Cheiloscopy

CHEILOSCOPY

a forensic science

technique used to

identify individuals by

examining the unique

patterns of lines and

wrinkles on the lips,

also known as lip

prints

sulci labiorum rubrorum

wrinkles and grooves

visible on the lips have

been named by

Tsuchihashi as

Santos

Lip prints were first classified by ____ into two categories:

SIMPLE WRINKLES and COMPOUND WRINKLES

What are the two categories in lip prints

• Straight line

• Curved line

• Angled line

• Sine-shaped curve

What are the simple wrinkles

• Bifurcated

• Trifurcated

• Anomalous

What are the compound wrinkles

Type I

(Tsuchihashi classification) Clear-cut vertical grooves

that run across the entire lip

Type I’

(Tsuchihashi classification) similar to type I, but do not

cover the entire lip

Type II

(Tsuchihashi classification) Branched grooves

Type III

(Tsuchihashi classification) Intersected grooves

Type IV

(Tsuchihashi classification) Reticular grooves

Type V

(Tsuchihashi classification) Grooves that cannot be

morphologically differentiated

glass, clothing, and cigarette butts

modern lipsticks can leave behind

invisible but permanent lip prints on

surfaces like?

aluminum powder and magnetic powder

invisible lip prints can be visualized

using agents such as

sebaceous and sweat glands

This will make the development of

latent lip prints without the need for

lipstick

PERMANENCE CONCERNS

lip print patterns are generally considered permanent;

however, major trauma or surgical alterations to the lips can

lead to scarring, affecting the size and shape of the lip grooves

ANATOMICAL VARIABILITY

the lips' position near the vermilion border is highly mobile.

variations in pressure and direction during lip contact can

cause differences in the appearance of lip prints, potentially

leading to misidentification

NEED FOR STANDARDIZATION

to ensure reliability in forensic investigations, there is a call for

standardized protocols in collecting and analyzing lip prints.

without these standards, lip print analysis may not withstand

rigorous legal scrutiny

LATENT LIP PRINTS

the edges of the lips contain

sebaceous and sweat glands,

allowing for the development of

latent lip prints without the need for

lipstick