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The anteroposterior axis of the tibia is adjusted to approximately a right angle to the anterior pelvic plane in the standing position in patients with hip dysplasia similar to normal subjects: a cross-sectional study

Authors :
Norio Imai
Dai Miyasaka
Hayato Suzuki
Kazuki Tsuchiya
Tomoyuki Ito
Izumi Minato
Naoto Endo
Source :
Journal of Orthopaedic Surgery and Research, Vol 13, Iss 1, Pp 1-7 (2018)
Publication Year :
2018
Publisher :
BMC, 2018.

Abstract

Abstract Background We previously described that the anteroposterior (AP) axis of the tibia is approximately perpendicular to the transverse axis of the anterior pelvic plane (APP) in the standing position in healthy subjects. The purpose of this study was to investigate the rotational alignment between the APP and clinical epicondylar axis and the AP axis of the tibia relative to pelvic coordination in the standing position in normal subjects and in women with developmental dysplasia of the hip (DDH) to aid decision making for surgeons in the alignment of implants in total hip or knee arthroplasty. Methods This study included 77 Japanese women. Twenty-nine in the DDH group underwent curved periacetabular osteotomy; 48 women without lumbago and knee pain were included in the normal group. Femoral neck anteversion (FNA), condylar twist angle, and knee rotation angle were measured in femoral coordination. The angle between the femoral neck axis and clinical epicondylar axis (CEA) was measured, the transverse axis of the APP was also measured, and the angle between the AP axis of the tibia and transverse axis of the APP was calculated. Results There was a moderate negative correlation between FNA and CEA relative to the APP. This finding indicated a trend towards greater FNA leading to more internal rotation. Knee rotation angle (KRA) relative to the APP was 1.65° ± 5.58° in the normal group and − 2.65° ± 7.57° in the DDH group. This finding indicated that the tibia AP axis was approximately perpendicular to the APP in the standing position both in the normal and DDH groups. Conclusion We found that the tibia AP axis was at approximately a right angle to the transverse axis of the APP in the standing position in both the normal and DDH groups, while the KRA was different in the normal and DDH groups. These findings may prove helpful for positional alignment investigations needed for implantation in total hip or knee arthroplasty and gait analysis.

Details

Language :
English
ISSN :
1749799X
Volume :
13
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Journal of Orthopaedic Surgery and Research
Publication Type :
Academic Journal
Accession number :
edsdoj.9fe882e9efa5455ea585787a1c0e140d
Document Type :
article
Full Text :
https://doi.org/10.1186/s13018-018-0816-z