Fig 1.
Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) flow diagram.
Table 1.
Characteristics of the 18 included studies.
Table 2.
Assessment criteria and improvement after PT compared to baseline in prospective studies.
Table 3.
Periodontal criteria and periodontal treatment evaluation after PT in experimental group compared to baseline in prospective studies.
Table 4.
Cochrane risk of bias tool's table (RCT studies).
Table 5.
Newcastle-Ottawa quality assessment scale (studies including control groups).