Dental Anatomy and Occlusion

Anterior tooth placement gives which sounds?

F and V sounds

TRUE or FALSE

A function of incisors is chewing

FALSE

Answer: Cutting and incising

Which sounds do the human dentition assist with?

- S sounds

- F sounds

- V sounds

Functions of the Human Dentition

1. Helps in _____

2. Aids in _____ and _____

3. Gives _____ and _____ to the face

4. Helps in giving facial _____

5. Like in animals, it may be used for _____ and _____

1. mastication

2. articulation, speech

3. shape, beauty

4. expressions

5. self-protection, attack

What are the type of dentitions?

Primary and Permanent

TRUE or FALSE

Premolar is found in Primary dentitions

FALSE

Answer: Found only in the Permanent dentition

Which process the longest root and are located at the corners of the dental arch?

Canines

What are important guides in occlusion due to their anchorage and position in the dental arches?

Canines

What is for seizing, piercing, tearing and cutting of food?

Canines

What tear and also grind?

Premolars

Premolars are _____ to canines, _____ to molars

distal, mesial

What dentition is first to contribute in maintaining Vertical Dimension to the face?

Premolars

Which completes the smile by eliminating dark corners?

Premolars

Which teeth contribute to vertical dimension?

Premolar and molars

What are large multicusped?

Molars

What function in crushing, grinding, and chewing?

Molars

What are V-shaped valleys between adjacent teeth?

Embrasures

Embrasures aids in?

Self-cleaning

What are the 4 types of Embrasures?

- facial or buccal

- lingual

- incisal or occlusal

- gingival

Class I Occlusion

Maxillary and Mandibular on same arch

Class II Occlusion

Maxillary arch is forward

Class III Occlusion

Maxillary arch is backward

Human teeth are divided into classes on the basis of what two features?

Form and function

What are the classes of teeth found in primary dentitions?

Incisor, canine, and molar

What are the classes of teeth found in permanent dentitions?

Incisor, canine, premolar, molar

What are the two types of human teeth?

Primary and secondary

The teeth serve four main functions:

1. Mastication

2. Esthetics

3. Speech

4. Protection of supporting tissues

What is the vermilion border of the lips?

Transition from highly keratinized external skin to less keratinized internal skin.

How are F and V sounds produced?

The upper lip contacts the wet-dry line of the lower lip.

The protective form of tooth function applies to what two things?

1. Contiguous investing tissues

2. Pulp

Where are incisors located?

Entrance to the oral cavity

How many incisors are there per quadrant?

Two incisors

Human incisors are responsible for:

Cutting and incising

How many incisors are there per arch?

Four

What are facial features of the maxillary central incisor? Incisal edge, cervical line, mesial outline, distal outline.

1. Incisal edge: nearly straight

2. Cervical line: gracefully curved

3. Mesial outline: straight

4. Distal outline: Rounded

What are three features of the lingual aspect of the maxillary central incisor?

1. Mesial and distal marginal ridges

2. Incisal edge

3. Prominent cingulum

What shape do the mesial and distal aspect of the proximal view of maxillary central incisor have?

Distinctive triangular outline

The incisal ridge of the crown of the maxillary central incisor is aligned on the _____________ axis of the tooth.

Long

The incisal crown of the maxillary central incisor is what shape?

Triangular

Where is the mesial contact point for maxillary central incisors?

At the incisal

Where is the distal contact point for maxillary central incisors?

junction of the incisal third and the middle third

What are facial features of the mandibular central incisor? Incisal edge, cervical line, mesial outline, distal outline.

1. Incisal edge: straight

2. Mesial outline: It descends apically from a sharp mesial angle

3. Distal outline: It descends apically from a sharp distal angle

What is the difference between the lingual surface of the maxillary and mandibular central incisor in regards to marginal ridges and cingulum?

No definite marginal ridges and small cingulum in mandibular central incisors.

What shape do the mesial and distal aspect of the proximal view of mandibular central incisor have?

Triangular outline

The incisal edge of the mandibular central incisor is perpendicular to what line?

Line passing labiolingually through the tooth.

What are the three esthetic functions of the incisor?

1. Smile

2. Lip support

3. Facial harmony

What tooth has the longest root?

maxillary canine

What is the function of the canine?

Tearing food

From a proximal view, what is the shape of a canine's crown?

Triangular

Why are canines good candidates for abutment teeth?

They have a stocky crown and a long root.

What teeth acts as a guide during occlusion?

Canine

What are the lingual features of the maxillary canine? Ridges (mesial, distal, lingual) and cingulum

1. Distinct mesial and distal marginal ridges

2. Well-developed cingulum

3.Prominent lingual ridge that divides the lingual surface into mesial and distal fossae.

How do maxillary and mandibular canines differ in regards to lingual features?

Mandibular canines have less defined lingual features.

Where are canines located?

At the corners of the dental arch.

What are the two esthetic functions of the canine?

1. Lip support

2. Turn the corner

What are the two functions of the premolars?

1. Tearing and grinding food

2. Maintain vertical dimension

What features of the premolar permit their function?

1. Facial cusp resemble canines

2. Lingual cusps have a rounded anatomic form

Where are premolars located?

Distal to canines and mesial to molars.

What is the esthetic function of premolars?

complete smile by eliminating dark corners.

What are the functions of molars?

1. mastication

2. maintain proper vertical dimensions of face

What are embrasures?

The V-shaped valleys between adjacent teeth.

What is the function of embrasures?

Spillway for food to escape during chewing, facilitating the self cleansing process.

What are the four types of embrasures?

1. Facial

2. Lingual

3. Incisal

4. Gingival

What is a class I occlusion?

normal occlusion

What is a class II occlusion?

Mesial buccal cusp of maxillary first molar is mesial to the buccal groove of the mandibular first molar

What is a class III occlusion?

MB cusp of the max first molar occludes posteriorly to the buccal fissure of lower first molar, or even in the embrasure between first and second molars