Comparison of the Primary Stability of Porous Tantalum and Titanium Acetabular Revision Constructs.

Beckmann, Nicholas A.; Bitsch, Rudi G; Schonhoff, Mareike; Siebenrock, Klaus-Arno; Schwarze, Martin; Jaeger, Sebastian (2020). Comparison of the Primary Stability of Porous Tantalum and Titanium Acetabular Revision Constructs. Materials, 13(7) Molecular Diversity Preservation International MDPI 10.3390/ma13071783

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Adequate primary stability of the acetabular revision construct is necessary for long-term implant survival. The difference in primary stability between tantalum and titanium components is unclear. Six composite hemipelvises with an acetabular defect were implanted with a tantalum augment and cup, using cement fixation between cup and augment. Relative motion was measured at cup/bone, cup/augment and bone/augment interfaces at three load levels; the results were compared to the relative motion measured at the same interfaces of a titanium cup/augment construct of identical dimensions, also implanted into composite bone. The implants showed little relative motion at all load levels between the augment and cup. At the bone/augment and bone/cup interfaces the titanium implants showed less relative motion than tantalum at 30% load (p < 0.001), but more relative motion at 50% (p = n.s.) and 100% (p < 0001) load. The load did not have a significant effect at the augment/cup interface (p = 0.086); it did have a significant effect on relative motion of both implant materials at bone/cup and bone/augment interfaces (p < 0.001). All interfaces of both constructs displayed relative motion that should permit osseointegration. Tantalum, however, may provide a greater degree of primary stability at higher loads than titanium. The clinical implication is yet to be seen.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

UniBE Contributor:

Beckmann, Nicholas Andreas and Siebenrock, Klaus-Arno

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1996-1944

Publisher:

Molecular Diversity Preservation International MDPI

Language:

English

Submitter:

Kathrin Aeschlimann

Date Deposited:

30 Dec 2020 10:42

Last Modified:

30 Dec 2020 10:51

Publisher DOI:

10.3390/ma13071783

PubMed ID:

32290103

Uncontrolled Keywords:

acetabular revision acetabulum hip arthroplasty hip replacement porous implants primary stability revision hip arthroplasty tantalum titanium

BORIS DOI:

10.48350/149026

URI:

https://boris.unibe.ch/id/eprint/149026

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