In the immediate sense there would be no additional maintenance costs.
The engineers would only have to look at the engines if you also reported an EGT or N1/N2 exceedance. Even then if the exceedance was small it is likely there would be no action required IAW the MM.
It is remotely possible that the overhaul life of the engine would be slightly reduced
The only engine I am aware off in which full power results in increased maintenance costs in the shorter term, is the V2500 fitted to the airbus. In this case if BUMP is used then it must be logged as the type is only allowed a certain number of BUMP take offs. This option is used on short fields and increases the turbine case cooling air to reduce turbine tip clearances and so increase engine efficiency. At the same time however, the blade tips tend to rub the casing thus reducing engine life.