Wear analysis of unicondylar mobile bearing and fixed bearing knee systems: A knee simulator study

Kretzer, Jan Philippe; Jakubowitz, Eike; Reinders, Joern; Lietz, E.; Moradi, Babak; Hofmann, Kerstin; Sonntag, Robert

doi:10.1016/j.actbio.2010.09.031

Cited by 68 publications

(62 citation statements)

References 37 publications

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“…[6,7]; however, the tribological behaviour of a prosthesis is deeply influenced by the implant design. An intra-operative variable that is recognised to impact on the load pattern as well as the tribological performance of the prosthesis is the sizing [24].…”

Section: Discussionmentioning

confidence: 99%

“…A proper choice of the prosthesis design and size is of paramount importance for TKR success [11]. Nowadays several TKP designs, shapes and sizes have been conceived, in order to fit most patient anatomies and with the final aim to lessen implant wear [6,12]. A surgeon can choose between two types of tibial inserts, which differentiate fixed and mobile TKP.…”

Section: Introductionmentioning

confidence: 99%

“…The wear of ultra-high molecular weight polyethylene (UHMWPE) prosthesis and its overall performance is influenced by many variables (including lubricant, load, sliding distance, design, patient weight, etc. ), so that a pre-clinical wear test could be used to simulate in vitro the interaction between these factors [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Toward the interpretation of the combined effect of size and body weight on the tribological performance of total knee prostheses

Battaglia

Taddei

Tozzi

et al. 2014

International Orthopaedics (SICOT)

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Purpose The research questions of the present study were: (1) Is total knee prosthesis wear behaviour influenced by implant size, body weight and their combined effect? (2) Are these findings significant and helpful from a clinical point of view? Methods Two very different sizes of the same total knee prosthesis (TKP), previously tested with ISO 14243 parameters, were tested on a knee simulator for a further two million cycles using a modified ISO 14243 load waveform. Roughness examination was performed on the metallic components. Gravimetric and micro-Raman spectroscopic analyses were carried out on the polyethylene inserts. Results The average volumetric mass loss was 69 ± 3 mm 3 and 88 ± 4 mm 3 for smaller and bigger size, respectively. Bigger TKPs are little influenced by an increased load, while the wear trend of the smaller TKP showed a redoubled slope, and more significant morphology changes were observed. However, the two sizes seem to behave similarly when subjected to a load increase of 15 %; the slope of the volumetric mass loss trend was comparable for the two sets of inserts, which did not appear significantly different also at the molecular level. Roughness average parameters of the lateral femoral condyle support this evidence. Conclusions It can be asserted that the body weight and implant size are relevant to the understanding of TKP wear behaviour. A post-implantation body weight increase in a patient with smaller knee dimensions could results in more critical effects on prosthesis long-term performance.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toward the interpretation of the combined effect of size and body weight on the tribological performance of total knee prostheses

Battaglia

Taddei

Tozzi

et al. 2014

International Orthopaedics (SICOT)

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“…Für die Univation-Prothese mit einem Fixed-bearing-Design (Aesculap, Tuttlingen, Deutschland) wurde über Verschleißra-ten von 8,6 und 7,51 mg/Mio. Zyklen berichtet [17,19].…”

Section: Abb 3 8 Abriebrate Im Medialen Und Lateralen Kompartiment Iunclassified

Reduziert ein erhöhter tibialer Slope den Abrieb bei unikondylären Schlittenprothesen?

et al. 2012

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An increase in the tibial slope leads to a reduced wear rate in a mobile-bearing UKA. Therefore, at least for this mobile-bearing UKA a higher tibial slope seems favorable to reduce the wear. However, before an optimal position of the tibial slope can be recommended, further investigations are required to evaluate the influence of the tibial slope on other factors, such as the ligament tension or the strain on the lateral compartment.

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“…Unicondylar knee arthroplasty (UKA) is being used with increasing frequency in anteromedial compartment arthrosis (1,2). In one of the initial studies about UKA done in 1989, Kozinn et al claimed that patellofemoral arthrosis formed a relative contraindication for UKA (3,4).…”

Section: Introductionmentioning

confidence: 99%

Impact of Fixed-Bearing and Mobile-Bearing Tibial Insert in Unicondylar Knee Arthroplasty

Çatma¹,

Aksekili²,

Kılınçarslan³

et al. 2016

Acta Med Anatol

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Wear analysis of unicondylar mobile bearing and fixed bearing knee systems: A knee simulator study

Cited by 68 publications

References 37 publications

Toward the interpretation of the combined effect of size and body weight on the tribological performance of total knee prostheses

Toward the interpretation of the combined effect of size and body weight on the tribological performance of total knee prostheses

Reduziert ein erhöhter tibialer Slope den Abrieb bei unikondylären Schlittenprothesen?

Impact of Fixed-Bearing and Mobile-Bearing Tibial Insert in Unicondylar Knee Arthroplasty

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