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What needle depth is needed for Dr. Pen to treat stretch marks?

Quelle profondeur d'aiguille faut-il pour que le Dr Pen traite les vergetures ?

par Liang Jiawen dans Actualités

Pour traiter efficacement les vergetures à l'aide d'un appareil de microneedling Dr. Pen, vous avez généralement besoin d'une profondeur d'aiguille comprise entre 1,5 mm et 3,0 mm.

Étant donné que les vergetures (striae) sont en réalité des déchirures qui se produisent profondément dans la couche dermique de la peau – et parce que la peau du corps est significativement plus épaisse que la peau du visage – des aiguilles peu profondes ne peuvent tout simplement pas atteindre la profondeur requise pour briser le tissu cicatriciel et déclencher une nouvelle production de collagène.

Une analyse plus détaillée permet de déterminer la profondeur exacte nécessaire pour des situations spécifiques :

Selon le type et l'âge des vergetures

  • Vergetures neuves, rouges/violettes (Striae Rubrae) : 1,5 mm et 2,0 mm.

    Celles-ci sont encore dans une phase de guérison active et inflammatoire. Parce qu'elles sont plus récentes, elles répondent plus rapidement et ne nécessitent pas une profondeur maximale immédiatement. Il est fortement recommandé de commencer à $1,5\text{mm}$ pour vos premières sessions afin de jauger la tolérance de votre peau.

  • Vergetures anciennes, blanches/argentées (Striae Albae) : 2,0 mm et 3,0 mm.

    Les vergetures plus anciennes sont essentiellement des tissus cicatriciels matures et estompés. Elles nécessitent un remodelage dermique plus profond pour forcer la peau à relancer sa synthèse de collagène et à combler les profonds "cratères" ou crêtes.

     

Par zone du corps (épaisseur de la peau)

  • Zones de peau fine (intérieur des bras, seins, intérieur des cuisses) : 1,5 mm

    La peau des seins et de l'intérieur des bras est délicate. Aller trop en profondeur ici peut provoquer des marques, des ecchymoses sévères ou des lésions cutanées.

  • Zones de peau plus épaisse (abdomen, extérieur des cuisses, hanches, fesses) : 2,0 mm et 3,0 mm.

    Le derme de l'abdomen et des fessiers est assez épais et peut supporter des réglages plus profonds en toute sécurité pour atteindre la racine des vergetures.

Considérations importantes :

  • Utilisez une crème anesthésiante : Les profondeurs de 1,5 mm et plus sur le corps peuvent être douloureuses sans anesthésique topique (comme 4 % ou 5 % de Lidocaïne).

  • Utilisez la bonne cartouche : Les cartouches à 12 ou 16 aiguilles sont les meilleures pour les tissus cicatriciels profonds et les vergetures car moins d'aiguilles rencontrent moins de résistance de la peau, ce qui leur permet de perforer proprement à la profondeur correcte. (Alternativement, une 36 aiguilles peut être utilisée pour une couverture large et superficielle sur de grandes zones comme l'abdomen, mais elle peut ne pas pénétrer aussi profondément en raison de l'effet "lit de clous").

  • NE TRAÎNEZ PAS le stylo : Lorsque vous travaillez à des profondeurs de 1,5 mm à 3,0 mm, utilisez un mouvement de "tamponnage et levage". Glisser ou faire glisser le stylo sur la peau à ces réglages profonds coupera la peau et causera des micro-déchirures ou des marques de traçage.

  • Espacer les séances : Le microneedling profond nécessite un minimum de 4 à 6 semaines entre les séances pour permettre au derme profond de se reconstruire.

  • Désinfection : La stérilisation doit être impeccable pour prévenir les infections des tissus profonds. Ne réutilisez jamais les cartouches.

Pour des directives officielles, veuillez consulter le Guide approfondi de microneedling Dr. Pen ou la section FAQ sur le site officiel de Dr. Pen pour des recommandations détaillées concernant les aiguilles de traitement et les soins post-procédure.

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