|
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 |
Prof. Rooban Thavarajah
Oral and Maxillofacial Pathologist
List