RESUMO
PURPOSE: The variations in interproximal contact areas have been categorised open (O), point (X), straight (I), and curved contact (S). This is based on their shapes and termed as OXIS classification. The interactive OXIS calibration website was developed to assist researchers seeking appropriate knowledge, minimise the overload of material, optimise efficiency in calibration and, to provide repositories for clinicians, healthcare workers, and policymakers. METHODS: The website was developed in two phases. The first phase of development included expert group discussion, Focus Group Discussion (FGD), and the implementation of FGD recommendations. The second phase emphasised registration and development of the interactive web portal on OXIS classification. The developed website was subjected to user experience testing, functional testing, performance testing, security testing, device, platform testing, and then hosted. Calibrated students and faculties evaluated it with the help of Suitability Assessment of Materials (SAM) and System Usability Scale (SUS). Finally, after amendments, the website was evaluated by non-calibrated researchers and multidisciplinary experts. RESULTS: The total agreement was 74% for overall SAM category. Pooled mean total score of SUS was 52.7 (SD 7.17; range 45-67.5), indicating an average score. CONCLUSION: The content of the developed website has been evaluated as "satisfactory" and its technical quality as "of higher standards".
RESUMO
Three-dimensional (3D) bioprinting of cells is an emerging area of research but has not been explored yet in the context of periodontal tissue engineering. Objetive: This study reports on the optimization of the 3D bioprinting scaffolds and tissues used that could be applied clinically to seniors for the regenerative purpose to meet individual patient treatment needs. Material and Methods: We methodically explored the printability of various tissues (dentin pulp stem/progenitor cells, periodontal ligament stem/progenitor cells, alveolar bone stem/progenitor cells, advanced platelet-rich fibrin and injected platelet-rich fibrin) and scaffolds using 3D printers pertaining only to periodontal defects. The influence of different printing parameters with the help of scaffold to promote periodontal regeneration and to replace the lost structure has been evaluated. Results: This systematic evaluation enabled the selection of the most suited printing conditions for achieving high printing resolution, dimensional stability, and cell viability for 3D bioprinting of periodontal ligament cells. Conclusion: The optimized bioprinting system is the first step towards the reproducible manufacturing of cell laden, space maintaining scaffolds for the treatment of periodontal lesions.
La bioimpresión tridimensional (3D) de células es un área emergente de investigación, pero aún no se ha explorado en el contexto de la ingeniería de tejidos periodontales. Objetivo: Este estudio informa sobre la optimización de los tejidos y andamios de bioimpresión 3D utilizados que podrían aplicarse a personas mayores en el entorno clínico con fines regenerativos para satisfacer las necesidades de tratamiento de cada paciente. Material y Métodos: Exploramos metódicamente la capacidad de impresión de varios tejidos (células madre / progenitoras de la pulpa de dentina, células madre / progenitoras del ligamento periodontal, células madre / progenitoras de hueso alveolar, fibrina rica en plaquetas avanzada y fibrina rica en plaquetas inyectada) y andamios utilizando impresoras 3D que pertenecen solo a defectos periodontales. Se ha evaluado la influencia de diferentes parámetros de impresión con la ayuda de andamios para promover la regeneración periodontal y reemplazar la estructura perdida. Resultados: Esta evaluación sistemática permitió la selección de las condiciones de impresión más adecuadas para lograr una alta resolución de impresión, estabilidad dimensional y viabilidad celular para la bioimpresión 3D de células del ligamento periodontal. Conclusión: El sistema de bioimpresión optimizado es el primer paso hacia la fabricación reproducible de andamios de mantenimiento de espacio cargados de células para el tratamiento de lesiones periodontales
Assuntos
Humanos , Engenharia Tecidual/métodos , Bioimpressão/métodos , Impressão Tridimensional , Doenças Periodontais/terapia , Regeneração , Células-TroncoRESUMO
OBJECTIVE: To evaluate and compare the efficacy of gentamicin, amoxicillin and metronidazole (GAM) antibiotic paste in noninstrumentation and instrumentation techniques in infected primary molars. METHODS: Sixty primary molars in children of 4 to 8 years were selected and divided into four groups: teeth without any periapical or furcation involvement undergoing pulpectomy by noninstrumentation (Group N1) and instrumentation (Group N2) technique using GAM antibiotic paste; teeth with periapical or furcation involvement undergoing pulpectomy by noninstrumentation (Group R1) and instrumentation (Group R2) technique using GAM antibiotic paste. Regular follow-up at 3, 6 and 12 months was carried out for each group and all the clinical and radiographic changes were evaluated statistically using SPSS software. The level of significance was set to P < 0.05. RESULTS: Overall, 73.3% of success was observed in Group N1, 71.4% in Group N2, 86.7% in both Group R1 and Group R2 (P = 0.003). CONCLUSION: The GAM lesion sterilisation and tissue repair (GAM-LSTR) technique can be an alternative to conventional pulpectomy.
