BPV (benign positional vertigo): what else is known or suspected about this?

I've read about BPV, benign positional vertigo. I know that when there has
been no trauma to the head, BPV can strike just due to aging. But I wonder
if any researchers suspect other things about this problem.

Is there any thought that calcium imbalance in the body leads to the
crumbling of tiny calcium particles in the inner ear, a particle or
particles then getting into some part of the balance organs where
it/these shouldn't be?

In terms of recurrence in an individual, how many recurrences of BPV lead
a person to seek surgery to prevent BPV-- 3 bouts of recurring BPV, 10,
20, what number? And when there is no desire for surgery, do recurrences
tend to finally end at some point? [I'm wondering if, for some, BPV is
just something that one has to go through 'til these bad
dizzy-and-nauseating-periods end permanently perhaps because some change
in the body no longer allows them to occur.]

Also, is it possible for an individual <who suffers from recurring bouts
of BPV> to do the Epley head maneuver by himself (i. e. unaided) to bring
about an instant cure or does success in doing the maneuver depend on
self-done or MD-done tests to first determine in which ear the problem is
occurring?

Any other info on what non-traumatic things lead to BPV?


Thanks



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