International Orthopaedics

, Volume 42, Issue 12, pp 2761–2769 | Cite as

Coronal plane alignment of the lower limbs in patients with unilateral developmental hip dislocation

  • Zhendong Zhang
  • Hong Zhang
  • Dianzhong Luo
  • Hui Cheng
  • Kai Xiao
  • Shuxun HouEmail author
Original Paper



We aimed to identify the coronal plane alignment of lower limbs in patients with unilateral developmental hip dislocation (UDHD) and observe the difference between Hartofilakidis type II and III.

Patients and methods

The radiographic data of 76 patients who met the inclusion criteria were retrospectively reviewed, including the hip-knee-ankle angle (HKA), mechanical lateral distal femoral angle (mLDFA), anatomical lateral distal femoral angle (aLDFA), mechanical proximal tibial angle (MPTA), and lateral distal tibial angle (LDTA).


The valgus alignment on ipsilateral side was most frequently seen in both Hartofilakidis type II (51.3%) and type III groups (67.6%), whereas for the contralateral side, the neutral alignment in type II group (69.2%) and varus alignment in type III group (51.4%) were most commonly observed. Both the mLDFA and aLDFA of the ipsilateral side were significantly smaller than the contralateral side.


UDHD patients may present with lower limb malalignment on both sides. The ipsilateral valgus alignment is the most common deformity. On the contralateral side, Hartofilakidis type III patients may be more prone to be varus than type II patients. The lower limb malalignment and deformity of the ipsilateral distal femur should be considered during surgery involving hip, knee, or femur.


Developmental hip dislocation Unilateral Lower limb Alignment 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

We received the ethics committee review board approval from our institution before the initiation of this study.


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Copyright information

© SICOT aisbl 2018

Authors and Affiliations

  • Zhendong Zhang
    • 1
    • 2
  • Hong Zhang
    • 2
  • Dianzhong Luo
    • 2
  • Hui Cheng
    • 2
  • Kai Xiao
    • 2
  • Shuxun Hou
    • 2
    Email author
  1. 1.Medical School of Chinese People’s Liberation ArmyBeijingChina
  2. 2.Department of OrthopaedicsThe First Affiliated Hospital of Chinese People’s Liberation Army General HospitalBeijingChina

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