Extrusive, Intrusive Luxation and Avulsion in a 7-Year- Old Child: One year of Clinical, Radiographic and Tomographic Follow-Up

ABSTRACT: Dental trauma is a serious injury that occurs frequently in children and adolescents, requiring urgent dental care. The upper central incisors are the most vulnerable teeth to such traumatic injuries, which can lead to bite restrictions, difficulties in phonation and esthetical questions. The aim of this study was to report the success of a conserva tive approach carried out on a 7-year-old patient, victim of multiple dental trauma, involving permanent and deciduous teeth. The male patient fell from his own height, causing soft tissue lacerations and dento-alveolar traumatism in both deciduous and permanent teeth. Complementary examinations (periapical radiographs and computed tomography) were carried out. Based on the diagnoses the patient was referred to specialists for appropriate treatment. The present report highlights the importanc e of an early diagnosis, suitable treatment and follow-up of patients after an alveoli-dental trauma and shows the direct relationship of this approach with the prognosis of the patient and the tooth.

RESUMEN: El trauma dentario es una lesión grave que ocurre con frecuencia en niños y adolescentes y requiere atención dental urgente. Los incisivos centrales superiores son las piezas dentarias más vulnerables a dichos traumas, pudiendo generar restricciones en la mordida, la fonación y a nivel estético. El objetivo de este estudio fue reportar el éxito de un enfoque conservador llevado a cabo en un niño de 7 años de edad, víctima de un trauma dentario múltiple, que involucró tanto dientes temporales como permanentes. El paciente masculino, cayó desde su propia altura, causando laceraciones en los tejidos blandos y traumatismo dento- alveolar en piezas de ambas denticiones. Se llevaron a cabo exámenes complementarios (radiografías periapicales y tomografía computarizada). Basado en el diagnóstico, el paciente fue referido a especialistas para realizar el tratamiento apropiado. El presente reporte destaca la importancia de un diagnóstico precoz, un tratamiento adecuado y el seguimiento de los pacientes luego de un trauma dento-alveolar, y cómo este enfoque muestra relación directa con el pronóstico del paciente y del diente.

Evaluation of dentinogenesis inducer biomaterials: an in vivo study

Abstract When exposure of the pulp to external environment occurs, reparative dentinogenesis can be induced by direct pulp capping to maintain pulp tissue vitality and function. These clinical situations require the use of materials that induce dentin repair and, subsequently, formation of a mineralized tissue. Objective: This work aims to assess the effect of tricalcium silicate cements and mineral trioxide aggregate cements, including repairing dentin formation and inflammatory reactions over time after pulp exposure in Wistar rats. Methodology: These two biomaterials were compared with positive control groups (open cavity with pulp tissue exposure) and negative control groups (no intervention). The evaluations were performed in three stages; three, seven and twenty-one days, and consisted of an imaging (nuclear medicine) and histological evaluation (H&E staining, immunohistochemistry and Alizarin Red S). Results: The therapeutic effect of these biomaterials was confirmed. Nuclear medicine evaluation demonstrated that the uptake of 99mTc-Hydroxymethylene diphosphonate (HMDP) showed no significant differences between the different experimental groups and the control, revealing the non-occurrence of differences in the phosphocalcium metabolism. The histological study demonstrated that in mineral trioxide aggregate therapies, the presence of moderate inflammatory infiltration was found after three days, decreasing during follow-ups. The formation of mineralized tissue was only verified at 21 days of follow-up. The tricalcium silicate therapies demonstrated the presence of a slight inflammatory infiltration on the third day, increasing throughout the follow-up. The formation of mineralized tissue was observed in the seventh follow-up day, increasing over time. Conclusions: The mineral trioxide aggregate (WhiteProRoot®MTA) and tricalcium silicate (Biodentine™) present slight and reversible inflammatory signs in the pulp tissue, with the formation of mineralized tissue. However, the exacerbated induction of mineralized tissue formation with the tricalcium silicate biomaterial may lead to the formation of pulp calcifications