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Failures and complications in patients with birth defects restored with fixed dental prostheses and single crowns on teeth and/or implants.
[dentinogenesis imperfecta]
To
assess
retrospectively
,
over
at
least
5
years
,
the
incidences
of
technical
and
biological
complications
and
failures
in
young
adult
patients
with
birth
defects
affecting
the
formation
of
teeth
.
All
insurance
cases
with
a
birth
defect
that
had
crowns
and
fixed
dental
prostheses
(
FDPs
)
inserted
more
than
5
years
ago
were
contacted
and
asked
to
participate
in
a
reexamination
.
The
median
age
of
the
patients
was
19
.
3
years
(
range
16
.
6
-
24
.
7
years
)
when
prosthetic
treatment
was
initiated
.
Over
the
median
observation
period
of
15
.
7
years
(
range
7
.
4
-
24
.
9
years
)
and
considering
the
treatment
needs
at
the
reexamination
,
19
out
of
33
patients
(
58
%
)
with
reconstructions
on
teeth
remained
free
from
all
failures
or
complications
.
From
the
patients
with
FDPs
and
single
unit
crowns
(
SCs
)
on
implants
followed
over
a
median
observation
period
of
8
years
(
range
4
.
6
-
15
.
3
years
)
,
eight
out
of
17
%
or
47
%
needed
a
retreatment
or
repair
at
some
point
due
to
a
failure
or
a
complication
.
From
the
three
groups
of
patients
,
the
cases
with
amelogenesis
/
dentinogenesis
imperfecta
demonstrated
the
highest
failure
and
complication
rates
.
In
the
cases
with
cleft
lip
,
alveolus
and
palate
(
CLAP
)
or
hypodontia
/
oligodontia
,
71
%
of
the
SCs
and
73
%
of
the
FDPs
on
teeth
(
FDP
T
)
remained
complication
free
over
a
median
observation
period
of
about
16
years
.
Sixty
-
two
percent
of
the
SCs
and
64
%
of
the
FDPs
on
implants
remained
complication
free
over
8
years
.
Complications
occurred
earlier
with
implant-supported
reconstructions
.
Because
healthy
,
pristine
teeth
can
be
left
unprepared
,
implant-supported
SCs
and
FDPs
are
the
treatment
choice
in
young
adults
with
birth
defects
resulting
in
tooth
agenesis
and
in
whom
the
edentulous
spaces
can
not
be
closed
by
means
of
orthodontic
therapy
.
However
,
the
trend
for
earlier
and
more
frequent
complications
with
implant-supported
reconstructions
in
young
adults
,
expecting
many
years
of
function
with
the
reconstructions
,
has
to
be
weighed
against
the
benefits
of
keeping
teeth
unprepared
.
In
cases
with
CLAP
in
which
anatomical
conditions
render
implant
placement
difficult
and
in
which
teeth
adjacent
to
the
cleft
require
esthetic
corrections
,
the
conventional
FDP
T
still
remains
the
treatment
of
choice
.
Diseases
Validation
Diseases presenting
"single unit crowns"
symptom
dentinogenesis imperfecta
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