vitamin D has great role in bone regenration and soft tissue health. in the past periodontal regeneration was performed using bone graft and barrier membrane

there was no previous studies used the locally injected vitamin d in periodontal regeneration. therefore, we intended to study the effect of locally injected vitamin D in peridoontal regerneration in comparison with the conventional surgical technique

Inclusion Criteria:

• patients with infrabony vertical defects
• systemically free patients
• periodontally affected patients

Exclusion Criteria:

• patients with systemic diseases
• smokers
• pregnency