Deep marginal elevation usinge a bioactive dental material in deep subgingival Class II restorations, S-PRG filler-containing materials offer significant benefits due to their bioactive properties, Their ability to release fluoride, remineralization potential and acid neutralization, reducing the risk of recurrent caries, particularly at the gingival margin(Imazato et al. 2023). The antibacterial and antifungal effects help inhibit biofilm formation, enhancing the longevity of restorations. Additionally, these materials support better marginal adaptation by reducing microleakage and improving bond durability (Imazato et al. 2023) This type of composite may improve the outcomes of deep subgingival margin elevation, benefiting both restorative success and periodontal health(Imazato et al. 2023).

Inclusion Criteria:

• Adults patients (20-50)
• Good oral hygiene (plaque index 0 or 1 )
• Patient approving to participate in the study
• Absence of parafunctional habits and/or bruxism
• No sign of irreversible pulpitis
• No periapical radiolucency
• Deep subgingival margin
• Molars class II with subgingival margin

Exclusion Criteria:

• • Patients with known allergic or adverse reaction to the tested materials.

  • Systematic disease that may affect participation.
  • Xerostomic patients.
  • Bad oral hygiene (plaque index 2 or 3 )
  • Heavy smokers
  • Patients undergoing or will start orthodontic treatment
  • Patients with removable prothesis