* Determine the prevalence of molar incisor hypomineralization among a group of children with type I diabetes millutes, its severity and treatment need via clinical examination of children with type I diabetes millutes . * Teeth will be cleaned gently using gauze and wet with saliva during examination. A disposable diagnostic set (mirror, probe) will be used for each patient where mirrors will be used for proper visualization especially for maxillary teeth. * Blunt explorers will be used to aid in tactile sensation if needed, as during the differentiation between rough and smooth enamel edges and/or during the inspection of the caries extent if it exists. No diagnostic radiographs will be taken. * The severity and treatment needs of each case with MIH will be recorded in patient's chart. * The results of the study will be regularly monitored by the supervisors who will have full access to these results.
Patient aged 8 to 14 years and diagnosed with types I diabetes milletus.
Eruption of all 4 first permanent molars.
Acceptance to participate.
Presence of orthodontic appliance.
Patient with any other type of enamel defect.
Patients with any other systemic conditions rather than types I diabetes milletus that may affect tooth development.