Hey, I've got a similar issue on my left hand middle finger ! ( basket ball hit, from teenage years )
there is a 20 degree angle there, but I am used to it playing the guitar. It does not work 100% but quite so - ie i may have some added difficulty at some LH pull on/offs where there is also a barre or a strange position invovled, so the finger approaches at 90 degrees or so the fretboard..
Thinking It would need an operation, I live it as it is.. Anyone think it worths a look after now , after 20+ years?
Paulino Bernabe Especial 2009
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Yamaha cg 110 1988 (the 1st)
2014: the comeback