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European Radiology
Erschienen in: European Radiology 3/2017

28.06.2016 | Musculoskeletal

Injury patterns of medial patellofemoral ligament after acute lateral patellar dislocation in children: Correlation analysis with anatomical variants and articular cartilage lesion of the patella

verfasst von: Guang-ying Zhang, Lei Zheng, Hao Shi, Bing-jun Ji, Yan Feng, Hong-yu Ding

Erschienen in: European Radiology | Ausgabe 3/2017

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Abstract

Objectives

To assess the relationship between injury patterns of medial patellofemoral ligament (MPFL) and anatomical variants and patellar cartilage lesions after acute lateral patellar dislocation (LPD) in children.

Methods

MR images were obtained in 140 children with acute LPD. Images were acquired and evaluated using standardised protocols.

Results

Fifty-eight cases of partial MPFL tear and 75 cases of complete MPFL tear were identified. Injuries occurred at an isolated patellar insertion (PAT) in 52 cases, an isolated femoral attachment (FEM) in 42 cases and an isolated mid-substance (MID) in five cases. More than one site of injury was identified in 34 cases. Compared with Wiberg patellar type C, Wiberg patellar type B predisposed to complete MPFL tear (P = 0.042). No correlations were identified between injury patterns of MPFL and trochlear dysplasia, patellar height and tibial tuberosity-trochlear groove distance (P > 0.05). Compared with partial MPFL tear, complete MPFL tear predisposed to Grade-IV and Grade-V patellar chondral lesion (P = 0.02). There were no correlations between incidence of patellar cartilage lesion and injury locational-subgroups of MPFL (P = 0.543).

Conclusions

MPFL is most easily injured at the PAT in children. Wiberg patellar type B predisposes to complete MPFL tear. Complete MPFL tear predisposes to a higher grade of patellar chondral lesion.

Key Points

• MPFL is most easily injured at its patellar insertion in children.
• Wiberg patellar type B predisposes to complete MPFL tear.
• No correlations between injury patterns of MPFL and other three anatomical variants.
• Complete MPFL tear predisposes to higher grade patellar chondral lesion.
• No correlations between injury locations of MPFL and patellar cartilage lesion.
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Metadaten
Titel
Injury patterns of medial patellofemoral ligament after acute lateral patellar dislocation in children: Correlation analysis with anatomical variants and articular cartilage lesion of the patella
verfasst von
Guang-ying Zhang
Lei Zheng
Hao Shi
Bing-jun Ji
Yan Feng
Hong-yu Ding
Publikationsdatum
28.06.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
European Radiology / Ausgabe 3/2017
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-016-4473-5

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