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Prevalence of dental anomalies among 7- to 35-year-old people in Hamadan, Iran in 2012-2013 as observed using panoramic radiographs.
[dentin dysplasia]
This
study
was
performed
to
evaluate
the
prevalence
of
all
types
and
subtypes
of
dental
anomalies
among
7
-
to
35
-
year
-old
patients
by
using
panoramic
radiographs
.
This
cross-sectional
study
was
conducted
on
1649
people
in
Hamadan
City
,
in
2012
-
2013
.
The
prevalence
of
four
types
and
12
subtypes
of
dental
anomalies
was
evaluated
by
two
observers
separately
by
using
panoramic
radiography
.
Dental
anomalies
were
divided
into
four
types
:
(
a
)
shape
(
including
fusion
,
taurodontism
,
and
dens
invagination
)
;
(
b
)
number
(
including
hypodontia
,
oligodontia
,
and
hyperdontia
)
;
(
c
)
structure
(
including
amelogenesis
imperfecta
,
dentinogenesis
imperfecta
,
and
dentin
dysplasia
)
;
and
(
d
)
position
(
including
displacement
,
impaction
,
and
dilacerations
)
.
The
reliability
between
the
two
observers
was
79
.
56
%
according
to
the
Kappa
statistics
.
The
prevalence
of
dental
anomalies
diagnosed
by
panoramic
radiographs
was
29
%
.
Anomalies
of
position
and
number
were
the
most
common
types
of
abnormalities
,
and
anomalies
of
shape
and
structure
were
the
least
in
both
genders
.
Anomalies
of
impaction
(
44
.
76
%
)
,
dilacerations
(
21
.
11
%
)
,
hypodontia
(
15
.
88
%
)
,
taurodontism
(
9
.
29
%
)
,
and
hyperdontia
(
6
.
76
%
)
were
the
most
common
subtypes
of
dental
anomalies
.
The
anomalies
of
shape
and
number
were
more
common
in
the
age
groups
of
7
-
12
years
and
13
-
15
years
,
respectively
,
while
the
anomalies
of
structure
and
position
were
more
common
among
the
other
age
groups
.
Anomalies
of
tooth
position
were
the
most
common
type
of
dental
anomalies
,
and
structure
anomalies
were
the
least
in
this
Iranian
population
.
The
frequency
and
type
of
dental
anomalies
vary
within
and
between
populations
,
confirming
the
role
of
racial
factors
in
the
prevalence
of
dental
anomalies
.
Diseases
Validation
Diseases presenting
"common type"
symptom
alexander disease
cutaneous mastocytosis
dedifferentiated liposarcoma
dentin dysplasia
dentinogenesis imperfecta
erythropoietic protoporphyria
esophageal carcinoma
hereditary cerebral hemorrhage with amyloidosis
liposarcoma
oculocutaneous albinism
oligodontia
pendred syndrome
pleomorphic liposarcoma
pyomyositis
well-differentiated liposarcoma
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