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[Sandwich osteotomy--a biologic method for vertical augmentation of edentulous alveolar ridges].
[oligodontia]
Vertical
augmentation
for
rehabilitation
with
dental
implants
poses
a
clinical
challenge
.
The
surgical
obstacles
have
been
extensively
documented
within
the
literature
.
Outcomes
of
the
multiple
methods
available
are
not
predictable
,
and
overall
success
rates
are
sub-optimal
.
This
paper
presents
the
Sandwich
Osteotomy
Technique
(
interpositional
rhBMP-
2
and
bone
subtitute
grafting
)
in
a
young
female
with
congenital
oligodontia
.
The
uniqueness
of
this
method
,
like
in
distraction
osteogenesis
,
is
that
the
segmental
bone
remains
attached
to
the
mucoperiosteal
flap
and
thus
the
blood
supply
is
maintained
.
Bone
graft
or
substitute
is
introduced
into
the
interpositional
space
that
was
created
.
Advantages
of
Sandwich
Osteotomy
are
minimal
bone
exposure
,
good
blood
supply
,
no
need
for
donor
bone
graft
and
minimal
overall
morbidity
.
Limitations
of
the
technique
are
soft
tissue
stretching
,
gingival
fibrosis
,
and
high
technical
demand
.
According
to
our
experience
with
this
surgical
method
,
vertical
augmentation
is
stable
up
to
8
mm
.
Beyond
this
height
approximately
10
%
bone
resorption
was
noticed
.
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"substitute is introduced into the interpositional space that was created"
symptom
oligodontia
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