Exam 3 Flashcards
A single cone is
haplodont
Three cusps in line
triconodont
three cusps in a triangle
tritubercular molar
four cusps in a quadrangle
quadritubercular molar
Haplodont animal example
alligator teeth
Haplodont is the simplest
form of a tooth, single cone
In Hapolodont, how do animals swallow?
whole
In hapolodont, there is no
occulsion of the teeth
Quadritubercular example
apes and humans
Quadritubercular what contacts?
4 cusps that have occlusal contacts between max and mand
What do lobes represent?
a primary center of formation
All teeth are a combination of
four or more lobes
Facial and lingual aspects are what shape?
trapezoids of various dimensions
In the facial and lingual aspects are trapezoids, the short side is the _________ and the long side is the _________
short side is the base of the crown (cerivical) and long side is the occlusal or working surfaces of crown.
The trapezoid shapes allows for
interproximal spaces with interproximal tissue, space between the roots that allow for sufficient bone, each tooth contacts an adjacent tooth which protects interproximal gingiva, and each tooth has two antagonist in opposite arch.
What teeth dont have two anatongists?
Mandibular centrals and Max 3rd molars
If a tooth is lost, this arrangement prevents
extrusions and stabilize remaining teeth
Mesial/Distal Anterior teeth have what type of shape?
triangular shape
Mesial/Distal Anterior teeth have a wide base for
strength
Mesial/Distal anterior teeth have a tapered
outline (labially and lingually) narrowing to a thin ridge (incisal edge) which facilitates food penetration
Mesial/Distal Maxillary Posterior teeth have a
trapezoid shape
On the mesial/distal maxillary posterior teeth the occlusal surfaces are more ______ which mean the tooth can
constricted; force into food more easily
If occlusal surface was as wide as base,
forces of mastication would multiply
Mesial/Distal Mandibular Posterior have a ______ shape
rhombodial
The rhombodial shape
inclines the crowns to the lingual
Primary function of teeth is
mastication (chewing) and digestion of food, speech, and personal appearance
Occlusion
when mandibular teeth come into contact with maxillary teeth
Buccal and lingual contours direct
food to and away from gingiva
Inadequate stimulation occurs if
contour is too great (over-contoured)
Over stimulation occurs if
contour is not enough (under-contoured)
Over-contoured/under-contoured _______ should be avoided if possible
restorations
Proximal contacts
area where two adjoining teeth make contact
Proximal contacts help
protect soft tissues
Proximal contacts the contact is
most occlusal/incisal boundary of interproximal space
Proximal contacts other boundaries are
alveolar bone at base and proximal surfaces of adjacent teeth
Gingival or interdental papilla
gingiva within the interproximal space
Cervicoenamel ridge/cervical ridge which corresponds to
height of contour
greatest area of contour (height of contour) as seen from facial or lingual
contact area
Overall root form or shape, size, and number related to
work of the tooth
Angle and position of ________ is important
incisal/occlusal
Occlusal and incisal surfaces of all crowns in either arch don’t
contact a flat plane
greatest area of contour (height of contour) as seen from the meisal/distal view is
the cervical ridge
Posterior tooth job
forces/chew
Anterior tooth job
tear
Cusp is within the confines of
root
Curve of Spee is looking from
buccal view
Curve of Wilson is looking from
front view
Because of curve of Wilson, buccal cusp tip are
larger
Curve of Spree and Curve of Wilson form the
Sphere of Monson
Dehiscence
is loss of alveolar bone on the facial (rarely lingual) aspect of a tooth that leaves a characteristic oval, root-exposed defect from the cementoenamel junction apically
Fenestration
is a “window” of bone loss on the facial or lingual aspect of a tooth that places the exposed root surface directly in contact with gingiva or alveolar mucosa.
Curve of Spee
anterior to posterior curve from tip of canines to molars
Curve of Wilson
mesiolateral curve of posterior teeth. Anterior roots include to lingual
Maxillary posterior roots (and mand 1st premolar) incline to lingual while Mand 2nd premolar and mand molars include to buccal (spee or wilson)
Wilson
Maxillary premolar incline to distal while max molars incline to mesial and mandibular posteriors incline to distal
Spee
What is the function of proper contact relation?
Stabilize arch, prevent food impaction, contributes to food flow pattern
