In this case, wouldn't a temporal ban of this antibiotic make the resistance disappear?
Yes, but there are now so much antibiotics and antibiotic resistant bacteria in the environment that I think it would take a long ban (many years?) in order for the antibiotics to break down and the resistant bacteria to become fleetingly scarce enough to be clinically practical. I don't think there are enough classes of effective antibiotics right now to drop and entire class and still ethically be able to treat everyone. In the future when there might be more antibiotic classes, that might be a good strategy. In the individual patient, the paper linked below takes the approach of alternating or cycling the antibiotics in order to slow resistance.
http://www.pnas.org/content/111/40/14494.full?sid=89ab50f5-d756-4cac-ba17-9bb8525506a4
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