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SMALL DIAMETER
implants
Planning from the
Prosthetic Perspective
with Bradley C. Bockhorst, DMD
Whether you’re placing small-diameter or conventionaldiameter
implants for an overdenture, the case must be
planned from surgical and prosthetic perspectives. The
restorative aspect of the Inclusive ® Mini Implant involves
encasing the O-ring housings within the denture base and
creating a parallel line of draw.
O-ring Housing Dimensions
4.75 mm
The height of the O-ring housing is 3.5 mm (Fig. 1). There
is a space of approximately 1.0 mm between the top of
the collar and the base of the O-ring housing to allow
the housing to be rotated in cases where the implants
are divergent. The housings can accommodate up to
30 degrees of angular divergence between implants.
However, the implants should be placed parallel to one
another as much as possible to provide an ideal prosthetic
fit and to avoid excessive wearing of the O-rings.
There should be a minimum of 3 mm thickness of acrylic
in the denture base above the housing to provide adequate
strength to the prosthesis. Therefore, there should be at
least 8 mm of vertical space from the top of the collar. The
denture teeth would be in addition to this space.
1.0 mm
Figure 1: O-ring housing with 3.5 mm height
3.5 mm
– Small Diameter Implants: Planning from the Prosthetic Perspective – 31