TrazaTono

56% fail shade matching. You wont.

Shade precision your lab can verify. 4 guided photos, 3 color zones, calibrated result. Your lab receives exact data — to accelerate production.

CIEDE2000
ΔE00 dental-optimizado
3 Zones
Cervical / Body / Incisal
49 VITA Shades
Spectrophotometer D65
FULL EXPERIENCE

4 photos. 3 zones.
Zero interpretation.

TrazaCaptura guides you. TrazaTono analyzes with CIEDE2000. Your lab gets calibrated data.

Shade matching by eye fails. And the lab pays.

26% of remakes in anterior restorations are due to shade errors. It's not lack of skill — it's lack of science.

Variable ambient light

The fluorescent light distorts perception. Every hour of the day produces a different result on the same tooth.

White balance

The camera adjusts automatically. The shade you see on screen is not the real shade of the tooth.

Subjective perception

Two people see the same tooth and report different shades. Visual fatigue worsens throughout the day.

No standardization

"It's an A2... or maybe A3." Without a scientific reference, every case is a gamble.

Pipeline

7 steps. Zero subjectivity.

From clinical photo to VITA shade with scientific confidence.

1. Clinical capture

Photography with TrazaScale reference card under operatory conditions.

TrazaCaptura — Shade Mode

2. Von Kries Correction

Automatic chromatic adaptation. Compensates the color temperature of the operatory light using the white reference.

White Balance — automatic

3. Specular masking

Flash reflection pixels are automatically excluded. Gingival filtering in the cervical zone prevents gum contamination.

4. 3-zone segmentation

The tooth is divided into cervical, body, and incisal. Each zone is analyzed independently — because the lab needs that precision to layer ceramic.

Cervical / Body / Incisal

5. CIE L*a*b* Conversion

sRGB → Linear RGB → CIE XYZ (D65) → CIE L*a*b*. Perceptually uniform, device-independent color space.

6. CIEDE2000 Matching

ΔE00 calculation against 49 VITA shades with dental parameters: kL=2, kC=kH=1. Weighs luminosity, chroma, and hue.

ΔE00 — Dental gold standard

7. Result with confidence

VITA shade per zone, confidence ΔE, clinical threshold rating, and "go lighter" recommendation. Automatically saved to the case.

Automatic — zero clicks
Zone analysis

A tooth doesn't have a single shade.

The cervical zone is more saturated and darker. The body is the dominant shade. The incisal edge is more translucent and lighter. TrazaTono analyzes each zone independently — because the lab needs that precision to layer ceramic.

Cervical Zone

Higher saturation, gingival influence. Higher a*b* values.

Body Zone

Dominant shade. Primary reference for VITA selection.

Incisal Zone

Greater translucency, lower saturation. Key for natural appearance.

TrazaTono — Tooth #11
Cervical
VITA A3.5 · L*68.2 a*4.1 b*22.8
0.6
ΔE00
Body
VITA A2 · L*76.4 a*1.8 b*17.3
0.4
ΔE00
Incisal
VITA A1 · L*82.1 a*0.3 b*11.6
0.7
ΔE00
All zones within clinical threshold
ΔE00 average: 0.57 · Classification: Imperceptible
Database

49 shades. Real values.

Every L*a*b* value measured with spectrophotometer under D65 illuminant, 2-degree standard observer.

16

VITA Classical

A1-A4, B1-B4, C1-C4, D2-D4. The most widely used system in dentistry worldwide.

29

VITA 3D-Master

Three-dimensional system organized by luminosity, chroma, and intensity. Greater precision in intermediate shades.

4

Bleach

BL1-BL4. Bleaching shades for high-luminosity aesthetic cases.

All L*a*b* values measured with spectrophotometer under D65 illuminant. Database verified against published sources.Sources: O'Brien, Yap, Cal, Paravina & Powers
Clinical precision

Published thresholds. Not arbitrary numbers.

TrazaTono rates every match against ISO/TR 28642 and Paravina et al. 2015. Dental parameters: kL=2, kC=kH=1.

Imperceptible< 0.8
Excellent< 1.8
Acceptable< 2.25
Mismatch> 3.5
ΔE00 (CIEDE2000) — kL = 2 (dental luminosity tolerance)
ΔE < 0.8
Imperceptible

No visible difference to the human eye. Perfect match.

ΔE < 1.8
Excellent

Detectable only with instruments. Clinically perfect.

ΔE < 2.25
Acceptable

Visible but within tolerance. Most people won't notice.

ΔE > 3.5
Discrepancy

Visible discrepancy. Remake territory.

"Go lighter" recommendation

When the match is marginal, TrazaTono recommends the lighter shade. The lab can darken with external staining. A dark shade means remake. Chroma-dependent thresholds per Gomez-Polo et al. 2023.

Paravina RD, et al. "Color difference thresholds in dentistry." J Esthet Restor Dent. 2015;27(S1):S2-S9. Gomez-Polo C, et al. "Chroma-dependent perceptibility thresholds." J Prosthodont. 2023. ISO/TR 28642:2016 — Dentistry. Guidance on colour measurement.
Comparison

How it compares.

TrazaTono vs. alternatives on the market.

FeatureTrazaTonoCamera aloneShadeWaveeLAB PrimoSpectrophotometer
CostIncluded (free)Free~$300~$250+$6,000-$12,000
HardwareNone (browser)NoneProprietary deviceProprietary kitDedicated device
CIEDE2000 (ΔE00)ΔE*ab
VITA Shades49 (Classical + 3D-Master + Bleach)162916-29
3-zone analysis Cervical / Body / IncisalManual repositioning
Ambient subtraction Auto dual captureIntegrated LED
Clinical thresholdsISO/TR 28642 + Paravina
Integrated with cases Automatic

Frequently asked questions

How accurate is TrazaTono compared to a spectrophotometer?
TrazaTono uses CIEDE2000 with kL=2 and a database of 49 shades measured with a spectrophotometer. With TrazaScale calibration, precision is clinically comparable (ΔE00 < 1.8 in most controlled conditions). It does not replace an $8,000 spectrophotometer, but it eliminates the subjectivity of the human eye at zero cost.
Do I need special hardware?
No. TrazaTono works with any phone with a camera and modern browser. The only additional piece is the TrazaScale card, included free with every account.
How does ambient light subtraction work?
In Shade mode, TrazaCaptura takes two photos automatically: one WITHOUT flash and one WITH flash. By subtracting the no-flash image from the flash image, operatory light contamination is eliminated. The result is an image illuminated solely by the flash — controlled conditions for precise color analysis.
Does it work with VITA 3D-Master?
Yes. The database includes 16 VITA Classical (A1-A4, B1-B4, C1-C4, D2-D4), 29 VITA 3D-Master (0M1 to 5M3), and 4 Bleach (BL1-BL4). All values are spectrophotometer-measured from published sources.
How much does TrazaTono cost?
Included at no additional cost with any TrazaLab plan. No charge per tool, per photo, or per analysis. Free 14-day trial, no credit card required.

Precision you see.
Science that convinces.

26% of remakes start with an incorrect shade. TrazaTono makes it impossible.