Title: Diamond coated molybdenum dental tools for machining orthodontic bridgework materials

Authors: Mark J. Jackson, Waqar Ahmed, Htet Sein, Howard Taylor

Addresses: College of Technology, Center for Advanced Manufacturing, MET, Purdue University, 401 North Grant Street, West Lafayette, IN 47907, USA. ' School of Computing, Technology and Physical Sciences, University of Central Lancashire, Preston PR1 2HE, UK. ' Department of Chemistry and Materials, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, UK. ' Department of Chemistry and Materials, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, UK

Abstract: The growth of polycrystalline diamond films on molybdenum dental burs using a new hot filament Chemical Vapour Deposition (CVD) system has been investigated. A negative d.c. bias voltage relative to the filament was applied to the molybdenum substrate prior to deposition and showed improved film adhesion and increased diamond nucleation density. The CVD coated molybdenum dental bur was found to give much improved performance and lifetime compared to the conventional sintered diamond burs. This paper describes the performance of diamond coated molybdenum dental burs machining orthodontic bridge such as cobalt-chromium alloys, and also portrays an interesting picture of how these alloys react to machining with diamond using a finite element method.

Keywords: chemical vapour deposition; hot filament CVD; molybdenum; negative biasing; dental tools; orthodontic materials; diamond coating; orthodontic bridgework; machining; film adhesion; diamond nucleation density; dental burs; finite element method; FEM.

DOI: 10.1504/IJNBM.2007.016561

International Journal of Nano and Biomaterials, 2007 Vol.1 No.2, pp.184 - 199

Published online: 10 Jan 2008 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article