Analysis of Facial Skin Pores with a Video Microscope to Determine the Relationship between the Pore Direction and the Cutaneous Mechanical-Anisotropy

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  • ビデオマイクロスコープを用いた顔面の毛穴解析
  • ビデオマイクロスコープを用いた顔面の毛穴解析 : 方向性と力学的異方性との関連
  • ビデオマイクロスコープ オ モチイタ ガンメン ノ ケアナ カイセキ : ホウコウセイ ト リキガクテキ イホウセイ ト ノ カンレン
  • ─方向性と力学的異方性との関連─

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Recently a number of studies on the facial skin pores have been reported. The shape of pores is ellipsoidal but non-circular, and the elliptic distortion increases with age. Many factors such as menstrual cycle, ultraviolet irradiation, sebum secretion, and dry skin affect the size of pores. However, few studies focus on the relationship between the direction of pores (the angle of the long axis of the ellipse) and the cutaneous mechanical-anisotropy. This study examined the pore size and its direction at six different sites on the face by image analysis with a video microscope and software (Integral, Tokyo, Japan). The directions of pores in the forehead, chin, and upper and lower cheeks of the both sides of the face run along the Langer's lines. The size of pores in the upper cheek was larger than those of other sites. This study also measured the cutaneous mechanical-anisotropy with CutiScan (C＋K, Cologne, Germany). The low extensible direction of the skin was found to correspond to those of the pores and the Langer's lines. Finally, this study investigated the effect of a 4-week treatment with skincare products on the shape of pores. The total area of pores significantly decreased with improvement in the skin condition, which was confirmed by an increase in water content in the stratum corneum and a decrease in the transepidermal water loss. However, the direction of pores could not be changed.

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