Acetabular retroversion and cam morphology are contributing risk factors for posterior hip dislocation independent of the trauma mechanism.
Acetabular retroversion
FAI
Femoroacetabular impingement
Posterior hip dislocation
Traumatic hip dislocation
Journal
Archives of orthopaedic and trauma surgery
ISSN: 1434-3916
Titre abrégé: Arch Orthop Trauma Surg
Pays: Germany
ID NLM: 9011043
Informations de publication
Date de publication:
28 Sep 2024
28 Sep 2024
Historique:
received:
07
07
2024
accepted:
16
09
2024
medline:
28
9
2024
pubmed:
28
9
2024
entrez:
28
9
2024
Statut:
aheadofprint
Résumé
A high-energy trauma impact is generally considered the crucial factor causing native hip dislocation. However, femoroacetabular variations are assumed to contribute to low-energy posterior hip dislocations, especially in adolescent athletes. The study aimed to analyze the femoroacetabular morphology of adults who sustained traumatic posterior hip dislocations, comparing high-energy, sports-related, and low-energy trauma mechanisms. One hundred forty-one patients with traumatic posterior hip dislocations were analyzed and matched to a control group of 141 patients with high-energy trauma mechanisms without hip or pelvic injury, matched for age, gender, and Body Mass Index (BMI). The trauma mechanism was analyzed, and the femoroacetabular morphology and concomitant femoral head or posterior acetabular wall fractures were assessed using computed tomography (CT) scans. Acetabular version, coverage, and pincer morphology were evaluated by measuring the lateral center-edge angle, acetabular index, acetabular depth/width ratio, cranial and central acetabular version angles, and the anterior and posterior acetabular sector angles (AASA, PASA). The caput-collum-diaphyseal (CCD) angle and coronal and axial alpha angles were measured to detect cam morphology. A high-energy trauma caused posterior hip dislocations in 79.4%, sports-related mechanisms in 7.8%, and a low-energy impact in 12.8%. Patients with high-energy and sports-related dislocations exhibited a higher disposition for acetabular retroversion (p < 0.001). However, the acetabular version in low-energy mechanisms did not differ from the control group (p ≥ 0.05). Acetabular retroversion was associated with isolated dislocation, while acetabular overcoverage correlated with concomitant posterior acetabular wall fractures (p < 0.05). Alpha angles were significantly increased in patients with hip dislocations, independent of the trauma mechanism (p < 0.001). Acetabular retroversion contributes to posterior hip dislocation in high-energy and sports-related trauma mechanisms and decreases the likelihood of sustaining concomitant fractures. Acetabular morphology was subordinate to causing hip dislocation following a low-energy impact. Increased alpha angles were identified as a risk factor contributing to posterior hip dislocations, regardless of the trauma mechanism.
Identifiants
pubmed: 39340550
doi: 10.1007/s00402-024-05595-w
pii: 10.1007/s00402-024-05595-w
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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