The present study will be performed to evaluate:

The remineralizing effect of Aloe Vera versus Diode laser on deep carious dentin after selective caries removal.

This study was conducted on 45 teeth selected from patients according to inclusion and exclusion criteria. They were selected from the dental clinic in faculty of oral and dental medicine for girls, Al-Azhar University. The procedure was explained and written informed consent was obtained from each patient. The possible discomforts, risks, and benefits were fully explained to the patients. Ethical committee approval was obtained.

Protocol of caries removal was Applied Subsequently, the central cariogenic biomasses and superficial part of the necrotic and demineralized dentin was excavated, leaving the leathery dentin layer.

Sample grouping:

The patients were randomly assigned into three main groups according to the material used (15 for each) which were assessed at different time intervals (B1) after three months,(B2) after six months.

A1: cavities will be sealed directly by temporary restorative material (conventional glass ionomer) without any treatment.

A2: cavities will be treated by Diode laser then sealed directly by temporary conventional glass ionomer.

A3: cavities will be treated with Aloe Vera then sealed directly by temporary conventional glass ionomer.

Evaluation of the remineralization effect of Each group will be assessed radiographically immediately at base line (B0), after three months (B1) and six months (B2) to evaluate the dentin remineralization.

Inclusion Criteria:

• Subject must have active deep carious lesion.
• clinical and radiographic examinations of carious lesions.

Exclusion Criteria:

• Teeth with pulpal involvement
• Teeth with abscess
• Teeth with pain or swelling
• Teeth with developmental disorders
• Teeth with adjacent soft tissue lesions
• patients with systemic illness will be excluded