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Marginal Ridge
Triangular Ridge
Transverse Ridge
Oblique Ridge
Labial Ridge
Buccal Ridge
Lingual Ridge
Cervical Ridge
Types of Ridges
Triangular Ridge
Descends/ inclines from the tip of the cusp towards the center or part of the occlusal surface.
Present only on premolars and molars.
Named according to the cusp and its location
Transverse Ridge
Present particularly on the occlusal surface of premolars and mandibular molars
Oblique Ridge
Present only on the occlusal surface of maxillary deciduous 2nd molar and all the permanent maxillary molars
Inclined Planes
The sloping are found between two cups ridges.
Valley
Fossa
An irregular depression or concavity on surface of tooth
Central Pit
Center of occlusal fossa where development grooves join
Lingual Fossa
Found on lingual surface of incisors and cuspids
Central Fossa
Depressions on center of occlusal surface of maxillary and mandibular molars
Sulcus
A long depression on the surface of a tooth between ridges and cusps the inclines of which meet at an angle
Groove
A shallow linear depression on the surface of a tooth
Developmental Groove
It usually separate lobes or major part of the tooth
Tubercle
Is a smaller elevation on some portion of the crown produced by an extra formation of enamel
Canine Eminence
Prominent on the labial surface of the root surface of the permanent maxillary surface
Developmental Depression
Long narrow linear depression on the long axis of the mesial and distal surfaces of the root of the tooth
Found during the development of the tooth
Facial Surface
Lingual Surface
Proximal Surface
Incisal or Occlusal Surface
Crowns of all teeth have 5 surfaces, namely...
Facial Surface
May be labial or buccal surface
Labial Surface
Surfaces of incisors and canines that are towards the lip
Buccal Surface
Surfaces of premolars and molars that are toward the face cheek
Lingual Surface (Palatal Surface)
Surfaces facing the tongue
Mesial Surface & Distal Surface
Two types of Proximal Surfaces
Mesial Surface
Surface towards the midline
Distal Surface
Surface away the midline
Incisal Edge
Occlusal Edge
Two types of Incisal or Occlusal Surface
Incisal Edge
The surface of incisors and canines that come in contact with those in the opposite jaws during the act of closure are called _____
Occlusal Surface
The surface of the premolars and molars that come in contact with those in opposite jaws during act of closure are called _____
Occlusal Table
Come in contact during mastication. Also known as Occlusal Surface.
Cusp
A pointed or rounded elevation or mound on the crown of a tooth.
Can be found on molars, premolars, cuspid, and bicuspid
Cusp
Peak
Present in occlusal
Chewing grinding
Mesial and Distal Cusp Slope
Inclined surfaces that from an angle at the tip of the two cusps
Mesial and Distal Cusp Slope
2 cusp slopes / cusp ridge slopes
Cingulum
Is the lingual lobe of an anterior tooth and makes up the bulk of the cervical third of the lingual surface.
Maxillary anterior & Permanent dentition
Cingulum is prominent to ______ teeth
Girdle or Belt
Other name of Cingulum in Latin
Lobe
Is one of the primary sections of formation in development of crown of a tooth
Cusps & Mamelons
Representative of lobes
Mamelons
Are three rounded protuberances found on incisal ridges of newly erupted incisor teeth
Mamelons
Small rounded protuberance/ projections
Prominent on edges of newly erupted permanent
incisors maxillary and mandibular
3 Facial / Labial
1 Palatal / Lingual
4 Lobes of anterior teeth
Mesial Lobe
Middle Lobe
Distal Lobe
Cingulum / Palatal Lobe
Name the 4 lobes of anterior teeth
Mesial Lobe
Largest lobe
Middle Lobe
Smallest lobe
Grooves
Separates the lobes in mamelons
In posterior teeth, the number of lobes is to the number of cusps
Ridge
A linear elevation on the surface of a tooth and is named according to its location and or form.
Marginal Ridges
Linear round borders of the enamel that form the mesial and distal margins of the occlusal surfaces of the posterior teeth or the lingual surfaces of the anterior teeth.
Can only be seen on the margins of the teeth
Transverse Ridge
Formed by the union of the buccal and lingual triangular ridges that crosses the surface of the posterior teeth in transverse direction
90
Transverse Ridge: about __ degrees to both the buccal and lingual surfaces
Oblique Ridge
Is formed by the union of triangular ridges of the mesio-lingual and distal ridge of distobuccal cusp in oblique direction
Oblique Ridge
Is a ridge crossing obliquely the occlusal surfaces of maxillary molars and formed by the union of the triangular ridge of the distobuccal cusp and the distal cusp ridge of the mesio-lingual cusp.
Labial Ridge
On the labial surface of the tooth that runs cervico-incisally almost at the center of the labial s.
Labial Ridge
Prominent labial ridge running from cusp tip to the cervical area
Buccal Ridge
Runs cervico-occlusally approximately at the center of the buccal surface
Lingual Ridge
Found on center of lingual surface of tooth which extends from cingulum to the cusp tip in the permanent canine and posterior teeth
Cervical Ridge, Neck of the teeth
Runs mesio-distally at the cervical third of the labial surface of the crown that is present particularly on the deciduous teeth and only on the permanent molars also known as ____
Mesial Cusp Ridge
Distal Cusp Ridge
Triangular Ridge
Buccal Ridge
Cusp ridge is made up of?
4
Cusp Ridge: Each cusp has ____ cusp ridge extending in different directions from its tip
Pit
A sharp pinpoint depression on the surface of enamel
Small Defect
Pit is sometimes called a ____ _____ on the enamel crown of tooth.
Buccal Pit
Central Pit
Lingual Pit
Examples of Pit
Buccal Pit
Terminal part of buccal developmental groove
Major Fossa
Central Fossa is considered as?
Minor Fossa
Triangular Fossa is considered as?
Triangular Fossa
Situated next to the distal and mesial marginal ridges (mesial triangular fossa and distal triangular fossa)
Developmental Groove
Is a short, shallow groove or line between the primary parts of the crown or root.
Supplemental Groove
Is less distinct and does not mark the junction of primary parts
Developmental Depression
Long and narrow linear depression on the long axis of the tooth found on the mesial and distal surfaces of the root of the tooth during the development of teeth.
Accidental Grooves
Grooves that are not supposedly there
Groove & Inclines
Can be seen in sulcus
Sulcus
Valley or long depression
Fissures
Sometimes can cause cavity
U
V
I
IK
Inverted Y
Types of Fissures
Fissures
Long narrow channel or cleft located at the depth formed during the development of the tooth
Eminence
Prominence or projection of a bone or enamel on a tooth surface
Part of the root that is very bulgy
Line
Two surfaces meet
Point
Three surfaces meet
6
Number of line angles of anterior teeth
8
Number of line angles of posterior teeth
4
Number of point angles of anterior and posterior teeth
Cervical third
Middle third
Incisal/occlusal third
Division of thirds occluso-gingiually
Medial third, middle third, distal third
Division of thirds mesio-distally (crown)
Labial third, middle third, lingual third
Division in thirds facio-lingually (crown)
Cervical third, middle third, apical third
Division in roots
Inclined plane
Sloping area found between two cusp ridges, each cusp exhibits four of these
Cusp ridge
Extending in a different direction from the cusp tip
Central groove
Also known as Lewis offset
Crest of curvature
Greatest convexity or bulge
Contact area
More broader and applicable on the posterior teeth
Contact point
Applicable on the anterior teeth
Diastema
An open space between two adjacent teeth
Interproximal space
The area between the teeth
Interdental papilla
A triangular fold of gingival tissue
Embrasure
Part of the interproximal space not occupied is called?
Central axis of tooth
Where the highest convexity can be found
Embrasure
Means " spillways “ / potential v-shaped space that surrounds the contactarea
Palatal / lingual embrasures
Largest among other embrasures because of the teeth is being designed or curved
Note 
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