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Tooth morphology-3

 July 30, 2013 |  admin |  Lecture series, Faculty Development Program Series
Questions
Answer
The formation of
each centre of cusp formation proceed till they
Coalesce
Signs of
demarcation between the formation of each developmental lobe is by the
Developmental
groove
Formation of
tooth is said to be completed when tooth
Apex is formed
Root formation of
deciduous teeth is complete within
36 – 48 months
after tooth eruption
The most unstable
teeth in the deciduous dentition are the
Second molars and
maxillary incisors
The highest peak
of caries attack is observed during
13 years
The
susceptibility of dental caries is a function of
Exposure time;
Oral environment; Morphological type and surface of teeth
The period of
exfoliation of deciduous dentition is the
7th – 12th year
The crown of
deciduous mandibular first molar resemble the crown of
The crown of
deciduous mandibular first molar does not resemble the crown of any teeth –
deciduous or permanent dentition
As compared to
the permanent dentition, the deciduous anterior teeth have
Prominent
cervical ridge; Narrower cervical margin; Flared roots in the posterior teeth
As compared to
the permanent teeth the buccolingual diameter of the deciduous teeth is
Less
As compared to
the permanent teeth the ratio of crown length to mesiodistal width, the
deciduous teeth is
Higher
As compared to
permanent dentition, the tooth length to root length of anterior deciduous
teeth appear
Narrower and
longer
The purpose of
flaring in the deciduous molar roots is (are)
To accommodate
developing permanent premolars
Crown and root of
deciduous molars at the cervical portion are
Slender
mesiodistally
As compared to
permanent dentition, the cervical ridges in deciduous teeth are
More pronounced
As compared to
permanent dentition, the occlusal surface in deciduous teeth are
Narrower
As compared to
permanent dentition, the pulp horns and chambers in deciduous teeth are
High and large.
Though it is observed in all teeth, it is obvious in mesial pulp horns of all
teeth.
The mesiodistal
diameter is greater than the cervicoincisal length in
Deciduous
maxillary central incisor; Permanent maxillary central incisor; Permanent
molars. For the permanent maxillary central incisor the mesiodistal diameter
is lesser than the cervicoincisal length.
As compared to
permanent maxillary central incisor, the tooth length to root length of
anterior deciduous maxillary central incisor have
Increased root
length

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