PART SELECTION (screw retained) ALL CERAMIC

Zirconia frame
The success of screw retained all ceramic restorations depends
in large part on the correct implant placement. Screw access holes
for anterior restorations need to emerge through the lingual aspect
of the restoration without being angled toward the labial. Egress
of the screw access hole for posterior restorations needs to be
dead center of the occlusal surface without being angled towards
the buccal or lingual.
Single restoration

100% Zirconia
Single unit all ceramic screw retained restorations can only be
achieved either with a 100 percent zirconia abutment or the metal
indexing feature has to be removable. Not all implant brands offer
zirconia abutments of this kind. Third party (Atlantis) and in
some instances competitors (Nobel Biocare) can mill through and
through custom zirconia abutments for this purpose.
Splinted restoration

Zirconia interface
Screw retained all ceramic bridges need to be milled out of a
single block of zirconia. The bridge frame work has to be
first designed in acrylic with temporary abutments and tried in
the patients mouth to verify passive fit. A zirconia bridge, once
milled can not be adjusted in case of poor seating and ill fit.
Few manufacturers (Nobel Procera) can produce zirconia frameworks
for a screw retained bridge.