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Prevalence and distribution of selected developmental dental anomalies in an Indian population.
[dentinogenesis imperfecta]
The
purpose
of
this
study
was
to
determine
the
prevalence
of
developmental
dental
anomalies
in
an
Indian
population
and
to
statistically
analyze
the
distribution
of
these
anomalies
.
The
study
was
based
on
clinical
examination
,
evaluation
of
dental
casts
,
and
panoramic
radiographs
of
1123
Indian
subjects
(
572
males
,
551
females
)
,
who
visited
the
outpatient
clinic
at
Government
Dental
College
,
Indore
between
November
2009
and
September
2010
,
after
obtaining
their
informed
consent
.
These
patients
were
examined
for
the
following
developmental
dental
anomalies
:
shape
anomalies
(
microdontia
,
talon
cusp
,
dens
evaginatus
,
fusion
,
taurodontism
)
,
number
anomalies
(
hypodontia
,
oligodontia
,
anodontia
)
,
structural
anomalies
(
amelogenesis
imperfecta
,
dentinogenesis
imperfecta
)
and
positional
anomalies
(
ectopic
eruption
,
rotation
,
impaction
)
.
The
percentages
of
these
anomalies
were
assessed
for
the
whole
group
and
compared
using
statistical
analysis
.
Among
the
1123
subjects
,
a
total
of
385
individuals
(
34
.
28
%
)
presented
with
the
selected
developmental
dental
anomalies
.
The
distribution
by
sex
was
197
males
(
34
.
44
%
)
,
and
188
females
(
34
.
06
%
)
.
Out
of
the
total
1123
individuals
,
351
(
31
.
26
%
)
exhibited
at
least
one
anomaly
,
28
(
2
.
49
%
)
showed
two
anomalies
and
6
(
0
.
53
%
)
displayed
more
than
two
anomalies
.
P
values
indicated
that
the
dental
anomalies
were
statistically
independent
of
sex
.
On
intergroup
comparison
,
positional
anomalies
were
significantly
most
prevalent
(
P
<
0
.
05
)
in
the
Indian
population
.
The
most
common
developmental
dental
anomaly
was
rotation
(
10
.
24
%
)
,
followed
by
ectopic
eruption
(
7
.
93
%
)
.
The
next
common
group
was
number
anomalies
.
The
most
common
number
anomaly
was
hypodontia
(
4
.
19
%
)
,
which
had
a
higher
frequency
than
hyperdontia
(
2
.
40
%
)
.
Analyzing
the
next
prevalent
group
of
shape
anomalies
,
microdontia
(
2
.
58
%
)
was
found
to
be
the
most
common
,
followed
by
taurodontism
(
2
.
49
%
)
,
dens
evaginatus
(
2
.
40
%
)
and
talon
cusp
(
0
.
97
%
)
.
Dentinogenesis
imperfecta
(
0
.
09
%
)
was
the
rarest
,
followed
by
amelogenesis
imperfecta
(
0
.
27
%
)
and
fusion
(
0
.
27
%
)
.
Diseases
Validation
Diseases presenting
"taurodontism"
symptom
dentin dysplasia
dentinogenesis imperfecta
oligodontia
This symptom has already been validated
