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Questions and Answers
What is the primary function of marginal ridges in teeth?
What is the primary function of marginal ridges in teeth?
- To provide additional support to the enamel
- To separate the occlusal and lingual surfaces of teeth (correct)
- To prevent excessive wear on the teeth during mastication
- To aid in the proper alignment of the dental arch
On which surfaces of incisors and canines are marginal ridges typically found?
On which surfaces of incisors and canines are marginal ridges typically found?
- Incisal and proximal surfaces
- Occlusal and cervical surfaces
- Buccal and labial surfaces
- Mesial and distal margins of the lingual surfaces (correct)
What is the shape of the marginal ridges that form the mesial and distal margins of the occlusal surfaces of premolars and molars?
What is the shape of the marginal ridges that form the mesial and distal margins of the occlusal surfaces of premolars and molars?
- Rectangular
- Triangular
- Rounded (correct)
- Angular
On which teeth are marginal ridges typically found?
On which teeth are marginal ridges typically found?
What is the anatomical component of teeth that marginal ridges are a part of?
What is the anatomical component of teeth that marginal ridges are a part of?
Where is the triangular fossa located on molars and premolars?
Where is the triangular fossa located on molars and premolars?
What is the relationship between the triangular fossa and the marginal ridges?
What is the relationship between the triangular fossa and the marginal ridges?
On which teeth is the triangular fossa found?
On which teeth is the triangular fossa found?
What is the function of the triangular fossa?
What is the function of the triangular fossa?
What is the significance of the triangular fossa in dental anatomy?
What is the significance of the triangular fossa in dental anatomy?
What is the term for a long depression or valley in the surface of a tooth between ridges and cusps?
What is the term for a long depression or valley in the surface of a tooth between ridges and cusps?
What is the shape of the triangular fossa?
What is the shape of the triangular fossa?
What is the characteristic of the inclines of a sulcus?
What is the characteristic of the inclines of a sulcus?
What is the term for a depression or valley on the surface of a tooth that is not triangular in shape?
What is the term for a depression or valley on the surface of a tooth that is not triangular in shape?
What is the relationship between the inclines of a sulcus and the ridges and cusps of a tooth?
What is the relationship between the inclines of a sulcus and the ridges and cusps of a tooth?
What is the primary function of a supplemental groove?
What is the primary function of a supplemental groove?
What is the relationship between a developmental groove and a pit?
What is the relationship between a developmental groove and a pit?
What is the main difference between a developmental groove and a supplemental groove?
What is the main difference between a developmental groove and a supplemental groove?
What can be inferred about the number 8 in the diagram?
What can be inferred about the number 8 in the diagram?
What is the overall purpose of the diagram?
What is the overall purpose of the diagram?
What is the orientation of the oblique ridge on the occlusal surfaces of maxillary molars?
What is the orientation of the oblique ridge on the occlusal surfaces of maxillary molars?
Which cusps contribute to the formation of the oblique ridge?
Which cusps contribute to the formation of the oblique ridge?
What is the name of the ridge that unites with the triangular ridge to form the oblique ridge?
What is the name of the ridge that unites with the triangular ridge to form the oblique ridge?
On which teeth can the oblique ridge be found?
On which teeth can the oblique ridge be found?
What is the location of the triangular ridge that contributes to the oblique ridge?
What is the location of the triangular ridge that contributes to the oblique ridge?
Study Notes
Tooth Anatomy
- Marginal ridges are rounded borders of enamel that form the mesial and distal margins of occlusal surfaces of premolars and molars, and the mesial and distal margins of lingual surfaces of incisors and canines.
Oblique Ridge
- The oblique ridge is a ridge that crosses the occlusal surfaces of maxillary molars obliquely.
- It is formed by the union of the triangular ridge of the distobuccal cusp and the distal cusp ridge of the mesiolingual cusp.
Fossae
- Triangular fossa is located on the occlusal surfaces of molars and premolars, mesial or distal to marginal ridges.
- Central fossa is a distinct feature on the occlusal surfaces of teeth.
Sulcus and Grooves
- A sulcus is a long depression or valley in the surface of a tooth between ridges and cusps, where the inclines meet at an angle.
- Developmental groove and supplemental groove are types of grooves found on teeth.
- A pit is a small depression on the surface of a tooth.
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Description
Learn about the rounded borders of enamel that form the margins of occlusal and lingual surfaces in different types of teeth. Understand the structure and function of marginal ridges in premolars, molars, incisors, and canines.
