ANSWERS FOR YESTERDAYS QUESTIONS
|
Questions
|
Answer
|
|
The postnatal period
of development of deciduous dentition spans about |
30 months. The second
molars erupt at about 24 to 26 months and root formation completes at least 6 months later. |
|
The primary dentition
remains intact till the child is |
6 years. The deciduous
mandibular incisors shed usually after the first molars emerge in to the oral cavity and is usually about 6 years of age. Moreover, once the 6-year molar erupts in to oral cavity the dentition is transformed to the mixed dentition stage. |
|
The period of mixed
dentition lasts from |
6 to 13 years. The
mixed dentition stage is initiated once the permanent first molar erupts (6 years) to the shedding of deciduous mandibular second molar (12 to 13 years). |
|
Mixed dentition begins
with |
Eruption of permanent
first molars. Eruption of permanent first molars is the first occurring event in the oral cavity and usually simultaneous with the resorption/ shedding of deciduous mandibular incisors. |
|
The teeth that replace
exfoliated deciduous teeth are the |
Succedaneous teeth.
The Succedaneous teeth are maxillary and mandibular incisors, canine and premolars. |
|
The teeth that do not
have predecessor teeth are |
The correct answer is
the maxillary and mandibular molars |
|
Pulp chamber is the
space occupied by |
Pulp in crown. Pulp in
root is the pulp canal |
|
Pulp cavity is made up
of |
Pulp canal and
chamber |
|
The bone of tooth
socket is the |
Alveolus. Lamina
propria is a radiological image of the periodontal ligament fibers whereas maxilla and mandible hold the alveolus |
|
The teeth that have
their mesial surfaces in contact is the |
Maxillary and
mandibular central incisors |
|
The teeth that has no
distal contact area is the |
Deciduous second molar
|
|
An elevation on the
crown portion of a tooth on its occlusal surface is the |
Cusp
|
|
An elevation on some
portion of crown produced by abnormal enamel deposition is the |
Tubercle
|
|
The lingual lobe of
anterior teeth are represented as |
Cingulum
|
|
A linear elevation on
any surface of tooth is a |
Ridge
|
|
The ridge that
descends from cuspal tip towards the central part of the occlusal surface in maxillary molars are the |
Triangular ridge.
Marginal ridge runs along the margin of cusp while transverse ridge and oblique ridge run across the molar tooth |
|
The triangular ridge
resembles a _________side of a triangle |
Two
|
|
A union of two
triangular ridge is called as the |
Transverse ridge
|
|
The union of
triangular ridge of distobuccal cusp and distal ridge of mesiolingual cusp is the |
Oblique ridge
|
|
A irregular depression
on any surface of the crown is a |
Fossa
|