Periodontal regeneration capacity of equine particulate bone in canine alveolar bone defects

Purpose: This study was performed to evaluate the periodontal wound healing effect of particulate equine bone mineral on canine alveolar bone defects. Methods: Twelve adult male beagle dogs were used as study subjects. The mandibular second and fourth premolars were extracted prior to the experimental surgery, and the extraction sites were allowed to heal for 8 weeks. After periodontal probing, two-walled defects were created at the mesial and distal sides of the mandibular third premolars bilaterally, and the defects were filled with equine particulate bone with collagen membrane or bovine particulate bone with collagen membrane, or collagen membrane alone. The defects without any treatment served as negative controls. After probing depth measurement, animals were sacrificed at 10, 16, and 24 post-surgery weeks for micro-computed tomographic and histomorphometric analysis. Results: The equine particulate bone-inserted group showed significantly decreased values of probing depth and first bone contact compared to the negative control and collagen membrane alone groups at weeks 10, 16, and 24 (P < 0.05). There were no significant differences in the new cementum length, newly-formed bone area, or newly-formed bone volume between equine particulate bone- and bovine particulate bone-inserted groups, both of which showed significantly increased values compared to the negative control and collagen membrane alone groups (P < 0.05). Conclusions: Equine particulate bone showed significant differences in probing depth, first bone contact, new cementum length, newly formed bone area, and bone volume fraction values when compared to the negative control and collagen membrane alone groups. There were no significant differences between equine and bovine particulate bone substitutes in these parameters; therefore, we can conclude that equine particulate bone is equivalent to bovine bone for periodontal regeneration. (C) 2010 Korean Academy of Periodontology.

Habitar el espacio de la razón: Reseña de: Miguel Ángel Quintanilla Fisac (2021): A favor de la razón. Ensayos de filosofía moral. Ed. Laetoli, Pamplona, 193 pp.

Review of: Miguel Ángel Quintanilla Fisac (2021): A favor de la razón. Ensayos de filosofía moral. Ed. Laetoli, Pamplona, 193 pp.Reseña de: Miguel Ángel Quintanilla Fisac (2021): A favor de la razón. Ensayos de filosofía moral. Ed. Laetoli, Pamplona, 193 pp

Filosofía ciudadana: Miguel Ángel Quintanilla (2020): Filosofía ciudadana. Ed. Trotta, Madrid.

Review of: Miguel Ángel Quintanilla (2020): Filosofía ciudadana. Ed. Trotta, Madrid. 193 pp.Reseña de: Miguel Ángel Quintanilla (2020): Filosofía ciudadana. Ed. Trotta, Madrid

Educación, Conocimiento y Sociedad en Émile Durkheim

[spa] En este Trabajo de Final de Grado se estudia la Teoría del Conocimiento de Émile Durkheim y porqué el conocimiento es una realidad social. Para ello, estudiamos primero el concepto de hecho social, por ser central en la teoría de Durkheim, y ofrecemos una definición del mismo. En segundo lugar, examinamos el conocimiento en relación al concepto de hecho social, y lo hacemos estudiando el problema de la naturalización de las categorías y lo que Durkheim denomina las representaciones colectivas. Por último, se analiza las formas de transmisión social del conocimiento en sus elementos educativos.[eng] In this essay it is studied Durkheim’s Theory of Knowledge and the reasons why the knowledge is a social phenomenon. For thus, we firstly examine the most important concept in Durkheim’s works: the concept of social fact. Then, we put in relation the concept of knowledge and the concept of social fact, and we do it analysing the naturalization of categories and what Durkheim understands as collective representations. Finally, we study the forms of social transmission of knowledge in his educative element

Could we live in Nelson Goodman’s worlds? Thoughts on Goodman’s pluralism and its reconception of philosophy

The idea of living in a world seems to be obvious. Only a skeptical person would deny that we live in one, or that we are able to say it. And it is precisely because of skepticism that the existence and knowledge about the external world has been a recurring topic in the history of philosophy. Nelson Goodman has confronted this problem and has offered a constructivist and pluralist solution. This article explains these key points of Goodman's epistemology, as well as his ontological pluralism. Subsequently, I explain how, according to the author, these philosophical positions would imply a reconception of classical concepts of philosophy. Finally, I criticize the Goodmanian thesis that we can live in different worlds simultaneously and reconsider the problem from the perspectivist approach of the authors Manuel Liz, Margarita Vázquez and Antti Hautamäki.  La idea de vivir en un mundo parece ser obvia. Solamente una persona escéptica negaría que vivimos en uno, o siquiera que podamos afirmarlo. Y precisamente por el escepticismo es que la existencia y el conocimiento del mundo exterior ha sido un tópico recurrente en la historia de la filosofía. Nelson Goodman se ha enfrentado a este problema y ha ofrecido una solución constructivista y pluralista. En este artículo se explican estos puntos clave de la epistemología de Goodman, así como su pluralismo ontológico. Posteriormente, se explica como estas posturas filosóficas implicarían, de acuerdo con el autor, una reconcepción de conceptos clásicos de la filosofía. Finalmente, someto a crítica la tesis goodmaniana de que podamos vivir en mundos distintos simultáneamente y reconsidero el problema desde el enfoque perspectivista de los autores Manuel Liz, Margarita Vázquez y Antti Hautamäki