Primary crown completion times

[7mag]

Does anyone know which crown completion and eruption times are used on boards for the primary dentition? I guess it wouldn't be hard to learn them both, but I would rather not. I don't want to miss a few questions because of the discrepancy between the sources. Woelfel's has some differences that are pretty significant for the incisors, enough to miss the question. There are two different times listed in that text.
Thanks

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[BigSmiles]

I think a basic formula to remember is that crown completion is 2-3 months BEFORE eruption...and root competion is 2-3 years AFTER eruption. That's how i remembered it and got an 89 on the exam DA section.

 

[7mag]

Thank you, I'll go off of that