I'm preparing to teach a class in local anesthesia to dental hygienists.

For the life of me I can't seem to understand % concentration.

The textbook says that a 2% solution of lidocaine is equal to 20mg/ml.

A 3% solution is equal to 30mg/ml and so on.

I don't understand how they come up with 20.

1ml must equal a thousand of something!

For the life of me I can't seem to understand % concentration.

The textbook says that a 2% solution of lidocaine is equal to 20mg/ml.

A 3% solution is equal to 30mg/ml and so on.

I don't understand how they come up with 20.

1ml must equal a thousand of something!

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