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I En esta tierra yerma de zanjas sin tumba abandonados cuerpos esperan el rostro desollado de la muerte, y el sacrificado perfume de lirios y crisantemos en un país sobrepoblado de madres que lloran la llegada ausente de sus mesías. En esta tierra yerma de zanjas sin tumba la brisa olvidada y el aire de los ríos develan en la geografía de su cuerpo una herida abierta donde sucumben devota y saciadamente el excremento y la putrefacción de los asesinos. II La memoria tiene ira es puesta en abis...

En un contexto donde el silencio se vuelve angustiante, visi-bilizar es quizás una primera acción para combatir el olvido colectivo, porque a través del relato y la acción se inicia un proceso de memorialización pública, necesario en una sociedad que esconde sus males y sus muertos, carente de interlocutores confiables a quien recurrir. Los crímenes actuales forman una herida abierta desde la cual es imposible pensar el duelo colectivo. El cuerpo social mexicano es un cuerpo acribillado, que sufre la violencia y su estigmatización. ¿Serán las prácticas creativas de los artistas y los colectivos, basadas en la acción relacional con la sociedad civil, una contribución al trabajo de memoria, al implicar la visibilidad del trauma colectivo en el espacio público y un proceso de sensibilización social? Interactuar y visibilizar puede ser un arma contra el silencio. La práctica artística despliega un “trabajo de memoria” que posibilita luchar contra el olvido, porque perturba, atormenta y opera, "trabaja”. El trabajo de visibilización de la violencia y sus consecuencias, es también el trabajo de grupos de ciudadanos, vinculados a las familias de las víctimas, a las organizaciones sociales, y a todos los que quieran participar en estas iniciativas. Hacer colectivo este trabajo vinculándonos con aquellas personas que sufren de manera directa la violencia, quizás permitiría prácticas de remembranza más integradoras y amplias. Los textos aquí reunidos, bajo el título Cuerpos memorables, están acotados por las circunstancias en que vivimos, pensamos y trabajamos. Los artistas e investigadores ejercen una práctica cuya posibilidad máxima, en lo relativo a la posibilidad de incidir socialmente, apunta a la disposición para acompañar y aprender de aquellos que están poniendo directamente el cuerpo para defender la vida digna, después de perder y buscar a sus seres queridos.

Dens invaginatus (DI) is a developmental anomaly that poses a significant challenge to the clinician if endodontic treatment is required. The type II (as per Oehlers) form exhibits complex internal anatomy and is frequently associated with incomplete root and apex formation. The purpose of this study is to present two cases of type II DI in the maxillary lateral incisors. In the first case, non-surgical endodontic therapy was performed utilizing calcium hydroxide as an intracanal dressing, showing significant periapical healing of the apical radiolucent area at the six month follow-up. In the second case, the development of the root and apex were affected by pulp necrosis, and the revascularization procedure was performed. Complete resolution of the pre-existing apical radiolucency, apical closure, thickening of the root canal walls, and increase in root length, after 32 months was observed. Early detection of teeth with DI type II and proper exploration of their internal anatomy are key factors for their successful management. As demonstrated in this report, conservative non-surgical endodontic treatment should be the first line of treatment for these cases. The use of revascularization protocols in teeth that develop pulp necrosis and exhibit early stage of root development could be a better alternative than traditional apexification techniques.

The modern surgical endodontic treatment is a safe and predictable procedure with high success rate. However, several factors can retard or impede the proper healing process. Use of a high speed handpiece during hard tissues management (osteotomy and apical resection) can potentially be one of these factors. Formation of metallic debris from the surgical diamond burs, production of necrotic local tissue due to overheating and the direct liberation of air from conventional handpiece into the working area are potential irritants able to delay the tissue healing. The aim of the present article is to report the histopathological findings of the trans-operational accidental contamination with oil in the surgical area during an endodontic surgery.

Usually, the mandibular canine only has one root and one root canal. However, there has been a noticeable increment in evidence showing variations in its morphology, such as the presence of two roots and two root canals. The aim of this article was to present a case of a mandibular canine with two roots and two root canals and to review the available literature on this anatomic variation. Root canal treatment of tooth #43 with such morphology was performed in a 47-year-old woman. Careful inspection of the preoperative radiograph indicated the presence of more than one canal. The 12-month follow-up showed normal periapical tissues, with no pain or tenderness. Literature review revealed that the overall prevalence of such root canal configuration is 5.7%, with a strong preference for female sex (87.5%). Although mandibular canines with two roots and two root canals are not common, clinicians should always anticipate the presence of possible variations. Therefore, timely diagnosis and meticulous exploration of such mandibular canines allow for planning of an individualized treatment protocol, tailored to their peculiar morphology, focused on avoiding excessive weakening or even perforation of the roots.

The presence of a foreign body in the periapical tissues can cause endodontic failure by triggering an inflammatory response and a subsequent foreign body reaction. This inflammatory response, which can occur to varying degrees, appears radiographically as a radiolucency that can remain asymptomatic for many years. A foreign object can reach the apical region by accident or iatrogenic procedures during dental procedures. The aim of the present case report is to describe the endodontic surgical treatment of an iatrogenic displacement of a foreign body (a metal fragment) into the periapical tissues and to describe its clinical and radiographic follow-up over a period of 52 months.

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