There are TONS of Metacrill /
PMMA disasters. Mostly in Brazil. Talk to Dr N about that, she has great knowledge. The first problem is the Dr´s technique, which, if not exact, can ruin everything. The major problem is that in Brazil and many other countries the ´doctors´ use cheap metracrill /
PMMA copies ( it appears there are A LOT ) which will definitely result in complications sooner or later.