DETERMINANTS OFTOOTH DEVELOPMENT Jumayev Miraziz Makhmudovich

Аннотация

Tooth development is a multifaceted process influenced by genetic, environmental, and socioeconomic factors [8]. Recent studies have highlighted the roles of specific signaling pathways, such as Wnt, BMP, FGF, and Shh, in regulating tooth morphogenesis and mineralization [9]. Environmental stressors, including nutritional deficiencies and exposure to toxins, can disrupt these pathways, leading to developmental anomalies like molar incisor hypomineralization (MIH) [10]. Socioeconomic determinants, such as parental education and income levels, further impact oral health outcomes. This review synthesizes current literature to elucidate thecomplex interplay of thesefactors in toothdevelopment. Keywords: Tooth development, Molar incisor hypomineralization, Signaling pathways, Environmental factors, Socioeconomicdeterminants, Dental anomalies. Introduction. Tooth development, or odontogenesis, is a highly regulated biological process involving intricate interactions between genetic instructions and environmental cues. The formation of teeth is orchestrated by a series of signaling pathways, including Wnt, BMP, FGF, and Shh, which guide the differentiation and proliferation of dental tissues. Disruptions in these pathways can result in various dental anomalies, such as hypodontia, enamel hypoplasia, and molar incisor hypomineralization (MIH). Understanding the factors influencing tooth development is crucial forearly diagnosis, prevention, and management ofdental disorders. Genetic factors play a pivotal role in tooth development. Mutations in genes such as PAX9 and MSX1 have been associated with tooth agenesis and other dental anomalies (Chen et al., 2009). The Wnt/β-catenin pathway, in particular, is essential for early tooth morphogenesis, with its inhibitionleading to arrested tooth development at thebudstage (Andl et al., 2002). Environmental factors significantly impact tooth development. Nutritional deficiencies, particularly in vitamins D and A, and minerals like calcium and phosphorus, can impair enamel formation, leading to conditions such as enamel hypocalcification (Lešić et al., 2024). Exposure to environmental toxins, including excessive fluoride and dioxins, has been linked to developmental defects of enamel (Abanto Alvarez et al., 2009; Frontiers in Pediatrics, 2022). Moreover, systemic illnesses during early childhood, such as high fevers and respiratory diseases, can disrupt enamel mineralizationprocesses (Frontiers in Pediatrics, 2022). Socioeconomicstatus (SES)plays acrucial rolein oral health outcomes. Studies have shownthat lower parental education levels and income are associated with higher prevalence rates of early childhood caries (ECC) and other dental issues (Frontiers in Public Health, 2018). Parental oral health knowledge and attitudes significantly influence children's oral hygiene practices, further affecting tooth development and health. Molar incisor hypomineralization (MIH) is a condition characterized by hypomineralization of the enamel affecting one to four permanent first molars and often associated with permanent incisors. The global prevalence of MIH ranges from 13.1% to 14.2%, with higher rates observed incertain regions such as SouthAmerica and Spain (Zhaoet al., 2018). Children under theage of 10 are more highly affected by the disease (15.1%) compared to older children (12.1%) (Zhao et al., 2018). https://ijmri.de/index.php/jmsi volume 4,issue4,2025 24 Understanding the multifactorial etiology of dental developmental anomalies is essential for developing effective prevention and intervention strategies. This review synthesizes current literature to elucidate the complex interplay of genetic, environmental, and socioeconomic factors intooth development. Methodology. This study employed a comprehensive literature review methodology aimed at synthesizing high-quality scientific evidence regarding the multifactorial influences on tooth development. The methodological framework followed the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) 2020 guidelines to ensure transparency and replicability. 1. Data Sources and Search Strategy. A systematic search was conducted across multiple electronic databases including PubMed, Scopus, Web of Science, and Google Scholar. The search covered studies published from January 2000 to March 2025. Keywords and Boolean operators used in thesearch included:  ("tooth development" OR "odontogenesis") AND  ("genetic factors" OR "signaling pathways" OR "Wnt" OR "BMP" OR "FGF" OR "Shh") AND  ("environmental exposure" OR "nutrition deficiency" OR "fluorosis" OR "toxins")AND  ("socioeconomicstatus" OR "parental education"OR "childhood caries") AND  ("molar incisorhypomineralization"OR "MIH"). Search filters were applied to include only peer-reviewed, full-text articles written in English. Grey literature, dissertations, and non-peer-reviewed conference papers were excluded to maintainmethodological rigor. 2.Inclusionand