RESUMO
Aim: To evaluate the spatial distribution of MIH opacities in first permanent molars (FPM). Materials and methods: an analysis of intraoral photographs of FPM with demarcated MIH opacities was conducted. The presence of opacity was computed in a digital matrix, discriminating the anatomical regions of the FPM surfaces. The frequencies of distribution of the opacities were descriptively analyzed through 227 FPM digital images of 89 children built in GIMP and Python and by Spearman correlation (= 0,05). Results: the occlusal surface was the most affected one (94% to 100%). In the upper FPM, the palatine surface was the second most affected one (84%-91%). In the lower FPM, the vestibular surface was the second most affected one (85%-80%). A similar pattern of opacity distribution was observed in the contralateral teeth. On smooth surfaces, opacities were more frequent in the regions closer to the occlusal surface than to the cervical one. Conclusion: MIH opacities were mostly present on occlusal, vestibular, and lingual/palatine surfaces, respectively. There is a possibility that the occurrences are in accordance with the chronology of dental formation.
RESUMO
AIM: The aim of this study was to compare the caries experience of children with and without molar-incisor hypomineralisation (MIH). METHODS: A case-control study was designed in which 130 children aged between 7 and 13 years with MIH (cases) were matched with 130 children without the condition (controls) according to age, sex, and school. Dental caries and MIH were assessed using the Caries Assessment Spectrum and Treatment (CAST) and European Academy of Paediatric Dentistry (EAPD) criteria, respectively, by three examiners. CAST was converted into DMFT/dmft; the Kruskal-Wallis test was performed to analyse whether dmft/DMFT was influenced by the severity of MIH. Associations between MIH and dental caries were analysed at child and tooth levels: between and within subjects, respectively. To correlate MIH severity and the occurrence of dental caries, the Cochran-Armitage test was used. RESULTS: The mean age of the children was 9.63 ± 1.29 years. The mean dmft for cases was 1.23 ± 1.99 and for controls 1.71 ± 2.22 (p > 0.05). For the DMFT, the mean scores for cases and controls were 0.45 ± 0.90 and 0.07 ± 0.25, respectively (p < 0.001). The between-subject analysis showed no difference in relation to enamel carious lesions; however, the prevalence of dentine carious lesions was significantly higher in children with MIH than in those without the condition. The same pattern was seen for the within-subject analysis. It was observed that the increase in MIH severity resulted in more teeth being affected by dentine carious lesions (p = 0.0003). CONCLUSION: Children with MIH presented a higher experience of caries in the permanent dentition than those without the condition. MIH was considered a risk factor for caries development.
Assuntos
Cárie Dentária/complicações , Cárie Dentária/epidemiologia , Hipoplasia do Esmalte Dentário/complicações , Estudos de Casos e Controles , Criança , Feminino , Humanos , Masculino , Estudos RetrospectivosRESUMO
Introducción: el conocimiento del estado de salud bucal de la población escolar resulta una premisa indispensable para el desarrollo de una correcta planificación, organización y control de la atención estomatológica. Objetivo: determinar el estado de salud de los primeros molares permanentes en estudiantes de la Secundaria Básica “Luis Pérez Lozano”, del Área 7, Cienfuegos, de enero a diciembre de 2015. Materiales y Métodos: estudio observacional-descriptivo en un universo constituido por 197 niños de 7mo grado. El muestreo fue bietápico, combinando aleatorio, estratificado, proporcional y simple. Los datos se obtuvieron a través del examen bucal. Se tuvieron en cuenta las variables edad, sexo, estado de salud, y ubicación de los molares afectados. Resultados: el mayor porcentaje de primeros molares permanentes cariados correspondió al primer molar mandibular derecho e izquierdo para 11,9 % en el sexo masculino y el sexo femenino con primer molar permanente izquierdo para 11,6 %. Las obturaciones de los primeros molares mandibulares izquierdo predominó con un 16,6 % en el masculino y el mandibular derecho con un 13,9 % en las féminas. El mayor número de molares permanentes perdidos resultó en los inferiores, mandibular izquierdo en las niñas para 9,3 % y el molar mandibular derecho en los varones (7,1 %). Ambos sexos igualmente afectados con diferencia porcentual del 1%. El índice de Cluné obtuvo que los molares sanos para el sexo masculino representan 52,3 % y 53,4 % del femenino. Conclusiones: El estado de salud de los primeros molares permanentes en general se clasifica de regular pues existe un número considerable de afectados (AU).
Introduction: the knowledge of the school population´s oral health is a necessary premise for carrying out a correct planning, organization and control of the dental care. Objective: to determine the health status of the first permanent molars in students of the secondary school “Luis Pérez Lozano” of the health area 7, Cienfuegos, from January to December 2015. Materials and methods: an observational, descriptive study applied in a universe of 197 seventh-grade children. The sampling was two-staging, combining the randomized, stratified, proportional and simple sampling. The sample was obtained through the oral examination. The variables taken into account were age, sex, health status, and location of the affected molars. Results: the higher percentage of carious permanent first molars corresponded to the right and left mandibular first molar for 11,9 % in male sex and to the first left permanent molar in female sex with 11,6 %. The fillings of the first left mandibular molars predominated with 16,6 % in the male sex, and the right mandibular one in women with 13,9 %. The highest number of lost permanent molars was found among the lower ones, the left mandibular in girls (9,3 %) and the right mandibular in boys (7,1 %). Both sexes were equally affected, with a 1 % percent difference. The Clune’s index showed that healthy molars are 52,3 % for the male sex and 53,4 % for the female sex. Conclusions: in general, the first permanent molars´ health status is classified as regular because there is a substantial number of carious ones (AU).