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1. INDIAN DENTAL ACADEMY
Leader in continuing dental education
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2. Dental age
• Chronological and dental age are synchronous in the
normal patient.
• A child is labeled as an early or late developer if
there is a difference of +/- 2 years from the average
value.
• If the chronologic age of the patient is younger than
the dental age, one can rely on increased growth to
a greater degree than when dental age is retarded in
relation to the chronologic age ( and possibly
biologic age).
• Dental age can be determined two methods:
• - Stage of eruption
• - stage of tooth mineralization on radiograph
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3. Stage of Eruption
• Determination of dental age from observation of
eruption has been the only method available for a
long time
• In certain cases however, the accuracy of the
method is limited.
• During the quiescent period in eruption, this
appoach is inadequate.
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4. Stage of tooth mineralization on
radiograph (Demirjian et al 1973)
• When determining dental age radiographically
according to the stages of germinations, the degree of
the development of individual teeth is compared to a
fixed scale.
• For age determination one does not rely on the last
stage of tooth formation but on the entire process of
dental mineralization.
• The procedure can be used for the entire deciduous
and mixed dentition period, and is not influnced by
early loss of deciduous teeth.
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5. • The calculation is made using a point evaluation
system.
• Each tooth is given a point value according to its
state of development.
• The sum of individual points gives the
development value, which can be transferred into
the dental age with the aid of standard tables.
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6. • The smaller the sum of points, the younger the
dental age; the higher the sum, the older the dental
age.
• Experience shows that the method is sufficiently
accurate if the stage of mineralization of teeth 1-7
in the left lower quadrant is examined.
• The procedure is not valid for patients with several
congenitally absent teeth.
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7. Thank you
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