Study	Reason for exclusion
Bollen 1998	6 out of 16 patients suffering from aggressive periodontitis. Data not shown separately for aggressive and chronic periodontitis
Eren 2002	Patients in the intervention arm received FMS for 4 consecutive days (over 24 hours)
Jothi 2009	No QRP control group
Loggner Graff 2009	Retreatment of patients after 3 months in study prior to outcome assessment at 6 months
Meulman 2013	Data only available as figures. No reply from authors to request for supplemental data
Preus 2013	Participants in all arms received a chlorhexidine rinse
Quirynen 1995	2‐months data only
Serrano 2011	4 to 6 weeks data only
Tomasi 2006	18‐month evaluation after baseline but all patients had several retreatments. These were the same patients as Wennström 2005 but it was an observational follow‐up of the trial
Ushida 2008	Immunology study with no clinical data

FMS: full‐mouth scaling
 QRP: quadrant wise scaling