其实这个我学的很少，都是借花献佛而已。不过似乎功能的重建是更重要的考虑因素，手指的数量和美观应该是后面需要考虑的因素。
A number of factors need to be considered when digital reconstruction is planned:
length, position, mobility, power, stability, sensation, and cosmesis. For the reconstruction
to be functionally and aesthetically satisfactory, the surgeon should restore
as many of these factors as possible.
In addition to considering factors important for reconstructing individual digits,
it is vital to insure that the reconstruction improves hand function as a whole.
Digital reconstruction must be aimed at improving one or more of the various forms
of pinch (tip pinch, pulp pinch, key pinch, chuck pinch) and / or grip (cylindrical
grip, spherical grip, power grip, hook grip) in addition to providing better flat hand
function, and cosmesis. It should be remembered that length, stability, and sensibility
are most important in the radial digits, which are responsible for dexterity functions,
whereas mobility is more important in the ulnar fingers, which provide power
grip functions.
It is not necessary to have five digits on a hand for good function. On many
occasions it may be better to have less digits, especially if those present are able to
provide good function, are not painful, and have good sensibility. If a reconstructed
hand is to have less than five digits, care should be taken to avoid creating functional
problems, such as a gap between fingers in the central part of the hand, or a tight
first web space.
