Posterior Wall Fragments in Acetabular Both‐Column Fractures: Morphology, Type, and the Significance of its Projection

Author:

Zhong Ziyi12,Feng Zihang1,Tong Kai1,Lin Shiyuan1,Yang Yunping1,Wang Gang1ORCID

Affiliation:

1. Department of Trauma Orthopedics, Nanfang Hospital Southern Medical University Guang Zhou China

2. Affiliated Dongguan People's Hospital Southern Medical University Dongguan China

Abstract

ObjectiveMost both‐column acetabular fractures are combined with posterior wall fragments. However, the morphology of this posterior wall is varied, and how to fix this posterior wall remains a controversial topic. To investigate the morphological characteristics of posterior wall fragments of both‐column acetabular fractures and select corresponding fixation methods.MethodsData from 352 patients with acetabular fractures admitted to the level one trauma centre in our hospital between January 2006 and December 2022 were collected. The morphology of posterior wall fragments was observed and analyzed in 83 cases of both‐column acetabular fractures and classified according to the consistency of posterior wall morphology. A fracture map of the posterior wall was created on a normal template according to the three morphological types of posterior wall fragments. Finally, the high‐incidence area of the posterior wall fracture was projected onto the iliac fossa and the medial side of the posterior column to guide the fixation of the posterior wall fragment using the anterior intrapelvic approach.ResultsFractures were divided into four types: I, large posterior wall fragment which was high in the ilium bone (34 cases, 41.0%); II, posterior wall fragment in the acetabular parietal region (18 cases, 21.7%); III, posterior wall marginal fracture (10 cases, 12.0%); and IV, non‐combined posterior wall fracture (21 cases, 25.3%). The most common morphologies of the posterior wall fragments of the first two types were mapped and projected onto the anterior iliac inner plate and medial side of the posterior column, where the corresponding area could be used to guide the insertion of the internal fixation.ConclusionBoth‐column acetabular fractures combined with posterior wall fractures can be divided into four types according to the morphology of the posterior wall fragment. Understanding the corresponding three‐dimensional morphology and projection position of different types of these fragments can help surgeons determine the position and orientation of internal fixation of posterior wall fractures.

Publisher

Wiley

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