Podcast
Questions and Answers
How many permanent maxillary incisors are there?
How many permanent maxillary incisors are there?
What is the primary function of the maxillary incisors?
What is the primary function of the maxillary incisors?
At what age does the eruption of the permanent maxillary central incisor typically occur?
At what age does the eruption of the permanent maxillary central incisor typically occur?
What shape is the labial outline of the crown of the permanent maxillary central incisor?
What shape is the labial outline of the crown of the permanent maxillary central incisor?
Signup and view all the answers
What distinguishes the incisal edge from the incisal ridge?
What distinguishes the incisal edge from the incisal ridge?
Signup and view all the answers
What is the calcification timeframe for the permanent maxillary central incisor?
What is the calcification timeframe for the permanent maxillary central incisor?
Signup and view all the answers
What occurs to the incisal ridge of an incisor after significant wear?
What occurs to the incisal ridge of an incisor after significant wear?
Signup and view all the answers
Which statement is true regarding the maxillary central and lateral incisors?
Which statement is true regarding the maxillary central and lateral incisors?
Signup and view all the answers
Which dimension of the permanent maxillary central incisor is greater?
Which dimension of the permanent maxillary central incisor is greater?
Signup and view all the answers
At what age does the crown of the maxillary lateral incisor complete its development?
At what age does the crown of the maxillary lateral incisor complete its development?
Signup and view all the answers
Which of the following is true about the maxillary lateral incisor?
Which of the following is true about the maxillary lateral incisor?
Signup and view all the answers
What is the significance of a palatogingival groove in maxillary incisors?
What is the significance of a palatogingival groove in maxillary incisors?
Signup and view all the answers
What happens if the lateral incisors are missing in some individuals?
What happens if the lateral incisors are missing in some individuals?
Signup and view all the answers
What is described as peg-shaped laterals in maxillary incisors?
What is described as peg-shaped laterals in maxillary incisors?
Signup and view all the answers
How does the mesiodistal width of the permanent maxillary central incisor compare to its labiolingual width?
How does the mesiodistal width of the permanent maxillary central incisor compare to its labiolingual width?
Signup and view all the answers
At what age does calcification of the maxillary lateral incisor begin?
At what age does calcification of the maxillary lateral incisor begin?
Signup and view all the answers
What is the Cervicoincisal (CI) Length of the permanent maxillary central incisor?
What is the Cervicoincisal (CI) Length of the permanent maxillary central incisor?
Signup and view all the answers
Where is the crest of curvature of the mesial outline located?
Where is the crest of curvature of the mesial outline located?
Signup and view all the answers
What shape is the root of the permanent maxillary central incisor?
What shape is the root of the permanent maxillary central incisor?
Signup and view all the answers
Which angle is relatively sharp on the permanent maxillary central incisor?
Which angle is relatively sharp on the permanent maxillary central incisor?
Signup and view all the answers
What is the mesiodistal diameter at the cervix of the permanent maxillary central incisor?
What is the mesiodistal diameter at the cervix of the permanent maxillary central incisor?
Signup and view all the answers
What features differentiate the labial and palatal aspects of the maxillary central incisor?
What features differentiate the labial and palatal aspects of the maxillary central incisor?
Signup and view all the answers
Which description is accurate for the distal outline of the crown?
Which description is accurate for the distal outline of the crown?
Signup and view all the answers
What developmental grooves are associated with the permanent maxillary central incisor?
What developmental grooves are associated with the permanent maxillary central incisor?
Signup and view all the answers
What shape does the labial outline of the crown of the permanent maxillary lateral incisor resemble?
What shape does the labial outline of the crown of the permanent maxillary lateral incisor resemble?
Signup and view all the answers
How does the mesial outline of the crown of the permanent maxillary lateral incisor differ from that of the central incisor?
How does the mesial outline of the crown of the permanent maxillary lateral incisor differ from that of the central incisor?
Signup and view all the answers
What is the typical crown length difference between the permanent maxillary lateral incisor and the central incisor?
What is the typical crown length difference between the permanent maxillary lateral incisor and the central incisor?
Signup and view all the answers
Where is the mesial contact area located on the permanent maxillary lateral incisor?
Where is the mesial contact area located on the permanent maxillary lateral incisor?
Signup and view all the answers
How does the distal outline of the crown of the permanent maxillary lateral incisor appear?
How does the distal outline of the crown of the permanent maxillary lateral incisor appear?
Signup and view all the answers
What is the curvature direction of the cervical line of the permanent maxillary lateral incisor?
What is the curvature direction of the cervical line of the permanent maxillary lateral incisor?
Signup and view all the answers
How does the root of the permanent maxillary lateral incisor taper?
How does the root of the permanent maxillary lateral incisor taper?
Signup and view all the answers
Where is the crest of contour distally located on the permanent maxillary lateral incisor?
Where is the crest of contour distally located on the permanent maxillary lateral incisor?
Signup and view all the answers
Which dimension does the maxillary lateral incisor exceed the maxillary central incisor?
Which dimension does the maxillary lateral incisor exceed the maxillary central incisor?
Signup and view all the answers
Which structure is not considered a border of the lingual fossa of a maxillary central incisor?
Which structure is not considered a border of the lingual fossa of a maxillary central incisor?
Signup and view all the answers
At what age is the root of the permanent maxillary central incisor typically complete?
At what age is the root of the permanent maxillary central incisor typically complete?
Signup and view all the answers
Which tooth is known for having a variant in form referred to as 'peg shaped'?
Which tooth is known for having a variant in form referred to as 'peg shaped'?
Signup and view all the answers
In the distal aspect of the maxillary lateral incisor, how does the crown appearance differ from the mesial aspect?
In the distal aspect of the maxillary lateral incisor, how does the crown appearance differ from the mesial aspect?
Signup and view all the answers
How does the incisal aspect of the maxillary lateral incisor compare to that of the central incisor?
How does the incisal aspect of the maxillary lateral incisor compare to that of the central incisor?
Signup and view all the answers
Which aspect of the maxillary lateral incisor is associated with the palatogingival developmental groove?
Which aspect of the maxillary lateral incisor is associated with the palatogingival developmental groove?
Signup and view all the answers
What is the characteristic of the mesiodistal dimension of the maxillary lateral incisor compared to the central incisor?
What is the characteristic of the mesiodistal dimension of the maxillary lateral incisor compared to the central incisor?
Signup and view all the answers
Study Notes
Permanent Maxillary Incisors
- The maxillary incisors are four in number, the central incisors are centered in the maxilla with mesial surfaces in contact.
- Maxillary and mandibular central incisors are the only teeth in the dental arches with mesial surfaces in contact.
- The maxillary lateral incisor is distal to the central incisor.
- The maxillary central incisor is larger than the lateral incisor.
- The incisors' primary function is to shear and cut food during mastication.
- Incisal ridges are found on incisors while cusps are found on canines and posterior teeth.
- The incisal ridge encompasses the entire incisal portion of the newly erupted tooth.
- The incisal edge is formed by the junction of the linguoincisal and labial surfaces due to occlusal wear.
Permanent Maxillary Central Incisor
- Calcification & Eruption: Calcification begins at 3-4 months, crown completion at 4-5 years, eruption at 7-8 years, and root completion at 9 years.
- Labial Aspect: The crown is trapezoidal with the shortest side cervically, cervicoincisal length is 10.5mm, mesiodistal diameter is 8.5mm, and mesiodistal diameter at the cervix is 7.0mm.
- Labial Aspect: The mesioincisal angle is sharp, while the distoincisal angle is rounded.
- Labial Aspect: The distal outline is more convex than the mesial outline. The crest of curvature for the mesial outline is at the incisal third.
- Labial Aspect: The crest of curvature for the distal outline is at the junction of the incisal and middle third. The incisal outline is usually straight and regular, with mamelons present on newly erupted teeth.
- Labial Aspect: The cervical outline curves towards the root and is part of a semicircle.
- Labial Aspect: The root is cone-shaped with a blunt apex located slightly distal to the center, with no developmental depressions.
Permanent Maxillary Lateral Incisor
- Calcification & Eruption: Calcification begins at 1 year, crown completion at 4-5 years, eruption at 8-9 years, and root completion at 11 years.
- The maxillary lateral incisor is smaller than the central incisor in all dimensions except root length.
- Some individuals may have peg-shaped lateral incisors or missing lateral incisors, leading to central incisor contact with the canine.
- The palatogingival groove may predispose to localized periodontal disease.
- Labial Aspect: The crown is trapezoidal with the shortest side cervically, with more outward curvature and rounded incisal angles.
- Labial Aspect: The mesial outline is similar to the central incisor but with a more rounded mesioincisal angle.
- Labial Aspect: The distal outline is rounded, with the mesial crest of curvature at the junction of the incisal and middle thirds, and the distal crest of curvature more cervical.
- Labial Aspect: The cervical line curves towards the root, but the curvature is greater than the central incisor.
- Labial Aspect: The root tapers to two-thirds of its length apically and then curves distally, ending in a pointed apex.
- Mesial Aspect: The root apex may have a labial curvature.
- Distal Aspect: Similar to the mesial aspect except the crown is thicker, the distal contact area is at the middle third, and the palatogingival groove may extend onto the root.
- Incisal Aspect: Similar to the central incisor but the labial crown is more convex, mesiodistal dimension is smaller than the labiolingual, and the incisal ridge and cingulum are more prominent.
Questions & Answers
- The permanent maxillary lateral incisor is smaller than the maxillary central incisor in all dimensions except root length.
- The labial edge is not a border of the lingual fossa of a maxillary central incisor.
- The root of the permanent maxillary central incisor is complete by 9 years.
- The tooth that has a variant in form known as being "peg shaped" is the maxillary lateral incisor.
- The surface that demonstrates the greatest curvature of the cervical line is #7 distal.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge on the structure and function of permanent maxillary incisors. This quiz covers details regarding the incisors, their calcification, eruption, and comparison between central and lateral incisors. Perfect for dental students and professionals looking to refresh their understanding.
