UCLA BDP lectures Questions with Correct
Answers
main structures of tooth
- crown: seen above gums, covered by enamel
- cementoenamel junction: marks point betwen enamel and cementum (root)
- root: holds tooth in jaw, under/hidden in gums and bone
enamel
outermost layer, hardest substance in body
dentin
supports enamel and protects the pulp beneath enamel, weaker than enamel
cementum
layer covering root, keeps tooth stabilized in jaw
pulp chamber
beneath dentin layer, where pulp resides
root canal
natural chamber within root that houses pulp tissue
types of teeth
incisor, canine, premolar, molar
upper teeth key landmarks
1 & 16: 3rd molars, 3 & 14: 1st molars, 8 & 9 central incisors
,lower teeth key landmarks
17 & 32: 3rd molars, 19 & 30: 1st molars, 24 & 25: central incisors
anterior teeth
incisors and canines
posterior teeth
premolars and molars
4 quadrants of mouth
1: upper right, 2: upper left, 3: lower left, 4: lower right (r/l based on patient)
universal numbering system
most commonly used in the us
- permanent teeth: UR -> UL (1-16), LL -> LR (17-32)
- primary teeth: A-T
palmer notation
quadrant based, start from the midline (midline 2 teeth are 1)
federation dentaire international (FDI)
most common worldwide
2 digit system
- 1st digit = quadrant (1: UR, 2: UL, 3: LL, 4: LR)
- 2nd digit = tooth within quadrant (permanent: 1-8)
facial surface
Tooth surface closest to the face
, lingual surface
surface toward the tongue
proximal surface
surfaces between teeth (mesial -toward middle, distal - distant from middle)
incisal surface
biting surface of an anterior tooth
occlusal surface
surface of posterior teeth that comes in contact with opposing teeth (biting surface)
x-rays
form of electromagnetic energy that can pass through body to create images of teeth and bone
radiation for x-rays
as low as reasonably achievable (ALARA)
types of x-rays
full mouth, cone beam CT, panoramic, lateral cephalometric, bitewing, periapical, occlusal
full mouth series (FMX)
bitewings and periapical radiographs, taken upon 1st visit or every 3-5 years, in depth view of
patient's entire mouth
cone beam ct (CBCT)
provides a 3d image of the jaw and helps detect root anatomy/fractures when it is not visible
through other modalities, as needed, primarily endodontists and implants
Answers
main structures of tooth
- crown: seen above gums, covered by enamel
- cementoenamel junction: marks point betwen enamel and cementum (root)
- root: holds tooth in jaw, under/hidden in gums and bone
enamel
outermost layer, hardest substance in body
dentin
supports enamel and protects the pulp beneath enamel, weaker than enamel
cementum
layer covering root, keeps tooth stabilized in jaw
pulp chamber
beneath dentin layer, where pulp resides
root canal
natural chamber within root that houses pulp tissue
types of teeth
incisor, canine, premolar, molar
upper teeth key landmarks
1 & 16: 3rd molars, 3 & 14: 1st molars, 8 & 9 central incisors
,lower teeth key landmarks
17 & 32: 3rd molars, 19 & 30: 1st molars, 24 & 25: central incisors
anterior teeth
incisors and canines
posterior teeth
premolars and molars
4 quadrants of mouth
1: upper right, 2: upper left, 3: lower left, 4: lower right (r/l based on patient)
universal numbering system
most commonly used in the us
- permanent teeth: UR -> UL (1-16), LL -> LR (17-32)
- primary teeth: A-T
palmer notation
quadrant based, start from the midline (midline 2 teeth are 1)
federation dentaire international (FDI)
most common worldwide
2 digit system
- 1st digit = quadrant (1: UR, 2: UL, 3: LL, 4: LR)
- 2nd digit = tooth within quadrant (permanent: 1-8)
facial surface
Tooth surface closest to the face
, lingual surface
surface toward the tongue
proximal surface
surfaces between teeth (mesial -toward middle, distal - distant from middle)
incisal surface
biting surface of an anterior tooth
occlusal surface
surface of posterior teeth that comes in contact with opposing teeth (biting surface)
x-rays
form of electromagnetic energy that can pass through body to create images of teeth and bone
radiation for x-rays
as low as reasonably achievable (ALARA)
types of x-rays
full mouth, cone beam CT, panoramic, lateral cephalometric, bitewing, periapical, occlusal
full mouth series (FMX)
bitewings and periapical radiographs, taken upon 1st visit or every 3-5 years, in depth view of
patient's entire mouth
cone beam ct (CBCT)
provides a 3d image of the jaw and helps detect root anatomy/fractures when it is not visible
through other modalities, as needed, primarily endodontists and implants
