Inclusion criteria:  Children:  Good general health and medically free patients. Age ranges: from 4-7 years old. A provided informed consent by the parents. Acceptable child cooperation.  Teeth:  Class I carious primary teeth. 2 contralateral or adjacent carious teeth. Simple caries, extending to the dentin. No singe or symptom of pulp inflammation. Normal radiographic examination.  Exclusion Criteria:  Children:  Unable to attend follow-up visits. Refusal of participation.  Teeth:  Symptom tooth. Periapical Pathosis. Mobile primary tooth.