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Objectives: To decipher and improve the molecular diagnosis of Hypoplastic Amelogenesis Imperfecta in Morocco.
Design: Using whole exome sequencing, we analyzed two Moroccan families with Hypoplastic Amelogenesis Imperfecta. The 2 patients from the first family had dental anomalies and short stature syndrome, brachyolmia and nephrocalcinosis with difference in severity, while the proband of the second family had Hypoplastic Amelogenesis Imperfecta with a suspicion of brachyolmia.
Results: We identified two novel LTBP3 homozygous variants, the c.2495delT deletion (p.Phe832SerfsTer36) and the c.3716 G>A (p.Cys1239Tyr) missense variant, respectively. Molecular modelling and stability analyses of the missense variant disclosed a possible destabilization of the wild-type structure.
Conclusion: Although LTBP3 variants were related to this phenotype in various populations, we report the first LTBP3 variants in the Moroccan population, in families with Hypoplastic Amelogenesis Imperfecta.
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http://dx.doi.org/10.1016/j.archoralbio.2022.105518 | DOI Listing |
J Appl Oral Sci
September 2025
Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Belo Horizonte, MG, Brasil.
Background: Amelogenesis imperfecta (AI) encompasses a group of conditions characterized by abnormalities in the development or function of tooth enamel. Clinical manifestations include different forms and degrees of enamel frailty, associated with sensitivity, tooth fractures, stains, abnormal tooth morphology, missing teeth, etc. AI is genetically heterogeneous, with over 70 genes associated with autosomal dominant, autosomal recessive, X-linked, and oligogenic inheritance.
View Article and Find Full Text PDFGenes (Basel)
July 2025
Clinical Institute of Special Laboratory Diagnostic, University Children's Hospital, 1000 Ljubljana, Slovenia.
Amelogenesis imperfecta (AI) represents a heterogeneous group of inherited disorders affecting the quality and quantity of dental enamel, making clinical diagnosis challenging. This study aimed to identify genetic variants in Slovenian patients with non-syndromic AI and to evaluate enamel morphology using radiographic parameters. Whole exome sequencing (WES) was performed on 24 AI patients and their families.
View Article and Find Full Text PDFJ Prosthet Dent
July 2025
Professor, Prosthodontic Department, University of São Paulo (USP), São Paulo, Brazil.
Amelogenesis imperfecta (AI) is a heterogeneous condition that affects enamel formation, leading to dental challenges such as yellowish stains, tooth sensitivity, and severe occlusal wear that may lead to loss of occlusal vertical dimension (OVD). OVD must be carefully assessed before definitive intervention and reestablished with interim devices. Restorative options include computer-aided design and computer-aided manufacturing (CAD-CAM) polymethyl methacrylate (PMMA), a long-term material that is gaining recognition for its durability and cost-effectiveness.
View Article and Find Full Text PDFInt Dent J
July 2025
Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Santiago, Chile. Electronic address:
Objective: Diseases that affect teeth can change their structure and the distribution and expression of amelogenin (AMELX) and dentin-sialophosphoprotein (DSPP). This study aimed to conduct a histopathological, ultrastructural, and immunohistochemical comparison of AMELX and DSPP in teeth from patients with amelogenesis imperfecta (AI), dentinogenesis imperfecta (DI), osteogenesis imperfecta (OI), regional odontodysplasia (ROD), and control teeth. Additionally, a model of the structure of the affected primary teeth is proposed.
View Article and Find Full Text PDFBMC Pediatr
July 2025
Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya, 2210001, Israel.
Background: Kohlschutter-Tonz syndrome (KTSZ) is a rare, autosomal recessive neurodegenerative disorder. Patients suffer from a triad of developmental delays, epilepsy, and amelogenesis imperfecta (AI). Most reports of KTSZ patients focus on the genetic pattern of the disease and medical features, dental care is not considered a primary part of the initial intervention.
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