The Influence of Alignment on Midterm Outcome after Total Knee Arthroplasty in Patients With Marked Coronal Femoral Bowing

Tsan Wen Huang; Ching Yu Lee; Shih Jie Lin; Mel S. Lee; Robert Wen Wei Hsu; Wun Jer Shen

doi:10.1016/j.arth.2015.03.027

The Influence of Alignment on Midterm Outcome after Total Knee Arthroplasty in Patients With Marked Coronal Femoral Bowing

Tsan Wen Huang, Ching Yu Lee, Shih Jie Lin, Mel S. Lee, Robert Wen Wei Hsu, Wun Jer Shen

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

21 Citations (Scopus)

Abstract

Whether the mechanical axis should be restored to neutral remains controversial when the patient has marked coronal femoral bowing. Eighty-four total knee arthroplasties were retrospectively reviewed. In the neutral-aligned group A the immediate postoperative mechanical axis of 179 ± 1° held stable (P = 0.841). The postoperative mechanical axis decreased from 176. ± 1° to 173. ± 1° (P = 0.024) in the outlier group. Progressive varus in the outlier group at follow-up was probably due implant instability and ligament imbalance as well as excessive polyethylene wear. At a mean follow-up of 75.8. months, no statistically significant difference was detected between the two groups. Long-term follow up will be needed to determine if the maintenance in radiographic results translates to better clinical outcomes.

Original language	English
Pages (from-to)	1531-1536
Number of pages	6
Journal	Journal of Arthroplasty
Volume	30
Issue number	9
DOIs	https://doi.org/10.1016/j.arth.2015.03.027
Publication status	Published - Sept 1 2015
Externally published	Yes

Keywords

Bowing of the femur
Implant longevity
Mechanical axis
Polyethylene wear
Total knee arthroplasty

ASJC Scopus subject areas

Orthopedics and Sports Medicine

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10.1016/j.arth.2015.03.027

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title = "The Influence of Alignment on Midterm Outcome after Total Knee Arthroplasty in Patients With Marked Coronal Femoral Bowing",

abstract = "Whether the mechanical axis should be restored to neutral remains controversial when the patient has marked coronal femoral bowing. Eighty-four total knee arthroplasties were retrospectively reviewed. In the neutral-aligned group A the immediate postoperative mechanical axis of 179 ± 1° held stable (P = 0.841). The postoperative mechanical axis decreased from 176. ± 1° to 173. ± 1° (P = 0.024) in the outlier group. Progressive varus in the outlier group at follow-up was probably due implant instability and ligament imbalance as well as excessive polyethylene wear. At a mean follow-up of 75.8. months, no statistically significant difference was detected between the two groups. Long-term follow up will be needed to determine if the maintenance in radiographic results translates to better clinical outcomes.",

keywords = "Bowing of the femur, Implant longevity, Mechanical axis, Polyethylene wear, Total knee arthroplasty",

author = "Huang, {Tsan Wen} and Lee, {Ching Yu} and Lin, {Shih Jie} and Lee, {Mel S.} and Hsu, {Robert Wen Wei} and Shen, {Wun Jer}",

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AU - Huang, Tsan Wen

AU - Lee, Ching Yu

AU - Lin, Shih Jie

AU - Lee, Mel S.

AU - Hsu, Robert Wen Wei

AU - Shen, Wun Jer

PY - 2015/9/1

Y1 - 2015/9/1

N2 - Whether the mechanical axis should be restored to neutral remains controversial when the patient has marked coronal femoral bowing. Eighty-four total knee arthroplasties were retrospectively reviewed. In the neutral-aligned group A the immediate postoperative mechanical axis of 179 ± 1° held stable (P = 0.841). The postoperative mechanical axis decreased from 176. ± 1° to 173. ± 1° (P = 0.024) in the outlier group. Progressive varus in the outlier group at follow-up was probably due implant instability and ligament imbalance as well as excessive polyethylene wear. At a mean follow-up of 75.8. months, no statistically significant difference was detected between the two groups. Long-term follow up will be needed to determine if the maintenance in radiographic results translates to better clinical outcomes.

AB - Whether the mechanical axis should be restored to neutral remains controversial when the patient has marked coronal femoral bowing. Eighty-four total knee arthroplasties were retrospectively reviewed. In the neutral-aligned group A the immediate postoperative mechanical axis of 179 ± 1° held stable (P = 0.841). The postoperative mechanical axis decreased from 176. ± 1° to 173. ± 1° (P = 0.024) in the outlier group. Progressive varus in the outlier group at follow-up was probably due implant instability and ligament imbalance as well as excessive polyethylene wear. At a mean follow-up of 75.8. months, no statistically significant difference was detected between the two groups. Long-term follow up will be needed to determine if the maintenance in radiographic results translates to better clinical outcomes.

KW - Bowing of the femur

KW - Implant longevity

KW - Mechanical axis

KW - Polyethylene wear

KW - Total knee arthroplasty

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The Influence of Alignment on Midterm Outcome after Total Knee Arthroplasty in Patients With Marked Coronal Femoral Bowing

Abstract

Keywords

ASJC Scopus subject areas

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