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Femoral trochlear dysplasia after patellar dislocation in rabbits.
[trochlear dysplasia]
The
aim
of
this
study
was
to
investigate
the
effects
of
patellar
dislocation
on
the
development
of
the
trochlear
groove
in
rabbits
.
Eighty
knees
from
forty
one
-
month
-old
white
rabbits
were
divided
into
three
groups
(
sham
surgery
,
experimental
,
control
)
.
Lateral
patellar
dislocation
was
established
in
the
experimental
group
and
the
effect
on
the
development
of
the
trochlear
groove
was
compared
with
that
in
the
sham
surgery
and
control
groups
.
Computed
tomography
(
CT
)
scans
were
conducted
to
measure
the
angle
,
width
and
depth
of
the
trochlear
groove
one
month
and
six
months
after
surgery
.
Gross
specimen
examination
,
cross-sectional
anatomy
and
histological
observation
were
conducted
to
investigate
the
anatomical
configuration
of
the
femoral
trochlea
and
the
changes
in
cartilage
tissue
of
the
trochlear
groove
at
six
months
after
surgery
.
At
six
months
after
surgery
,
CT
scans
showed
a
significant
difference
between
the
sham
surgery
group
and
the
experimental
group
in
the
angle
,
width
and
depth
of
the
trochlear
groove
.
There
were
no
significant
differences
between
the
sham
surgery
group
and
the
control
group
.
Gross
specimen
examination
and
cross-sectional
anatomy
indicated
low
lateral
femoral
trochlea
and
reduced
height
at
the
trochlear
groove
in
the
experimental
group
.
The
femoral
trochlea
was
of
normal
appearance
in
the
other
two
groups
.
Histological
investigations
showed
that
there
were
degenerative
changes
in
the
cartilage
tissue
of
the
femoral
trochlea
in
the
experimental
group
.
Secondary
femoral
trochlear
dysplasia
may
be
caused
by
patellar
dislocation
in
a
normally
developing
femoral
trochlea
.
Patellar
dislocation
may
be
one
of
the
causes
of
femoral
trochlear
dysplasia
.
