Knowledge of Dentists about Hypomineralization Enamel Defects: A Cross-Sectional Study

ABSTRACT Objective: To evaluate a group of Brazilian dentists on their knowledge of Molar Incisor Hypomineralization (MIH) and Hypomineralized Second Primary Molars (HSPM) related to clinical aspects, consequences, and diagnostic criteria. Material and Methods: In this cross-sectional, the participants were invited by e-mail and Whatsapp® to answer a questionnaire about their knowledge of hypomineralization enamel defects (MIH/HSPM) on the Google Forms® platform. The questionnaire comprised eight questions about personal data and multiple-choice questions about their knowledge concerning clinical aspects, diagnostic criteria of MIH/HSPM and differential diagnosis through clinical images. Chi-square test was applied with the significance level set at 5%. Results: Most participants (n = 492; 91.1%) reported having knowledge about MIH/HSPM. The general dentists gave more incorrect answers (n = 40; 65.6 %;) about dental tissues affected by MIH/HSPM. Overall, 83.3% of the dentists gave the correct answer to which dentitions are associated with this condition. In addition, most dentists presented knowledge about the consequences related to possible fractures (n= 487; 90.2%) and about an increased risk of caries (n= 479; 88.9%) in the affected teeth. Regarding the differential diagnosis performed through clinical images, most participants gave incorrect answers (p≤0.001). Conclusion: The participants presented knowledge about the dentition associated with this condition and possible consequences related to the teeth affected by MIH/HSPM; however, they showed difficulties concerning clinical diagnostic criteria.

Dentists' Knowledge and Clinical Experience towards Molar-Incisor-Hypomineralization in Iran

ABSTRACT Objective: To determine the knowledge and clinical experience of dentists regarding MIH in Kerman/Iran. Material and Methods: In this cross-sectional study, a census sampling method was used, and all dentists registered in Kerman medical council were asked to participate in the study. A validated and reliable researcher administered questionnaire was used to determine participants' demographic characteristics, knowledge, and clinical experience. The association between knowledge score and demographic variables was determined using an independent t-test and ANOVA. The level of significance was set as 0.05. Results: Overall, 400 specialized and general dentists in Kerman completed the questionnaire. The mean knowledge score of dentists was 6.6±1.9 of 11. Female dentists' knowledge was higher than male dentists (p<0.05). General dentists had a higher level of knowledge regarding MIH compared to specialists (p<0.05). Overall, 79.5 % had been faced with MIH during their practice years. After confronting MIH teeth, 48.8% of dentists referred patients to specialists for treatment. Providing aesthetics was considered the most difficult part of treatment (43.2%). Resin composite was the most favorable dental material for treating MIH (60.9%). Conclusion: Although most dentists in Kerman had encountered MIH defects during their clinical practice, they did not have enough knowledge of the defect and required education on all aspects of MIH diagnosis and management. Younger dental practitioners, general dentists and females presented higher knowledge of MIH.

Prevalence of Molar Incisor Hypomineralisation Among School Children aged 7-12 years in Tunis, Tunisia

Abstract Objective: To evaluate the prevalence and the characteristics of Molar Incisor Hypomineralisation (MIH) in 7-12-year-old children in Tunis, Tunisia. Material and Methods: This study was designed as a cross-sectional study, in which school children aged 7 to 12 years were included. A total of 510 children (257 girls and 253 boys) who had their first permanent molar and incisors were evaluated using the 2003 European Academy of Paediatric Dentistry (EAPD) recommendation criteria were examined. Descriptive data analysis and Pearson's chi-squared test were performed (p<0.05). Results: A total of 510 children were included in the study. MIH was present in 35.4 % of our study population. Boys exhibited slightly higher MIH (19,4%) and Post Eruptive Breakdown (PEB) (7,3%) prevalence compared to girls, but the difference was not statistically significant (p=0.07). Moreover, demarcated opacities were more prevalent than PEB. More precisely, the main prevalence without PEB was MIH with white/creamy demarcated opacities, which was more frequent than yellow/brown demarcated opacities (p<0.05). Conclusion: The prevalence of MIH in Tunis was 35.4%, with no difference between girls and boys. The main MIH type prevalence was white/creamy demarcated opacities without PEB.

Prevalence and Severity of Dental Caries and Fluorosis in 8 Year-old Children With or Without Fluoride Supplementation / Prevalencia y Severidad de Caries Dental y Fluorosis en Niños de 8 Años con o Sin Suplementos de Flúor

ABSTRACT: One of the most effective and studied measures in the prevention of caries is the use of fluoride, which has the property to reduce their incidence and severity. In Chile, 75 % of the population receives it the drinking water. In 1984, WHO recommended the use of milk as an alternative vehicle. In Chile, the Fluoridated School Feeding Program (FSFP) was introduced in 1994, using this alternative in rural areas without fluoride in water. The objective of the study was to compare prevalence and severity of dental caries and dental fluorosis in 8-year-old children of four state schools: two with fluoride supplementation in drinking water or milk and two without any fluoride program. Epidemiological, descriptive, comparative, observational and cross-sectional study with a sample of 140 8-year-old children, with no systemic diseases and who had lived in the same place since birth: 50 schoolchildren from an area with fluoridated water; 40 from an area with fluoridated milk and 50 from a zone without supplementation of F. The percentage of caries-free children was obtained with the methodology described by the WHO, for severity the dmft and DMFT indexes were used. To quantify the prevalence and severity of dental fluorosis, Dean Index was used. 38 % of the children were caries-free in the community with fluoridated water (CFW); 0 % in the community with fluoridated milk (FSFP) and 10 % in the community with no fluoride program established (CNF). The difference between CFW with CNF is statistically significant (p<0.05). The prevalence of fluorosis is significantly higher for CFW (48.8 %) than FSFP (35 %) and CNF (16 %). Conclusion: The contribution of fluoride in drinking water causes a decrease in the prevalence and severity of dental caries in children of 8 years of age, and an increase in the prevalence of dental fluorosis.

RESUMEN: Una de las medidas más efectivas y estudiadas en la prevención de caries es el uso de fluoruros, que tiene la propiedad de reducir su incidencia y severidad. 75 % de la población chilena lo recibe al incluirlo en el agua potable. La OMS en 1984 recomendó el uso de leche como un vehículo alternativo. En Chile, el Programa de Alimentación Escolar con leche fluorada fue implementado en 1994 como alternativa en zonas rurales sin fluoruro en el agua. El objetivo de este estudio fue comparar la prevalencia y severidad de la caries dental y la fluorosis dental en niños de 8 años en tres escuelas públicas, con suplementación de fluoruro en el agua potable o en la leche y con aquella que no tiene ningún programa de fluoración. Estudio epidemiológico, descriptivo, comparativo, observacional y de corte transversal con una muestra de 140 niños de 8 años, sin enfermedades sistémicas y que han vivido en el mismo lugar desde su nacimiento: 50 escolares en el área con agua fluorada, 40 en el área con leche fluorada y 50 en la zona sin suplementación de fluoruro. El porcentaje de niños libres de caries fue obtenido con la metodología descrita por la OMS, usando índices ceo-d y CPO-D para evaluar severidad. Para cuantificar la prevalencia y severidad de la fluorosis dental se ocupó el índice de Dean. Niños libres de caries fueron 38 % en la comunidad con agua fluorada (CWF); 0 % en la comunidad con leche fluorada (FSFP) y 10 % en la comunidad sin programa de fluoración (CNF). La diferencia entre CWF y CNF es estadísticamente significativa (p<0,05). La prevalencia de fluorosis es significativamente mayor en CWF (48,8 %) que FSFP (35 %) y CNF (16 %). La contribución del fluoruro en el agua potable causa una disminución en la prevalencia y severidad de la caries dental en niños de 8 años, y un aumento en la prevalencia de fluorosis dental.

Demarcated opacity in primary teeth increases the prevalence of molar incisor hypomineralization

Abstract This cross-sectional study aimed to assess the prevalence of molar incisor hypomineralization (MIH) and its relationship with the number of primary teeth with developmental defects of enamel (DDE). A representative population-based sample of 731 schoolchildren was randomly selected from the public school system in Curitiba, Brazil. Schoolchildren aged 8 years with fully erupted permanent first molars and incisors were eligible for the study. MIH and DDE were classified by four calibrated examiners (kappa > 0.75) according to EAPD criteria and to the FDI-modified DDE index. Clinical data were collected in a school environment. Socioeconomic information was collected through a self-administered semistructured questionnaire applied to the children's caregivers. Statistical analyses were carried out using Poisson multiple regression with robust variance (α = 0.05). MIH prevalence was 12.1% (95%CI: 10-15), and opacities were the most prevalent defect. Socioeconomic factors were not associated with MIH. Children with demarcated opacity in primary teeth presented a higher prevalence of MIH than those without DDE in primary teeth. In the multiple analysis, the increase of one primary tooth affected by demarcated opacity increased the prevalence of MIH by 33% (PR = 1.33, 95%CI: 1.15-1.53, p < 0.001). Asian children had a higher prevalence of MIH (PR = 2.91, 95%CI: 1.08-8.09 p = 0.035) than did Caucasian children.Conclusion: Based on these findings, the prevalence of MIH in Curitiba was 12.1%. Demarcated opacity in primary teeth could be considered a predictor of MIH.

Association Between Presence of Enamel Defects, Dental Caries and Socioeconomic Conditions on Brazilian Children

Objective: To verify the relationship between developmental enamel defects (DED) in permanent incisors and socioeconomic conditions and dental caries in children within the life course context. Material and Methods: A total of 350 children aged 9-11 years from 13 public schools in the city of Bauru, Brazil were examined. Clinical exams were performed to observe the presence of caries and developmental enamel defects using the DMFT and DED indexes, respectively. In addition, information about family income and parental schooling was collected. Statistical analysis used the Spearman Correlation Coefficient and the Chi-square test to verify the association between DED, socioeconomic conditions and dental caries. The significance level adopted was 5%. Results: Association between presence of dental caries and DED (p=0.04), delimited opacity (p=0.02) and opacity (p=0.01) was observed. Inverse correlation for the decayed component with maternal schooling and family income was also verified. Regarding the types of development enamel defect (DED), correlation between delimited opacity, opacity and DED with the DMFT index was observed. Conclusion: The results of this study indicated association between enamel defects and caries, as well as correlation between income and parental schooling and dental caries.

Molar-Incisor Hypomineralization in Schoolchildren of São Luis, BrazilMaranhão: Prevalence and Associated Factors

To determine the prevalence of molar-incisor hypomineralization (MIH) in the permanent dentition and assess the factors associated with these change in schoolchildren of São Luís, Brazil.Material and Methods:Overall, 1179 students aged 7-14 years of both sexes were included, all with permanent first molars and incisors erupted in the oral cavity. Oral clinical examination to assess the prevalence of HMI was held at school, under natural light. In the second stage, to assess factors associated with HMI, a case-control study was conducted, in which cases were children diagnosed with HMI (n = 14) and as controls, the schoolchildÆs brother (family control, n = 10 ) and another schoolchild in the same age group bornin the same locality (community control, n = 14). A semistructured questionnaire was completed by mothers to identify possible factors associated with HMI, such as maternal education, family income, data from pregnancy and childÆs medical history in the first three years of life. Logistic regression analysis was used to estimate odds ratios (Odds Ratio -OR) and their confidence intervals at 95% (CI 95%) to assess crude and adjusted associations for confounders.Results:A prevalence of 2.5% of HMI was estimated. No association was found for the etiologic factors surveyed.Conclusion:The prevalence of HMI was lower than that reported in other cities in Brazil, but similar to data from other countries. At the difficulty and complexity in establishing the etiologic factors of HMI, cohort studies are required to clarify this change...

Orodental findings in Hallermann-Streiff syndrome.

Hallermann-Streiff syndrome-also called occulomandibulofacial syndrome, Francois syndrome, oculomandibulodyscephaly with hypotrichosis, Aubry syndrome I, and Ullrich-Fremery-Dohna syndrome-is a rare genetic disorder, which comprisesmultiple congenital abnormalities affecting chiefly the head and face. It is characterized by bird-like facies, dental abnormalities, hypotrichosis, atrophy of skin, congenital cataracts, bilateral microphthalmia, and proportionate nanism. An interesting case of Hallermann-Streiff syndrome in a 23-year-old female patient is reported here, with the emphasis on the orodental findings.

Prevalencia de hipomineralización inciso-molar en niños nacidos en diferentes lugares de la República Argentina / Prevalence of molar incisor hypomineralization in children born in different places of the Argentine Republic

En el año 2003 fue aceptada la terminología hipomineralización inciso-molar (HIM) por la Academia Europea de Odontopediatría, para definir esta patología de etiología aún desconocida que afecta a los primeros molares permanentes y en ocasiones a los incisivos. El objetivo del presente trabajo fue estimar la prevalencia de HIM en niños de diferentes regiones de la República Argentina, asociando posibles factores ante su aparición. Materiales y métodos: fueron examinados 411 niños de ambos secos con edades entre 7 y 13 años (media= 9.66 +-1.5) en centros odontológicos de diferentes localidades argentinas. Se registraron datos relacionados con su aparición, gravedad y severidad. Se analizó estadísticamente asociación y correlación. Resultados: la prevalencia de HIM fue 25,1 por ciento en molares y 18,7 por ciento en molares e incisivos. Se encontró asociación significativa entre antibiótico administrados durante el embarazo e HIM y entre otitis padeciad por los niños e HIM. Conclusión: el alto porcentaje hallado en este trabajo determina que la HIM es una patología que se encuentra presente en nuestro país.

Aspectos odontológicos en paciente portador del síndrome de Mobius: relato de caso / Dental aspects of a patient with Mobius syndrome: case report

El síndrome de Mobius se caracteriza por la parálisis congénita y no progresiva de los nervios craneanos facial y abducentes cuyas manifestaciones clínicas principales son la apariencia facial estática y poco expresiva, el estrabismo bilateral convergente y la hipoplasia de miembros, entre otras. En la cavidad bucal puede observarse micrognacia, implantación heterotrófica de la lengua, anquiloglosia, úvula bífida, fisura palatina y anomalías dentales. La etiología del síndrome de Mobius es poco conocida y algunos relatos de la literatura señalan, como la hipótesis más probable, una isquemia fetal transitoria, durante el período de formación de los núcleos craneanos. Los posibles factores causales de esta isquemia serian los de orden ambiental, los disturbios fisiopatológicos y genéticos, o el uso ilícito de drogas como el Misoprostol, durante la gestación. El presente trabajo relata el tratamiento odontológico realizado en una paciente portadora de este síndrome enfatizando las particularidades observadas durante la atención, en función de las características propias de esa entidad clínica

Mobius syndrome is characterized by congenital and non-progressive paralysis of the facial and abducent cranial nerves. The principal manifestations of this syndrome are lack of facial expression, convergent bilateral strabismus and hypoplastic members. The oral findings include micrognatia, heterotrophic implantation of the tongue, ankyloglossia, bifid uvula, cleft palate and dental anomalies. The etiology of Mobius syndrome is unknown and some reports relate, as a main cause, the transitory fetal ischemia during the formation of cranial nucleus. The factors that lead to this ischemia are from ambient, physiopathological or genetic disturbs and use of drugs like Misoprostol during the pregnancy. This paper reports the dental treatment of a female patient with Mobius syndrome, emphasizing the peculiarities observed due to the characteristics of this clinical entity

Enamel hypoplasia in a litter of rats with alloxan-induced diabetes mellitus

Enamel hypoplasia is an important clinical problem commonly seen in children born to diabetic women. We aimed to characterize the enamel hypoplasia in Wistar rats born to alloxan-induced diabetes mellitus rats. Groups consisted of pregnant rats supplemented (ISDR) or not (NISDR) with insulin and controls, in which sterile saline solution was administered instead of alloxan or insulin. The mandibular incisors of one-month-old rats born to these mothers were analyzed. Whitish defective enamel was found macroscopically in both experimental groups (ISDR = 37.5 percent, NISDR = 33.3 percent) but not in the control group. Mild to severe enamel hypoplasia was observed by scanning electron microscopy (ISDR = 93.8 percent; NISDR = 100 percent, control = 4.2 percent). The severity of hypoplasia correlated positively with the maternal level of blood glucose. In conclusion, the intensity of enamel hypoplasia in the teeth of the litter born to alloxan-induced diabetic rats was variable and was dependent on the glycemic level of the pregnant rat

Hipoplasia del esmalte / Enamel hypoplasia

En el presente trabajo, realizado entre octubre-noviembre de 1995, en el Hospital Bollini de La Plata, se estudió una población de 475 niños, de los cuales el 20 por ciento presentaba hipoplasia adamantina. Se registraron los pacientes con lesiones, confeccionando una historia clínica y se investigó la literatura. Se tomó como parámetro pacientes con esmalte normal, para luego definir la hipoplasia, clasificarla, determinar los aspectos histológicos, clínicos, algunas modalidades de tratamiento, dejando constancia en la conclusión de los puntos con mayor interés. 1. Es una alteración en la formación de la matriz orgánica. 2. Sólo se produce si la lesión ocurre durante la etapa de formación. 3. Hay dos tipos: hereditaria y ambiental. 4. Clínicamente son similares, la diferenciación es histológica. 5. El tratamiento no varína con respecto a un diente con esmalte normal, dependiendo del caso: a) Tratamiento correctivo estético, b) tratamiento radical (exodoncia), c) Tratamiento preventivo: educar para la salud

Amelogenésis imperfecta, tipo hipoplásica: informe de una familia / Imperfect amelogenesis, hypoplastic type: family report

Se presenta una familia, en la cual algunos de sus miembros son afectados por amelogenésis imperfecta. Se efectúa un estudio clínico y anátomo-patológico con microscopio electrónico de barrido de uno de sus integrantes. La AI es una enfermedad que afecta tanto la formación como la maduración normal del esmalte cuyo origen es hereditario