The poroaccessibility parameters for three-dimensional characterization of orthopaedic implants porous coatings

• Autorzy: Uklejewski, R. , Winiecki, M. , Mielniczuk, J. , Rogala, P. , Auguściński, A.
• Języki publikacji: EN

Abstrakty

EN

The ability of formation of the proper bone-porous implant fixation depends, among others, on the structural-osteoinductive properties of the porous coating covering the orthopaedic implant surface. These properties, describing the poroaccessibility of porous biomaterial, are one of co-factors conditioning the promotion of bone tissue ingrowth into pore space of implant porous coating. So far the structural-osteoinductive properties of implants porous coatings are described by the traditional two-dimensional roughness parameters obtained with contact or non-contact roughness profile measurement (mostly standard surface roughness amplitude parameters e.g.: Ra, Rq, Rmax) or with the average pore size, which is, in the authors opinion, inadequate and unsatisfactory for porous coating characterization in respect of its poroaccessibility. The lack of proper directives on porous structure characterization of titanium and hydroxyapatite coatings on orthopaedic implants is the reason to work them out. In connection with the development of methods for surface texture analysis in three dimensions, the authors have perceived new possibilities for porous coatings microstructure analysis and on this base a set of parameters of poroaccessibility of implant porous coating for bone tissue ingrowth has been proposed: the effective volumetric porosity ΦVef, the index of the porous coating space capacity VPM, the representative surface porosity ΦSrep, the representative pore size pSrep, the representative angle of the poroaccessibility Ωrep and the bone-implant interface adhesive surface enlargement index Ψ. With this set of parameters one can characterize the structural-osteoinductive properties of porous biomaterial. In this paper a new set of poroaccessibility parameters of implant porous coatings and a method of calculation of these parameters on the basis of three-dimensional roughness measurements are presented.

Słowa kluczowe

EN

surface topography; joint replacement; biologic fixation of implants; bone tissue ingrowth; porous coating poroaccessibility

• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2008
• Tom: Vol. 15, nr 2
• Strony: 215-226
• Opis fizyczny: Bibliogr. 40 poz., rys., wykr.

Twórcy

autor

Uklejewski, R.

autor

Winiecki, M.

autor

Mielniczuk, J.

autor

Rogala, P.

autor

Auguściński, A.

• Kazimierz Wielki University, Department of Fundamentals of Medical Bioengineering, Institute of Technology, Bydgoszcz, Poland,

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