RESUMO
Introducción: La Reabsorción Cervical Invasiva (RCI) se origina en la superficie externa de la raíz, generalmente por un daño previo, y quizá crónico, del ligamento periodontal, y una rotura de la capa de tejido no mineralizado que permite una actividad odontoclástica, invadiendo la dentina en cualquier dirección y con diferentes grados. Dejada a su libre evolución conlleva la pérdida del diente. Caso clínico: Paciente de 45 años que acude a la consulta por presentar un tracto sinusal a nivel del 4.7. Se diagnostica necrosis pulpar con absceso apical crónico de etiología dudosa. Tras el fracaso del tratamiento de conductos, se opta por la exodoncia y se realiza el diagnóstico intraoperatorio de RCI. Tratada la causa, se realiza el reimplante intencional (RI). Conclusión: La técnica de RI se presenta como una alternativa a la cirugía periradicular, siendo una herramienta valiosa en la conservación de dientes con pronóstico comprometido
No disponible
Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Reabsorção de Dente/cirurgia , Reabsorção de Dente/diagnóstico por imagem , Colo do Dente/diagnóstico por imagem , Colo do Dente/cirurgia , Resultado do Tratamento , SeguimentosRESUMO
INTRODUCTION: The aim of this study was to evaluate the cyclic fatigue resistance of ProTaper Universal (PTU; Dentsply Maillefer, Baillagues, Switzerland) and ProTaper Gold (PTG, Dentsply Maillefer) nickel-titanium rotary files at room and intracanal temperatures. METHODS: A total of 120 files were used to test the cyclic fatigue resistance of PTU (S1 and F2) and PTG (S1 and F2) in an artificial canal at room temperature (20°C) and at intracanal temperature (35°C). The number of cycles to failure and the fracture length of the fragment were recorded, and data were subjected to statistical analysis. RESULTS: PTG registered no differences in fatigue life between the 2 temperatures tested (P > .05), whereas PTU showed a statistically significant reduction in fatigue life at intracanal temperature compared with room temperature (P < .05). PTG instruments exhibited a statistically higher resistance to cyclic fatigue than PTU instruments both at room and intracanal temperatures (P < .05). There were no statistically significant differences among the fracture length of separated instruments (P > .05). CONCLUSIONS: Intracanal temperature influenced the cyclic fatigue resistance of instruments produced with traditional nickel-titanium, whereas it did not influence the fatigue life of instruments produced with gold heat treatment. Gold heating treatment enhances the resistance to cyclic fatigue of ProTaper instruments.