This study will be conducted to Assess the clinical and microbiological efficacy of chemomechanical caries removal (CarieMove® Gel) versus conventional excavation method in children.

The assessed parameters will be:

• Efficacy of caries removal.
• Pain reaction and mean time required for the treatment.
• Total bacterial count before and after treatment.

Subjects:

A total of 30 children 7-9 years old with no history of systematic disease will be recruited from the out-patient pediatric dental clinic, Faculty of Dentistry, Mansoura University.

Each child with the following criteria will be eligible for the present study (22).

Inclusion criteria:

1. Cooperative child
2. Each child has two bilateral first permanent molars with simple Class 1 occlusal caries involving dentin.
3. The carious first permanent molars are free from clinical and radiographic evidence of pulp involvement.
4. The selected molars should have normal structure and morphology.

Exclusion criteria:

1. Un-cooperative child
2. Molars with clinical and radiographic signs of pulp involvement.
3. Children with special health care needs.
4. Molars which have already been restored or have developmental anomaly.

Inclusion Criteria:

1. Cooperative child
2. Each child has two bilateral first permanent molars with simple Class 1 occlusal caries involving dentin.
3. The carious first permanent molars are free from clinical and radiographic evidence of pulp involvement.
4. The selected molars should have normal structure and morphology.

Exclusion Criteria:

• 1- Un-cooperative child 2- Molars with clinical and radiographic signs of pulp involvement. 3- Children with special health care needs. 4- Molars which have already been restored or have developmental anomaly.