2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/118544The search of consistency between nebular and massive star abundances has been a longstanding problem. I briefly review what has been done regarding to this topic, also presenting a recent study focused on the Orion nebula: the O and Si stellar abundances resulting from a detailed and fully consistent spectroscopic analysis of the group of B stars associated with the Orion nebula are compared with the most recent nebular gas-phase results.4 pages, 1 figure, to appear in "The Metal Rich Universe" Conference ProceedingsAstrophysicstext