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Posterior Displacement and Angulation of Displaced Lateral Clavicle Fractures: A 3-Dimensional Analysis

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Author(s)
Chul-Hyun ChoBeom-Soo KimDu-Han KimGu-Hee Jung
Keimyung Author(s)
Cho, Chul HyunKim, Beom SooKim, Du Han
Department
Dept. of Orthopedic Surgery (정형외과학)
Journal Title
Orthopaedic Journal of Sports Medicine
Issued Date
2020
Volume
8
Issue
11
Keyword
lateral clavicle fracturedisplacementpatternshoulder
Abstract
Background:
The management of lateral clavicle fractures is often challenging because of difficulties in identifying displacement patterns that indicate an unstable fracture.

Hypothesis:
The aim of this study was to evaluate displacement patterns through analysis using 3-dimensional (3D) rendering software for displaced lateral clavicle fractures. We hypothesized that most displaced lateral clavicle fractures would have posterior displacement and angulation as well as superior displacement of the medial fragment.

Study Design:
Cross-sectional study; Level of evidence, 3.

Methods:
Radiographs of 37 displaced lateral clavicle fractures were imported into the 3D rendering software to reconstruct the fracture model. For the computational simulation of fracture reduction, the medial fragment was manipulated and returned into place using the software's moving tools. Two corresponding points were marked between the medial and lateral fragments to measure 3D spatial location in the x-axis (shortening), y-axis (horizontal displacement), and z-axis (vertical displacement). The displacement angle on the cranial view was also measured based on the medial end of the clavicle.

Results:
There were 32 cases (86.5%) of superior displacement of the medial fragment (mean, 5.8 mm; range, –6.5 to 19.0 mm), 35 cases (94.6%) of posterior displacement of the medial fracture fragment (mean, 8.8 mm; range, –3.2 to 18.3 mm), and 23 cases (62.2%) of distraction of the fracture site (mean, 2.1 mm; range, –9.2 to 12.2 mm). All 37 patients revealed posterior angulation of the fracture site (mean, 8.9°; range, 2.2°-39.4°).

Conclusion:
Most displaced lateral clavicle fractures have posterior displacement and angulation as well as superior displacement of the medial fragment. Our results revealed that 3D evaluation of lateral clavicle fracture displacement patterns is useful for assessing fracture stability and making treatment decisions.
Keimyung Author(s)(Kor)
조철현
김범수
김두한
Publisher
School of Medicine (의과대학)
Citation
Chul-Hyun Cho et al. (2020). Posterior Displacement and Angulation of Displaced Lateral Clavicle Fractures: A 3-Dimensional Analysis. Orthopaedic Journal of Sports Medicine, 8(11), 2325967120964480. doi: 10.1177/2325967120964485
Type
Article
ISSN
2325-9671
Source
https://journals.sagepub.com/doi/10.1177/2325967120964485
DOI
10.1177/2325967120964485
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/43477
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학)
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