oral surgery
feature
Blood was collected from the median
cubital vein of the patient (Fig. 10)-the
extracted blood was centrifuged for 12
minutes at 2,800 rpm, using a plain vacuum
tube sous-vide without additive. Platelet-rich
fibrin (PRF) (Fig. 11) was made to help elevate
the sinus-floor Schneiderian membrane.
The PRF was used through the osteotomy
to elevate this membrane (Fig. 12), and the
implant was placed through the prepared
site to ensure a good primary stability (Fig.
13). An implant 3.5mm in diameter, 8.5mm
long was inserted. However, because of the
thin ridge and buccal defect, about 4mm
of the implant body showed through the
buccal side (Fig. 14).
A buccal incision was made to expose the
external oblique ridge of the mandible. To
collect autogenous bone from the external
oblique ridge, I used a bone collector that
was 5mm in diameter, with a 2mm cutting
depth (Fig. 15). A first layer of autogenous
bone was placed with direct contact to the
exposed implant surface (Fig. 16), then a mix
of corticocancellous granules (particle size
less than 2mm) and the patient's autogenous
bone was used as a second layer to protect
the autogenous bone cells that were in direct
contact with the implant (Figs. 17-18; Fig.
18 is on p. 72).
Fig. 10: Blood extraction for platelet-rich
fibrin (PRF) membrane preparation
Fig. 14: Buccal view of the implant site
showing bone dehiscence
Fig. 11: PRF membrane
Fig. 15: Bone harvesting from the external
oblique ridge
Fig. 12: Sinus floor elevation using
PRF membrane
Fig. 16: Augmenting the site
Fig. 13: Implant placement and the narrow ridge
70
Fig. 17: Fully augmented site
Continued on p. 72
SEPTEMBER 2016 // dentaltown.com
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Table of Contents for the Digital Edition of Dentaltown September 2016