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7/27/2019 Feature of Smile on Teeth
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Feature of smile on teeth
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Smile is an expression denoting
pleasure, sociability, happiness, . A
bright, attractive smile creates a winning
first impression.
SMILE CLASSIFICATION
There are 2 types of smiles described in
the literature1- The forced smile, or social smile, is
voluntary, and perfectly reproducible.
2- The spontaneous smile, or
involuntary smile, cannot be reproducedbecause is activated by joy and involves
contraction of both the zygomatic major
muscle(which raises the corners of the
mouth) and the orbicularis oculi muscle
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Attractive smiles have various things in common, such as teeth that are white, unstained,
straight, evenly spaced with no gaps between them and not crowded or overlapping.
Here I have mentioned significant considerations for teeth that influence a person's smile
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A : Proportion of Maxillary incisorscrown located from a line between thelip commissure.
Ideally we have four maxillary incisors, twolarge Central incisors and 2 lateral whichappear in the smile zone. Youthful smilesreveal between 75% and 100% of theseteeth above the commissure line. Longteeth also equate to a younger-looking
smile. When this proportion becomes 40%or less, the smile appears to be aged sowith age, there is a decrease in maxillarytooth exposure during a smile, and anincrease in mandibular incisor exposure.This phenomenon occurs due to naturaltooth wear and the loss of elasticity of thelips.
As a general rule, males show less oftheir upper incisors and more of theirlowers than females.
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The incisal edge position
How long the maxillary central incisorsare sets the stage for the proportionsof the rest of the smile and smile line.
The smile line is a curve that passesthrough the incisal margins of themaxillary incisors and canines, making anarch.
When the incisal margins of themaxillary central incisors appearbelow the canine cusps, the smileline has a convex aspect that canharmonize with the lower lip line .The so-called reverse smile line
when the canine cusps appear moreocclusal than the maxillary centralincisor margin, creating a concaveaspect.
The literature says that the convex smileline aspect is more esthetic than theconcave smile line.
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B: GINGIVAL EXPOSURE
quantify of the gingiva that appears during a
smile.
Ideally " smile should not show more than
three millimetres of gums between the top
of your tooth and the bottom of your upper
lip.
The shape of the gums of the lower incisors
and the upper laterals should be a
symmetrical half-oval or half-circular shape.
The upper centrals and canines should show
a more oval shape.so The anterior gingival
margin symmetry is another important
esthetic aspect.
During a smile, maxillary central incisor
exposure varies from three quarters of
clinical crown to 2 mm of gingival exposure
Also the gums should be pink and healthy
which can be an indication of healthiness
and youth.
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excessive gum display is known as a
gummysmile,
while no gum display is sometimes calleda stiffupper lip!
Female characteristic smile, showing
some gingiva above maxillary centralincisors.
Male characteristic smile with maxillary
central incisor clinical crown partially
covered by upper lips, and showing more
mandibular incisor
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C :The smile arc
This is defined as the relationship of
the curvature made by the edges of
the upper teeth with the curvature of
the lower lip .
The ideal smile arc has the two curves
in a close parallel relationship with
each other.
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D: Negative space or buccal corridors
This is the small black space visible atthe corner of the mouth, , is the
space created between the buccalsurface of the posterior teeth andthe lip corners which is primarilydependant on the broadness of thesmile and the shape of the mouth.These spaces are present in all
smiles, however, too little or toomuch can have a significant effect onthe balance of a smile.
In the ideal smile, you should be ableto see the upper pre-molars on bothsides of the buccal corridors.
This negative space is affected by themaxillary arch width, the facialmuscles, the position of the buccalsurfaces of the posterior maxillary
teeth.
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E: Broadness of the smile Dental
arch form
A broad smile is determined by the
width of the maxillary arch - Thealveolar process of the maxillae holds
the upper teeth, and is referred to as
the maxillary arch -when your teeth
are in line they form a wide arched
shape- Some people have narrow orcollapsed arches, so when they smile
you cant see a lot of teeth.
So The broader the smile, the better!
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F: INCISAL FRAMES
it is the open space between theproximal surface of two adjacent
teeth in the same arch This space follows a pattern that
develops between the centralincisors and progresses laterally,.The size and volume of the incisalembrasures between teethincrease as the teeth move awayfrom the midline.
These silhouette patterns,created by the edges andseparations between the upper
front teeth against the darkerbackground of the mouth, helphaving an attractive smile.
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G: TOOTH CONTACTS AND
INCLINATIONS
In the frontal view, axial
inclinations of the anterior teeth
are slightly progressive as the
teeth are positioned posteriorly,
with the gingival portions of the
crowns more distal than the
incisal portions.
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Other significant considerations for teeth that influence a person's smile include:
Colour
Typically, the upper central incisors are the lightest and brightest teeth in your smile. The
upper side teeth are similar in colour to that of the central incisors, but generally slightlylower in brightness (value). The canines have greater saturation of colour. First and second
premolars are lighter and brighter than the canines, are similar in colour to that of the
lateral incisors.
Both Maxillary and mandibular set of teeth should look similar and complement to the hair,
skin and eye colour of person.
Lips
Midline
facial midline- a line between nasion and the philtrum- must coincide with the maxillary
and mandibular central incisor midline .It is more important for the upper midline to be
coincident with the facial midline, because this is more noticeable.
.
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Also I have to add that Perfect smiles start with protecting milky teeth
there are 20 deciduous teeth that erupt in the first few years of a childs life. The first teeth
to erupt are those at the front of the mouth; then, as the child gets older, their posterior
deciduous teeth begin to erupt. The final teeth to erupt are the most posterior deciduous
molars. All deciduous teeth will be lost, generally between the ages of 6 and 13. Thesequence of losing deciduous teeth is much the same as that of gaining them
Milky teeth act as space-savers for adult teeth. If they are lost early through decay, adult
teeth can drift. Because milky teeth have a thinner enamel than adult teeth, they decay
more easily so we should protect them by :
Setting up a good routine for dental hygiene, By the age of One should no longer be using a bottle
Reducing foods in high sugar and foods that stick to teeth
See the dental professional frequently