Assesment of the prevalence of molar incisor hypomineralization among a group of egyptian children aged from 8 to 12 years old in Damietta governate. This study will determine the severity of molar incisor hypomineralization which will help in its managment ,also will increase the awareness pf pediatric dentists about the prevalence of molar incisor hypomineralization in Egyptian children.Also it will allow the early detection of molar incisor hypomineralization which will make the parents seek early treatment for it. Participants fromprimary schools in Damietta governate will be included in the study. Clinica examination will be carried out in the school lab or in embty class, in day light.

Inclusion Criteria:

• positive subject acceptence for participation in the study.
• children aged from 8 to 12 years old.
• Eruption of at least two first permanent molars.
• Both genders.

Exclusion Criteria:

• Uncooperative child.
• Children with prthodontic appliances.
• Children with systemic diseases.
• Children suffering from any other type of enamel defect as enamel hypoplasia.

A group of Egyptian children aged from 8 to 12 years old in Damietta governate.