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Dental Assisting: Tooth Morphology Part 1
This deck covers key concepts in tooth morphology, including dental arches, dentition periods, and tooth anatomy. It is designed to help students understand the structure and function of different types of teeth.
Morphology
The study of the form of an organ or body part
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Key Terms
Term
Definition
Morphology
The study of the form of an organ or body part
Tooth morphology
Study of the size, shape, form and structure of the teeth
How many dental arches do we have?
2
What are the two dental arches
Maxillary and mandibular
Occlusion is when?
The teeth in both arches are in contact
Dentition refers to
The arrangement of the teeth as a set; the natural teeth in the dental arch
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| Term | Definition |
|---|---|
Morphology | The study of the form of an organ or body part |
Tooth morphology | Study of the size, shape, form and structure of the teeth |
How many dental arches do we have? | 2 |
What are the two dental arches | Maxillary and mandibular |
Occlusion is when? | The teeth in both arches are in contact |
Dentition refers to | The arrangement of the teeth as a set; the natural teeth in the dental arch |
Primary dentition | Baby teeth |
Permanent dentition | Adult teeth |
How many dentition periods? | 3 |
What are the 3 dentition periods? | Primary, mixed, permanent |
Primary (deciduous) dentition | Assists with speech, provides chewing surfaces to strengthen muscles of mastication - important for guiding permanent teeth into proper position |
Premature loss of primary teeth can lead to problems in | Alignment, spacing and occlusion of permanent dentition |
In primary dentition there is a total of how many teeth and when does it occur ? | 20 teeth. Occurs between 6 months and 6 years of age |
Mixed dentition | Occurs between 6 and 12 years when primary teeth are exfoliating and permanent teeth are erupting |
Succedaneous teeth | Permanent teeth that replace deciduous teeth |
How many teeth in the permanent dentition | 32 |
Anterior teeth | Incisors and canines (cuspids) |
Posterior teeth | Premolars (bicuspids) and molars |
Each arch can be divided into 2 what? | Sextants |
Sextants are | 1/6th of the dentition |
Sextants divided | into maxillary right and left (posterior and anterior) Mandibular right and left (posterior and anterior) |
Mandibular right and left (posterior and anterior) | Quadrants make up |
Quadrants make up | 1/4 of the dentition |
Mesial | Toward midline |
Distal | Away from midline |
Lingual | Inside, toward tongue |
Labial | Outside toward lips |
Incisal | Biting or cutting edge |
Buccal | Outside, toward cheeks |
Occlusal | Grinding or chewing surface |
Major elevation on the masticatory surfaces of the canines and posterior teeth | Cusp |
Fossa | Wide shallow depression on the lingual surfaces of anterior teeth and occlusal surfaces of posterior teeth |
Raised, rounded area on the cervical third of the lingual surface. | Cingulum |
Ridge | Thin elongated surface |
Mamelon | Rounded enamel extensions on the incisal edge of newly erupted incisors |
The 5th supplemental cusp found lingual to the mesiolingual cusp | Cusp of carabelli |
Central groove | Most prominent groove on posterior teeth |
Function of the incisor | Cut food without heavy force |
Canines | Cutting and tearing of food with force |
Premolars | Grasping, tearing, grinding |
Molars | Chew and grind food |