The standard probing depth, which requires referral to periodontist, at the time of evaluation of phase 1:

 # The standard probing depth, which requires referral to periodontist, at the time of evaluation of phase 1: 

A. 5 mm 

B. 6 mm 

C. 7 mm 

D. 8 mm 

The correct answer is A. 5 mm.

Pocket depth of 5 and above should be referred to a periodontist.