Hybrid Restorations with the CAMLOG Implant System (PDF

HYBRID RESTORATIONS WITH THE CAMLOG ® IMPLANT SYSTEM
DOUBLE CROWN
RESTORATIONS
PROCESSING THE CAMLOG ® ABUTMENTS
EXAMPLE OF THE CAMLOG ® UNIVERSAL ABUTMENT
After fabricating the cast, the CAMLOG ® universal abutments are inserted
into the CAMLOG ® lab analogs and fixed with the CAMLOG ® lab screw.
A previously prepared silicone index is used to mark the height and axis
alignments.
The height of the abutments is first adjusted. The height of the circular functional
surface must not fall below 5 mm, otherwise sufficient retention
strength of the construction cannot be achieved. The uniform insertion
direction is then determined and the abutments are machined with suitable
abrasives in the parallelometer. The specified speeds of each abrasive used
for titanium machining must be observed.
Overheating the titanium leads to a very hard surface (alpha case layer) and
should be avoided.
For fabrication of double crowns using the electroplating technique, the
manufacturer's specifications must be observed. Cast fabrication of double
crowns are prepared similar to the cone telescopic crown technique. To prevent
the caps from rotating, the abutments are lightly ground in oval form.
The surface must be homogeneous.
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The space for the tertiary framework required to receive the secondary
crowns can be tested at every phase of preparation with the silicone index
with the denture teeth in position.
Check of the space conditions with the silicone index on the working cast
FABRICATING THE SECONDARY CROWNS
The secondary crowns or superstructure are then fabricated. The tensionfree
seat of the superstructure is of paramount importance for the longterm
success of an implant-prosthetic restoration. We recommend bonding
the secondary copings intraorally in the tertiary framework (passive fit).
NOTES
Electroformed secondary copings
Electroforming is conducted as specified by the manufacturer. The
CAMLOG ® abutments are inserted into a CAMLOG ® lab analog of the
appropriate diameter and fixed with a CAMLOG ® lab screw. The thickness
should be 0.2–0.3 mm. The special feature of the low layer thickness
of the electroformed components and the resulting low stability of
the secondary coping prevent direct polymerization in the acrylic
denture base. For this reason, a tertiary framework must be fabricated
over the secondary copings for reinforcement.
Cast secondary copings
The wall thickness of the secondary copings should be approx. 0.5 mm.
Fabrication is similar to standard crown and bridge technique.
CAUTION
Do not mix up the CAMLOG ® abutments and secondary copings! We
recommend a color buccal marker on the abutment, coping and working
cast.