Mandibular Incisors
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Mandibular Incisors - Operative Dentistry - Lecture Slides, Slides of Dental surgery
Mandibular Incisors, Labial Aspect, Permanent Teeth, Lingual Aspect, Incisal Edge, Cervical Line, Mesial Aspect, Labiolingual Diameter, Deflection of Root, Mandibular Arch. Exact name of subject is Operative Dentistry. I have 24 lectures, each one has own main topic.
Typology: Slides
2011/2012
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Mandibular Incisors
Introduction
Mandibular incisors are four in number
Mandibular central incisor and lateral are similar in anatomy and complement each other in function
They are smaller than the maxillary incisors
Mandibular central incisor erupts between the age of 6 and 7
Mandibular lateral incisor erupts between the age of 6 and 8
Lingual aspect
The lingual aspect is concave from the incisal edge to the cervical line
Cingulum is smooth and barely visible
The surface is smooth and devoid of any grooves. No other tooth in the mouth, except the mandibular lateral incisor, shows so few developmental lines and grooves.
Mesial aspect
The labial outline is almost straight, except near cervical third where it is convex
The lingual margin is ‘S’ shaped
The cervical line on the mesial and distal surface is convex incisally
Root
The root is single and straight.
The deflection of the root if present is on the labial or
distal side.
9.0 12.5 5.0 3.5 6.0 5.3 3.0 2.
Curvature ofCervical Line M D
Labiolingual Diameter at Cervical Line
Labiolingual Diameter at Crest of Curvature
Mesiodistal Diameter at Cervical Line
Mesiodistal Diameter at Contact Area
CrownLength Root Length
Average Dimensions in millimeters
Mandibular Lateral Incisor
Mandibular lateral incisor is slightly wider mesiodistally
The concavity in the lingual aspect is slightly more when compared to mandibular central incisor
The cervical portion of the lingual aspect is narrower while the incisal portion is wider. This gives the crown a more or less a fan shaped appearance
The incisal edge follows the mandibular arch, giving the crown a slightly twisted appearance on its root