Key features

Question 1

What are the key features of an upper canine

Answer 1

• crown is a broad diamond shape
• distal border is longer and steeper with the distal point of contact being located in the middle of the crown
• mesial border is shorter and the mesial point of contact is more incisal than the distal
• strongest and longest root in human dentition

Question 2

what are the key features of a lower canine

Answer 2

• edges are much less flared than the uppers with the crown more symmetrical
• mesial border of the cusp is shorter and less steep than the distal border
• labial surface is lingually inclined
• curvature of cervical line more prominent on mesial surface than distal

Question 3

What are the key features of an upper central incisor

Answer 3

• palatal surface deeply concaved like a scoop
• mesio-incisal edge sharp and more right angled than distal which is more rounded
• curvature of cervical line more prominent on mesial surface than distal
• almost as wide as it is long
• may have mammelons

Question 4

what are the key features of an upper lateral incisor

Answer 4

• much more slender than central incisor
• palatal surface has 2 distinct marginal ridges which meet at the cervix, may form fossa which is susceptible to caries
• distal edge more rounded than mesio-incisal edge
• curvature of cervical line more prominent on mesial surface than distal

Question 5

What are the key features of a lower central incisor

Answer 5

• crown appears flat and almost symmetrical
• crown is lingually inclined
• curvature of cervical line more prominent on mesial surface than distal
• may have mammelons

Question 6

What are the key features of a lower lateral incisor

Answer 6

• crown flares/ is more fan like than a central
• mesial side slightly larger than distal
• mesio-incisal edge more right angled than distal which is rounded
• curvature of cervical line more prominent on mesial surface than dista

Question 7

What are the key features of an upper first pre molar

Answer 7

• buccal surface is much wider and slightly higher than palatal
• mesial surface is have convex/ half concave due to CANINE FOSSA
• majority have 2 roots
• developmental groove on mesial marginal ridge
• marked mesial displacement of the lingual cusp

Question 8

What are the key features of an upper second pre molar

Answer 8

• two cusps of similar height and width
• one root
• fissure does not meet either marginal ridge
• slight mesial displacement of lingual cusp
• distal marginal ridge is located more cervically than mesial

Question 9

What are the key features of a lower first pre molar

Answer 9

• Lingual surface much narrower and much lower than buccal
• buccal surface strongly lingually inclined
• mesial contact point is smaller than the broad distal contact point
• often a small groove from mesial pit to mesio-lingual surface
• medial marginal ridge more cervical than distal

Question 10

What are the key features of a lower second pre molar

Answer 10

• buccal cusp lingually inclined
• buccal and lingual cusps are similar heights
• lingual cusp is either mesially displaced or if there are 2 cusps the mesial is the largest
• distal marginal ridge is located more cervically than mesial

Question 11

What are the key features of an upper first molar

Answer 11

• 3 roots - 2 buccal one palatal
• deep fissure separating disto-palatal cusp which is the smallest
• mesio-palatal cusp is the biggest
• H shaped fissure
• diamond shaped occlusal surface
• TUBERCLE OF CARABELLI may be present on palatal surface of mesio-palatal cusp

Question 12

What are the key features of an upper second molar

Answer 12

• 3 roots - 2 buccal 1 palatal
• 4 cusps but may look like 3 as DISTO-PALATAL CUSP IS GREATLY REDUCED
• mesio-palatal cusp is largest

Question 13

What are the key features of a lower first molar

Answer 13

• only tooth with 5 CUSPS
• buccal side has 3 cusps with the distal being the smallest
• fissure running mesio distally that branches to run either side of ditto-buccal cusp
• 2 roots, one messiah one distal

Question 14

What are the key features of a lower second molar

Answer 14

• square shaped occlusal surface with cross shaped fissure
• mesio-buccal cusp is the largest
• lingual cusps are higher/ stand prouder/ straighter
• medial root broader than the distal root