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The purpose

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 necessary). 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.

Provided treatments

  • Procedure: Group 1 - Supragingival biofilm control
  • Procedure: Group 2 - Supra- and subgingival biofilm control
Tris trial is registered with FDA with number: NCT01598155. The sponsor of the trial is Federal University of Rio Grande do Sul and it is looking for 70 volunteers for the current phase.
Official trial title:
The Effect of Supragingival Biofilm Control, and the Combination of Supra and Subgingival Biofilm Control in Periodontal Health of Patients Participating in a Periodontal Preventive Maintenance Program - A Randomized Clinical Trial.