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Tooth Morphology-2

 July 28, 2013 |  admin |  Lecture series, Faculty Development Program Series
Questions
Answer
On the occlusal surface of posterior teeth triangular fossa are found
along the
Proximal to marginal ridge
If found, in anterior teeth, the triangular fossa is usually found on
the
Palatal surface at edge of lingual fossa
A long valley like depression in any surface of tooth often between
ridges/ cusp is the
Sulcus
A sulcus at its junction of its incline usually has a
Groove
A shallow line between primary parts of a crown or a root is the
Developmental groove
A shallow line on any surface of tooth that does not demarcate
primary parts of  a tooth is the
Supplemental groove
The pinpoint depressions along the developmental grooves are the
Pits
Lobes are primary section of formation in the development of crown
and are represented by the
Cusp; Mamelons; Cingulum
The number of line angles and point angles in an anterior teeth
6; 4
The number of line angles and point angles in a posterior teeth
8; 4
The important indicator(s) of dental age used clinically often is
(are)
Calcification extent; Level of root formation; Eruption of teeth
The evidence of calcification for a deciduous dentition is observed
by
4th month of intra uterine life. Near the end of the 6th month of
intrauterine life all deciduous teeth would have began their development.
The human deciduous mandibular central incisors erupt by
6 months
The human deciduous canine erupt by
16 months
The general order of deciduous teeth eruption is
Central incisor, lateral incisor, 1st molar, canine, 2nd molar
The deciduous teeth is use for approximately for
5 to 11.5 years
Second permanent tooth to erupt in the oral cavity is
Mandibular central incisor. First molar is the first permanent teeth
to erupt in the oral cavity.
The follicles of developing anterior teeth are positioned
Lingual. The developing premolars are placed within the bifurcation
of deciduous molars.
The general eruption schedule of permanent dentition in mandible is
6123457. The maxillary schedule is 6124537
The teeth that is subject to many anomalies and variation in the form
is the
Permanent third molars

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