About new techno-social networks: political and educational emergencies
This article is based on a qualitative research done with ﬁve countercultural groups in Colombia, which inten-sively use information and communication technologies. The results are analyzed in relation to new ways to share and disseminate knowledge and new forms of social and political organization. They are comprehended as an expanded social educative practice. These technosocial practices are considered as ways of being resistant against dominant and homogenizing political and cultural models. They also show alternative forms of community and knowledge. Nevertheless, it is a novelty observed in relation to the power and inequality that exist in those collectives.
Cibercultura: metáforas, prácticas sociales y colectivos en red
Cyberculture is considered a research field where it is possible to understand the cultural transformations that are linked to the construction of digital technologies in contemporary societies and, in particular, in those of the so-called Third World, through complex relations of techno-social frameworks in three areas: the exercise of power, the collective social action, and the aesthetic experience.
Assessment of fractures in endodontically treated teeth restored with and without root canal posts using high-resolution cone beam computed tomography
Background Root fractures are a diagnostic challenge for dentists in endodontic treatment. This study aimed to determine the relationship between the characteristics of tooth fractures and the presence of root canal posts in endodontically treated teeth using high-resolution cone beam computed tomography (CBCT). Material and Methods Fifty high-resolution CBCT scans of endodontically treated teeth with a diagnosis of fracture were obtained, of which 30 were from women and 20 were from men. These scans were acquired with three Veraviewepocs 3D units and one 3D Accuitomo 170 unit, with a 40 × 40-mm field of view and 125 μm voxel size. The variables assessed included the type of fracture, extent of fracture, type of retention, post length, cause of endodontic failure, location of the lesion, and time required to detect the fracture (difficulty score). For data analysis, the chi-squared test, Student’s t-test, and multiple linear regression (α <0.05) were used. Results No association was found between the type of fracture and type of retention or between the type of fracture and its extent (P>0.05). On the other hand, the type of fracture significantly influenced the time required for its detection. Additionally, the most difficult plane for detecting the fracture and the difficulty score were associated, with statistically significant results. Conclusions The type of fracture in endodontically treated teeth was not associated with the type of post used for restoration. All of the CBCT systems used to detect tooth fracture showed the same efficiency. Key words:Cone-Beam CT, Tooth Fracture, Root Canal Post.