Set 1 Review Questions Flashcards
odontogenous begins at what week in utero
6th-7th week
root is longest on 2nd max molar
lingual (palatal) root
what does set traits mean
differentiates between primary and permanent
what are type traits
central incisors lateral incisors canines first premolar second premolar first molar second molar third molar
what are arch traits
maxillary and mandibular
what are class traits
incisors, canines, premolars, molars
which traits are used to differentitate between lateral and central incisors
type
what is found only on anterior teeth
cingulum
incisal edge
lingual fossa
mammelons
what identification is given in INS (ISO) for the tooth identified as #19 in universal system
permanent mandibular 1st molar
part of tooth cannot be observed during routine oral exmainations
clinical root
tooth characterized by a strong transverse ridge separating the mesial and distal triangular fossa
maxillary first premolar
last succedaneous teeth to erupt
maxillary canine
cervical cross section of a one rooted tooth wil reveal what basic shape
ovid or oval
largest and longest root of max molars
lingual (palatal) root
approximately when is completion of root formation in a permanent tooth
1 to 3 years after erruption
odontoblasts are responsible for formation of what
dentin
last enamel layer that becomes mineralized and is produced by ameloblasts is the what
primary cuticle
most common relationship of cementum to enamel
cementum overlaps the enamel
characteristic of ugly duckling stage in development of the dentition
(ugly duckling stage is the mixed dentition) temporary edentulated areas disproportionately sized teeth varying clinical crown heights crowding enlarged and edematous/inflamed gingiva different tooth colors
PDL located between what
cementum and alveolar bone and PDL space
Principle fibers of PDL receive majority of masticatory stress
Oblique fibers
Epithelium associated with border of lip
Keritinized stratified squamous epithelium
Most numerous papilla on tongue
Filiform
Infra hyoid muscles
Sternothyroid
Sternohyoid
Omihyoid
Thyrohyoid
Large opening for passage of spinal cord through occipital bone
Foramen magnum
_____ process consists of Zygoma, maxillary, and temporal bone
Zygomatic
Coronoid process exits for attachment if the _____ muscle
Temporalis
TMJ is a unique ______ joint because of its gliding and hinge movement
bilateral/dual
which muscle:
- originates on the pterygoid mandibular raphe
- pierced by stensons ducts
- inserts into orbicularis oris
buccinator mucscle
muscle serves as landmark to locate carotid, internal jugular, and cervical nodes
sternocleidomastoid muscle
taste sensation to anterior 3rd of tongue, travels on the 7th CN which branch
chorda tympani of facial
term best describes x-ray energy
photons
best describes most common type of radiation that is emitted from the anode of dental radiology machine tube head
bremsstrahlung
lead collimation restricts primary beam and extends the tube head to maximum diameter of
2.75in (7cm)
tissue makes up bulk of tooth
dentin
number of roots a tooth will develop determined by
hertwig’s epithelial root sheath
characteristics of permanent vs. primary teeth
pulp size
pulp cavity on primary teeth shows pulp chambers and pulp horns larger in proportion than permanent teeth (esp. mesial pulp horn)
characteristics of permanent vs. primary teeth
color
primary teeth whiter enamel than permanent b/c increased opacity of underlying dentin
characteristics of permanent vs. primary teeth
overall size
crown of primary tooth short in relation to total length
roots of primary teeth narrower and longer than crown teeth
crown to root ratio of primary teeth smaller than permanent crown to root ratio
dentin on primary teeth thinner than permanent
characteristics of permanent vs. primary teeth
mineralization of enamel
mineralization of primary teeth begins in utero at 13 to 16 weeks
what is primary crystalline material of bone
calcium hydroxyapatite
first mineralized tissue to appear in any developing tooth
dentin
derivative of ectoderm in oral cavity
oral epithelium
attachment apparatus originates from
dental sac
composition of normal enamel
96% inorganic material (or mineralized), 1% organic material, 3% water
last layer of enamel produced by ameloblasts before tooth eruption occurs
primary cuticle
permanent tooth most likely to exhibit cusp of carabelli
max first molar
permanent premolar usually exhibits bifurcated root
max first premolar
permanent premolar has functional buccal cusp and nonfunctional lingual cusp
mand first premolars
a whole body MPD to a 34 yo RDH on an annual basis is
MPD= (34-18)x5000mrem=80,000mrem?
what will be MPD if RDH (34yo) is pregnant
.5 milliseverts or?
body tissue most sensitive to radiation
rapidly dividing cells such as WBC, gametes or germ cells
body tissue least sensitive to radiation
specialized, like muscle or neural cells
factors can reduce radiation exposure to pt.
minimize exposure time use fast film maintain long source-object distance utilize proper added filtration utilize appropriate lead apron w/ thyroid collar use rectangular vs round collimation 16in PID open ended
main factor controls penetration of x-rays
kVp
radiograph intensifying screens used for
extraoral radiography
which PID or BID results in greatest reduction of radiation to pt
16in open ended rectangular PID; reduces by 70%
paralleling technique produces image with
minimal distortion
what type of bone loss describes reduction in height of intercrestal bone
horizontal bone loss- bone level parallel with CEJ
vertical bone loss- bone level @ angle to CEJ
percentage of kinetic energy inside vacuum tube actually converted to x-radiation
1%
other 99% is heat
what unit of radiation represents amount of radiation energy absorbed by tissue
gray (gy) or RAD
example of electromagnetic radiation
visible ultraviolet lights
x-rays and gamma rays
travels in wavemotion and has energies with different wavelengths
example of particulate radiation
alpha and beta particles
atomic nuclei
subatomic particles
example of microwave radiations
infrared rays
example of subatomic radiations
background radiation
muscle group innervated by 7th CN
muscles of facial expression
how many nerves innervated tongue
V3 lingual VII chorda tympani IX glossopharyngeal X vegus XII hypoglossal
tip of tongue burned; what nerve innervated
sensory V3 lingual
taste sour; what nerve
IX glossopharyngeal
taste sweet; what nerve
VII chorda tympani
taste bitter; what nerve
IX glossopharyngeal
taste salty
VII chorda tympani
pt having difficulty protruding tongue; what nerve affected
XII hypoglossal
bite tip of tongue, what nerve innervated
V3 lingual
how many arches contribute to development of tongue
1st 4 branchial arches
mandibular, hyoid, 3 and 4
most common type of cartilage
hyaline cartilage
what are enzymes that break down tissues in patient suffering from periodontal disease
hyaluronidase
site of steroid synthesis in cells
smooth ER (SER)
term for material that undergoes process to prepare material to be phagocytized
oposins
mA new time?
10
reduce exposure
kVp & film speed
pharynx nerves
IX and X
parotid
pure serous
pain from teeth from
trigeminal nerve
1st mineralized tooth structure
dentin
odontoblasts produce
dentin
osteoclasts occupy
howship lacunae
monocytes
macrophages
skeletal muscle cells
voluntary
myelination accomplishes
Shawn cells
enamel tufts
weakened
acellular cementum
cervical third
gingival attachment
sulcular epithelium and JE
gray matter
neuron bodies and synapse
groove from occlusal surface to facial surface except
max 1st molar
gracey 11/12
mesial surfaces of posterior teeth
buccal mucosa
not kertitinized
absorb long wave radiation
filter
electrons x-ray production
tungsten target
reduces operator exposure
distance
electron displaced from orbit
ionization
speed of electrons
kilivoltage
15 impulses=
1/4 second
electromagnetic radiation NOT
alpha and beta
x-ray photons
bremsstrhlung
what is posterior u-shaped radiopacity
zygoma
