“A comparison of two different management techniques for extensive molar defects in patients suffering from Molar Incisor Hypomineralization (MIH)” (Randomized Clinical Trial)

Abstract

The molar incisor hypomineralization (MIH) is a type of developmental defects of enamel which affect from one to four of the first permanent molar and commonly associated with the permanent incisors, the affected teeth are characterized by normal thickness of the enamel and demarcated and discolored opacities in the enamel, post eruptive breakdown (PEB) of enamel after eruption, atypical restorations of the affected molars and incisors, extracted molars assumed to be extracted due to MIH and failure of eruption of the affected teeth (26) . The MIH patient seek dental treatment for multiple reasons and Multiple types of full coverage restorations were used to restore badly affected molars with MIH and those crowns were compared with each other and with other types of restorations (81). In this study we compared two different techniques of management of extensive first permanent molar defects in Molar Incisor Hypomineralization patients. The two techniques are two types of full coverage restorations (CAD-CAM milled PMMA versus Cast adhesive Metal Coping). 60 hypomineralized permanent first molar in 20 patients suffering from MIH were selected to share in this study from the out-patient clinic of pedodontics department, Faculty of dentistry, Ain Shams University and randomly divided into two groups: