Abstract:
:The objective was to analyze the compensatory effect of the pelvis and lower extremities on sagittal spinal malalignment in patients with pelvic incidence (PI) and lumbar lordosis (LL) mismatch. A series of parameters including PI, LL, PI-LL, thoracic kyphosis (TK), pelvic tilt (PT), sacral slope (SS), knee flexion angle (KFA), tibial obliquity angle (TOA), femoral obliquity angle (FOA), femur pelvis angle (FPA) and pelvic shift (PS) were measured. Patients with PI-LL mismatch were divided into pelvic retroversion group and pelvic retroposition group based on their PT and PS, and then the parameters were compared within the two groups and with the control group. All variables were significantly different when comparing the pelvic retroversion and retroposition group with the control group except for PI, FOA and PS in the pelvic retroversion group. The pelvic retroposition group had significantly greater value of PI-LL, PI, PT, KFA, FOA and PS and contribution ratio of FOA and PS, and smaller value of LL, TK and FPA and contribution ratio of PT, TOA and FPA compared with the pelvic retroversion group. Patients with lesser PI-LL mismatch rely more on hip extension to increase pelvic retroversion while those with greater PI-LL mismatch tend to add extra femoral obliquity. When compensating for larger PI-LL mismatch, the importance of hip extension is decreased and the effect of the knee and ankle joint becomes more important by providing greater femoral incline and relatively lesser ankle dorsiflexion respectively.
journal_name
Gait Posturejournal_title
Gait & postureauthors
Cheng X,Zhang K,Sun X,Zhao C,Li H,Zhao Jdoi
10.1016/j.gaitpost.2017.04.041subject
Has Abstractpub_date
2017-07-01 00:00:00pages
14-18eissn
0966-6362issn
1879-2219pii
S0966-6362(17)30174-1journal_volume
56pub_type
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