How many pits are seen in maxillary 1st premolar?
The lingual cusp of the maxillary first premolar is the shortest of the four maxillary premolar cusps. The lingual portion of the crown is convex and has a spheroidal form.
What is unique about the maxillary first premolar?
The maxillary first premolar has two cusps with the buccal cusp prominently larger than the palatal cusp. This tooth is said to exhibit the greatest variation in root anatomy and root canal morphology2,3,4.
What tooth number is the first premolar?
21
Number 21: 1st Bicuspid or 1st premolar.
How do you identify first and second premolars?
The key difference between the first and second premolars is based on their buccal side view. The first premolars are very sharp in their buccal side, whereas the second premolars are less sharp in their buccal side.
Is the maxillary first or second premolar larger?
In the same mouth, maxillary first premolars are most often larger in most dimensions than adjacent second premolars. Characteristically, central developmental grooves run mesiodistally across the center of both types of maxillary premolars extending from a mesial pit to a distal pit.
What number is first premolar?
Number 28: 1st Bicuspid or 1st premolar.
What is the function of the first premolar?
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. Mandibular first premolars have two cusps. The one large and sharp is located on the buccal side (closest to the cheek) of the tooth.
Which tooth number is first premolar?
What type of tooth is the maxillary first premolar?
Arch position – The maxillary first premolar is the fourth permanent tooth from the midline. It has a mesial contact with the permanent maxillary canine, and a distal contact with the second premolar. It replaces the deciduous maxillary first molar, and hence is a succedaneous tooth. b.
What are the characteristics of the permanent maxillary second premolar?
The Permanent Maxillary Second Premolar: 1. General characteristics: a. Arch position – The permanent maxillary second premolar is the fifth tooth from the midline. It shares a mesial contact with the maxillary first premolar and a distal contact with the maxillary first molar.
What are the fossae of the maxillary premolars?
Fossae – Fossae are the general depressed areas on the occlusal surfaces of posterior teeth, and the maxillary premolars normally display two of them. i. Mesial triangular fossa – This fossa is roughly triangular in shape, and is bounded by the mesial marginal ridge, the transverse ridge, and the mesial cusp ridges of the two cusps. M ii.
How many pits does the occlusal surface of the maxillary first premolar exhibit?
The occlusal surface of the maxillary first premolar normally exhibits two pits, which are located in the deepest portion of the two fossae. They are named by location: