The aim of the present trial is to evaluate the efficacy of PRF with 1% MF in treatment of mandibular class II furcation defects and its comparison to PRF and access therapy alone.

Background: For improving efficacy and outcomes of regenerative therapy for furcation defects, various materials has been investigated in addition to access therapy. Platelet-rich fibrin (PRF) having concentrated growth factors and cytokines and Metformin (MF), an efficacious member of biguanide group are known to enhance periodontal regeneration. The aim of the present trial is to evaluate the efficacy of PRF with 1% MF in treatment of mandibular class II furcation defects and its comparison to PRF and access therapy alone.

Methods: This randomized trial was conducted on 75 patients with mandibular class II furcation defects. Defects were surgically treated with either access therapy alone (Group 1), access therapy+PRF (Group 2), and access therapy+ PRF+1% MF (Group 3). Clinical parameters like probing depth (PD), relative clinical attachment level {vertical (RVCAL) and horizontal (RHCAL)}, modified sulcus bleeding index (mSBI) and site specific plaque index (PI) were evaluated at baseline and 9 months post-operatively. Radiological assessment of bone defect fill was done at baseline and 9 months.

Inclusion Criteria:

• Buccal degree II furcation defects in endodontically vital, asymptomatic mandibular first and second molars with a radiolucency in the furcation area on an intraoral periapical radiograph with probing depth (PD) ≥ 5mm and horizontal ≥ PD 3mm after phase I therapy i.e, scaling and root planing (SRP);
• No history of antibiotic or periodontal therapy in the preceding 6 months.

Exclusion Criteria:

Aggressive periodontitis patients

• Systemic conditions known to affect the periodontal status;
• Medications known to affect the outcomes of periodontal therapy;
• Hematological disorders and insufficient platelet count (<100,000/mm3);
• Pregnancy/lactation;
• Smoking and tobacco use in any form
• Immunocompromised individuals;
• Those having unacceptable oral hygiene (plaque index [PI] >1.5).
• Teeth with furcation involvement, non-vital teeth, and carious teeth indicated for restorations and mobility of at least grade II were also excluded.