4 - Natural Esthetics and Smile Design, Lab 4 (Setting Anteriors) Flashcards
when do you complete gothic arch tracer
same appointment as anterior try in
how do you measure width of anterior teeth
with flexible ruler, distal of canine to distal of canine
what tool can be used to select anterior teeth
Trubyte tooth selector
what shapes are ivoclar anterior teeth categorized as
square, tapering, and ovoid shapes
describe square tooth molds
- central incisor: dominant
- gingivo-incisal curve: moderate
- shape offers maximum light deflection and creates bold effect
describe tapering tooth molds
- rounded contour
- taper towards cervical ridge
- gingivo-incisal curvature: moderate
- large triangular incisor slightly triangular in shape
describe ovoid tooth molds
- gingivo-incisal curvature: pronounced
disperse light reflection to create softened appearance
“see with the ___, observe with the ___”
eye; mind
what affect dynesthetics? how many are there?
SPA: sex, personality, age
there are 17
difference between male and female teeth
male-rugged with square teeth & bold central incisors
female-pronounced curvatures, rounded point angles
what is the personality tooth?
maxillary lateral incisors (vary more in size, form, and position than any other tooth)
different in teeth based on age (young vs old)
Young-tapered, ovoid, rounded teeth
Older-square, sharp corners
describe delicate characteristics
~Rounded arch form
~Rounded corners
~Anteriors closely follow the lower lip
~Laterals overlap centrals
~Smaller laterals and cuspids
~Sharp Canines
describe rugged characteristics
~ Angular outlines
~Larger laterals and canines
~Square arch form
~Centrals overlap laterals
~Blunt canines
should teeth gradually lower OR rise along the occlusal plane? why?
RISE! to give the impression of distance
the buccal corridor is controlled by placement of what tooth?
canine
what is the principle function of maxillary anterior teeth?
esthetics
what is the secondary function of maxillary and mandibular anterior teeth
phonetics
the labial portion of CI is how many mm anterior to incisive papilla
8-10 mm
incisal length and width can be measured with what
alma gauge
what is the incisal display for the following lip lengths?
10-20mm
20-25mm
26-30mm
30 & over
10-20mm: 3-4mm
20-25mm: 2mm
26-30mm: 1mm
30 & over: 0
who shows less incisal display
older people
what produces the frigative sounds
upper teeth contact the wet-dry line of lower lip during speech productions of “f” and “v” sounds
produced by anterior teeth
what make “s” sounds
linguopalatal - made by contact between tip of tongue and palate of rugae area w/ small space for escape of air
what happens if “s” sound space is too small
whistle usually results and if the space is too broad and thin, the “s” sound is replaced by “sh” sound (a lisp)
describe the lateral incisor placement in males vs females
males: LINGUOversion
females: LABIOverision
arrangement considerations of mandibular anterior teeth
- Vertical overlap
- Horizontal overlap
- Antero-posterior inclination in proximal view
- Inclination of long axes
what is the Class 1 relationship
central incisors perpendicular to ridge
what is the Class 2 relationship
central incisors slightly palatally inclined
what is class 3 relationship
central incisors slightly labially inclined
is tilting of the centrals acceptable?
NO! esthetically unacceptable
describe what happens when maxillary centrals are rotated towards a distal flare
creates a highlight on center of tooth, giving a boldness to set up
is mesial flare on centrals esthetically acceptable?
NO!
can you characterize denture by altering neck position of centrals?
no because it will make one central look light and the other look dark (deflection neck out vs. reflection neck in)
what should length of max central incisor be
same length as wax rim
how to position lateral maxillary teeth for SOFT characteristic (labial palatal inclination, M-D inclination, rotation, length)
L-P: labial (neck in)
M-D: long axis of tooth inclined distally
Rotation: mesial flare
Length: 1-2 mm (At least 0.5 mm) than phonetic rim
how to position lateral maxillary teeth for BOLD characteristic (labial palatal inclination, M-D inclination, rotation, length)
L-P: perpendicular
M-D: none
Rotation: distal flare
Length: same length as phonetic rim
how should maxillary canines inclnie
palatal inclination (neck out)
how many degree distal inclination of max canine
15 degree (long axis of canine inclined toward distal)
should you do mesial or distal flare for max canine rotation
mesial flare
what tooth is always shorter then canine or central
lateral
what tooth is always longer than the premolar
canine
mandibular anterior teeth should maintain how much horizontal and vertical overlap?
1 mm horizontal
1 mm vertical
what is the purpose of drawing a blue line on the inside of the land area of casts? why?
teeth must not be set facial to this line because it will make the denture unstable
midline on lab project is drawn where? how is this different from real life appointment?
- midline matches buccal frenum
- midline in real life marked clinically during jaw relation records appointment
when placing the first tooth on max arch (#9) where should it be located
next to midline, at height of wax rim and width
what to use as reference for #8
parallel to #9, incisal edges of both teeth should touch flat plane, long axis of both teeth should be straight/parallel with each other
incisal edge of laterals are ___ more apical than central
0.5mm
long axis of laterals should be inclined [mesial or distal] compared to centrals
distally
maxillary canines should be even/level with what teeth
centrals
after placing maxillary teeth, what do you check
- pin and zero
- pin touches/holds articulating paper on incisal guide
- mx posterior wax rim still touching MD wax rim
where should you draw lines on mandibular cast/wax rim? what is this for
- center of mandibular ridge on both sides (mark at top of retromolar pad and near canine area)
- connect the line
- this is where MAXILLARY LINGUAL CUSPS will eventually go and central grooves of mandibular posterior teeth
lateral max should be angled mesial or distal
DISTAL
incisal edge of mand canine should be tipped how
distally
should all teeth sit flat with plane on mandibular
yes
