of this study was to evaluate the behavior of general dental practitioners (GP) and dentists with complementary training in Periodontics (CTP) as to the need of accomplishment of this procedure. A questionnaire was applied to 130 professionals, 29 were returned not completed and then, eliminated of the sample. The results demonstrated that 97% of the CTP professionals performed probing during periodontal evaluation and 49% of the GP do not employ it. Most professionals of both groups provide oral hygiene instructions (92% GP and 91% CTP) and supra and subgingival root planning (72% GP and 91% CTP). The basic periodontal therapy is performed before the restorative treatment by 86% of the GP and 97% of the CTP. As to the period on which periodontal reevaluation was achieved after treatment, 33% of the GP performed this procedure in less than 30 days, from which 65% employed a periodontal probe. In the CTP group, 60% reevaluated the patient after 30 to 45 days and 100% used periodontal probe in this procedure. It is concluded that even though the basic periodontal therapy is properly performed by most professionals, the utilization of a periodontal probe as a diagnostic mean for periodontal diseases is neglected