NCT01291875.

Trial name or title	Periodontal treatment and metabolic control in type 2 diabetic patients
Methods	2‐arm RCT
Participants	732 type 2 DM patients with severe periodontitis
Interventions	Comparison: SRP versus mechanical debridement Gp A: SRP under local analgesia (depending on the severity in 1 session or 2 sessions within 2 days) + extraction of indicated hopeless teeth + additional SRP where necessary at follow‐up Gp B: "Supragingival biofilm control": supragingival mechanical instrumentation/polishing using hand and machine driven (piezoelectric) instrumentation
Outcomes	Primary: HbA1c (at 2, 6, 12 months). Others unknown
Starting date	February 2011
Contact information	Hilana Artese: hilanartese@gmail.com; Giuseppe Romito: garomito@usp.br
Notes	Emailed Drs Artese and Romito to check if trial completed/obtain unpublished results, but no response