๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
Surface contour
Surface contour
In addition to wound geometry and tissue elasticity, the contour of the surgical site may also affect the closure and formation of dog ears. Because the geometric principles of lines and angles differ between planar and curved surfaces,6 the prudent surgeon must account for the curvature of the skin when preparing an excision. Due to these geometric differences, fusiform angles on a convexity should be less than 30 degrees to produce a closure result comparable to that of a similar wound on a flat surface. Conversely, on a concave surface, the wound can often be closed with angles larger than 30 degrees.6 In short, closure on a convex surface is more likely to produce dog ears, whereas concave surfaces are more forgiving.1,2