The effect of pelvic tilt and cam on hip range of motion in young elite skiers and nonathletes

Abstract The aim of this study was to determine (i) the reliability of hip range of motion measurement among experienced arthroscopic hip preservation surgeons and (ii) the magnitude of hip flexion change with posterior pelvic tilt. Five experienced arthroscopic hip preservation surgeons (5–18 years of hip surgery experience) performed passive hip range of motion (internal and external rotation), flexion (contralateral hip extended) and flexion with posterior pelvic tilt (contralateral hip maximally flexed) on five young healthy asymptomatic volunteers (three males, two females; 34.4 ± 10.7 years of age). Motion was measured via digital photography and goniometry. Inter-observer reliability was calculated via two-way mixed, single measures, intra-class correlation coefficient. Paired t-test was utilized to compare hip flexion (with contralateral hip extended) to hip flexion with posterior pelvic tilt (with contralateral hip in forced flexion). The reliabilities of measurements of hip flexion with posterior pelvic tilt and external rotation were excellent, that of hip flexion was fair, and that of hip internal rotation was poor. The magnitude of hip flexion increase with posterior pelvic tilt was 17.0° ± 3.0° (P < 0.001). The reliability of hip range of motion measurement by five experienced arthroscopic hip preservation surgeons was excellent for measures of hip flexion with posterior pelvic tilt and external rotation. Contralateral maximal hip flexion significantly increased ipsilateral hip flexion (approximately 17°). Level of Evidence: Diagnostic, level III (without consistently applied reference standard)

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Correlation Between Pelvic Tilt Angle, Hip Range Of Motion And Hip Muscles Torque Ratios

Medicine & Science in Sports & Exercise ◽

10.1249/01.mss.0000685864.60270.2f ◽

2020 ◽

Vol 52 (7S) ◽

pp. 948-948

Author(s):

Maria C. Herrera ◽

Tal Amasay ◽

Claire Egret ◽

Kathryn Ludwig

Keyword(s):

Range Of Motion ◽

Tilt Angle ◽

Pelvic Tilt ◽

Hip Range Of Motion ◽

Hip Muscles

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The Effect of Pelvic Tilt and Femoral Head Size on Hip Range-of-Motion to Impingement

The Journal of Arthroplasty ◽

10.1016/j.arth.2017.06.016 ◽

2017 ◽

Vol 32 (11) ◽

pp. 3544-3549 ◽

Cited By ~ 12

Author(s):

Thomas F. McCarthy ◽

Jim Nevelos ◽

Randa K. Elmallah ◽

Morad Chughtai ◽

Anton Khlopas ◽

...

Keyword(s):

Femoral Head ◽

Range Of Motion ◽

Pelvic Tilt ◽

Head Size ◽

Femoral Head Size ◽

Hip Range Of Motion

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Femoral stem neck geometry determines hip range of motion shape

Bone and Joint Research ◽

10.1302/2046-3758.1012.bjr-2021-0273.r1 ◽

2021 ◽

Vol 10 (12) ◽

pp. 780-789

Author(s):

Aidin Eslam Pour ◽

Jean Yves Lazennec ◽

Kunj P. Patel ◽

Manan P. Anjaria ◽

Paul Edgar Beaulé ◽

...

Keyword(s):

Range Of Motion ◽

Pelvic Tilt ◽

External Rotation ◽

Femoral Stem ◽

Implant Design ◽

Secondary Outcome ◽

Hip Range Of Motion ◽

The Mean ◽

The Difference ◽

Prosthetic Impingement

Aims In computer simulations, the shape of the range of motion (ROM) of a stem with a cylindrical neck design will be a perfect cone. However, many modern stems have rectangular/oval-shaped necks. We hypothesized that the rectangular/oval stem neck will affect the shape of the ROM and the prosthetic impingement. Methods Total hip arthroplasty (THA) motion while standing and sitting was simulated using a MATLAB model (one stem with a cylindrical neck and one stem with a rectangular neck). The primary predictor was the geometry of the neck (cylindrical vs rectangular) and the main outcome was the shape of ROM based on the prosthetic impingement between the neck and the liner. The secondary outcome was the difference in the ROM provided by each neck geometry and the effect of the pelvic tilt on this ROM. Multiple regression was used to analyze the data. Results The stem with a rectangular neck has increased internal and external rotation with a quatrefoil cross-section compared to a cone in a cylindrical neck. Modification of the cup orientation and pelvic tilt affected the direction of projection of the cone or quatrefoil shape. The mean increase in internal rotation with a rectangular neck was 3.4° (0° to 7.9°; p < 0.001); for external rotation, it was 2.8° (0.5° to 7.8°; p < 0.001). Conclusion Our study shows the importance of attention to femoral implant design for the assessment of prosthetic impingement. Any universal mathematical model or computer simulation that ignores each stem’s unique neck geometry will provide inaccurate predictions of prosthetic impingement. Cite this article: Bone Joint Res 2021;10(12):780–789.

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Hip range of motion during daily activities in patients with posterior pelvic tilt from supine to standing position

Journal of Orthopaedic Research® ◽

10.1002/jor.22799 ◽

2015 ◽

Vol 33 (4) ◽

pp. 542-547 ◽

Cited By ~ 6

Author(s):

Satoru Tamura ◽

Hidenobu Miki ◽

Kosuke Tsuda ◽

Masaki Takao ◽

Asaki Hattori ◽

...

Keyword(s):

Range Of Motion ◽

Pelvic Tilt ◽

Standing Position ◽

Daily Activities ◽

Hip Range Of Motion

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Post-operative Virtual Range of Motion in Robotic-assisted THA Patients to determine Pre-operative Simulation Needs

10.29007/ld57 ◽

2020 ◽

Author(s):

Matthew Thompson ◽

Roopa Guttal ◽

Shon Darcy ◽

Akshay Alaghatta ◽

Andrea Marcovigi ◽

...

Keyword(s):

Range Of Motion ◽

Pelvic Tilt ◽

Robotic Assisted ◽

Total Hip ◽

Bony Impingement ◽

Hip Range Of Motion ◽

Patient Reported ◽

Pelvic Position ◽

Hip Arthroplasties ◽

Stem Version

For preoperative simulations of hip range of motion to be useful in predicting complications after total hip arthroplasty (THA), the factors that could affect post-operative function must be considered including, but not limited to, bony impingement, pelvic position, and implanted vs. planned differences. This study retrospectively simulates ranges of motion to prosthetic and bony impingement of THA patients with known planned and implanted component positions and pelvic tilt to determine the factors and needs to accurately simulate range of motion preoperatively.Twenty-two (22) anterolateral, cementless total hip arthroplasties were performed using robotic-arm assisted technology which allowed capture of the implanted stem version and position in addition to robotic-assisted cup placement to plan. With the known implanted positions and preoperative 3-dimentional (3D) bone models, six (6) hip maneuvers were virtually simulated in custom software. Correlations were evaluated between planned and implanted component positions, pelvic tilt, ranges of motion, and patient-reported outcomes.Average ranges of motion to impingement were similar to those of previous simulation and navigation studies. Supine tilt varied from -10 ̊ (posterior) to 15 ̊ (anterior) with an average of 3.4±6.6 ̊. Very little correlation was seen between native or planned stem version and implanted stem version. Correlations were seen between some maneuvers such as internal rotation (IR) at 90 degrees flexion (F) (IR@90F) and combined component version and pelvic tilt. Bony impingement occurred during IR@90F in 9 of the 22cases. Pelvic tilt assessment, bony impingement detection, better prediction of implanted component position or the ability to execute a plan, such as robotically, would all provide a more accurate pre-operative simulation of the post-operative patient’s function.

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