There are so-called risk points on a person's face – places too medial to block horizontal forehead wrinkles. The introduction of botulinum toxin into these points can lead to the formation of the so-called "eyebrows of Mephistopheles". The abdomen of the corrugator is too low a point to block the head of the corrugator.
Risks of Mephistopheles Eyebrows especially increase in women prone to the formation of pastosity. Intramuscular injection into the tail of the corrugator is also categorically unacceptable; botulinum toxin can only be injected at this point. intradermally.
Blockade lateral to the internal canthus and below the horizontal line is also unacceptable, especially in older patients. That is, the square that forms eyebrow the inner canthus and the line dividing the forehead horizontally in half is a strictly prohibited area for intramuscular injection of botulinum toxin!
Injections in this area may be performed solely for the purpose of blocking the tail of the corrugator when it is active.
How to correctly block the tail of a corrugator
The rest of the injections to block horizontal forehead wrinkles are given above the line dividing the forehead horizontally in half. Moreover, when blocking the tail of the corrugator, it is necessary to understand that the retraction that forms the skin during the activity of the corrugator is the tip of the active muscle that is woven into the skin.
The blockade should be done intradermally 2-3 mm medial to the retraction, not into the retraction itself. This is usually 0.5 divisions at a 1.5 ml dilution, that is, 4 units of botulinum toxin, which is more than enough to block the tail of the corrugator.
Why can't botulinum toxin be injected below the external canthus
The classic point of crow's feet blockade is below the external canthus. Outer canthus is a border that after 30 years with a normal face is absolutely uncrossable. If a person from adolescence has a laid nasolacrimal groove, & nbsp; even at 20-25 years old, the line passing horizontally through the outer canthus is the boundary below which it is impossible to inject botulinum toxin, because below the outer canthus the portion of the circular muscle of the eye is lifting. Any blockade in this area at a younger age aggravates the nasolacrimal sulcus, causes persistent edema, and at an older age, with dry thin skin, it shifts & nbsp; horizontal folds of atonic skin towards the bridge of the nose.
When can horizontal creases on the lower eyelids be blocked
In the same way, already laid bags are aggravated. Hernia – this is not what is above the nasolacrimal sulcus, but what is above the lower edge of the orbit. Above the nasolacrimal sulcus is the suborbital-molar complex, which is not surgically removed. A branch of the motor nerve passes through the molar packet, which in it, like a fan, scatters in several rays to the lower eyelid.
Therefore, any surgical manipulation in this area can end in failure. Horizontal folds on the lower eyelids can be blocked when it is known for sure that this is the third portion of the orbicularis oculi muscle. Most have two, and 30% have three servings. The dorsal portion of the orbicular muscle of the eye is very narrow, many women perceive it as a hernia, which is actually just a skin fold.
When liposuction of this fold is performed, its scarring develops and, as a result, deformation of the lower eyelid. You can only block these folds with a sufficiently active dorsal portion of the circular muscle of the eye and a fairly young age.
Read also: "Features of Botulinum Toxin in the Forehead and Nose"
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