El presente trabajo evalúa la efectividad de una intervención utilizando Praxias bucofonatorias con dispositivos bucales en conjunto con realidad virtual inmersiva (RVI), mediante programas diseñados para estimular estados de relajación e interacción en diferentes ambientes virtuales. Para ello, se aplicó la terapia integrada de vibro estimulación bucal palatina, ejercitación lingual y la exposición a imágenes y sonidos empleando RVI en un grupo de 6 niños con el diagnóstico de dislalia. Se comparó los resultados de esta intervención con el de una intervención utilizando únicamente la vibro estimulación bucal palatina en un grupo de 20 niños con diagnóstico de dislalia. Finalmente, se aplicó la terapia integrada de vibro estimulación bucal palatina, ejercitación lingual y RVI en un grupo de niños con autismo. Los resultados observados mostraron que la terapia con dispositivos bucales combinadas con RVI tendía a producir mayores avances que la terapia sin RVI. Además, se observó diferentes grados de avances individuales y grupales en el dominio fonético dependiendo las habilidades de habla inicial, los niños con mejores habilidades presentaban mayores avances. El grupo de niños con autismo presentó menores avances respecto de los otros dos grupos. A pesar de las limitantes del presente estudio (diferente cantidad de sujetos por grupo y distintas edades) puede considerarse esta propuesta como prometedora para futuros estudios.

Background: Developing reliable and cost-effective decellularization methods is critical for advancing tissue engineering and regenerative medicine, particularly in regions with limited access to specialized perfusion systems. Methods: This study standardized a gravity-assisted perfusion protocol for rat liver decellularization, designed to operate without pumps or pressurized equipment. Adult Wistar rat livers were processed through a gravity-driven vascular flushing method and compared with a conventional immersion-based protocol. The resulting scaffolds were evaluated by macroscopic inspection, histological staining (Masson’s trichrome), and residual DNA quantification. Results: The gravity-assisted perfusion method achieved more efficient cellular removal and superior preservation of extracellular matrix (ECM) integrity compared with immersion. Residual DNA levels were 3.7 ng/mg in perfused samples, 209.47 ng/mg in immersed samples, and 331.97 ng/mg in controls, confirming a statistically significant reduction (p < 0.05). Only the perfused group met the accepted threshold for effective decellularization (<50 ng/mg dry tissue). Histological analysis corroborated these findings, showing the absence of nuclei and the preservation of collagen architecture characteristic of a structurally intact ECM. Conclusions: This low-cost, reproducible, and technically simple system enables the generation of high-quality acellular hepatic scaffolds without mechanical pumps. Its accessibility and scalability make it suitable for laboratories with limited infrastructure and educational settings. Moreover, this gravity-assisted approach provides a foundation for future recellularization and preclinical studies aimed at developing bioengineered liver constructs for regenerative and transplant applications.

In this work, titanium dioxide scaffolds were synthesized. Titanium isopropoxide (IV) was used as a precursor in its formation, using a polymeric network of galactopyranose as a template. The powder sample obtained was evaluated by scanning tunneling microscopy (STM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, and thermal gravimetric analysis (TGA-DTA). According to the results, it was found that these scaffolds can be successfully synthesized in solution using the sol-gel method. The synthesized scaffolds have diameters from 50 nm with porosity of approximately 0.3–10 nm. Important parameters, such as pH and the concentration of the metallic precursors, were optimized in this solution. The values of maximum average roughness R(max) and roughness value (Ra) were 0.50 and 1.45, respectively. XRD diffraction analysis shows the formation of crystalline phases in the TiO₂ scaffold at 700 °C. The use of biological polymers represents an alternative for the synthesis of new materials at low cost, manipulating the conditions in the production processes and making the proposed system more efficient.