Yes ligament is the right word and I assume the ligament is completely fractured as the toe is pretty well flat.
With regard to cutting the nail back to the toe, after this is done I will need to stem the blood flow with potassium permanganate? And if completely ruptured a months rest is enough?
My line of thought is, if the ligament is ruptured then the other toes will need to compensate the bad toe. The lack of support from the bad toe, increases the pressure on the other toes by 25% and this compensation can only be achieved over time.
Would your honour say this is correct?