Feature of Smile on Teeth

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

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Feature of Smile on Teeth