The problems with extraction are adjacent teeth shifting, and the possibility of cavitations. I guess wisdom tooth removals are least likely to cause other teeth to shift, as there are no teeth behind them. If the wisdom teeth are removed, then removing the tooth that is in front of them would also not have this problem. I guess if they are extracted properly and the periodontal ligament removed, there might not be any issues. Having said that, I have never had a tooth extracted. I also had very large mercury fillings in my wisdom teeth. I am not a fan of extraction, as even if there isn't a problem from the extractions, one needs to be able to chew well to get proper absorption of food. There is no ideal answer, and no ideal material to fill cavities.