Variation in Pelvic Morphology May Prevent the Identification of Anterior Pelvic Tilt

Preece, Stephen; Willan, P. L. T.; Nester, Christopher; Graham-Smith, Philip; Herrington, Lee; Bowker, P.

doi:10.1179/106698108790818459

Cited by 61 publications

(45 citation statements)

References 14 publications

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“…Further, soft tissue artifact can cause erroneous measurements of hip joint kinematics during dynamic loading for all anatomic planes, including rotation about the sagittal and coronal plane . It has also been shown that participant‐specific pelvic bony anatomy is necessary to measure in vivo pelvic tilt accurately . Though we cannot definitively attribute the discrepancies between our results and previous studies to the limitations and errors of skin marker motion capture, we are confident that hip kinematics reported herein were accurate given that errors for DF are submillimeter and subdegree …”

Section: Discussioncontrasting

confidence: 57%

In Vivo Pelvic and Hip Joint Kinematics in Patients With Cam Femoroacetabular Impingement Syndrome: A Dual Fluoroscopy Study

Atkins

Fiorentino

Hartle

et al. 2019

Journal Orthopaedic Research

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Femoroacetabular impingement syndrome (FAIS) may alter the kinematic function of the hip, resulting in pain and tissue damage. Previous motion analysis studies of FAIS have employed skin markers, which are prone to soft tissue artifact and inaccurate calculation of the hip joint center. This may explain why the evidence linking FAIS with deleterious kinematics is contradictory. The purpose of this study was to employ dual fluoroscopy (DF) to quantify in vivo kinematics of patients with cam FAIS relative to asymptomatic, morphologically normal control participants during various activities. Eleven asymptomatic, morphologically normal controls and seven patients with cam FAIS were imaged with DF during standing, level walking, incline walking, and functional range of motion activities. Model‐based tracking calculated the kinematic position of the hip by registering projections of three‐dimensional computed tomography models with DF images. Patients with FAIS stood with their hip extended (mean [95% confidence interval], −2.2 [−7.4, 3.1]°, flexion positive), whereas controls were flexed (5.3 [2.6, 8.0]°; p = 0.013). Male patients with cam FAIS had less peak internal rotation than the male control participants during self‐selected speed level‐walking (−0.2 [−6.5, 6.1]° vs. −9.8 [−12.2, −7.3]°; p = 0.007) and less anterior pelvic tilt at heel‐strike of incline (5°) walking (3.4 [−1.0, −7.9]° vs. 9.8 [6.4, 13.2]°; p = 0.032). Even during submaximal range of motion activities, such as incline walking, patients may alter pelvic motion to avoid positions that approximate the cam lesion and the acetabular labrum. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:823‐833, 2020

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Section: Discussioncontrasting

confidence: 57%

In Vivo Pelvic and Hip Joint Kinematics in Patients With Cam Femoroacetabular Impingement Syndrome: A Dual Fluoroscopy Study

Atkins

Fiorentino

Hartle

et al. 2019

Journal Orthopaedic Research

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“…The examiner then placed one caliper arm tip of the palpation meter on the anterior superior iliac spine and the other on the posterior superior iliac spine. An intraclass correlation coefficient of 0.92–0.99 has been reported for measurements of pelvic tilt using this technique 14, 15.…”

Section: Methodsmentioning

confidence: 76%

Influence of Obesity on Postural Stability in Young Adults

Son

2016

Osong Public Health and Research Perspectives

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ObjectivesThe purpose of this study was to determine whether obesity is associated with less postural stability in young adults, and whether it is influenced by anterior pelvic tilt angle and sensory dysfunction.MethodsCenter of gravity (COG) velocity and total sway distance with eyes open or eyes closed on firm or foam floors were determined in 12 obese individuals and 12 individuals with normal weight.ResultsOn firm and foam floors with eyes closed, center of gravity velocity and total sway distance were significantly greater in the obese group than in the normal-weight group. However, on firm and foam floors with eyes open, center of gravity velocity and total sway distance were not significantly different in the two groups.ConclusionThe clinical implication of our findings is that obese young adults exhibit poor postural stability. Our findings also suggested that postural instability in obese individuals is associated with increased lordosis due to abdominal fat and poor integration of plantar somatosensory input.

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“…Despite known differences in the shape of the pelvis according to sex and age171819 a single equation is currently used for all subjects. The aim of this study was to investigate whether sex and/or age specific regression equations improve the accuracy in locating the HJC.…”

mentioning

confidence: 99%

Predicting the location of the hip joint centres, impact of age group and sex

Hara

McGinley

Briggs

et al. 2016

Sci Rep

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Clinical gait analysis incorporating three-dimensional motion analysis plays a key role in planning surgical treatments in people with gait disability. The position of the Hip Joint Centre (HJC) within the pelvis is thus critical to ensure accurate data interpretation. The position of the HJC is determined from regression equations based on anthropometric measurements derived from relatively small datasets. Current equations do not take sex or age into account, even though pelvis shape is known to differ between sex, and gait analysis is performed in populations with wide range of age. Three dimensional images of 157 deceased individuals (37 children, 120 skeletally matured) were collected with computed tomography. The location of the HJC within the pelvis was determined and regression equations to locate the HJC were developed using various anthropometrics predictors. We determined if accuracy improved when age and sex were introduced as variables. Statistical analysis did not support differentiating the equations according to sex. We found that age only modestly improved accuracy. We propose a range of new regression equations, derived from the largest dataset collected for this purpose to date.

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Variation in Pelvic Morphology May Prevent the Identification of Anterior Pelvic Tilt

Cited by 61 publications

References 14 publications

In Vivo Pelvic and Hip Joint Kinematics in Patients With Cam Femoroacetabular Impingement Syndrome: A Dual Fluoroscopy Study

In Vivo Pelvic and Hip Joint Kinematics in Patients With Cam Femoroacetabular Impingement Syndrome: A Dual Fluoroscopy Study

Influence of Obesity on Postural Stability in Young Adults

Predicting the location of the hip joint centres, impact of age group and sex

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