The study aim to evaluate the difference between the effect of zinc modified glass ionomer and conventional glass ionomer on the success of partial caries removel technique

The zinc ion has an antibacterial effect which could increase the success of partial caries removel technique by decreasing the bactrial population .

Inclusion Criteria:

1. Male or female (>18 y)
2. patient with At least 1 deep carious lesion
3. Clinical symptoms of reversible pulpitis with positive pulp response

Exclusion Criteria:

• 1. Patient suffer from irreversible pulpitis (pain with hot or instant pain lasting for a while, resistant to analgesic) 2. Presence of any sign of periapical lesion (like sinus tract ) 3. Teeth with periodontal problem 4. Anterior teeth (material used for non aesthetic region) 5. Pregnant women, to avoid multiple exposure to x ray 6. Patients unable to give consent(mentally retarted, or refuse to right a consent)

Outcome assessor and participant will be blinded to the type of material