Each of the following is a component of initial (Phase I, nonsurgical) periodontal therapy EXCEPT:

Initial/Phase I therapy includes scaling and root planing, oral hygiene reinforcement, antimicrobial therapy when indicated, and addressing modifiable risk factors (including dietary counseling in some protocols). Periodontal surgery is a Phase II (surgical) intervention, performed only after re-evaluating the response to initial nonsurgical therapy — making it the exception.