Evaluation of anatomical pelvic parameters between normal, healthy men and women using three-dimensional computed tomography: a cross-sectional study of sex-specific and age-specific differences

Journal of Orthopaedic Surgery and Research

卷:14

Kazuki Tsuchiya¹  Norio Imai²  Hayato Suzuki³  Asami Nozaki³  Naoto Endo³  Dai Miyasaka³  Izumi Minato⁴  Tomoyuki Ito⁵ 

[1] Division of Advanced Materials Science and Technology, Niigata University Graduate School of Science and Technology;

[2] Division of Comprehensive Geriatrics in Community, Niigata University Graduate School of Medical and Dental Sciences;

[3] Division of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Sciences;

[4] Division of Orthopedic Surgery, Niigata Riko Hospital;

[5] Division of Orthopedic Surgery, Saiseikai Niigata Daini Hospital;

关键词: Pelvic incidence;    Pelvic tilt;    Sacral slope;    Three-dimensional measurement;    Measurement error;    Pelvic morphological parameters;   

DOI  :  10.1186/s13018-019-1165-2

来源: DOAJ

【 摘 要 】

Abstract Background Sagittal spinal balance and standing posture are affected by pelvic morphology, especially pelvic incidence (PI). However, it is not difficult to identify the hip center because of overlap of the pelvis, image contrast, and soft tissue artifacts. Measurements of PI are not always suitable in all patients, especially those with osteoarthritis of the hip joint whose femoral head is nonspherical, subluxed, or dislocated. We measured PI, pelvic tilt (PT), and sacral slope (SS) as anatomical parameters using a novel three-dimensional measurement in order to compare the pelvic morphology between normal, healthy men and women. Methods In this cross-sectional study, we evaluated 108 Japanese subjects (55 men, 53 women) without low back or knee pain. We used the three-dimensional pelvis model adjusted to the anterior pelvic plane and measured the pelvic parameters. The subjects were stratified by age (< 50 versus ≥ 50 years) and sex. Intraobserver and interobserver reliabilities were calculated with intraclass correlation coefficients. Results There was no significant difference in PI, anatomical-PT, and anatomical-SS between sexes. There was a strong correlation between PI and anatomical-SS in men and women (R = 0.790 and 0.715, respectively). Values of anatomical-PT were lower, and values of anatomical-SS were greater among older subjects than among younger subjects; the value of PI was similar between younger and older subjects. Intraobserver and interobserver mean absolute differences were about 2 mm and 2°, respectively; the intraclass correlation coefficient was > 0.87. Conclusions We found a strong correlation between PI and anatomical-SS in men and women. This novel measurement concept may be useful to estimate PI from anatomical-SS because the measurements of PI are not always suitable in all patients, especially those with osteoarthritis of the hip joint whose femoral head is not spherical or whose femoral head is subluxed or dislocated. This is the first report to describe the relationship between PI, anatomical-PT, and anatomical-SS as morphologic parameters with a high interclass correlation coefficient for intraobserver and interobserver reliabilities.

【 授权许可】

Unknown