Dental Anatomy Flashcards

Flashcards about Permanent Anterior Teeth Properties

What types of teeth are included in permanent anteriors?

Incisors and canines

How many developmental lobes do anteriors develop from?

Four

What are the names of the three labial developmental lobes?

Mesiolabial, middle labial, and distolabial

What are the two vertical labial developmental depressions that outline the separations between the labial developmental lobes?

Mesiolabial and distolabial

Are all permanent anteriors succedaneous or non-succedaneous?

Succedaneous

What is the masticatory surface of an anterior tooth also known as?

Incisal ridge

When viewed proximally, what is the crown outline of anteriors?

Triangular

Where is the height of contour located on anteriors for both labial and lingual surfaces?

Cervical third

Where are the contact areas of anteriors usually centered?

Labio-lingually on their proximal surfaces

Is the CEJ curvature of all anteriors less or greater than that of posteriors?

Greater

What is the raised rounded area on the cervical third of the lingual surfaces of all anteriors called?

Cingulum

What structure corresponds to the lingual developmental lobe?

Cingulum

What are the rounded raised borders that border the lingual surface mesially and distally?

Marginal ridges

What is the shallow and wide depression found on some anteriors' lingual surfaces called?

Fossa

What is the sharp deep V-shaped linear depression marking the junction between developmental lobes?

Developmental groove (primary groove)

What is the shallower and more irregular linear depression that may also be present on anteriors?

Supplemental groove (secondary groove)

Do anteriors usually have a single root or multiple roots?

Single root

What is the general inclination of maxillary anterior roots?

Great lingual and slight distal inclination

What is the range of angulation for mandibular anterior roots?

Almost vertical to strong lingual inclination

What can lip overhang cause with anterior teeth?

Difficulty maintaining homecare, leading to neglect of the cervical area and labial gingival tissue

What can mouth breathing cause with anterior teeth?

Dry the maxillary labial gingival tissue, causing localized inflammation

What is one use of Golden Proportions?

Restoring anteriors or undergoing orthodontic therapy

What is the ideal reference line?

1 to 3 millimeters (mm) parallel or equidistant to the lower lip line

What are mamelons?

Rounded enamel extensions on the incisal ridge

How are mamelons formed?

Extensions from the three labial developmental lobes

What is the key characteristic of Hutchinson incisors?

Screwdriver-shaped crown, wider cervically and narrower incisally, with a notched incisal ridge

Are lingual surface features more pronounced in maxillary or mandibular incisors?

Maxillary incisors

Where are proximal surfaces of maxillary incisors more accessible from?

Lingual

Eruption age and root completion of permanent maxillary central incisors?

Erupt between 7 and 8 years of age, with root completion at age 10

What is most noticeable about the permanent maxillary central incisors?

Large size and anterior, central arch position

How does the CEJ curve in the labial surface of a maxillary central incisor?

More curvature to the distal

What is significant about the mesial CEJ curvature of maxillary central incisors?

The mesial curvature is the greatest depth of curvature of any tooth surface in the permanent dentition

What is digital smile design?

The appearance of a patient's smile begins with the maxillary central incisors

What is a mesiodens?

A supernumerary tooth, can exist between the two maxillary central incisors, affecting spacing in the maxillary arch.

Eruption age and root completion age of permanent maxillary lateral incisors?

Erupt between 8 and 9 years of age, with root completion at age 11

Shape of a maxillary lateral incisor?

Conical, almost smooth and straight, but may curve slightly to the distal

Pulp cavity of a lateral incisor?

Has a simple form with a single pulp canal and a pulp chamber

A variation that can occur with a lateral incisor?

Peg laterals or partial anodontia

Where is the incisal ridge in relation to the long axis of the root on mandibular incisors?

just lingual to the long axis of the root

Eruption age and root completion age of a permanent mandibular central incisor?

Erupt between 6 and 7 years of age; root completion at age 9

What is unique about mandibular central incisors?

Smallest and simplest teeth in the permanent dentition and smaller than the lateral incisors

Eruption age and root completion age for mandibular lateral incisors?

Erupt between 7 and 8 years of age; root completion at age 10

Describe the appearance of mandibular lateral incisors?

Crown appears tilted or twisted distally

What is significant about canines?

Cornerstones of the dental arch because of their arch position, tooth form, tooth length, and overall function.

Maxillary Canine Features

Longest tooth in arch, More pronounced lingual surface with sharp cusp tip, Less pronounced lingual surface with less sharp cusp tip

Universal numbers for maxillary canine?

6 and #11

Universal numbers for mandibular canine?

22 and #27

International numbers for maxillary canine?

13 and #23

International numbers for mandibular canines?

33 and #43

Eruption and Completion age of maxillary canines?

Erupt between 11 and 12 years of age with root completion between ages 13 and 15

describe the crown relative to the root for the maxillary canine?

may be somewhat shorter than root and may resemble the mandibular canine.

Distinguishing the maxillary right canine from the left?

The distal outline is shorter than the mesial outline and usually has a depression between the distal contact area and the CEJ

Clinical Considerations for maxillary canines?

May erupt labially or lingually to the surrounding teeth; impaction; cyst formation; resorption of the adjacent teeth

Eruption and Root Completion Age for mandibular canines?

Erupt between 9 and 10 years of age with root completion between ages 12 and 14

Describe the root of a mandibular canine?

The single root of a mandibular canine may be as long as that of a maxillary canine but is usually somewhat shorter

How to distinguish the mandibular right canine from the left?

The distal outline is shorter and rounder than the mesial outline, similar to that of a maxillary canine

Terminology

Lingual: tongue; Labial: lips; Incisal: cutting edge of anteriors; Mesial:toward the midline; Distal: away from the midline; Cingulum: bulge on the lingual