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what are the five functions of primary teeth?
what are primary teeth place holders for?
where are the primate spaces on the mandible?
between the primary canine and the 1st primary premolar
where is the primate space on the maxilla?
between primary canine and primary lateral
why is it important to educate the caregiver about the value of primary teeth?
to prevent premature tooth loss
prevent baby bottle mouth
what is baby bottle mouth
teeth are black ground down to gums
when should the 1st dental visit be fore a child
before 12 months- primary goal is to educate caregiver
what are three important things to know about primary dentition?
enamel and dentin thinner
pulp chambers larger
early aggressive periodontitis
where will bone loss be seen with early aggressive periodontitis?
around lower anterior incisors and mandibular 1st molars of primary and permanent dentition
what is a sign of early aggressive periodontitis?
why is it important to know that the pulp chambers are larger?
more pulp exposure with restorations and may need endo more
how many phases of arch development are there?
which teeth erupt in phase 1 of arch development?
eruption of permanent 1st molars
what two things are enhanced during phase 1 of arch development?
during phase 1 of arch development ______ ______ remain to allow for future perm teeth
which teeth are shed during phase 1 of arch development?
what teeth erupt during phase 2 of arch development?
permanent anterior teeth (centrals first then laterals
t/f the permanent location of anterior teeth is not established until the arch is fully developed?
when does phase 3 begin?
when the premolars erupt
what is the difference in size m-d between primary molars and perm premolars called?
what is the purpose of the leeway space?
allows for future movement of the molars
what is required to preserve the space if perm 2nd molars erupt prior to premolars or if a primary molar is lost prematurely?
when does phase 4 of arch development begin?
when canines wedge between lateral incisors and first premolars
what space helps for the eruption of the canines?
leeway space and primate space
when is the contact relation between teeth established?
what teeth erupt during phase 4 to support 1st molars during wedging process?
at the end of phase 4 the arch is complete from the _____ _____ forward
what is the final phase in arch development?
what does phase 5 consist of?
eruption of third molars
what stage can be missing from some peoples arch development?
_______ of the teeth contribute to the maintenance of the teeth within the dental arch.
what curve is produced by the curved alignment of all the teeth, the maxillary arch is convex and the mandibular arch is concave.
curve of spee
what is a concave curve that results when a frontal section is taken through each set of both maxillary and mandibular molars, firsts, seconds and thirds.
curve of wilson
what are three curvature functions?
preventing dental disease
dispersing occlusal trauma
what is the life expectancy associated with curvature functions?
the longer you have your teeth the longer your life will be
what two things are prevented by proximal contact areas
bacteria and debris build up
t/f the proximal contact area anchors teeth. preserves bone support.
proximal contact areas resist ______ ______
where are the contact points?
on the occlusal surface of the teeth, where the two arches come together
where is the contact on anterior teeth?
where is the contact on the posterior teeth?
middle third or more cervical
_____ _____ distal contact is at the center of the middle third
the _______ ______ goes from the buccal to lingual surface
where is the interdental space?
between and around roots
______ ______ is the supporting bone area
what are gingival or cervical embrasures?
interdental papilla is missing
where are the interdental papilla?
triangular shaped spaces between teeth
how are embrasures named?
based on the location relative to the contact area...buccal, lingual
what are the spaces between the teeth that are occlusal to the contact areas?
what are the purposes of embrasures (4)?
prevent food impaction
dissipate occlusal forces
how are embrasures self cleansing?
because they shunt food away
where is the curvature of the CEJ more curved and steep?
anterior maxillary teeth
t/f the curvature of the CEJ gets flatter on posterior teeth
t/f curvature of CEJ and cervical line are the the same thing?
what is the reason for the more curved and steep CEJ on maxillary anterior teeth?
attach to bone and gives them more support
what are the 5 self cleaning tendencies of teeth?
tongue and cheek
pits and fissures
how is enamel self cleaning?
smooth and slippery
how does the crown shape help with self cleaning?
how does the tooth shape for incisors, canines and premolars help with self cleaning
incisors-shovel push food off tooth
canines-spear to pierce and wedge
premolars-chewing surface one cusp spears and the other chews it
how is the tongue and cheek help with self cleansing?
move food around
how are pits and fissures self cleaning
where food goes and gets washed away with saliva
t/f food is softer now and we don't use our pits and fissures as much.
t/f if food is hard it grinds down the teeth
how does the curvatures help protect the periodontium? (4)
contours deflect food
prevents food impaction
promotes gingival stimulation
undercontoured tooth better than overcontoured tooth
why is a undercontoured tooth better than an overcontoured tooth?
cause gingival irritation (overhang) and will cause gum recession and bone loss
fundamental and preventive curvatures