ABSTRACT
Introducción: las fosas y fisuras son áreas formadas por delgadas irregularidades de la capa del esmalte de la superficie oclusal. La compleja morfología en dientes posteriores es un determinante biológico asociado al desarrollo de caries. Objetivo: evaluar el efecto de diversas formas de tratar la morfología oclusal en la adaptación y penetración de materiales utilizados en restauraciones preventivas. Material y métodos: diseño experimental e in vitro. Sesenta terceros molares fueron distribuidos aleatoriamente en dos grupos: surco sin ameloplastia y con ameloplastia; además, contaban con acondicionamiento del esmalte que se subdividió en tres subgrupos: 1) sellador de fosas y fisuras, 2) adhesivo/sellador de fosas y fisuras y 3) adhesivo/ resina Flow. Resultados: los subgrupos adhesivo/sellador y adhesivo/ Flow alcanzaron mayores valores de adaptación íntima a las paredes del surco. Las diferencias fueron significativas entre los materiales (p = 0.0009). Las mayores zonas de desadaptación resultaron para el sellador sin y con ameloplastia. La penetración de los materiales fue mayor en los surcos con ameloplastia. En los surcos tratados con ameloplastia, el adhesivo/Flow reveló el mayor porcentaje de penetración y la mejor adaptación a las paredes del surco. Conclusiones: la penetración del material está positivamente correlacionada con la profundidad del surco. El sellador con y sin ameloplastia mostró pobre adaptación a las paredes del surco (AU)
Introduction: pits and fissures are areas formed by fine irregularities in the enamel layer of the occlusal surface. The complex morphology in posterior teeth are biological determinants associated with the development of caries. Objective: to evaluate the effect of various ways of treating occlusal morphology on the adaptation and penetration of materials used in preventive restorations. Material and methods: experimental design, in vitro. Sixty third molars were randomly distributed into two groups: groove without ameloplasty and with ameloplasty, with enamel conditioning with three subgroups: 1) pit and fissure sealer, 2) adhesive/pit and fissure sealer, 3) adhesive/resin flow. Results: the adhesive/sealant and adhesive/flow subgroups reached higher values of intimate adaptation to the furrow walls. The differences were significant between the materials (p = 0.0009). The largest areas of maladjustment were found for the sealant without and with ameloplasty. The penetration of the materials was greater in the grooves with ameloplasty. In the grooves treated with ameloplasty, the adhesive/flow revealed the highest percentage of penetration and the best adaptation to the walls of the groove. Conclusions: the penetration of the material is positively correlated with the depth of the furrow. The sealant with and without ameloplasty showed poor adaptation to the sulcus walls (AU)
Subject(s)
Pit and Fissure Sealants/therapeutic use , Preventive Dentistry/methods , Composite Resins/therapeutic use , Acid Etching, Dental/methods , In Vitro Techniques , Dental Bonding/instrumentation , Dental Restoration, Permanent , Molar, Third/anatomy & histologyABSTRACT
En la literatura existen reportes sobre las diversas formas de las fosas y fisuras demolares permanentes y premolares. Se conocen las características de éstas y se da por hecho que las estructuras dentales son semejantes en ambas denticiones. Por lo que es necesario abordar el estudio de las características del esmalte de la dentición temporal. Objetivo: Cuantificar la frecuencia de cada forma y profundidad de fosas y fisuras de molares temporales de la clasificación de Nagano. Material y métodos: En un estudio observacional descriptivo ex vivo se analizó una muestra obenida por donación de 101 cortes correspondientes a 67 coronas de molares temporales sin cariesconservadas en agua destilada, pertenecientes a niños mexicanos aparentemente sanos. Las va riables forma y profundidad se identificaron al microscopio estereoscópico por un solo observador (k=.8624). El grosor de los cortes obtenidos por el método de desgaste midieron en promedio 5mm. Resultados: El 28.71% de las fosas y fisuras identificadas corresponden al grupo 5 Características de las otras formas de Nagano de fosas y fisuras de molares temporales Features of other shapes of Nagano of pit and fissures in primary molars Artículo Original Esther Vaillard Jiménez 1 Enrique E.Huitzil Muñoz Aída Ortega Cambranis 3 S. Abril García Damián 41 Maestra en Estomatología Pediátrica. FEBUAP (México) 2 Maestro en Educación Superior. FEBUAP (México) 3 Maestra en Fisiología. FEBUAP (México) 4 Alumna egresada de la Maestría en Cs estomatológicas en Pediátrica Facultad de Estomatología de la Benemérita Universidad Autónoma de Puebla.
In literature there are reports on the various forms of pits and fissures of permanent molars and pre molars. Their characteristics are known and it is assumed that dental structures are similar in both dentitions. So it is necessary to approach the study of the characteristics of the enamel in primary teeth. Objective: to quantify the frequency of each shape and depth of pits and fissures of molars under the Nagano classification. Material and methods: in an ex vivo observational study a sample obtained by donation of 101 courts to 67 crowns for primary molars without decay preserved in distilled ware is analyzed, this sample belongs to Mexican children with an apparent healthy shape and depth, variables were identified under the stereomicroscope by a single observer (k=8624) The thickness of the slices obtained by the method of wear measured on average o.5 mm. Results: 28.71% of the pits and fissures identified relate to group 5 Nagano. Forms were recognized: flask=4.95%, II=3.96% =3.96 Globe, drop= 3.96% = 2.97%inverted Y, delta = 2.97% and trilobulada= 2.97% zone. According to the depth were identified as medium depth = 48.51%. Deep and surface = 33.66 = 17.82%. Conclusion: There is great variety in the shape and depth of pits and fissures of molars enamel. The high percentage of undescribed forms by Nagano proves to be addressed as a research problem of morph-histological characteristics of the primary dentition.
Subject(s)
Female , Child , Tooth, Deciduous , Tooth, Deciduous/abnormalities , Dental Fissures , Epidemiology, Descriptive , Observational Studies as Topic , Prospective Studies , Cross-Sectional StudiesABSTRACT
Aim: The aim of this in vitro study was to compare the reproducibility and accuracy of quantitative light-induced fluorescence (QLF) in relation to other technologies and conventional methods fordetecting occlusal carious lesions. Methods: Ninety-six extracted permanent molar teeth wereselected. Three examiners carried out examinations using Visual examination (VI), bitewing radiographs (RX), QLF, electrical conductance measurement (ECM), and DIAGNOdent. Twenty five percent of the teeth were re-examined for repeatability. Stereomicroscopic examination was used as the gold standard. Results: Intra- and inter-examiner agreement ranged from 0.43 to 0.89. Areas under ROC curves were 0.82, 0.54, 0.84, 0.79 and 0.88, respectively, for VI, RX,QLF, ECM and DIAGNOdent examinations, with RX significantly lower than the other methods. No significant statistical difference was found when comparing the areas under ROC curve of visual inspection and QLF. Conclusions: Although QLF and other technologies for early caries detection may offer some advantages, this study did not find significant improvement in occlusal caries detection when compared to visual examination.
Subject(s)
Dental Caries , Dental Fissures , Diagnosis , Diagnosis , Fluorescence , RadiographyABSTRACT
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