Fabrication and characterization of superficially modified porous dental implants
- Others:
- Universidad de Sevilla. Departamento de Ingeniería y Ciencia de los Materiales y del Transporte
- Universidad de Sevilla. Departamento de Ingeniería Mecánica y Fabricación
- Universidad de Sevilla. TEP123: Metalurgia e Ingeniería de los Materiales
- Universidad de Sevilla. TEP111: Ingeniería Mecánica
Description
Stress-shielding and loosening compromise the success of dental implants under real-life service conditions. This work evaluates the mechanical behavior of superficially modified porous titanium dental implants fabricated by two different routes: conventional powder metallurgy and space-holder techniques. A novel, feasible and repetitive protocol of micro-milling of the implant thread (before sintering), as well as surface modification treatments (after sintering) are also implemented. The discussion is conducted in terms of the influence of porosity and surface roughness on the stiffness and yield strength of implants. The macro-pores concentrate stress locally, and, at the same time, they could act as a barrier to the propagation of micro-cracks. Higher rugosity was observed for virgin implants obtained with spacer particles. Concerning superficially modified implants, while bioglass 1393 was the most effective coating due to its greater infiltration and adhesion capacity, chemical etching could improve osteoblast adhesion because modifies the roughness of the implant surface.
Abstract
Ministry of Science and Innovation of Spain PID2019-109371GB-I00
Abstract
Junta de Andalucía–FEDER (Spain) US-1259771
Additional details
- URL
- https://idus.us.es/handle//11441/104300
- URN
- urn:oai:idus.us.es:11441/104300
- Origin repository
- USE