Seventy patients will be previously treated for moderate-to-severe periodontitis according to
their individual needs. Thirty days after completion of periodontal treatment, these patients
will be randomized to one of the following groups of periodic preventive maintenance (PPM):
G1 - performed only control supragingival; G2 - performed supra and subgingival control (when
The maintenance consultations will be scheduled every 3 months for 24 months. The hypothesis
is that the effect of the supragingival control (conducted over 24 months) will be similar to
the effect of the supra- and subgingival control combined, above the restoration and
progression of periodontitis.