Evaluation of acetabular stability in uncemented prostheses

Hugh J. Clarke; Riyaz H. Jinnah; Karen E. Warden; M. Biomed Eng; Quentin G.N. Cox; Mark J. Curtis

doi:10.1016/S0883-5403(06)80185-3

Evaluation of acetabular stability in uncemented prostheses

Hugh J. Clarke, Riyaz H. Jinnah, Karen E. Warden, M. Biomed Eng, Quentin G.N. Cox, Mark J. Curtis

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

24 Scopus citations

Abstract

The stability of two commonly used uncemented acetabular prostheses fixed with either pegs or screws has been established by evaluating the torque strengths in ten cadaveric acetabulae. The initial stability of implants to simulated frictional loads was satisfactory compared to previous estimations of the frictional torques in polyethylene-on-metal and metal-on-metal articulations. Testing of the torque required to produce 2^o of rotation at the bone-implant interface showed that the peg fixation required significantly greater loads than did the screw fixation (P<.03). Testing the prostheses to failure gave good results, although lower than previous cemented arthroplasty estimations. The margin of stability over the frictional torques that can be generated is such that it may affect the bony ingrowth into these prostheses. This may account for the common finding of fibrous ingrowth in these prostheses.

Original language	English (US)
Pages (from-to)	335-340
Number of pages	6
Journal	Journal of Arthroplasty
Volume	6
Issue number	4
DOIs	https://doi.org/10.1016/S0883-5403(06)80185-3
State	Published - 1991
Externally published	Yes

Keywords

micromotion
torsional acetabular stability
uncemented

ASJC Scopus subject areas

Orthopedics and Sports Medicine

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10.1016/S0883-5403(06)80185-3

Cite this

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title = "Evaluation of acetabular stability in uncemented prostheses",

abstract = "The stability of two commonly used uncemented acetabular prostheses fixed with either pegs or screws has been established by evaluating the torque strengths in ten cadaveric acetabulae. The initial stability of implants to simulated frictional loads was satisfactory compared to previous estimations of the frictional torques in polyethylene-on-metal and metal-on-metal articulations. Testing of the torque required to produce 2o of rotation at the bone-implant interface showed that the peg fixation required significantly greater loads than did the screw fixation (P<.03). Testing the prostheses to failure gave good results, although lower than previous cemented arthroplasty estimations. The margin of stability over the frictional torques that can be generated is such that it may affect the bony ingrowth into these prostheses. This may account for the common finding of fibrous ingrowth in these prostheses.",

keywords = "micromotion, torsional acetabular stability, uncemented",

author = "Clarke, {Hugh J.} and Jinnah, {Riyaz H.} and Warden, {Karen E.} and {Biomed Eng}, M. and Cox, {Quentin G.N.} and Curtis, {Mark J.}",

year = "1991",

doi = "10.1016/S0883-5403(06)80185-3",

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T1 - Evaluation of acetabular stability in uncemented prostheses

AU - Clarke, Hugh J.

AU - Jinnah, Riyaz H.

AU - Warden, Karen E.

AU - Biomed Eng, M.

AU - Cox, Quentin G.N.

AU - Curtis, Mark J.

PY - 1991

Y1 - 1991

N2 - The stability of two commonly used uncemented acetabular prostheses fixed with either pegs or screws has been established by evaluating the torque strengths in ten cadaveric acetabulae. The initial stability of implants to simulated frictional loads was satisfactory compared to previous estimations of the frictional torques in polyethylene-on-metal and metal-on-metal articulations. Testing of the torque required to produce 2o of rotation at the bone-implant interface showed that the peg fixation required significantly greater loads than did the screw fixation (P<.03). Testing the prostheses to failure gave good results, although lower than previous cemented arthroplasty estimations. The margin of stability over the frictional torques that can be generated is such that it may affect the bony ingrowth into these prostheses. This may account for the common finding of fibrous ingrowth in these prostheses.

AB - The stability of two commonly used uncemented acetabular prostheses fixed with either pegs or screws has been established by evaluating the torque strengths in ten cadaveric acetabulae. The initial stability of implants to simulated frictional loads was satisfactory compared to previous estimations of the frictional torques in polyethylene-on-metal and metal-on-metal articulations. Testing of the torque required to produce 2o of rotation at the bone-implant interface showed that the peg fixation required significantly greater loads than did the screw fixation (P<.03). Testing the prostheses to failure gave good results, although lower than previous cemented arthroplasty estimations. The margin of stability over the frictional torques that can be generated is such that it may affect the bony ingrowth into these prostheses. This may account for the common finding of fibrous ingrowth in these prostheses.

KW - micromotion

KW - torsional acetabular stability

KW - uncemented

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IS - 4

ER -

Evaluation of acetabular stability in uncemented prostheses

Abstract

Keywords

ASJC Scopus subject areas

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