characterization art of camouflage

7/27/2019 Characterization Art of Camouflage

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CHARACTERIZATION THE

ART OF CAMOUFLAGE

Dr Vikas Aggarwal

Deptt. of Prosthodontics Crown and Bridge


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No matters how ideal or perfect is you r restorat ion i f i t

doesn 't b lends wi th the surround ing hard and sof tt issue, the con cepts o f esthet ics are jeopardized


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What is Characterization

To produce a life like restoration characterization is

necessary

As defined by G.P.T 8

It is to al ter by app l icat ion of unique markings ,

indentat ions, colorat ion and sim i lar custom means of

del ineat ion on a tooth o r dental pros thesis thus

enhancing natural appearance


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Characterization in RemovableProsthesisCharacterization is a procedure in which the character or

collective qualities of a person are introduced in the

complete denture, either by modification of teeth or

denture bases, to make it appear more natural for thatparticular person.

Characterization of the complete dentures is necessary

to give the dentures a life like appearance, to make it

appear more natural


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Indications for Characterization

A life like restoration can be obtained by simulating the

anatomical characteristics of oral mucosa with various

stains.

It is of particular value in

1. Subjects with act ive upper l ip

2. Persons w ith prom inent pre maxil la

3. Persons l ik e teachers & singers

4. Who expose mo re of denture base dur ing talk ingand sm i ling.

5. Young edentulous pat ients


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Methods of Characterization

It can be done by two methods

1. Characterization by selection, arrangement and

modification of artificial teeth.2. Characterization of denture bases.


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Various ways of characterization

Martonestated that, The key to esthetics lies in asymmetry.1. Varying long axis of tooth

2. Creating asymmetry

3. Dissimilarities in rotation, inclinations

4. Using eccentric midline

5. Gingival recession

6. Grinding of incisal edges

7. Spacing and diastema

8. Restoration ,silver fillings


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Creating asymmetry

long axes of teeth become

accentuated with age.


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Creating rotations overlaps

broader curve of smiling lineindicates an older dental

composition.


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creating midline

shifts


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The progressive abrasion of

the artificial tooth as the age

of the patient progresses.

The cut made for normal

abrasion to remove the

artificial appearance of the

incisal edge.

A pos ter ior diator ic tooth

to be modi f ied to simulate

erosion.


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Spacing and diastema


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Characterization Of Denture Base

Natural appearance of denture can be enhanced

by:

An esthetic wax up which reproduces the

contours of the normal anatomy

Staining these contours to give them a vital

appearance


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Carving

Esthetic gingival marginsshould be created.

More facial tooth structure isexposed in aged patients to

represent the normal physiologicgingival recession.

The interdental papillae are leftlong and pointed for youngpatients and short and blunt for

older patients Variations in levels of contact

point will guide the height of thegum line of each tooth


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Root carving Minor root eminences are left over the

root areas of the incisor.

Heavy root eminences are formed over

the cuspid roots

Continuous alveolar bulk or minor root

contours formed in posterior region

Frenula Wax labial frenum (between central

incisors) and buccal frenula (between I

and II premolar) is placed with wax

spatula. Labial frenum is usually narrow and

thin at the margin whereas buccal

frenum is broad thick or fan shaped


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Stippling The surface of natural attached gingiva shows

stippling effect.

Creation of minute pore-like depressionson the attached gingiva portion of denturebase to create this orange peel appearanceis known as stippling.

Scalloping should be over accentuatedaccording to the age of the patient

Positive stippling & negative stippling.Positive stippling is achieved by blow-waxtechnique while negative stippling is done by

making pores in the wax pattern using a toothbrush.

The result of positive stippling is more naturallooking which seems to collect less debris andcalculus, and is easier to clean than theindentations made by negative stipplingtechniques.


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Tinting and staining

Staining of denture base depends on Thickness and density of the soft tissue.

Extent of vascularity within the tissue

Cellular components of the tissue.

Colour and hue may vary in one area from another


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Deep red are found in

mucobuccal fold, frenula,

soft palate, incisive papilla,

interdental papillae and the

larger rugae.

Pale yellow- in root

eminences and the hard

palate

Neutral Pink which fall

between extremes of deep

and pale colour tones,

facially between rooteminences


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1. Basic pink used over hard

tissue as attached gingiva (H)

2. Light red used for papilla and

muscle attachment (A)

3. Medium red used sparingly

(F)

4. Purple & Brown is used in

heavily pigmented gingiva (E)(B)

Map diagram for staining denture base


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BROWN MATRIX WITH ISOLATED AREAS OF

PIGMENTATION GINGIVAL HALO DEPICTED AROUNDTHE

NECK

BLUISH PINK DENTURE BASE WITH MELANINPIGMENTATION OF ALVEOLAR MUCOSA

BROWNISH PINK TEXTURED BASE WITH DARK

PIGMENTATION OF ATTACHED GINGIVA

&INTER DENTAL PAPPILA


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Techniques

Kayon denture staining kit

Pound technique (1951)

Here, stains are applied on thestone investment surfaces beforeany packing is done. Since one

has to work from the denturesurface inward, all stains must beapplied in reverse order, the onerepresenting the outer surfacebeing applied first.

Kemnitzer Technique (1956)

An important variation from Poundprocedure is incorporated inpacking the flask. Here staining isdone after packing ie during trialclosure


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See the difference yourself !!

Life less appearance Life like appearance


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A very well characterized mandibular denture


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Characterization in fixed prosthesis

Characterization is the art of reproducing natural defects,

and it can be particularly successful in making a crown

blend with the adjacent natural teeth.

In general, defects should be reproduced to a slightlylesser extent on the restoration than as they appear on

the natural teeth. The temptation to overcharacterize is

strong but must be resisted.

Characterization looks slightly more natural and is more

permanent if applied intrinsically during the build up of the

restoration


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Various characterizations

Hypocalcified areas produced withwhite stains easiest of all

White stain is used to mimic hypocalcified area


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Proximal coloration

By reproducing this in the

restoration, the dentist is

able to create the

illusion of depth and

separation

Able to tone down

excessive opacity at the

cervical area.

The stains used arebrown and orange


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Incisal halo

More common on the incisors of

younger patients.

A mixture ofwhite and yellow stains

in the ratio of4 : 1 is placed in the

linguoincisal area,


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Enamel cracks

A linear vertical crack interrupts the

light transmission across the tooth

surface, causing a shadow.

Thus, both the highlight and the

shadow of the crack must be simulated

for an authentic result.

The highlight is developed with whiteand yellow mixed in the ratio of 4 : 1,

and gray stain is used for the shadow.

Stained crack line

Cracked enamel stains quickly on

natural teeth. An orange-brown mixture applied in

as thin a line as possible will

effectively simulate a crack.


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Mamelons can be accentuated in

young adults

Cervical abrasions and gingival

recession can be depicted


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Special illusions

An FDP pontic may be very

long because of loss of

supporting bone.

Simulating a root surface can

partially improve the

appearance.

The root extension is contoured

for length and width, and thenan orange-brown mixture is

placed over the extension.


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Conclusion

Small subtle changes can create large differences in

esthetic outcome of treatment

It is very well said beauty lies in the eye of beholder


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Thank you

characterization art of camouflage

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