Upper third of the face (trichion – glabella)
Aging of the upper third of the face is characterized by the lack of the amount of tissue in the forehead, eyebrows, upper limbs, and blind spots.
Aging of the subcutaneous tissue in the forehead area gives the illusion of nasal dilation due to an increase in the angle between the forehead and the nose. Eyebrow removal and loss of skin elasticity lead to "relaxation" of the upper eyelids.
Middle third of the face
The middle third of the face starts from the ground point of the glabella and extends to the subnasal point. In this part, the most important is the position of the fat pad that defines the roundness of the cheeks, and thus the profile of the youthful face marked by the bulge. The fatty pad covers the cheekbone and the outside of the cheek. As it ages, the fat pad slides forward and down and leads to a further deepening of the nasolabial fold, leaving behind the wrinkle where the cheek once was.
The ideal angle between the tip of the nose and the upper lip is 90-120 degrees.
Loose skin under the lower eyelid leads to the protrusion of fatty tissue and the eye cavity. This creates the eyelid sacs and emphasizes the area around the tear duct.
Likewise, the circular eye muscle comes into very close contact with a thin skin of poor elasticity causing dark "circles" around the eyes.
Lack of subcutaneous adipose tissue and hyperfunction of the circular muscles of the eye form the wrinkles on the eyeball, around the outer corner of the eye in the form of crow’s footprints. The nasal cartilage weakens, causes the nasal tip to sag, and the angle between the nasal tip and the upper lip decreases.
Lower third of the face (subnasal part – chin)
The lower third of the face extends between the imaginary points of the nose and chin.
As the lower part of the face ages, the volume of adipose tissue increases due to the lowering of the cheeks and eyelids. The alveolar bone weakens, the bite falls and wrinkles intensify, starting from the corner of the mouth and are going towards the edge of the lower jaw, while the chin begins to protrude excessively. The mandibular line is lost from the profile and drooping cheeks begin to form due to loss of skin elasticity and loss of strength of the main masticatory muscle ligament. Chewing bags or drooping cheeks give the expression of a sad, loose "hanging" face.
Bumps of fatty tissue in the chin region lead to further loss of the angle between the neck and lower jaw causing the appearance of the so-called turkey neck.
The circular lip muscle and its hyperfunction, combined with the loss of elasticity of the surrounding supporting tissues, increasingly emphasizes wrinkles around the lips, twisting the corner of the mouth ( young people have the corner of the mouth turned up, but aging turns it down and gives the impression of a depressed or sad face), and wrinkles that extend from the corner of the mouth along the chin (marionette line) and give a sad facial expression.