NEET MDS Shorts
72434
Dental Anatomy
Well over 50% of maxillary 1st molars have two canals in the mesiobuccal root. Some authors cite the number as high as 90%. There are usually 3 roots and 4 canals in a maxillary 1st molar.
The fourth canal, the mesiolingual canal, is also referred to as: the accessory mesiobuccal canal, mesiocentric, mesiopalatal canal or MB2.
It is usually tough to find MB2 through clinical inspection and it is not obvious on a radiograph. A dentist should expect it is present before beginning a root canal on the first maxillary molar.
44156
Dental AnatomyA mandibular primate space is usually found in the primary dentition between canine and first molar
37480
Dental AnatomyThe canine eminence is an osseous structure surrounding the root of a canine on the facial aspect
49049
Dental AnatomyDuring eruption of permanent teeth, alveolar bone is resorbed and deposited intermittently
60063
Dental AnatomyIn the case of primary teeth, the roots are often resorbed as the permanent teeth develop. The facial aspect of the root tends to be the last area to undergo resorption due to its position and the way the succedaneous tooth exerts pressure. The facial root surface is generally more stable and remains attached to the gingiva longer than the other aspects, making it the longest and most securely attached during extraction.
67053
Dental AnatomyThe primary canine is usually exfoliated between the ages of 10 and 11 years
82193
Dental Anatomypermanent maxillary First molar teeth normally has four root canals
73875
Dental AnatomyThe most constant and valuable trait to differentiate among maxillary first second and third molars is the depth of central fossae
64908
Dental AnatomyThe primary mandibular central incisors usually erupt at 6-8 months
62543
Dental AnatomyThe average overall length of the permanent maxillary central incisor is 22.5 mm