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Marked and rapid change of bone shape in acutely ACL injured knees - an exploratory analysis of the Kanon trial.

Abstract：

BACKGROUND:To investigate changes in knee 3D bone shape over the first 5 years after acute anterior cruciate ligament (ACL) injury in participants of the randomized controlled KANON-trial. METHODS:Serial MR images over 5 years from 121 young (32 women, mean age 26.1 years) adults with an acute ACL tear in a previously un-injured knee were analyzed using statistical shape models for bone. A matched reference cohort of 176 individuals was selected from the Osteoarthritis Initiative (OAI). Primary endpoint was change in bone area of the medial femoral condyle; exploratory analyses compared results by treatment and examined other knee regions. Comparisons were made using repeated measures mixed model ANOVA with adjustment for age, sex and body mass index (BMI). RESULTS:Mean medial femur bone area increased 3.2% (78.0 [95% CI 70.2 to 86.4] mm2) over 5 years after ACL injury and most prominently in knees treated with ACL reconstruction (ACLR). A higher rate of increase occurred over the first 2 years compared to the latter 3-years (66.2 [59.3 to 73.2] vs 17.6 [12.2 to 23.0] mm2) and was 6.7 times faster than in the reference cohort. The pattern and location of shape change in the extrapolated KANON data was very similar to that observed in another knee-osteoarthritis cohort. CONCLUSION:3D shape modelling after acute ACL injury revealed rapid bone shape changes, already evident at 3 months. The bone-change pattern after ACL injury demonstrated flattening and bone growth on the outer margins of the condyles similar to that reported in established knee osteoarthritis.

journal_name

Osteoarthritis Cartilage

journal_title

Osteoarthritis and cartilage

authors

Bowes MA,Lohmander LS,Wolstenholme CBH,Vincent GR,Conaghan PG,Frobell RB

doi

10.1016/j.joca.2018.12.021

subject

Has Abstract

pub_date

2019-04-01 00:00:00

pages

638-645

issue

4

eissn

1063-4584

issn

1522-9653

pii

S1063-4584(19)30019-6

journal_volume

27

pub_type

杂志文章,随机对照试验

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