of white polycarbonate abutment analogs and the pouring of a stone dental model.


7. Soft-tissue model showing a 10.0mm tall aluminum oxide sleeve and a white polycarbonate 5.0mm abutment analog.


8. Model showing a completed bicuspid all-ceramic crown which was made by adding porcelain directly to the aluminum oxide sleeve.


9. A bicuspid and molar all-ceramic crown seated on a soft-tissue model.


10. Emergence cuffs were snapped onto the shouldered abutments to help form and maintain their soft tissue sulcus while the all-ceramic crowns were being fabricated.


11. Occlusal view of 5.0mm wide shouldered abutments prior to the seating of the all-ceramic crowns.


12. A mirror view of two all-ceramic crowns showing the internal aspect of the aluminum oxide sleeves on which porcelain was directly added during the fabrication of the crowns.


13. An operative radiograph revealing the incomplete seating of the all-ceramic crowns. Incomplete seating usually indicates the need for: adjustment of the interproximal contacts, adjustment of the abutment post, or the intra-oral re-orientation of the seated abutments due to a discrepancy of its orientation with that of its analog in the dental model.



14. Radiograph revealing the completely seated crowns after the intra-oral modification of their abutment posts.


15. Buccal view of the cemented all-ceramic crowns revealing the predictably aesthetic cervical crown/implant interface.
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