The most common morphology of the maxillary first molar is three roots and four canals..
What is the anatomy of the first molar mandible?
Mandibular first molars usually have two roots (Fig. 1.74), one mesial and one distal. The mesial root exits the crown in a mesial direction and then gradually curves distally in the apical third. The distal root is narrower buccolingually but equal in mesiodistal width compared to the mesial root..
What is the anatomy of the first molar maxillary?
The maxillary first molar is normally the largest tooth in the maxillary arch. It has four well-developed functioning cusps and one supplemental cusp of little practical use. The four large cusps of most physiological significance are the mesiobuccal, the distobuccal, the mesiolingual, and the distolingual.Jan 9, 2015.
Geometric shape: The occlusal aspect the maxillary 1st molar is rhomboidal with two acute angles and two obtuse angles. Its sides are not equal. Two obtuse angles are—distobuccal and mesiolingual.
The anatomical characteristics of permanent maxillary molars are complex and are generally described as teeth with three roots: Two buccal root canals and one palatal root canal[1]. In recent years, two palatal and two mesiobuccal root canals have been reported separately[2].
The primary maxillary first molar is unique, it looks resembles a molar and a premolar. Its occlusal surface consists of four prominent cusps, mesiobuccal, distobuccal distobuccal and distolingual. This gives the tooth a square look and there are three slender roots.
Dental anatomy maxillary first molar
Human tooth
The maxillary first premolar is one of two teeth located in the upper jaw, laterally from both the maxillary canines of the mouth but mesial from both maxillary second premolars. The function of this premolar is similar to that of canines in regard to tearing being the principal action during mastication, commonly known as chewing. There are two cusps on maxillary first premolars, and the buccal cusp is sharp enough to resemble the prehensile teeth found in carnivorous animals. There are no deciduous maxillary premolars. Around 10-11 years of age, the primary molars are shed and the permanent premolars erupt in their place. It takes about 3 years for the adult premolar and its root to fully calcify. Due to its long buccal root with narrow root canal and short palatal root with wide root canal, the upper 1st premolar is very prone to fracture during exodontia, hence, it is sometimes referred to some dentists as the King of Fracture. In the universal system of notation, the permanent maxillary premolars are designated by a number. The right permanent maxillary first premolar is known as 5, and the left one is known as 12. In the Palmer notation, a number is used in conjunction with a symbol designating in which quadrant the tooth is found. For this tooth, the left and right first premolars would have the same number, 4, but the right one would have the symbol, ┘, underneath it, while the left one would have, └. The international notation has a different numbering system than the previous two, and the right permanent maxillary first premolar is known as 14, and the left one is known as 24.
