A method for the design of a device and/or material for inserting or implanting in tissues of the human or animal body comprising the following stages: a) the acquisition of a digital image of the structure of a tissue destined to receive a device or implant, said image identifying areas of tissue with different densities of matter; b) the calibration of the colour level of said areas of tissue with different densities of matter, comprising the assignment of a first colour level to the areas of tissue with the greatest density of matter (d max) and a second colour level to the areas of tissue with the least or no density of matter (dmm), the values of said maximum (d max) and minimum (d mm) density of matter being referred to the type and location of said tissue; c) the calculation of the colour level of said image comprising the assignment of said first colour level if the image contains at least 60% of said first colour, or the assignment of said second colour level if the image contains no more than 40% of said first colour; or the division of said image into four quadrants if the image contains between 60% and 40% of said first colour level; d) the calculation, where necessary, of the colour level of each of said four quadrants obtained at the previous stage c), comprising the assignment of said first colour level or of said second colour level, or a further division into four quadrants using the same assignment criterion as in said stage c); e) the iteration of said stage d) until quadrants of sufficiently limited dimensions are obtained with respect to the dimensions of said device or implant; f) the arbitrary assignment of a distinguishing colour to all the quadrants that have the same dimensions; g) the calculation of the total number of quadrants that have been assigned said first colour level, corresponding to the areas of tissue with the greatest density of matter and the expression of said number of quadrants as a percentage of said image of the structure of said tissue, and the calculation of the number of quadrants for each recursion level and the percentage weight of each recursion level with respect to the total; the calculation of the total number of quadrants that have been assigned said second colour level, corresponding to the areas of tissue with the least or no density of matter and the expression of said number of quadrants as a percentage of said image of the structure of said tissue, and the calculation of the number of quadrants for each recursion level and the percentage weight of each recursion level with respect to the total; i) the analysis of the quadrants obtained at said previous stages, comprising the determination of the clusters of adjacent quadrants having said first colour level corresponding to the areas of tissue with the greatest density of matter, and of the clusters of adjacent quadrants having said second colour level corresponding to the areas of tissue with the least or no density of matter; l) the generation of artificial clusters of quadrants having geometrical characteristics that reproduce or approximate the characteristics of said clusters of adjacent quadrants described in stage i); m) the design of said device for inserting or implanting in tissues of the human or animal body using the characteristics established during said stage l).