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Questions and Answers
What is the shape of the marginal ridges?
What is the shape of the marginal ridges?
- Angular
- Triangular
- Square
- Rounded (correct)
On which surfaces of premolars and molars do marginal ridges form?
On which surfaces of premolars and molars do marginal ridges form?
- Mesial and distal (correct)
- Labial and palatal
- Occlusal and cervical
- Buccal and lingual
On which surfaces of incisors and canines do marginal ridges form?
On which surfaces of incisors and canines do marginal ridges form?
- Occlusal and cervical
- Lingual and palatal
- Mesial and distal (correct)
- Buccal and labial
What is the composition of marginal ridges?
What is the composition of marginal ridges?
Which teeth have marginal ridges on their lingual surfaces?
Which teeth have marginal ridges on their lingual surfaces?
What shape does the cingulum resemble?
What shape does the cingulum resemble?
Where does the cingulum encircle the lingual surface?
Where does the cingulum encircle the lingual surface?
What is the direction of the convexity of the cingulum?
What is the direction of the convexity of the cingulum?
What surface of the tooth does the cingulum encircle?
What surface of the tooth does the cingulum encircle?
At what third of the tooth does the cingulum resemble a girdle?
At what third of the tooth does the cingulum resemble a girdle?
What is the shape of the triangular fossa?
What is the shape of the triangular fossa?
What is the function of a sulcus in a tooth?
What is the function of a sulcus in a tooth?
What is the angle at which the inclines of a sulcus meet?
What is the angle at which the inclines of a sulcus meet?
What is the term for a depression or valley in the surface of a tooth?
What is the term for a depression or valley in the surface of a tooth?
What is the relationship between a sulcus and ridges and cusps?
What is the relationship between a sulcus and ridges and cusps?
What type of groove is the one that is not essential for development?
What type of groove is the one that is not essential for development?
What is located at the bottom of a developmental groove?
What is located at the bottom of a developmental groove?
What is the relationship between a developmental groove and a supplemental groove?
What is the relationship between a developmental groove and a supplemental groove?
What is NOT a type of groove?
What is NOT a type of groove?
What is the location of the supplemental groove relative to the developmental groove?
What is the location of the supplemental groove relative to the developmental groove?
What is the term used to describe a landmark in the central fossa of molars?
What is the term used to describe a landmark in the central fossa of molars?
What are the three rounded protuberances found on the incisal ridges of?
What are the three rounded protuberances found on the incisal ridges of?
What is the primary center of formation in the development of the crown?
What is the primary center of formation in the development of the crown?
Where are pits typically located?
Where are pits typically located?
What is the function of developmental grooves?
What is the function of developmental grooves?
Study Notes
Tooth Morphology
- The convexity of a tooth resembles a girdle that encircles the lingual surface at the cervical third.
- Cingulum is a characteristic feature of tooth morphology.
Tooth Margins
- Marginal ridges are rounded borders of the enamel that form the mesial and distal margins of:
- Occlusal surfaces of premolars and molars
- Lingual surfaces of incisors and canines
Fossae
- Central fossa is a depression in the surface of a tooth
- Triangular fossa is another type of depression in the surface of a tooth
Surface Features
- Sulcus is a long depression or valley in the surface of a tooth between ridges and cusps, with inclines that meet at an angle
- Developmental groove is a groove that forms during tooth development
- Supplemental groove is an additional groove that forms in the surface of a tooth
Pits
- Pit is a small pinpoint depression located at the junction of developmental grooves or at terminals of those grooves
- Examples of pits include:
- Central pit in the central fossa of molars where developmental grooves join
Tooth Development
- Mamelon is any one of the three rounded protuberances found on the incisal ridges of newly erupted incisor teeth
- Lobe is one of the primary centers of formation in the development of the crown
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Description
This quiz is about the characteristics of cingulum, a feature in dental anatomy. Cingulum resembles a girdle encircling the lingual surface at the cervical third.
