๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
Biomechanics
Biomechanics
At the first glance, the bilobed flap appears to be a modified rotation flap with some component of transposition. However, during the movement of tissue, there is a greater release of tension than would be expected with rotation alone. The mechanical release of tension is due to the Z-plasty that is inherent within the flapโs design.11,12 The lengthening effect of the Z-plasty overcomes the otherwise significant pivotal restraint, enabling the primary defect to be repaired without tension.
A prototypical bilobed flap on the nose involves several unique features: greater movement about the pivot point because of its position near recruitable medial cheek, double transposition design displacing the tension vector away from the primary defect, lengthening effect of the Z-plasty to overcome pivotal restraint, and less than 45 degrees of transfer between each lobe to minimize standing cone deformity.