Stereo imaging and cytocompatibility of a model dental implant surface formed by direct laser fabrication

C Mangano, M Raspanti, T Traini, A Piattelli, Rachel Sammons

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Direct laser fabrication (DLF) allows solids with complex geometry to be produced by sintering metal powder particles in a focused laser beam. In this study, 10 Ti6Al4V alloy model dental root implants were obtained by DLF, and surface characterization was carried out using stereo scanning electron microscopy to produce 3D reconstructions. The surfaces were extremely irregular, with approximately 100 microm deep, narrow intercommunicating crevices, shallow depressions and deep, rounded pits of widely variable shape and size, showing ample scope for interlocking with the host bone. Roughness parameters were as follows: R(t), 360.8 microm; R(z), 358.4 microm; R(a), 67.4 microm; and R(q), 78.0 microm. Disc specimens produced by DLF with an identically prepared surface were used for biocompatibility studies with rat calvarial osteoblasts: After 9 days, cells had attached and spread on the DLF surface, spanning across the crevices, and voids. Cell density was similar to that on a commercial rough microtextured surface but lower than on commercial smooth machined and smooth-textured grit-blasted, acid-etched surfaces. Human fibrin clot extension on the DLF surface was slightly improved by inorganic acid etching to increase the microroughness. With further refinements, DLF could be an economical means of manufacturing implants from titanium alloys.
Original languageEnglish
Pages (from-to)823-31
Number of pages9
JournalJournal of Biomedical Materials Research Part A
Volume88
Issue number3
Early online date15 May 2008
DOIs
Publication statusPublished - 1 Mar 2009

Keywords

  • dental implant
  • direct laser fabrication
  • surface analysis
  • stereoimaging
  • cytocompatibility

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