The initial stability of uncemented acetabular components

M. J. Curtis; R. H. Jinnah; V. D. Wilson; D. S. Hungerford

doi:10.1302/0301-620x.74b3.1587880

The initial stability of uncemented acetabular components

M. J. Curtis, R. H. Jinnah, V. D. Wilson, D. S. Hungerford

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

118 Scopus citations

Abstract

The osseo-integration of an uncemented acetabular component depends on its initial stability. This is usually provided by under-reaming of the acetabulum. We have assessed the fixation of 52mm porous-coated hemispherical prostheses inserted into cadaveric acetabula under-reamed by 1, 2, 3 and 4mm. We tested the torsional stability of fixation, after preloading with 686N in compression, by measuring the torque required to produce 1° and 2° of rotation. Under-reaming by 2mm and 3mm gave significantly better fixation than 1mm (p<0.01, p<0.02). Insertion after under-reaming of 4mm caused some fractures. To obtain maximum interference fit and optimal implant stability, we recommend the use of an implant 2mm or 3mm larger than the last reamer.

Original language	English (US)
Pages (from-to)	372-376
Number of pages	5
Journal	Journal of Bone and Joint Surgery - Series B
Volume	74
Issue number	3
DOIs	https://doi.org/10.1302/0301-620x.74b3.1587880
State	Published - 1992
Externally published	Yes

ASJC Scopus subject areas

Surgery
Orthopedics and Sports Medicine

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10.1302/0301-620x.74b3.1587880

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title = "The initial stability of uncemented acetabular components",

abstract = "The osseo-integration of an uncemented acetabular component depends on its initial stability. This is usually provided by under-reaming of the acetabulum. We have assessed the fixation of 52mm porous-coated hemispherical prostheses inserted into cadaveric acetabula under-reamed by 1, 2, 3 and 4mm. We tested the torsional stability of fixation, after preloading with 686N in compression, by measuring the torque required to produce 1° and 2° of rotation. Under-reaming by 2mm and 3mm gave significantly better fixation than 1mm (p<0.01, p<0.02). Insertion after under-reaming of 4mm caused some fractures. To obtain maximum interference fit and optimal implant stability, we recommend the use of an implant 2mm or 3mm larger than the last reamer.",

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T1 - The initial stability of uncemented acetabular components

AU - Curtis, M. J.

AU - Jinnah, R. H.

AU - Wilson, V. D.

AU - Hungerford, D. S.

PY - 1992

Y1 - 1992

N2 - The osseo-integration of an uncemented acetabular component depends on its initial stability. This is usually provided by under-reaming of the acetabulum. We have assessed the fixation of 52mm porous-coated hemispherical prostheses inserted into cadaveric acetabula under-reamed by 1, 2, 3 and 4mm. We tested the torsional stability of fixation, after preloading with 686N in compression, by measuring the torque required to produce 1° and 2° of rotation. Under-reaming by 2mm and 3mm gave significantly better fixation than 1mm (p<0.01, p<0.02). Insertion after under-reaming of 4mm caused some fractures. To obtain maximum interference fit and optimal implant stability, we recommend the use of an implant 2mm or 3mm larger than the last reamer.

AB - The osseo-integration of an uncemented acetabular component depends on its initial stability. This is usually provided by under-reaming of the acetabulum. We have assessed the fixation of 52mm porous-coated hemispherical prostheses inserted into cadaveric acetabula under-reamed by 1, 2, 3 and 4mm. We tested the torsional stability of fixation, after preloading with 686N in compression, by measuring the torque required to produce 1° and 2° of rotation. Under-reaming by 2mm and 3mm gave significantly better fixation than 1mm (p<0.01, p<0.02). Insertion after under-reaming of 4mm caused some fractures. To obtain maximum interference fit and optimal implant stability, we recommend the use of an implant 2mm or 3mm larger than the last reamer.

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The initial stability of uncemented acetabular components

Abstract

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