I don't know where you're getting that number from. For all dental anesthesia the risk rate seems to be literally 1 in a million [1] and the various law firms which popped up during that search suggested better then 1 in 300,000 at least.

Which also omits the base level mortality of dental complications wisdom teeth are likely to cause.

[1] https://pmc.ncbi.nlm.nih.gov/articles/PMC5535496/

Table 1 in your link does not support 1 in a million for general anesthesia procedures, unless I’m badly misreading it.

Nor does the discussion section nor overall summary figure, which is 3 in a million for all forms of anesthesia (local, sedation, and general), where you have to at least exclude local anesthesia (the most common type) as having a fundamentally lower risk of death than sedation or GA.

You're right I misread it - the headline number is inline with the other quoted values of closer to 1 in 320,000 or so.