Cargando…
Is labral hypotrophy correlated with increased acetabular depth?
Labral hypertrophy is a distinct feature in hip dysplasia. Occasionally, very small, hypotrophic labra are observed. However, there is no literature concerning this pathology. We investigated if the size of the labrum correlated with any radiologic parameters reflecting the amount of acetabular cove...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4718485/ https://www.ncbi.nlm.nih.gov/pubmed/27011836 http://dx.doi.org/10.1093/jhps/hnv034 |
_version_ | 1782410802660114432 |
---|---|
author | Toft, Felix Anliker, Elmar Beck, Martin |
author_facet | Toft, Felix Anliker, Elmar Beck, Martin |
author_sort | Toft, Felix |
collection | PubMed |
description | Labral hypertrophy is a distinct feature in hip dysplasia. Occasionally, very small, hypotrophic labra are observed. However, there is no literature concerning this pathology. We investigated if the size of the labrum correlated with any radiologic parameters reflecting the amount of acetabular coverage. It was hypothezised that there is a negative correlation between labrum size and acetabular coverage. Labra were categorized into three groups depending on the relation between length of the articular sided surface and height of bony attachment. Labra with a height:length ratio of 2 were classified as hypotrophic, with a height:length ratio of 1 as normal and with a ratio of 0.5 as hypertrophic. Labral cross-sectional areas (CSA) were measured on radial magnetic resonance imaging-arthrography slices using the measuring tool of the PACS system of 20 hips with hypotrophic labra (group 1), 20 hips with normal labral appearance (group 2) and 10 hips with hypertrophic labra (group 3). These values were then analyzed against following parameters: neck-shaft-angle (NSA), lateral center-edge angle (LCE), acetabular index (AI), femoral extrusion index (FEI) and acetabular retroversion index (ARI). Analyses of variance were used to determine differences in mean values between the three groups. Mean labral CSA differed significantly between all groups (group 1: 12.1 ± 2.9 mm(2); group 2: 25.2 ± 6.2 mm(2); group 3: 41.1 ± 12.3 mm(2); P < 0.001). NSA, LCE, AI and FEI all showed a significant difference between group 3 and 1 or 2. The ARI showed no difference between groups. Stepwise linear regression analyses showed a significant correlation between LCE angle and labral CSA with a corrected R(2)-value of 0.301. Labral CSA correlates with the LCE. No statistically significant difference between groups 1 and 2 concerning the LCE, AI or FEI could be identified. Nevertheless, group 1 had the highest mean coverage of all groups, hips with hypertrophic labra the lowest. |
format | Online Article Text |
id | pubmed-4718485 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-47184852016-03-23 Is labral hypotrophy correlated with increased acetabular depth? Toft, Felix Anliker, Elmar Beck, Martin J Hip Preserv Surg Research Articles Labral hypertrophy is a distinct feature in hip dysplasia. Occasionally, very small, hypotrophic labra are observed. However, there is no literature concerning this pathology. We investigated if the size of the labrum correlated with any radiologic parameters reflecting the amount of acetabular coverage. It was hypothezised that there is a negative correlation between labrum size and acetabular coverage. Labra were categorized into three groups depending on the relation between length of the articular sided surface and height of bony attachment. Labra with a height:length ratio of 2 were classified as hypotrophic, with a height:length ratio of 1 as normal and with a ratio of 0.5 as hypertrophic. Labral cross-sectional areas (CSA) were measured on radial magnetic resonance imaging-arthrography slices using the measuring tool of the PACS system of 20 hips with hypotrophic labra (group 1), 20 hips with normal labral appearance (group 2) and 10 hips with hypertrophic labra (group 3). These values were then analyzed against following parameters: neck-shaft-angle (NSA), lateral center-edge angle (LCE), acetabular index (AI), femoral extrusion index (FEI) and acetabular retroversion index (ARI). Analyses of variance were used to determine differences in mean values between the three groups. Mean labral CSA differed significantly between all groups (group 1: 12.1 ± 2.9 mm(2); group 2: 25.2 ± 6.2 mm(2); group 3: 41.1 ± 12.3 mm(2); P < 0.001). NSA, LCE, AI and FEI all showed a significant difference between group 3 and 1 or 2. The ARI showed no difference between groups. Stepwise linear regression analyses showed a significant correlation between LCE angle and labral CSA with a corrected R(2)-value of 0.301. Labral CSA correlates with the LCE. No statistically significant difference between groups 1 and 2 concerning the LCE, AI or FEI could be identified. Nevertheless, group 1 had the highest mean coverage of all groups, hips with hypertrophic labra the lowest. Oxford University Press 2015-07 2015-05-18 /pmc/articles/PMC4718485/ /pubmed/27011836 http://dx.doi.org/10.1093/jhps/hnv034 Text en © The Author 2015. Published by Oxford University Press. http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
spellingShingle | Research Articles Toft, Felix Anliker, Elmar Beck, Martin Is labral hypotrophy correlated with increased acetabular depth? |
title | Is labral hypotrophy correlated with increased acetabular depth? |
title_full | Is labral hypotrophy correlated with increased acetabular depth? |
title_fullStr | Is labral hypotrophy correlated with increased acetabular depth? |
title_full_unstemmed | Is labral hypotrophy correlated with increased acetabular depth? |
title_short | Is labral hypotrophy correlated with increased acetabular depth? |
title_sort | is labral hypotrophy correlated with increased acetabular depth? |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4718485/ https://www.ncbi.nlm.nih.gov/pubmed/27011836 http://dx.doi.org/10.1093/jhps/hnv034 |
work_keys_str_mv | AT toftfelix islabralhypotrophycorrelatedwithincreasedacetabulardepth AT anlikerelmar islabralhypotrophycorrelatedwithincreasedacetabulardepth AT beckmartin islabralhypotrophycorrelatedwithincreasedacetabulardepth |