Prospective clinical study using radiostereometric analysis (RSA) to evaluate fixation of a modular cemented polished femoral stem

C. Glen Richardson; Elise K. Laende; Michael Gross; Michael J. Dunbar

doi:10.1177/1120700019881429

Prospective clinical study using radiostereometric analysis (RSA) to evaluate fixation of a modular cemented polished femoral stem

C. Glen Richardson, Elise K. Laende, Michael Gross, Michael J. Dunbar

Medicine

Medicine

Research output: Contribution to journal › Article › peer-review

Abstract

Background: The long-term clinical success of cemented polished tapered femoral components has been demonstrated in prospective as well as registry studies. This stem design type has also been well studied with radiostereometric analysis (RSA) and provides a standard to evaluate alternative designs of polished tapered cemented femoral components. This prospective study evaluates the subsidence of a polished cemented stem with a modular neck design utilising RSA. Methods: 26 patients were prospectively enrolled in the study and 23 were available for RSA analysis at 2 years. Results: The average subsidence of the femoral implant was 1.1 mm (SD 0.4 mm) at 2 years post operation. There were no revisions in this group, specifically no failures of the modular stem-neck design as has been seen with other implants. Conclusions: The RSA subsidence pattern at 2 years of this cemented femoral stem is similar to other successful designs with long-term follow-up. The implications over time of stem neck modularity for cemented polished tapered femoral components requires further evaluation.

Original language	English
Pages (from-to)	191-195
Number of pages	5
Journal	HIP International
Volume	31
Issue number	2
DOIs	https://doi.org/10.1177/1120700019881429
Publication status	Published - Mar 2021

Bibliographical note

Funding Information:
The RSA subsidence pattern at 2 years of this cemented femoral stem is similar to other successful designs with long-term follow-up. The implications over time of stem neck modularity for cemented polished tapered femoral components requires further evaluation. Cemented fixation implant migration modular hip implant radiostereometric analysis total hip arthroplasty wright medical group https://doi.org/10.13039/100007616 edited-state corrected-proof The authors gratefully acknowledge the assistance of Sue Moore for patient recruitment and follow-up. Declaration of conflicting interests The following conflicts of interest are declared: GR: Paid consultancy (Stryker); paid speaking engagements (Stryker, Depuy). EL: Unpaid consultancy (Stryker). MG: Royalties (Microport). MD: Royalties and paid consultancy (Stryker). Funding This study was supported by an unrestricted research grant from Wright Medical Technologies, Inc.

Publisher Copyright:
© The Author(s) 2019.

ASJC Scopus Subject Areas

Surgery
Orthopedics and Sports Medicine

PubMed: MeSH publication types

Journal Article

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10.1177/1120700019881429

Cite this

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title = "Prospective clinical study using radiostereometric analysis (RSA) to evaluate fixation of a modular cemented polished femoral stem",

abstract = "Background: The long-term clinical success of cemented polished tapered femoral components has been demonstrated in prospective as well as registry studies. This stem design type has also been well studied with radiostereometric analysis (RSA) and provides a standard to evaluate alternative designs of polished tapered cemented femoral components. This prospective study evaluates the subsidence of a polished cemented stem with a modular neck design utilising RSA. Methods: 26 patients were prospectively enrolled in the study and 23 were available for RSA analysis at 2 years. Results: The average subsidence of the femoral implant was 1.1 mm (SD 0.4 mm) at 2 years post operation. There were no revisions in this group, specifically no failures of the modular stem-neck design as has been seen with other implants. Conclusions: The RSA subsidence pattern at 2 years of this cemented femoral stem is similar to other successful designs with long-term follow-up. The implications over time of stem neck modularity for cemented polished tapered femoral components requires further evaluation.",

author = "Richardson, {C. Glen} and Laende, {Elise K.} and Michael Gross and Dunbar, {Michael J.}",

note = "Funding Information: The RSA subsidence pattern at 2 years of this cemented femoral stem is similar to other successful designs with long-term follow-up. The implications over time of stem neck modularity for cemented polished tapered femoral components requires further evaluation. Cemented fixation implant migration modular hip implant radiostereometric analysis total hip arthroplasty wright medical group https://doi.org/10.13039/100007616 edited-state corrected-proof The authors gratefully acknowledge the assistance of Sue Moore for patient recruitment and follow-up. Declaration of conflicting interests The following conflicts of interest are declared: GR: Paid consultancy (Stryker); paid speaking engagements (Stryker, Depuy). EL: Unpaid consultancy (Stryker). MG: Royalties (Microport). MD: Royalties and paid consultancy (Stryker). Funding This study was supported by an unrestricted research grant from Wright Medical Technologies, Inc. Publisher Copyright: {\textcopyright} The Author(s) 2019.",

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AU - Richardson, C. Glen

AU - Laende, Elise K.

AU - Gross, Michael

AU - Dunbar, Michael J.

N1 - Funding Information: The RSA subsidence pattern at 2 years of this cemented femoral stem is similar to other successful designs with long-term follow-up. The implications over time of stem neck modularity for cemented polished tapered femoral components requires further evaluation. Cemented fixation implant migration modular hip implant radiostereometric analysis total hip arthroplasty wright medical group https://doi.org/10.13039/100007616 edited-state corrected-proof The authors gratefully acknowledge the assistance of Sue Moore for patient recruitment and follow-up. Declaration of conflicting interests The following conflicts of interest are declared: GR: Paid consultancy (Stryker); paid speaking engagements (Stryker, Depuy). EL: Unpaid consultancy (Stryker). MG: Royalties (Microport). MD: Royalties and paid consultancy (Stryker). Funding This study was supported by an unrestricted research grant from Wright Medical Technologies, Inc. Publisher Copyright: © The Author(s) 2019.

PY - 2021/3

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N2 - Background: The long-term clinical success of cemented polished tapered femoral components has been demonstrated in prospective as well as registry studies. This stem design type has also been well studied with radiostereometric analysis (RSA) and provides a standard to evaluate alternative designs of polished tapered cemented femoral components. This prospective study evaluates the subsidence of a polished cemented stem with a modular neck design utilising RSA. Methods: 26 patients were prospectively enrolled in the study and 23 were available for RSA analysis at 2 years. Results: The average subsidence of the femoral implant was 1.1 mm (SD 0.4 mm) at 2 years post operation. There were no revisions in this group, specifically no failures of the modular stem-neck design as has been seen with other implants. Conclusions: The RSA subsidence pattern at 2 years of this cemented femoral stem is similar to other successful designs with long-term follow-up. The implications over time of stem neck modularity for cemented polished tapered femoral components requires further evaluation.

AB - Background: The long-term clinical success of cemented polished tapered femoral components has been demonstrated in prospective as well as registry studies. This stem design type has also been well studied with radiostereometric analysis (RSA) and provides a standard to evaluate alternative designs of polished tapered cemented femoral components. This prospective study evaluates the subsidence of a polished cemented stem with a modular neck design utilising RSA. Methods: 26 patients were prospectively enrolled in the study and 23 were available for RSA analysis at 2 years. Results: The average subsidence of the femoral implant was 1.1 mm (SD 0.4 mm) at 2 years post operation. There were no revisions in this group, specifically no failures of the modular stem-neck design as has been seen with other implants. Conclusions: The RSA subsidence pattern at 2 years of this cemented femoral stem is similar to other successful designs with long-term follow-up. The implications over time of stem neck modularity for cemented polished tapered femoral components requires further evaluation.

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Prospective clinical study using radiostereometric analysis (RSA) to evaluate fixation of a modular cemented polished femoral stem

Abstract

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