You can't protect your dental health just by "damage control" and don't be satisfied with just a one-shot treatment. It is advisable to make efforts toward preventive maintenance so as to keep your dental health in good condition.
(From an unofficial answer of Kyoto University's entrance exam in 2005)
I know this means an effective attempt which can be used only once. However, lexico says this is only used by North American. Also, I need a little more formal but not obsolete expression which means the same. Is there any more common expression which has the similar meaning?