This is covered extensively on our website. Please check out the Suboxone mega thread. Also, use the search engine to search for 'precipitated withdrawal'. Use advanced search, and change it to 'Search Titles Only'. This way you get a lot better search result.
To answer you question, if I understand correctly - If you are taking suboxone, and then try and get high on oxy, you'll have to wait until you start getting sick again to take more suboxone. If you take it too soon, it'll throw the oxy off of your receptors rapidly, which is what precipitated withdrawal is. Precipitated withdrawal is horrible, you absolutely do not want to experience it. Imagine an entire 5 day heroin/oxy detox compacted into about an hour or two.
So, as long as wait until you're in withdrawals again after taking the oxy, dosing suboxone shouldn't cause you any problems.
But if you are on maintenance, it is probably best to just stick with it, since you are trying to quit using oxy's, right?