shade guides shade tabs - each shade guide consists of multiple shade tabs

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Shade guides • Shade tabs - Each shade guide consists of multiple shade tabs

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Page 1: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Shade guides• Shade tabs

- Each shade guide consists of multiple shade tabs

Page 2: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Vita Lumin VacuumStep 1: Hue matching

- Four grouping of hue,

A1-A4 Reddish-BrownishB1-B4 Reddish-YellowishC1-C4 Grayish shadesD2-D4 Reddish-gray

- Match the samples with high chroma with cervical area of canines

Page 3: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Vita Lumin VacuumStep 2: Chroma selection

- Once the hue has been accomplished, a choice is made for the best chroma

- For instance B is the best hue match then it has four different chroma: B1, B2, B3, B4, of the same hue

Page 4: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Vita Lumin VacuumStep 3: Value selection

- Finally, value is determined with a second commercial guide whose samples are arranged in increasing lightness (B1-C4)

- An observer will be able to assess the value most effectively by observing from a distance, standing slightly away from the patient, and looking through a squinted eye, reducing the light that reaches the retina. Stimulation of the cones is reduced and greater conditions to achromatic vision may result

Page 5: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Vita Pan 3D Master

• There are 5 lightness levels (plus an additional level for bleached teeth)

Page 6: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Vita Pan 3D Master

Step 1: Value

- Select one out of the 5 value groups

Page 7: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Vita Pan 3D Master

Step 2: Chroma

- Choose the appropriate chroma by using the M subgroup first and choosing between level 1, 2 or 3

Page 8: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Vita Pan 3D Master

Step 3: Hue

- Choose the appropriate hue by choosing either more reddish (R) or more yellowish (L)

- Available in two chroma for group 2, 3 & 4

Page 9: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Shade guides• Other available systems,

- Extended shade guides

- Dentin shade guide

- Custom shade guide

Page 10: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Instrumental color analysis

• Inconsistencies can result from factors such as physiological, psychological, age & fatigue

• Instrumental color analysis is an alternative offering objective, quantifiable & more rapidly obtained shade matching

• Various color measuring instruments exist: colorimeters, spectrophotometer, and digital image analyzers

Page 11: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Instrumental color analysis

• Colorimeters, spectrophotometer are unsuitable for routine dental use because of their limited ability to measure the color of translucent objects

• In addition, colorimeters are adapted for flat surfaces and not curved teeth surfaces

Page 12: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Instrumental color analysis

Page 13: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Surface characterization• Stains can be added to the surface of the restoration to produce better tooth integration & natural appearance

• Used only for minor changes, to achieve:

1. Shade modification2. Specific characterization3. Special illusions of form or

position

Page 14: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Shade distribution chart

• The tooth is divided into three regions: cervical, middle & incisal

Page 15: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Surface characterization• Advantages

- Dentist can modify the shade after completion of

the restoration

• Disadvantages

- Stains are applied to the surface only

(unrealistic)

-If excessive can cause loss of fluorescence &

increased metameric effect

- Restoration becomes slightly rougher

- Stains are soluble & wear with time

Page 16: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Shade modification

a. Chroma & Hue adjustments

• Increasing chroma and changing hue

• Pink purple moves yellow toward yellow red, yellow decreases red to yellow red

• If we desire to decrease the chroma we usually use the complementary colors (yellow requires blue-purple & orange, blue-green) however rarely successful

Page 17: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Shade modification

b. Value adjustments

• Can be reduced by adding complementary color (violet for yellow)

• Increase the value if the dominant color has a greater lightness such as staining with white but the opacity will increase & rarely successful

Page 18: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Specific characterization

• Hypocalcified areas• Proximal colorations

• Enamel cracks• Stained crack lines

• Exposed incisal dentin• Incisal halo

• Translucency

Page 19: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Specific characterization

Page 20: Shade guides Shade tabs - Each shade guide consists of multiple shade tabs

Thank you