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Relationship between spinal sagittal alignment and acetabular coverage: a patient-matched control study.

Kensuke Fukushima¹, Masayuki Miyagi², Gen Inoue²

¹Department of Orthopaedic Surgery, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0374, Japan. kenfu@r4.dion.ne.jp.

Archives of Orthopaedic and Trauma Surgery

|July 5, 2018

Summary

This summary is machine-generated.

Patients with developmental dysplasia of the hip (DDH) exhibit greater sacral slope (SS) and lumbar lordosis (LL). This suggests DDH may cause anterior pelvic rotation to enhance acetabular coverage.

Keywords:

Acetabular dysplasia Hip arthroscopy Hip osteoarthritis Hip-spine syndrome Labral tear Periacetabular osteotomy Spinal alignment

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Area of Science:

Orthopedics
Spine Surgery
Hip Surgery

Background:

The relationship between spinal and hip joint alignment is significant but not fully understood.
Previous studies lacked control for factors influencing spinopelvic alignment.
Acetabular coverage's impact on spinal sagittal alignment requires further elucidation.

Purpose of the Study:

To investigate the effect of acetabular coverage on spinal sagittal alignment.
To compare spinopelvic parameters between patients with developmental dysplasia of the hip (DDH) and those with hip pain without DDH.

Main Methods:

Prospective enrollment of 30 women undergoing periacetabular osteotomy (PAO) for DDH and 30 women undergoing hip arthroscopic surgery (HAS) for labral tears.
Measurement of lateral center edge angle, sagittal vertical axis, pelvic tilt, pelvic incidence, sacral slope (SS), and lumbar lordosis (LL) from radiographs.
Comparison of clinical and radiologic data between the PAO and HAS groups.

Main Results:

No significant differences in age or body mass index between groups.
Significantly greater mean SS in the PAO group (41.6°) compared to the HAS group (35.3°).
Significantly greater mean LL in the PAO group (54.5°) compared to the HAS group (45.1°).

Conclusions:

Patients with DDH demonstrate increased SS and LL compared to those with hip pain without DDH.
Lumbar hyperlordosis may be a compensatory mechanism in DDH patients to achieve anterior pelvic rotation and enhance acetabular coverage.