Dental Anatomy: Tooth Morphology, Development, Curvatures, and Oral Cavity

Comprehensive practice flashcards in fill-in-the-blank style covering dental tooth numbering systems (Universal, FDI, Palmer), surface designations, line and point angles, root and crown landmarks, physiological curvatures, tooth tissues, development, eruption milestones, and anatomical structures of the oral cavity.

An adult dentition typically consists of $32$ permanent teeth, with __________ located on the maxillary arch and $16$ on the mandibular arch.

$$16\text{ teeth}$$

While each permanent quadrant contains premolars and molars, a primary (deciduous) quadrant contains __________.

NO premolars

In the division of the permanent dentition into sextants, Sextant 2 comprises teeth __________.

13-23

When orienting from the patient's perspective, Quadrant 3 corresponds to the __________ arch.

Mandibular left

Under the FDI two-digit numbering system, the first digit designates the quadrant and the second digit designates the __________.

tooth position

In the FDI numbering system for primary dentition, the first digit assigned to the mandibular left quadrant is __________.

$$7$$

In the Universal Numbering System for permanent teeth, numbering begins clockwise at tooth #1 on the maxillary right third molar and ends at tooth #32 on the __________.

permanent mandibular right third molar

The Universal Numbering System designates primary teeth using the letters __________.

A-T

In the Palmer notation system, each quadrant is demarcated by a bracket, and permanent teeth are numbered from $1$ to $8$ starting from the __________.

midline

The tooth surface that faces the cheek on posterior teeth is specifically termed the __________ surface.

buccal

On an individual tooth, the proximal surface oriented closest to the midline is the mesial surface, whereas the surface farthest from the midline is the __________ surface.

distal

A line angle is formed along the crown of a tooth where __________ surfaces meet.

TWO

Due to the absence of an occlusal table, anterior teeth possess $6$ line angles, whereas posterior teeth possess __________ line angles.

$$8$$

A point angle is defined as the specific junction where __________ tooth surfaces intersect.

THREE

On posterior teeth, the point angle formed by the meeting of the mesial, buccal, and occlusal surfaces is called the __________.

mesiobucco-occlusal point angle

The junction where the enamel-covered crown meets the cementum-covered root is known as the __________.

cementoenamel junction (CEJ)

The portion of a tooth that is visibly exposed above the gingiva in the oral cavity is designated as the __________.

clinical crown

Enamel is exceptionally resistant to wear because it is composed of __________ inorganic material and $4\%$ organic matter and water.

$$96\%$$

The tissue that comprises the primary bulk of the tooth and possesses the ability to regenerate and repair is __________.

Dentin

Unlike acellular cementum which covers most of the anatomic root, cellular cementum is restricted to the __________ of the root and can reproduce itself.

apical third

The bony socket within the alveolar process that houses the tooth root is called the __________.

alveolus

A small, pinpoint depression situated in the enamel, frequently located at the depth of a fossa or developmental groove, is termed a __________.

pit

The rounded, convex elevation situated on the cervical third of the lingual surface of anterior teeth is called the __________.

cingulum

An accessory elevation or tubercle located on the mesiolingual surface of a maxillary first molar is known as the __________.

Cusp of Carabelli

A contact area is the flattened region where adjacent proximal surfaces touch in the same arch, whereas a __________ is where the occlusal cusp touches an opposing tooth in the antagonist arch.

contact point

The triangular-shaped space cervical to the contact area of two adjacent teeth that is normally filled with interdental papilla is the __________.

interproximal space

A cervical (or gingival) embrasure forms when there is recession of the interdental papilla and __________.

bone

When viewed from the occlusal aspect, buccolingual embrasures are configured such that __________ embrasures are wider than facial embrasures.

lingual

The facial height of contour (crest of curvature) for both anterior and posterior teeth is located in the __________ of the crown.

cervical third

The lingual height of contour is located in the cervical third on anterior teeth, but on posterior teeth it is located in the __________.

middle third

As a general anatomical rule, the curvature of the cementoenamel junction is usually about __________ less on the distal surface than on the mesial surface.

$$1\text{ mm}$$

The periodontium consists of free gingiva, attached gingiva, alveolar mucosa, cementum, bone, and the __________.

periodontal ligament

Tooth buds or tooth germs initially begin developing during approximately the __________ of fetal life.

6th week

While primary teeth begin calcifying around the 4th to 5th month of fetal life, permanent teeth begin calcification around __________.

age 3–4 years

During the developmental maturation and calcification of a tooth, the __________ is the last portion to calcify.

root apex

The three rounded enamel projections found on the incisal ridges of newly erupted incisors that reflect developmental lobes are called __________.

mamelons

Permanent teeth such as incisors, canines, and premolars that replace deciduous predecessors are succedaneous, while permanent molars are termed __________.

nonsuccedaneous

The natural physical tendency of permanent molars to drift toward the midline within the arch during and after eruption is called __________.

mesial drift

The process by which primary teeth naturally lose anchorage due to osteoclastic root resorption and shed is called __________.

exfoliation

The first primary teeth to erupt into the oral cavity are typically the mandibular central incisors at approximately __________ of age.

$$8\text{ months}$$

According to typical permanent eruption schedules, the maxillary canine emerges between __________ of age.

$$11\text{--}12\text{ years}$$

The curved anatomical alignment of the occlusal plane that dips in the region of the first molars and rises toward the incisors and third molars is the __________.

Curve of Spee

The mixed dentition period commences around age $6$ when the __________ erupts into the oral cavity.

first permanent molar

The reddish transitional zone of the lips situated between dry keratinized facial skin and moist nonkeratinized oral mucosa is the __________.

vermilion zone

The vertical indentation located along the midline of the upper lip skin beneath the nose is known as the __________.

philtrum

The anatomical boundary that separates the movable, reddish alveolar mucosa from the bound, pale pink attached gingiva is the __________.

mucogingival junction

An overly firm or low-attaching maxillary labial frenum that extends over the alveolar crest can cause a separation between the central incisors known as a __________.

diastema

Yellowish, granular spots on oral mucosa resulting from misplaced sebaceous glands in $60\%$ to $80\%$ of the population are called __________.

Fordyce granules

Small asymptomatic bony outgrowths occurring on the buccal cortical plate of the mandible or maxilla are designated as __________.

exostoses

The transverse ridges of epithelial and connective tissue found on the anterior hard palate that assist in mastication and speech are the palatal __________.

rugae

A benign bony overgrowth occurring along the midline of the hard palate is clinically identified as a __________.

torus palatinus

The opening located beneath the incisive papilla on the anterior hard palate that transmits nasopalatine nerves and vessels is the __________.

incisive foramen

The anterior faucial pillar is formed by the palatoglossal muscle, whereas the posterior faucial pillar is formed by the __________.

palatopharyngeal arch

The palatine tonsils are situated laterally in the throat between the anterior and posterior __________.

tonsillar pillars

The four main types of lingual papillae found on the dorsal surface of the tongue are fungiform, foliate, circumvallate, and __________ papillae.

filiform

The small elevations located on either side of the lingual frenum where ducts of the submandibular and sublingual salivary glands empty are the __________.

sublingual caruncles

The floor of the mouth is supported like a muscular sling by the paired __________.

mylohyoid muscles

Exophytic bony enlargements situated bilaterally on the lingual aspect of the mandible near the premolar and canine area are termed __________.

mandibular tori