Correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-12

AUTHORS

Simon Tiziani, Georg Osterhoff, Jan-Farei Campagna, Clément M. L. Werner

ABSTRACT

Background: Knowledge of periacetabular anatomy is crucial for prosthetic cup placement in total hip arthroplasty and for screw placement in anterior fixation with acetabular fractures. It is known that degree of hip dysplasia correlates with medial bone stock and that medial bone stock shows a weak correlation to Lequesne's acetabular index (AI). Aim of this study was to investigate a possible correlation between AI and the newly proposed medial safe zone. Methods: AI and the medial save zone were measured on 419 hips using a computed-tomography scan of the pelvis. AI was assessed on a 2D reconstructed anterior-posterior view of the pelvis using VOXAR™. Correlation was measured using the Pearson correlation coefficient. Results: Mean AI was 4.2 degrees (SD 4.9 degrees). Mean medial safe zone was 8.1 mm (SD 1.9 mm). There was a significant correlation between AI and medial save space with a Pearson correlation coefficient r = 0.33 (p = .001). Conclusion: There is a weak correlation between AI and medial safe zone. AI should not be used to predict medial safe zone. Due to the weakness in correlation AI is not suited for predicting medial safe zone. However, a low or negative AI can be a warning sign for less medial safe zone, prompting surgeons to take care when reaming in THA or placing periacetabular screws. More... »

PAGES

13

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s13037-019-0192-6

DOI

http://dx.doi.org/10.1186/s13037-019-0192-6

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112765485

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30918530


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