^ Thank you, Hykey. Really hope so too.
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And @ MLA.. I think the system/the drawing you've posted leaves room for mistakes.. in the 'oral' profession, I mean.
Let's say nr. 21 is extracted 10 years earlier and 20, 19, 18, and 17 gradually moved forwards during that time (like they usually do).. dentists/the oral profession could make mistakes concerning 17-20.
Well, I forgot to mention that the teeth extracted earlier (in life) are not included in the 'Dutch' system any more. Um, let's say, hypothetically, 30 and 31 are extracted, 32 in your drawing/pic becomes, in the system explained to me by my dentist (and used in general here), 'tooth' 46. Tooth number 6, counting from the middle of the 4 ripper teeth, in the fourth quarter/right jaw under. Little doubt which tooth is referred to then. (in medical dossiers)
Really wonder US dentists use the system you mentioned now.