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Modification of surface films on chromium-nickel-molybdenum steel implants used in orthopaedics and traumatology

Marciniak J.

Journal of Achievements in Materials and Manufacturing Engineering

2010

Vol. 43, nr 1

108-116

Purpose: the paper is to characterize stainless steel of modyfied sufrace as a material used in orthopaedics and traumatology on the example of LCP (Locking Compression Plate) used in long bones treatment. Design/methodology/approach: In order to reach the goal biomechanical analyses, both numerical and experimental, were carried out. The results of the analyses are the basis for selecting geometrical features of a plate stabiliser and biomaterial mechanical properties. The degree of stress and deformation also determines areas where corrosion can start to develop. Chromium-nickel-molybdenum steel widely applied for making implants used in orthopaedics and traumatology was selected for testing implant surface modification. Passive and passive-carbon films were formed on the implants. The structure of the created films was tested together with their susceptibility to deformation and resistance to corrosion. Findings: It was shown that formation of passive-carbon DLC coatings is an effective method of increasing steel resistance to pitting, crevice and stress corrosion and of increasing its biocompatibility. Practical implications: The proposed surface treatment seems to be effective method that allow to reduce the risk of post-surgical complications. The coatings can be formed by using electrolytic polishing and passivation and a final RF PACVD process. Originality/value: The author also presents results of the coating surface topography examination, results of tests on its chemical and phase structure as well as mechanical and physicochemical properties.

Wpływ sposobu obróbki stali 00H17N14M2A na odporność implantów metalowych

Nawrat G., Bołd T., Korczyński A., Małachowski A., Zych-Romanów M.

Zeszyty Naukowe. Chemia / Politechnika Śląska

2001

z. 142

135-144

In this paper results of investigation of the influence of electrochemical and chemical surface treatment of steel 00H17N14M2A suitable for implants used in osseous surgery and cardiology (coronary stents) on their resistance to pitting have been presented. Composition of baths in which good gloss and smoothness of surfaces and resistance to pitting have been achieved.