scholarly journals Biotribology in Arthroplasty: Worn Surfaces Investigation on Ceramic Hip Femoral Heads Considering Wettability

2020 ◽  
Vol 10 (24) ◽  
pp. 8919
Author(s):  
Saverio Affatato ◽  
Alessandro Ruggiero
Keyword(s):  
Amplitude Distribution ◽  
Average Roughness ◽  
Surface Evolution ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Roughness Profile ◽  
Femoral Heads ◽  
Hip Replacements ◽  
Worn Surfaces

Ceramic-on-ceramic bearings for total hip replacement are considered the best choice to avoid problems such as osteolysis and wear, mainly related to soft bearings. The aim of this work was to investigate in a comparative way different kinds of ceramic femoral heads for total hip replacements from a biotribological point of view, discussing the results obtained in terms of topographies, presence of metal transfer (MT) phenomena, and wettability on their worn surfaces in a tribological framework. Different ceramic femoral heads derived from in vitro wear tests, retrieved form patients, and brand new total hip replacements were investigated. The patients group had an average age of 60 years (ranging from 27 to 83). In most cases, the cause of failure was aseptic loosening of the acetabular component. Roughness analyses were performed to measure the tribological surface evolution of the material; an SEM and EDS investigation on the explanted heads proves and quantified MT, while the wettability was measured through a novel optical laboratory set-up with the aim to furnish useful data in the framework of synovial lubrication phenomena acting in the tribosystem. For the average roughness measurements on explanted specimens were considered three parameters (Ra = the average area between the roughness profile and its mean line; Rt = the vertical distance from the deepest valley to the highest peak of the roughness profile; and Rsk = it is the skewness and it is a measure of the asymmetry of the amplitude distribution function. In other words, the skewness indicates whether a surface is dominated by peaks or by valleys) and their values were: Ra 0.22 ± 0.12 μm, Rt 34.5 ± 13.5 μm and Rsk −0.01 ± 11.3; on the new specimens we measured Ra 0.01 ± 0.001 μm, Rt 0.12 ± 0.09 μm, and Rsk = 5.67 ± 8.7; for the in vitro specimens they were Ra 0.05 ± 0.12 μm, Rt 0.71 ± 1.4 μm and Rsk 7.73 ± 20.6. The wettability angle measurements showed hydrophilic surfaces for all femoral heads considered in this study with small differences between the three investigated categories, allowing to discuss their effects on the biobearings’ lubrication phenomena.

An Experimental Study of Metallic Transfer on Ceramic Femoral Heads

2009 ◽  
Author(s):  
Douglas M. Doud ◽  
Preston R. Beck ◽  
Donald R. Petersen ◽  
Jack E. Lemons ◽  
Alan W. Eberhardt
Keyword(s):  
Experimental Study ◽  
Femoral Head ◽  
Life Expectancy ◽  
Metal Transfer ◽  
Acetabular Cup ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Femoral Heads ◽  
Hip Replacements ◽  
Postoperative Dislocation

Postoperative dislocation of total hip replacements has been documented to occur at a rate of approximately 2.4–3.9% [1–3]. Such events may result in the transfer of titanium from the acetabular cup to the femoral head, both during the dislocation and surgical reduction of the dislocated joint [3,4]. If the head is reduced with this transfer present, the joint life expectancy, which depends on articulating surfaces remaining smooth, is reduced [4]. Although the presence of metal transfer on retrieved femoral heads after dislocation is documented, no previous studies have attempted to quantify the forces or contact stresses at which metal transfer occurs.

Assessment of Titanium Alloy on Polyethylene Bearing Surfaces in Retrieved Uncemented Total Hip Replacements

1994 ◽  
Vol 208 (2) ◽  
pp. 91-95 ◽  
Author(s):  
K J Drabu ◽  
R J Michaud ◽  
P J J McCullagh ◽  
K Brummitt ◽  
R A Smith
Keyword(s):  
Titanium Alloy ◽  
Hip Arthroplasty ◽  
Surface Finish ◽  
Revision Surgery ◽  
Articular Surface ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Femoral Heads ◽  
Hip Replacements ◽  
Bone Particles

Changes to the bearing surfaces of eighteen uncemented total hip replacements retrieved at revision surgery were assessed by three-dimensional binocular microscopy, Rank Taylor Hobson talysurf measurements, scanning electron microscopy, and X-ray dispersive analysis. Abrasions on the non-articular surface of the polyethylene cups were present. Bone particles were found in tracks in the bearing surfaces of both the titanium femoral heads and the polyethylene cups and were responsible for wear of these surfaces. Although the wear of the femoral heads appeared substantial to naked eye examination, the surface finish of these surfaces remained within the British ISO standards for titanium alloy when assessed by the methods used above. This study concluded that direct contact between polyethylene and bone should be avoided in total hip arthroplasty and that ‘third body’ wear from bone particles occurred in these uncemented prostheses. Both components of this type of implant should be replaced at revision surgery and titanium should be avoided as a bearing surface in hip arthroplasty. Present methods of assessing the surface finish of titanium should be re-evaluated and more reliable ones considered.

In vitro measurement of strain in the bone cement surrounding the femoral component of total hip replacements during simulated gait and stair-climbing

1996 ◽  
Vol 14 (5) ◽  
pp. 769-777 ◽  
Author(s):  
Daniel O. O'Connor ◽  
Dennis W. Burke ◽  
Murali Jasty ◽  
Ronald C. Sedlacek ◽  
William H. Harris
Keyword(s):  
Bone Cement ◽  
Femoral Component ◽  
Stair Climbing ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Hip Replacements

scholarly journals In Vitro Evidence for Cell‐Accelerated Corrosion Within Modular Junctions of Total Hip Replacements

2019 ◽  
Vol 38 (2) ◽  
pp. 393-404 ◽  
Author(s):  
Divya Rani Bijukumar ◽  
Shruti Salunkhe ◽  
Dalton Morris ◽  
Abhijith Segu ◽  
Deborah J. Hall ◽  
...  
Keyword(s):  
Accelerated Corrosion ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Hip Replacements

Micro-Separation in Vitro Produces Clinically Relevant Wear of Ceramic-Ceramic Total Hip Replacements

2000 ◽  
Vol 192-195 ◽  
pp. 529-532 ◽  
Author(s):  
J. Nevelos ◽  
E. Ingham ◽  
Crispin Doyle ◽  
Robert Streicher ◽  
A. Nevelos ◽  
...  
Keyword(s):  
Total Hip ◽  
Total Hip Replacements ◽  
Hip Replacements

Long-Term Survival of Stanmore Total Hip Replacements Inserted with Radiolucent Bone Cement

2002 ◽  
Vol 12 (3) ◽  
pp. 274-280
Author(s):  
J.A. Wimhurst ◽  
J.L. Hobby ◽  
C.P. Roberts ◽  
A.N. Gibbs ◽  
L.J. Deliss ◽  
...  
Keyword(s):  
Bone Cement ◽  
In Vivo Studies ◽  
Long Term Results ◽  
Term Survival ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Hip Replacements

Radio-opacifiers in bone cements are an accepted part of every-day practice. They have, however, been shown to be a potential cause of an increase in third body wear and to excite bone resorption in in vitro and in vivo studies. We reviewed the results of 228 consecutive Stanmore total hip replacements performed between 1981 and 1985 in 211 patients. All were inserted with radiolucent bone cement. Information regarding whether the prosthesis had been revised was available for all patients. Seventy-three patients (83 hips) were still alive and 41 patients (44 hips) were sufficiently healthy to attend clinic. Information regarding pain level was obtained from the remaining 32 patients. When revision of the implant was taken as the end-point, there was 95% ten-year survival, 91% fifteen-year survival and 75% eighteen-year survival. These long-term results of Stanmore THRs, performed in a district general hospital, with radiolucent bone cement, compare favourably with the other published series for this implant. We did not find the inability to see the bone cement a particular disadvantage when reviewing radiographs for signs of loosening.

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