If you are worried about "nerve injury" while removing the wisdom tooth , then performing orthodontic extrusion is an option . You can discuss with your dentist about other options available for salvaging the teeth .couldn't suggest other options as you haven't provided the X-ray. If the removal is done with more care ,nerve injury can be avoided . Your dentist has informed you of a possible risk which may or may not happen . It is a routine to inform the patient of possible risks ( informed consent ) Minor nerve injuries usually reverses in six months if at all it happens very rarely .