ABSTRACT
Dental fluorosis is a defect of enamel formation caused by chronic ingestion of fluoride from different sources during tooth development, which results in interference in proper mineralization. Clinically the tooth enamel may present as white striae along the lines of enamel, opaque white spot and in more severe cases as brown spots. Diagnosis is based on clinical characteristics associated with a history of exposure to fluoride. The aim of this report is to present a treatment in a child with severe aesthetic compromising in anterior maxillary permanent teeth caused by fluorosis. The treatment was based on a combination of three techniques in order to be minimally invasive, enhance aesthetics and preserving the dental structure
Fluorose dental é um defeito na formação do esmalte causado pela ingestão crônica de flúor de diferentes origens durante o desenvolvimento dentário, o que resulta em uma interferência na mineralização adequada. Clinicamente, o esmalte dentário pode assumir uma tonalidade esbranquiçada ou exibir pequenas manchas ou linhas brancas e, nos casos mais severos, manchas amarronzadas. O diagnóstico é baseado em características clínicas associadas com a história de exposição ao flúor. O foco deste estudo é mostrar o tratamento em uma criança com grande comprometimento estético em dentes permanentes anteriores superiores acometidos por fluorose. O tratamento baseou-se numa combinação de três técnicas, a fim de ser minimamente invasiva, melhorar a estética e preservar a estrutura dentária
Subject(s)
Humans , Female , Child , Composite Resins , Enamel Microabrasion , Dental Enamel , Tooth Bleaching , Child , Dentists , Fluorosis, DentalABSTRACT
El objetivo de este trabajo fue explorar la posible asociación entre un granuloma periapical extenso en la región de molares primarios y la agenesia del premolar sucedáneo. Una niña blanca de 10 años con una tumefacción indolora en la región mandibular derecha quien al examen radiográfico reveló presencia de una lesión radiolúcida, única, bien definida y amplia, con un diámetro de aproximadamente 15 mm, en íntima asociación con la región periapical del segundo molar inferior primario derecho con destrucción de la corona clínica por caries, también se observa la ausencia del segundo premolar inferior sucesor derecho. Se procedió a la eliminación total de la lesión intraósea y el diente asociado, el tejido extirpado fue diagnosticado histopatológicamente como un Granuloma Periapical. Después de 3 meses de seguimiento la paciente mostró una buena cicatrización postquirúrgica del defecto óseo por la eliminación de la lesión inflamatoria. Este caso clínico concluye que la etiopatogenia de la agenesia dentaria no es del todo conocida y sugiere que otros factores no genéticos, como grandes lesiones periapicales, podrían influir a nivel local en las primeras etapas de la odontogénesis y llevar a cabo la formación del segundo premolar inferior, aunque se necesitan más estudios sobre el tema
The aim of this study was to explore the possible association between a large periapical granuloma in the primary molar region and agenesia of the successor premolar. A 10 years old white girl with a painless swelling in the right mandibular region in the radiographic examination revealed the presence of a radiolucent lesion, single, well defined and comprehensive, with a diameter of about 15 mm, in close association with the apical region of the second right primary molar widely decayed, also noting the absence of the second premolar successor. Proceeded to the total elimination of the intraosseous lesion and the associated tooth, the removed tissue was histopathologically diagnosed as a periapical granuloma. Three-month follow-up after treatment the patient showed good postoperative bone defect healing by eliminating the inflammatory lesion. This clinical report concludes that the etiopathogenesis of dental agenesis is not entirely known and suggests that other non-genetic factors, such as large periapical lesions, could influence locally in the early stages of odontogenesis and compromise the formation of the lower second premolar, although more research is needed on the subject
Subject(s)
Female , Child , Bicuspid/pathology , Bicuspid , Odontogenesis , Periapical Granuloma , Wound Healing , DentistryABSTRACT
This study evaluated the effects of acidic medicines (Dimetapp® and Claritin®), under pH-cycling conditions, on the surface degradation of four composite resins (microhybrid: TPH, Concept, Opallis and Nanofilled: Supreme). Thirty disc-shaped specimens (Ø = 5.0 mm / thickness = 2.0 mm) of each composite were randomly assigned to 3 groups (n = 10): a control and two experimental groups, according to the acidic medicines evaluated. The specimens were finished and polished with aluminum oxide discs, and the surface roughness was measured by using a profilometer. After the specimens were submitted to a pH-cycling regimen and immersion in acidic medicines for 12 days, the surface roughness was measured again. Two specimens for each material and group were analyzed by scanning electron microscopy (SEM) before and after pH-cycling. Data were analyzed by the Student's-t test, ANOVA, Duncan's multiple range test and paired t-test (α=0.05). Significant increase in roughness was found only for TPH in the control group and TPH and Supreme immersed in Claritin® (p<0.05). SEM analyses showed that the 4 composite resins underwent erosion and surface degradation after being subjected to the experimental conditions. In conclusion, although the roughness was slightly affected, the pH-cycling and acidic medicines caused surface degradation of the composite resins evaluated. Titratable acidity seemed to play a more crucial role on surface degradation of composite resins than pH.