Acetabular Alignment and Primary Arc of Motion for Minus, Skirtless, and Skirted 28-, 32-, 36-, and 40-mm Femoral Heads

Yona Kosashvili; Daniel Omoto; David Backstein; Oleg Safir; Dror Lakstein; Allan E. Gross

doi:10.1016/j.arth.2012.06.005

Acetabular Alignment and Primary Arc of Motion for Minus, Skirtless, and Skirted 28-, 32-, 36-, and 40-mm Femoral Heads

Yona Kosashvili^*, Daniel Omoto, David Backstein, Oleg Safir, Dror Lakstein, Allan E. Gross

^*Corresponding author for this work

Mount Sinai Hospital of University of Toronto

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

2 Scopus citations

Abstract

We examined the influence of acetabular cup alignment on the primary arc of motion (PAOM) for minus (- 3.5), skirtless (+. 3.5), and skirted (+. 10.5) neck lengths with 28-, 32-, 36-, and 40-mm femoral heads. Total hip arthroplasty was performed in a pelvic saw bone model. The acetabulum was positioned in 30°/45°/60° abduction and 0°/15°/30° anteversion, respectively. The PAOM was determined using a digital inclinometer for each of the acetabular positions and 12 femoral heads mentioned above. Best PAOM was found in 45° abduction and 15° to 30° anteversion as well as 60° abduction and 0° anteversion. Combinations of excessive abduction and anteversion as well as horizontalization and retroversion resulted in the worst PAOM. Primary arc of motion is mainly determined by cup alignment even when using larger femoral heads.

Original language	English
Pages (from-to)	279-285.e2
Journal	Journal of Arthroplasty
Volume	28
Issue number	2
DOIs	https://doi.org/10.1016/j.arth.2012.06.005
State	Published - Feb 2013
Externally published	Yes

Keywords

Acetabular alignment
Impingement
Large femoral heads
Primary arc of motion
Total hip arthroplasty

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10.1016/j.arth.2012.06.005

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title = "Acetabular Alignment and Primary Arc of Motion for Minus, Skirtless, and Skirted 28-, 32-, 36-, and 40-mm Femoral Heads",

abstract = "We examined the influence of acetabular cup alignment on the primary arc of motion (PAOM) for minus (- 3.5), skirtless (+. 3.5), and skirted (+. 10.5) neck lengths with 28-, 32-, 36-, and 40-mm femoral heads. Total hip arthroplasty was performed in a pelvic saw bone model. The acetabulum was positioned in 30°/45°/60° abduction and 0°/15°/30° anteversion, respectively. The PAOM was determined using a digital inclinometer for each of the acetabular positions and 12 femoral heads mentioned above. Best PAOM was found in 45° abduction and 15° to 30° anteversion as well as 60° abduction and 0° anteversion. Combinations of excessive abduction and anteversion as well as horizontalization and retroversion resulted in the worst PAOM. Primary arc of motion is mainly determined by cup alignment even when using larger femoral heads.",

keywords = "Acetabular alignment, Impingement, Large femoral heads, Primary arc of motion, Total hip arthroplasty",

author = "Yona Kosashvili and Daniel Omoto and David Backstein and Oleg Safir and Dror Lakstein and Gross, {Allan E.}",

year = "2013",

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AU - Kosashvili, Yona

AU - Omoto, Daniel

AU - Backstein, David

AU - Safir, Oleg

AU - Lakstein, Dror

AU - Gross, Allan E.

PY - 2013/2

Y1 - 2013/2

N2 - We examined the influence of acetabular cup alignment on the primary arc of motion (PAOM) for minus (- 3.5), skirtless (+. 3.5), and skirted (+. 10.5) neck lengths with 28-, 32-, 36-, and 40-mm femoral heads. Total hip arthroplasty was performed in a pelvic saw bone model. The acetabulum was positioned in 30°/45°/60° abduction and 0°/15°/30° anteversion, respectively. The PAOM was determined using a digital inclinometer for each of the acetabular positions and 12 femoral heads mentioned above. Best PAOM was found in 45° abduction and 15° to 30° anteversion as well as 60° abduction and 0° anteversion. Combinations of excessive abduction and anteversion as well as horizontalization and retroversion resulted in the worst PAOM. Primary arc of motion is mainly determined by cup alignment even when using larger femoral heads.

AB - We examined the influence of acetabular cup alignment on the primary arc of motion (PAOM) for minus (- 3.5), skirtless (+. 3.5), and skirted (+. 10.5) neck lengths with 28-, 32-, 36-, and 40-mm femoral heads. Total hip arthroplasty was performed in a pelvic saw bone model. The acetabulum was positioned in 30°/45°/60° abduction and 0°/15°/30° anteversion, respectively. The PAOM was determined using a digital inclinometer for each of the acetabular positions and 12 femoral heads mentioned above. Best PAOM was found in 45° abduction and 15° to 30° anteversion as well as 60° abduction and 0° anteversion. Combinations of excessive abduction and anteversion as well as horizontalization and retroversion resulted in the worst PAOM. Primary arc of motion is mainly determined by cup alignment even when using larger femoral heads.

KW - Acetabular alignment

KW - Impingement

KW - Large femoral heads

KW - Primary arc of motion

KW - Total hip arthroplasty

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Acetabular Alignment and Primary Arc of Motion for Minus, Skirtless, and Skirted 28-, 32-, 36-, and 40-mm Femoral Heads

Abstract

Keywords

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