Análise geométrica da forma da beleza da mama e da forma de prótese baseado na proporção Phi: aplicação prática

INTRODUCTION: The authors observed dissatisfactory and inconsistent results in the final shape of the breast after placement of conventional prostheses in cases of hypomastia, and few studies regarding breast or implant shapes. METHODS: They described Phi (1/1.618..), historically known as the golden or divine ratio. They argued its importance to shapes in general, registered in the human limbic system as the value of beauty, harmony and balance of proportion. They proposed an anatomy of the beautiful breast shape from a three-dimensional, geometric view (frontal, lateral and vertical views), based on Phi. They classify the breasts according to shape, including the different hypomastias. They propose a new shape for breast implants, which contains the ratio Phi, covered with polyurethane. The specific prosthesis to be used is chosen according to the vertical measure of the patient's thorax from the frontal view and the type of hypomastia. RESULTS: Ten pairs of breast prostheses were specially manufactured and implanted in ten patients who were accompanied for 12 months, presenting good final results in terms of shape and volume. CONCLUSION: Based on Phi, it is possible to establish a geometric, three-dimensional view of the beautiful breast in terms of shape as well as implants with the same shape, manufactured also using Phi, to correct hypomastias. In addition the method offers a simple way to choose implants, obtaining good and consistent results of breast shape and size, and reducing subjectivity.