Developmental Defects of Enamel.

Amelogenesis, the intricate process governing enamel formation, is susceptible to a range of genetic, systemic, and environmental influences, resulting in distinct developmental defects of enamel (DDE), such as molar incisor hypomineralisation (MIH), enamel hypoplasia, dental fluorosis, and amelogenesis imperfecta (AI). This chapter aims to provide a comprehensive overview of amelogenesis and DDE, establishing correlations between histopathological findings and clinical manifestations. MIH, a qualitative enamel defect, occurs during the mineralisation and maturation phases, affecting first permanent molars and eventually incisors. Diagnostic challenges in MIH arise from the disorder's unique features, including variable tooth involvement and severity, influenced by a complex interplay of genetic, systemic, and environmental factors. Enamel hypoplasia, a quantitative defect, manifests in any tooth during enamel matrix secretion. Etiological factors include local, systemic, environmental, and genetic influences, with variable enamel matrix abnormalities depending on the stage of amelogenesis when aggression occurred. Dental fluorosis, a toxicological concern from chronic and excessive fluoride exposure, affects ameloblasts and compromises crystal growth of the homologous teeth during enamel development. Lastly, AI, an inherited condition, encompasses diverse phenotypes in enamel development. AI phenotypes, whether hypoplastic or hypomineralised, entail mutations in genes, such as AMELX, ENAM, MMP20, KLK4, WDR72, FAM83H, C4ORF26, amelotin, GPR68, and ACPT. Diagnosing AI involves considering family history and clinical observation. In conclusion, navigating the intricacies of amelogenesis, from MIH to AI, underscores the critical importance of accurate diagnosis for proper clinical management of DDE.

Dental caries and developmental defects of enamel in cerebral palsy: A meta-analysis.

OBJECTIVE: This systematic review and meta-analysis aimed to compare the occurrence of dental caries and developmental defects of enamel (DDE) in individuals with and without cerebral palsy (CP). MATERIALS AND METHODS: We conducted searches across five databases and the grey literature. Data were organized using EndNote 20. Reporting followed the MOOSE checklist. A random-effects model meta-analyses were conducted using RStudio, presenting results as mean difference (MD), odds ratio (OR), and 95% confidence interval (CI). The risk of bias of studies was analyzed using the Newcastle-Ottawa Scale, and the certainty of evidence was assessed using GRADE. RESULTS: Among 1336 identified records, 25 studies involving 59,997 participants (mean age: 11.1 years) were included. Data of 12 were pooled into meta-analyses. No significant differences were found between CP and non-CP individuals across indices: DMFT (k = 7) (MD = 0.31; 95% CI [-0.42-1.05]), dmft (k = 4) (MD = 0.31; 95% CI [-0.50-1.14]), DMFS (k = 2) (MD = -0.61; 95% CI [-20.56-19.33]), dmfs (k = 3) (MD = 0.54; 95% CI [-1.09-2.17]), and DDE (k = 3) (OR = 0.80, 95% CI [0.09-7.31]). The certainty of evidence was very low. CONCLUSION: Individuals with CP do not appear to differ significantly from those without CP in terms of dental caries experience and DDE.

The prevalence of developmental defects of enamel in people with cystic fibrosis: a systematic review.

BACKGROUND: Oral health impacts systemic health, individual well-being, and quality of life. It is important to identify conditions that may exacerbate oral disease to aid public health and policy development and promote targeted patient treatment strategies. Developmental defects can increase an individual's risk of dental caries, hypersensitivity, premature tooth wear, erosion, and poor aesthetics. As part of an ongoing study assessing oral health in adults with cystic fibrosis at Cork University Dental School and Hospital, a systematic review of available literature was conducted to assess the prevalence of enamel defects in people with cystic fibrosis. AIMS: To critically evaluate the literature to determine if the prevalence of developmental defects of enamel is higher in people with cystic fibrosis (PwCF). METHODS: Data Sources: Three online databases were searched Embase, Scopus, and Web of Science Core Collection. Studies that examined an association between cystic fibrosis and developmental defects of enamel were included in this systematic review. RESULTS: The initial search identified 116 publications from the following databases Embase, Web of Science Core Collection, and Scopus. Eleven studies were included for qualitative analysis. Nine studies concluded that PwCF had a higher prevalence of enamel defects than control people and one study found no difference in cystic fibrosis (CF) status. All studies had a risk of bias that may influence study results and their interpretation. CONCLUSIONS: The results of the systematic review show a consistent pattern that PwCF have a higher prevalence of DDE than people without CF. Genetic dysfunction, chronic systemic infections, and long-term antibiotic use are possible aetiological causes. This review highlights the need for future studies to investigate if DDEs are caused by the underlying CFTR mutation or as a consequence of disease manifestations and/or management.

The prevalence of developmental defects of enamel in a cohort of adults with cystic fibrosis - A cross sectional study.

OBJECTIVES: Cystic Fibrosis is an autosomal recessive condition. It is a multisystem disease treated with a broad range of pharmacological therapies, diet and nutrition, and physiotherapy. Previous studies suggest that people with cystic fibrosis have a higher prevalence of developmental defects of enamel which may place this population at a greater risk of developing oral diseases such as caries. The aim of this study was to assess a cohort of people with cystic fibrosis (PwCF) for the presence of developmental defects of enamel and compare the results with a control group of people without cystic fibrosis. METHODS: A cross sectional study involving 92 participants with cystic fibrosis and 92 controls was conducted in Cork University Dental School & Hospital. All participants completed a detailed questionnaire prior to undergoing a full clinical examination. The Developmental Defect of Enamel Index was used as a measurement index. All data was statistically analysed with the help of statisticians from Cystic Fibrosis Registry of Ireland. RESULTS: 64 % (n = 59) of PwCF had enamel defects compared to just 30 % (n = 28) of people without cystic fibrosis. The median number of teeth affected by enamel defects in the study group was 1.5, compared to 0 in the control group. CONCLUSION: In this study the cohort of PwCF had more enamel defects than people without CF. Further research is required to investigate the aetiology of these findings. CLINICAL SIGNIFICANCE: Clinicians should be vigilant after teeth have erupted in PwCF as they may have an increased susceptibility to developmental defects of enamel.

Natal factors affecting developmental defects of enamel in preterm infants: a prospective cohort study.

This study investigated natal factors influencing developmental defects of enamel (DDE) in premature infants using a newly refined preterm developmental defects of enamel (PDDE) index. Dental examinations were conducted on a cohort of 118 preterm infants (average age 3.5 ± 1.4 years) to record PDDE scores, while reviewing their medical records to examine natal factors. According to the logistic regression analysis, factors related to DDE prevalence were advanced maternal age, gestational age < 28 weeks, birth weight < 1000 g, 1 min APGAR score < 7, and hospitalization period > 2 months, which were significantly higher by 2.91, 5.53, 7.63, 10.02, and 4.0 times, respectively. According to regression analysis with generalized linear models, the PDDE scores were approximately 7.65, 4.96, and 15.0 points higher in premature children diagnosed with bronchopulmonary dysplasia, intraventricular hemorrhage, and necrotizing enterocolitis, respectively. When endotracheal intubation was performed, the PDDE score was 5.06 points higher. The prevalence of PDDE was primarily observed bilaterally in the maxillary anterior teeth. Extremely preterm infants showed significantly delayed tooth eruption, suggesting that the influence of gestational age on dental development rates. Identifying the factors related to DDE in premature children can inform early dental interventions to support the oral health of high-risk children.

Characterization of enamel developmental defects in patients with orofacial clefts and their relationship to surgical procedures.

AIMS: This study aimed to characterize the prevalence of development defects of enamel (DDE) in patients with cleft based on the cleft phenotype and explore the relationship between surgical procedures and different types of DDE. MATERIAL AND METHODS: In this cross-sectional study, 290 standardized orthodontic documentation and medical records from a reference hospital were evaluated, which treated patients with: cleft lip (CL), cleft lip with alveolar bone involvement (CLa), cleft lip and palate (CLP), cleft palate (CP), cleft median (CM), and considering laterality as unilateral or bilateral. DDE was assessed using the Ghanim Index (2015). Information on surgical intervention periods was obtained from medical records. Statistical analyses were performed using prevalence ratio (PR) for DDE comparisons between cleft phenotypes and surgical procedures. RESULTS: The prevalence of DDE was 77.2%. Demarcated hypomineralization was associated with CP and CLP, while hypoplasia was associated with CLa, especially when bilateral. Hypoplasia was also associated with the labial adhesion surgery. CONCLUSION: Demarcated hypomineralization was the most common DDE in this population, and the cleft phenotype influenced the type of DDE manifested. The lip adhesion surgery increased the chances of hypoplasia manifestation. CLINICAL RELEVANCE: The type of DDE in patients with cleft depends on the cleft phenotype. Understanding this susceptibility enables the multidisciplinary team to monitor dental development, thus allowing early diagnosis and timely referral to the pediatric dentist and better prognoses.

Multi-scale characterization of Developmental Defects of Enamel and their clinical significance for diagnosis and treatment.

Developmental Defects of Enamel (DDE) such as Dental Fluorosis (DF) and Molar Incisor Hypomineralization (MIH) are a major public health problem. Their clinical aspects are extremely variable, challenging their early and specific diagnosis and hindering progresses in restorative treatments. Here, a combination of macro-, micro- and nano-scale structural and chemical methods, including, among others, Atom Probe Tomography recently applied on tooth enamel, were used to study and compare MIH, DF and healthy teeth from 89 patients. Globally, we show that DF is characterized by an homogenous loss of mineral content and crystallinity mainly disrupting outside layer of enamel, whereas MIH is associated with localized defects in the depth of enamel where crystalline mineral particles are embedded in an organic phase. Only minor differences in elemental composition of the mineral phase could be detected at the nanoscale such as increased F and Fe content in both severe DDE. We demonstrate that an improved digital color measurement of clinical relevance can discriminate between DF and MIH lesions, both in mild and severe forms. Such discriminating ability was discussed in the light of enamel composition and structure, especially its microstructure, organics presence and metal content (Fe, Zn). Our results offer additional insights on DDE characterization and pathogenesis, highlight the potentiality of colorimetric measurements in their clinical diagnosis and provide leads to improve the performance of minimally invasive restorative strategies. STATEMENT OF SIGNIFICANCE: Developmental Defects of Enamel (DDE) are associated to caries and tooth loose affecting billions of people worldwide. Their precise characterization for adapted minimally invasive care with optimized materials is highly expected. Here In this study, first we propose the use of color parameters measured by a spectrophotometer as a means of differential clinical diagnosis. Second, we have used state-of-the-art techniques to systematically characterize the structure, chemical composition and mechanical optical properties of dental enamel teeth affected by two major DDE, Dental Fluorosis (DF) or Molar Incisor Hypomineralization (MIH). We evidence specific enamel structural and optical features for DF and MIH while chemical modifications of the mineral nanocrystals were mostly correlated with lesion severity. Our results pave the way of the concept of personalized dentistry. In the light of our results, we propose a new means of clinical diagnosis for an adapted and improved restoration protocol for these patients.

Comparison between intraoral scanning and direct visual analysis for the assessment of developmental defects of enamel.

OBJECTIVE: To compare direct visual analysis (DVA) and intraoral scanning (IOS) for the assessment of developmental defects of the enamel (DDE). METHODS: Thirty-nine extracted permanent human teeth with DDE were selected by an experienced examiner and digitised using IOS. The scanning was recorded using the OBS Studio software parallel to the IOS software to obtain a coloured high-definition MP4 file of the process. Two other experienced, blinded, and calibrated examiners randomly analysed the same teeth through DVA and IOS. A third examiner resolved any disagreements between the two examiners. Descriptive statistics were used to analyse the frequencies of the scores. Cohen's kappa test was used to determine whether the DVA scores were different from those assigned using IOS. Spearman's test was used to verify non-random examiner errors. The Chi-square test was used to compare score frequencies. Statistical significance was set at p <0.05. RESULTS: Scores indicating more severe and extended DDE (p <0.05) were more frequently assigned with IOS than with DVA (IOS: 25.64%, 25.64%, 38.46%, and 35.90% between one-third to two-third of the lingual, occlusal, mesial, and distal surfaces, respectively; vs. DVA: 10.26%, 7.69%, 15.38%, and 10.26% for the respective aforementioned tooth surfaces). Contrarily, 'no visible enamel defect' was significantly less assigned for IOS than for DVA (IOS: 15.38%, 43.59%, 35.90%, 15.38%, and 17.95% for buccal, lingual, occlusal, mesial, and distal surfaces, respectively; vs. DVA: 38.46%, 66.67%, 56.41%, 51.28%, and 43.59% for the respective aforementioned tooth surfaces). Kappa agreement ranged from fair to moderate when comparing DVA and IOS; the correlation between both methods was positive, indicating that the examiners assigned the scores properly and the differences arose from employing different methods. CONCLUSION: The assessment of DDE differed depending on the method used. IOS scores indicated more severe and extended DDE than DVA scores. Clinical investigation is the next step in validating the use of IOS for DDE diagnosis. CLINICAL SIGNIFICANCE: This study showed that DDE can be assessed differently using IOS. It is clinically relevant as it directly affects the determination of the severity of the defect and dental treatment planning.

RANTES and developmental defects of enamel in children: A Brazilian prenatal cohort (BRISA).

OBJECTIVE: Little is known about the effect of maternal immunological factors on the etiology of developmental defects of enamel (DDE). RANTES (Regulated on Activation Normal T Cell Expressed and Secreted) is a chemokine produced by fibroblasts, lymphoid and epithelial mucosa cells in response to various external stimuli. Despite its importance for embryogenesis, RANTES expression has been demonstrated in multiple diseases characterized by inflammation, tumor and immune response, and wound healing. We hypothesized that altered levels of RANTES during pregnancy are associated with the immune and inflammatory response in women, which could lead to the occurrence of DDE in utero (DDE-iu), directly or mediated by preterm birth. Therefore, this study aimed to evaluate the direct and indirect effects of serum levels of RANTES in pregnant women in the occurrence of DDE-iu in children. METHODS: This is a longitudinal case-control study. The mothers and their children (327) were evaluated in three moments: prenatal care, post childbirth, and when the child was between 12.3 and 36 months of age. The analysis was performed with structural equation modeling, estimating the standardized coefficient (SC), adopting α = 5%. RESULTS: There was a direct and negative effect of RANTES on the outcome (SC = -0.137; p = 0.022). This association was not mediated by preterm birth (SC = 0.007; P = 0.551). When considering the specific types of DDE-iu, RANTES had a direct effect on hypoplasia (SC = -0.190; p = 0.007), but not on opacity (SC = 0.343; p = 0.074). CONCLUSION: Lower serum levels of RANTES may contribute to a higher number of teeth with DDE-iu, specifically hypoplasia. However, more evidence supported by clinical, laboratory and epidemiological studies is still needed.

Epigenetics in developmental defects of enamel: A scoping review.

OBJECTIVES: The significant role of epigenetics has been revealed in normal enamel formation process and occurrence of developmental defects. This presented literature is aiming at summarizing the regulatory function of epigenetics in physiological amelogenesis process and reviewing the epigenetic mechanisms in occurrence of developmental defects of enamel (DDE), so as to provide biological foundation evidence to support early predication and clinical management of DDE. METHOD: An extensive literature review was conducted using electronic databases MEDLINE (through PubMed), Web of Science and EMBASE up to November 30, 2022. Studies about epigenetic effects on enamel tissue or cells associated with amelogenesis, including in vivo studies using human or animal models, and in vitro studies, are selected. RESULTS: A total of 22 studies were included. Epigenetic factors or effects specifically activate or silence certain genes, which may regulate related biological activities including cell proliferation, cell differentiation, enamel secretion, and mineralization during the process of amelogenesis. Once the status of epigenetic modification is altered, the quantity and quality of enamel may both be disturbed, which can finally result in DDE. CONCLUSION: Epigenetics plays a noteworthy role of regulating the amelogenesis process and DDE potentially by altering the expression levels of genes related to enamel formation, providing a new perspective of early predication and clinical management of DDE.

Prevalence and associated factors of enamel developmental defects among Nigerian children with perinatal HIV exposure.

To evaluate the prevalence and pattern of developmental defects of the enamel (DDE) and their risk factors among children born infected with Human Immunodeficiency Virus (HIV) and those born to HIV-infected mothers compared with their unexposed counterparts (i.e., children born to uninfected mothers). This was an analytic cross-sectional study evaluating the presence and pattern of distribution of DDE in three groups of school-aged children (age, 4-11 years) receiving care and treatment at a Nigerian tertiary hospital, comprising: (1) HIV-infected (HI) on antiretroviral therapy (ART) (n = 184), (2) HIV-exposed but uninfected (HEU) (n = 186) and (3) HIV-unexposed and uninfected (HUU) (n = 184). Data capture forms and questionnaires were used to record the children's medical and dental history based on clinical chart review and recall from their parents/guardians. Dental examinations were performed by calibrated dentists blinded to the study grouping. CD4+ (Cluster of Differentiation) T-cell counts were assayed for all participants. The diagnosis of DDE corresponded with the codes enumerated in the World Dental Federation's modified DDE Index. Analyses relied on comparative statistics to determine risk factors associated with DDE. A total of 103 participants distributed among the three groups presented with at least one form of DDE, which indicated a prevalence of 18.59%. The HI group had the highest frequency of DDE-affected teeth (4.36%), while that of the HEU and HUU groups were 2.73% and 2.05%, respectively. Overall, the most encountered DDE was code 1 (Demarcated Opacity), accounting for 30.93% of all codes. DDE codes 1, 4 and 6 showed significant associations with the HI and HEU groups in both dentitions (p < 0.05). We found no significant association DDE and either very low birth weight or preterm births. A marginal association with CD4+ lymphocyte count was observed in HI participants. DDE is prevalent in school-aged children, and HIV infection is a significant risk factor for hypoplasia, a common form of DDE. Our results were consistent with other research linking controlled HIV (with ART) to oral diseases and reinforce advocacies for public policies targeted at infants exposed/infected perinatally with HIV.

[Epigenetic regulation mechanism: roles in enamel formation and developmental defects of enamel].

Enamel formation is a series of complex physiological processes, which are regulated by critical genes spatially and temporally. These processes involve multiple developmental stages covering ages and are prone to suffer signal interference or gene mutations, ultimately leading to developmental defects of enamel (DDE). Epigenetic modifications have important regulatory roles in gene expression during enarnel development. New technologies including high-throughput sequencing, chromatin immunoprecipitation sequencing (ChIP-seq), and DNA methylation chip are emerging in recent years, making it possible to establish genome-wide epigenetic modification profiles during developmental processes. The regulatory role of epigenetic modification with spatio-temporal pattern, such as DNA methylation, histone modification and non-coding RNA, has significantly expanded our understanding of the regulatory network of enamel formation, providing a new theoretical basis of clinical management and intervention strategy for DDE. The present review briefly describes the enamel formation process of human beings' teeth as well as rodent incisors and summarizes the dynamic characteristics of epigenetic modification during enamel formation. The functions of epigenetic modification in enamel formation and DDE are also emphatically discussed.

Validity of partial protocols to evaluate the prevalence of developmental defects of enamel in permanent dentition: a birth cohort study in Southern Brazil.

OBJECTIVES: To evaluate the validity of partial protocols (PP) to assess the prevalence of developmental defects of enamel (DDE) in permanent teeth and identify the strength of the association between DDE and some risk factors, using PP compared to the full-mouth (FM) exam. MATERIALS AND METHODS: This study was conducted in a population-based birth cohort of children born in 2004 in Pelotas, Southern Brazil. Socioeconomic, demographic, pre-, per-, and post-birth variables were collected. A subsample of 994 children was clinically examined for DDE in 2017, using the modified DDE index, using the "full- mouth" (FM) protocol. After FM had been performed, a dataset was created. Two different partial protocols (PP) were simulated from FM data: "only buccal surfaces (BS)" and "incisive and molars only (IM)." Sensitivity, absolute and relative bias, and inflation factors were calculated. RESULTS: For any DDE, FM had prevalence of 40.8%. The prevalence of DDE was 38.8% and 36.0%, for BS and IM protocols, respectively. When tested for any DDE, PP "BS" and "IM" showed high sensitivity. The underestimation of the true prevalence did not exceed 6.9% for PP "BS" and 16.1% for PP "IM." All protocols showed similar magnitude of association with the selected risk factors. CONCLUSION: Both PP "BS" and "IM" can be used to estimate the prevalence of DDE in epidemiological studies. CLINICAL RELEVANCE: Oral health surveys now have the option of using PP to collect DDE prevalence and investigate their association with risk factors, being less time-consuming, expensive, and labor intensive.

Epigenetic regulation mechanism: roles in enamel formation and developmental defects of enamel / 中华口腔医学杂志

Enamel formation is a series of complex physiological processes, which are regulated by critical genes spatially and temporally. These processes involve multiple developmental stages covering ages and are prone to suffer signal interference or gene mutations, ultimately leading to developmental defects of enamel (DDE). Epigenetic modifications have important regulatory roles in gene expression during enarnel development. New technologies including high-throughput sequencing, chromatin immunoprecipitation sequencing (ChIP-seq), and DNA methylation chip are emerging in recent years, making it possible to establish genome-wide epigenetic modification profiles during developmental processes. The regulatory role of epigenetic modification with spatio-temporal pattern, such as DNA methylation, histone modification and non-coding RNA, has significantly expanded our understanding of the regulatory network of enamel formation, providing a new theoretical basis of clinical management and intervention strategy for DDE. The present review briefly describes the enamel formation process of human beings' teeth as well as rodent incisors and summarizes the dynamic characteristics of epigenetic modification during enamel formation. The functions of epigenetic modification in enamel formation and DDE are also emphatically discussed.

Restauraciones indirectas para el manejo de la Hipomineralización de Molares e Incisivos: un abordaje conservador / Restaurações indiretas para o tratamento da hipomineralização de molares e incisivos: uma abordagem conservadora / Indirect restorations for the management of hypomineralization of molars and incisors: a conservative approach

Introducción: Técnicas adhesivas contemporáneas permiten la rehabilitación conservadora y estética de dientes afectados por caries dental, trauma dentoalveolar y defectos del desarrollo del esmalte. Para el tratamiento restaurador de la hipomineralización de molares e incisivos (HMI) se ha recomendado el uso de restauraciones indirectas. Reporte de caso: Paciente sintomático de sexo femenino, 8 años, portadora de HMI severa y comportamiento levemente negativo. Los dientes 16, 36 y 46 presentaban opacidades demarcadas asociadas a dolor provocado. El tratamiento se enfocó en educar a la familia con respecto a la HMI, orientar el comportamiento, controlar la sintomatología y restaurar la función y estética de los dientes afectados por la HMI. Debido a la extensión, severidad y localización de los defectos en los dientes 16, 36 y 46, se optó por realizar restauraciones indirectas con resina compuesta. Luego de 12 meses la paciente presentaba comportamiento definitivamente positivo, no relataba sintomatología dolorosa, las restauraciones estaban sin cambio de color, bien adaptadas, con buena salud gingival y con adecuada anatomía oclusal, lisas y sin signos de lesiones de caries dental. Conclusión: En este caso de HMI severa, la restauración con resina indirecta fue una estrategia estética, conservadora, viable y efectiva durante un periodo de seguimiento de 12 meses.

Introdução: As técnicas adesivas atuais permitem a reabilitação conservadora e estética de dentes acometidos por cáries, traumas dentoalveolares e defeitos de desenvolvimento do esmalte. Para o tratamento restaurador da hipomineralização de molares e incisivos (HMI), o uso de restaurações indiretas tem sido recomendado. Relato de caso: Paciente do sexo feminino, sintomática, 8 anos, com HMI severa e comportamento levemente negativo. Os dentes 16, 36 e 46 apresentaram opacidades acentuadas associadas à dor provocada. O tratamento teve como foco a educação da família sobre a HMI, orientando o comportamento, controlando os sintomas e restaurando a função e a estética dos dentes afetados pela HMI. Devido à extensão, severidade e localização dos defeitos nos dentes 16, 36 e 46, optou-se pela realização de restaurações indiretas com resina composta. Após 12 meses, a paciente apresentou um comportamento definitivamente positivo, não relatou sintomatologia dolorosa, as restaurações estavam sem alteração de cor, bem adaptadas, com boa saúde gengival e anatomia oclusal adequada, lisas e sem sinais de lesões de cárie. Conclusão: Neste caso de MHI severa, a restauração indireta em resina foi uma estratégia estética, conservadora, viável e eficaz com um período de acompanhamento de 12 meses.

Introduction: Contemporary adhesive techniques allow the conservative and aesthetic rehabilitation of teeth affected by dental caries, dentoalveolar trauma, and enamel development defects. For the restorative treatment of hypomineralization of molars and incisors (HMI), indirect restorations have been recommended. Case report: Symptomatic female patient, 8 years old, with severe HMI and slightly negative behavior. Teeth 16, 36, and 46 presented marked opacities associated with provoked pain. The treatment focused on educating the family regarding the HMI, guiding behavior, controlling the symptoms, and restoring the function and aesthetics of the teeth affected by the HMI. Due to the extension, severity, and location of the defects in teeth 16, 36, and 46, it was decided to perform indirect restorations with composite resin. After 12 months, the patient presented definitively positive behavior, and did not report painful symptoms, the restorations were without color change, well adapted, with good gingival health and adequate occlusal anatomy, smooth and without signs of dental caries lesions. Conclusion: In this case of severe MHI, indirect resin restoration was an esthetic, conservative, viable, and effective strategy during a 12-month follow-up period

Maternal-Child Health Indicators Associated with Developmental Defects of Enamel in Primary Dentition.

Purpose: To assess the prevalence and severity of developmental defects of enamel (DDE) in primary teeth and maternal-associated factors. Methods: This cross-sectional study included 336 two- to four-year-old children who attended the National Day of Children's Vaccination in São Paulo State, Brazil. The modified DDE index was used for diagnosis. Mothers completed sociodemographic and health questionnaires. Descriptive and Poisson regression analyses were performed. Results: The prevalence of DDE was 50.6 percent. The most frequent defects were demarcated opacities (45.0 percent), diffuse (36.0 percent) opacities, and hypoplasia (5.8 percent). White opacities were predominant (64.8 percent) in the teeth with defects, followed by cream (20.4 percent), yellow (5.2 percent), and brown (1.9 percent). Most defects involved less than one-third of the tooth surface (80.2 percent). The prevalence of DDE was associated with maternal-child factors such as alcohol consumption during pregnancy (prevalence ratio [PR] equals 1.27; 95 percent confidence interval [95% CI] equals 1.03 to 1.55), child hospitalization for infectious disease in the first year of life (PR equals 1.32; 95% CI equals 1.05 to 1.67), and breastfeeding for the first 12 months of life (PR equals 0.53; 95% CI equals 0.45 to 0.62). Conclusions: Developmental defects of enamel showed high prevalence and mild severity in the primary dentition. Alcohol consumption during pregnancy and child hospitalization for infectious diseases in the first year of life were associated with an increased prevalence of DDE. Moreover, children who breastfed for 12 months had a lower prevalence of DDE in primary teeth.

Manejo de secuelas de defectos del esmalte en paciente con Síndrome Muenke: Reporte de caso / Management of Sequelae of the enamel defects in patient with Muenke syndrome: Case report / Tratamento de sequelas de defeitos do esmalte em patiente com síndrome Muenke: Relato de caso

El síndrome Muenke se caracteriza por retraso del desarrollo y pérdida auditiva neurosensorial. Personas que presentan síndromes podrían presentar defectos del desarrollo del esmalte. Sin embargo, en personas con síndrome Muenke no existe evidencia sobre la presencia y el manejo de las secuelas de estos defectos. Objetivo: Describir el manejo de secuelas de los defectos del desarrollo del esmalte en dientes primarios con un procedimiento odontológico integral en sala de operaciones de paciente con síndrome Muenke. Caso Clínico: Paciente de 2 años de edad, sexo masculino, con diagnóstico sistémico de Síndrome Muenke y diagnóstico odontológico: fracturas post eruptivas del defecto del esmalte extensión I (< 1/3 del diente) y II (de 1/3 a 2/3 del diente) en los dientes anteroinferiores y fracturas post eruptivas del defecto del esmalte extensión III (> 2/3 del diente) de los dientes 62 y 52. El manejo clínico de estas secuelas, realizadas en sala de operaciones, consistió en: carillas de resina compuestas fotopolimerizable que permitieron restaurar las fracturas post eruptivas de los dientes antero inferiores; y los dientes 62 y 52 fueron rehabilitadas con coronas de resina compuesta fotopolimerizable a mano alzada. Conclusión: El manejo de las secuelas de los defectos de desarrollo del esmalte, en paciente con Síndrome Muenke, se consideró clínicamente positivo; pues después de 6 meses los dientes tratados no presentaron dolor espontáneo, ni se observó fistulas o absceso, ni movilidad dentaria.

O síndrome Muenke é caracterizado por atraso no desenvolvimento e perda auditiva neurossensorial. Pessoas com síndrome podem ter defeitos de desenvolvimento do esmalte. No entanto, em pessoas com síndrome Muenke não há evidências sobre o manejo das sequelas desses defeitos. Objetivo: Descrever o manejo das sequelas de defeitos de desenvolvimento do esmalte em dentes decíduos com um procedimento odontológico abrangente na sala de cirurgia de um paciente com síndrome Muenke. Caso Clínico: Paciente masculino de 2 anos com diagnóstico sistêmico de Síndrome Muenke e diagnóstico dentário: Fraturas pós-eruptivas da extensão do defeito de esmalte I (< 1/3 do dente) e II (1 / 3 - 2/3 do dente) nos dentes anteriores inferiores. e fraturas pós-eruptivas da extensão do defeito de esmalte III (> 2/3 do dente) dos dentes 62 e 52. Os tratamentos realizados foram com resina compostas fotopolimerizáveis que permitiu restaurar as fraturas pós-eruptivas da extensão I e II do defeito do esmalte dos dentes anteriores inferiores. Nos dentes 62 e 52 com fraturas pós-eruptivas do defeito de esmalte de extensão III. foram restauradas com coroas de resina compostas fotopolimerizáveis à mão libre. Conclusão: Os tratamentos foi considerado clinicamente positivo em paciente com Síndrome de Muenke; porque após 6 meses os dentes tratados não apresentavam dor espontânea, nem fístulas ou abscessos, nem mobilidade dentária

Muenke syndrome is characterized by developmental delay and sensorineural hearing loss. People with a syndrome may have enamel development defects. However, in people with Muenke syndrome, there is no evidence on the management of the sequelae of these defects. Objective: To describe the management of sequelae of enamel development defects in the operating room with a comprehensive dental procedure in primary teeth in a single sesión. Clinical case: 2 -year -old, male patient with medical diagnosis: Muenke Syndrome and dental diagnosis: Post eruptive fractures of the enamel defect extensión I (< 1/3 of the tooth) and II (at least 1/3 but less than 2/3 of the affected tooth) in teeth 63, 73, 72,71, 81, 82, 83 and post- eruptive of the extensión III (more than 2/3 of the tooth is affected) enamel defect of teeth 62 and 52, treatment consisted in: veneers that allowed to restore the post eruptive fractures of lower anterior teeth and composite