Need for preventive steps of dental hygiene cleaning if on bisphosphonate?

None. No special needs other than your normal excellent brushing, flossing, irrigation (waterpik) and any other techniques you use. Always recommend cleanings / check-ups twice a year . Many benefit from a third or fourth cleaning in between. You can never be too clean !
None. None. Keep your teeth healthy so as to prevent having any teeth extracted.
Same as usual. There are no specific hygiene steps if you are on bisphosphonates you should floss and brush as usual.Use an electric brush with soft bristles and a mouth wash, a waterpick can be a good idea as well.A talk to your dentist or hygienist and keep a rigorous dental hygiene schedule to avoid any unnecessary gum or bone infection that may lead to an extraction.