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Título:	Comparative study on AISI 440 and AISI 420B stainless steel for dental drill performance
Autor/a:	Albertini, M.; Herrero Climent, Mariano; Lázaro, Pedro; Ríos, Jose Vicente; Gil Mur, Francisco Javier
Otros autores:	Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. BBT - Biomaterials, Biomecànica i Enginyeria de Teixits
Abstract:	One of the most usual causes of the failure in dental implant osseointegration is the increase of the temperature above 47 °C during the drilling of the bone because it produces irreversible osteonecrosis. The result is weakened contact of implants with bone and possible loss of rigid fixation. Many studies about the design of the drill bit, contact forces, drill speed, drill point angle and feed-rate have been made. However, in all studies a martensitic stainless steel (AISI 440) has been used. The aim of this study was to determine the behavior of AISI420B stainless steel with higher hardness, higher heat conductivity and lower wear than the conventional stainless steel used in oral implantology. This steel showed adequate temperature increases, with or without irrigation, and a decrease of the weight lost of the drills with use.
Abstract:	Peer Reviewed
Materia(s):	-Àrees temàtiques de la UPC::Enginyeria dels materials -Stainless stee -Biomedical materials -Biomaterials -Drill -Stainless steel -Wear -Acer inoxidable -Biomaterials
Derechos:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Tipo de documento:	Artículo - Versión publicada Artículo
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