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CAMLOG&Science – Chapter 2
Stability of the implant-abutment connection is of high importance for the
long-term success of implant-based prosthetic reconstructions. An imprecise
connection may impair screw joint stability and result in unfavorable load
transmission to the components of the reconstruction. Connection stability
depends on the precision of fit, which is influenced by the design of the
connection as well as by manufacturing tolerances. Numerous studies have
been performed to analyze the connection stability of the CAMLOG
®
and
CONELOG
®
Implant Systems and to compare both to other implant systems.
PRECISION IN REPRODUCING THE ABUTMENT POSITION
To ensure a precise fit of an implant-supported restoration, the reproduction
of the exact abutment position in the patient’s mouth and the laboratory is of
fundamental importance since during superstructure fabrication, multiple
repositioning of the implant components is required.
Reinert and Geis-Gerstorfer (2007) studied the fit of the dental prosthetic com-
ponents of the CAMLOG
®
, OSSEOTITE
®
Certain, BPI, FRIALIT
®
and Straumann
synOcta
®
implant systems in vitro. In this study, the situation of an edentulous
maxilla was simulated with the aid of titanium demonstration models. Four
implants were distributed over the titanium models in the shape of a polygon
(slope of implant axis: 15° or 20°) and bonded with a bonding adhesive. Im-
pressionswere taken fromeach titaniummodel under standardized conditions,
and plaster casts were fabricated. The precision of the systems was inves-
tigated by measuring six distances between the four connected abutments of
the demonstration models using a 3-D coordinate measuring machine (Fig. 3).
These measured values vary depending on design and fabrication precision.
The measuring variance is an indicator for the accuracy of fit of the entire
system including implant, impression post, lab analogue and abutment.
STABILITY OF
IMPLANT-ABUTMENT
CONNECTIONS
Fig. 3:
Schematic representation of the implant arrangement in the demonstration model and the
corresponding measuring distances. (Adapted from Reinert and Geis-Gerstorfer (2007)). Measuring
distance A = imp1 – imp2, B = imp1 – imp3, C = imp1 – imp4, D = imp2 – imp3, E = imp2 – imp4,
F = imp3 – imp4
imp 1
imp 4
imp2
imp3