Active clinical trials for "Amelogenesis Imperfecta"

The study focuses on the analysis of enamel defects grouping together hypomineralization and hypoplasia. It focuses on 3 very characteristic enamel pathologies that are most often encountered in dental consultations: Molar Incisor Hypomineralization (MIH), dental fluorosis (FD) and amelogenesis imperfecta (AI). The research focuses on the use of a spectrophotometer for measuring tooth colors: the Zfx SpectroShade® (MHT) and its software as a means of early diagnosis of pre-eruptive enamel abnormalities. The main objective of the study is to analyze the color parameters of teeth affected with one of the 3 enamel abnormalities for use of the spectrophotometer as a non-invasive diagnostic tool for enamel defects. The secondary objective is focused on the biological, structural and physicochemical characterizations of these different enamel pathologies from extracted teeth or enamel biopsies that must be ground to achieve a restoration.

The purpose of this research is to study the impact of dentinogenesis (DI) and amelogenesis (AI) imperfecta on oral quality of life, exposure to bullying and dental anxiety in a population of adolescents. WThe present study will use validated scales to evaluate the impact of bullying on the oral quality of live of youth aged 10 to 18 years, with non-syndromic DI or AI treated in seven national competence or reference centers in rare oral diseases.

The aim of this study is to investigate whether there is a significant difference in dental age between children with amelogenesis imperfecta (AI) and healthy controls using Willems method, Cameriere European formula and London Atlas. If there is a significant difference in dental age between children with AI and healthy controls, it is aimed to create a new formula.

ExoDent specifically aims to discover new genes and new mutations causing isolated amelogenesis imperfecta (AI) and dentinogenesis imperfecta (DI) and other dentin anomalies. The key point for clinicians is to distinguish between non syndromic and syndromic disorders in order to improve patients guidance and counseling. To do so, two targeted NGS panel have been designed, one searching for isolated AI and the other for DI. After 18 months, some families remain without any positive results. ExoDent project proposes those negative patients a Whole Exome Sequencing (WES) approach to deeper explore their genetic background.

In teeth requiring laminate veneers with amelogenesis imperfecta Will application of galla chinensis before Bonding of laminate veneers with adhesive resin cement provide better survival rate than conventional Bonding method

In AI patients, adhesion still remains the first option in order to achieve an early, minimally invasive intervention, and the altered enamel still represents an acceptable substrate for bonding in some AI variants. Many cases have revealed that the direct composite restorations provide satisfactory esthetic and functionality in restoring AI-affected teeth. The objective of this study was to evaluate the clinical performance of composite restorations in posterior teeth in patients afflicted with Amelogenesis Imperfecta using nanohybrid and nanofill composite materials

Amelogenesis Imperfecta (AI) are a heterogeneous group of rare genetic diseases transmitted according to various mode of inheritance (X-linked, autosomal dominant, autosomal recessive) affecting the formation/mineralization of tooth enamel. These diseases exist in isolation with clinical manifestations limited to the oral cavity or may be associated to other symptoms in syndromes. Many different genes (AMELX, ENAM, ENAMELYSIN or MMP20, KLK4, DLX3, FAM83H, FAM20A WDR72…) coding for enamel matrix proteins, enamel matrix degrading proteins, proteins involved in hydroxyapatite formation and growth and mineralization processes have been discovered responsible for the clinical phenotypes (hypoplastic, hypomineralized, hypomature) encountered in AI. Genes involved in enamel formation but not yet identified in association with any form of AI include: AMELY, AMELOBLASTIN, TUFTELIN, AMELOTIN, A Pin protein, ODAM (Odontogenic ameloblast associated). In this research protocol the investigators explore the phenotype including the enamel ultrastructure and the genotype of a cohort of patients presenting AI.