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Total Hip Prostheses in Standing, Sitting and Squatting Positions: An Overview of Our 8 Years Practice Using the EOS Imaging Technology.

Lazennec JY, Rousseau MA, Brusson A, Folinais D, Amel M, Clarke I, Pour AE - Open Orthop J (2015)

Bottom Line: More total hip arthroplasty (THA) is performed worldwide and especially in younger and more active patients compared to earlier decades.Our results will be compared and confronted with the actual literature about this innovative technology.We shall especially emphasize our experience about patients with abnormal posture and the evolution of the subject over time, because the phenomenon of an aging spine is frequently associated with the process of aging hips.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedic and Trauma Surgery, Pitié-Salpétrière Hospital, Assistance Publique - Hopitaux de Paris, UPMC, 47-83 Boulevard de l'hôpital, 75013 Paris, France ; BiomechanicsLab (LBM), Arts et Metiers Paris-Tech, Paris, France ; Department of Anatomy, UPMC, 105 Boulevard de l'hôpital, 75013 Paris, France.

ABSTRACT
More total hip arthroplasty (THA) is performed worldwide and especially in younger and more active patients compared to earlier decades. One of the focuses of THA research in the future will be on optimizing the radiological follow-up of these patients using 2D and 3D measurements of implants position while reducing the radiation dose delivered. Low-dose EOS(®) imaging is an innovative slot-scanning radiograph system providing valuable information in patient functional positions (standing, sitting and even squatting positions). EOS has been proven accurate and reliable without significant inconvenience caused by the metallic artifacts of implants. The ability to obtain precise data on implant orientation according to the patient posture opens new perspectives for a comprehensive analysis of the pelvic frontal and sagittal balance and its potential impact on implants function and failures. We report our 8 years experience on our first 300 THA patients using this technology routinely for pre and post op evaluation. Our results will be compared and confronted with the actual literature about this innovative technology. We shall especially emphasize our experience about patients with abnormal posture and the evolution of the subject over time, because the phenomenon of an aging spine is frequently associated with the process of aging hips.

No MeSH data available.


A forward tilt of the pelvis (pelvis anterior rotation or pelvic flexion) as in standing position induces retroversion of theacetabulum, whereas a backward tilt of the pelvis (pelvis posterior rotation or pelvic extension) as in sitting position results in an anteversionof the acetabulum. The forward tilt of the pelvis is expressed by the low value of sacral slope (SS) in standing position, whereas thebackward tilt is associated with a higher sacral slope angle.
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Figure 12: A forward tilt of the pelvis (pelvis anterior rotation or pelvic flexion) as in standing position induces retroversion of theacetabulum, whereas a backward tilt of the pelvis (pelvis posterior rotation or pelvic extension) as in sitting position results in an anteversionof the acetabulum. The forward tilt of the pelvis is expressed by the low value of sacral slope (SS) in standing position, whereas thebackward tilt is associated with a higher sacral slope angle.

Mentions: The notion of a relationship between sectional acetabular AV and the position of the pelvis has been previously reported in native hips [32] and in THA [33,34]. A forward tilt of the pelvis (pelvis anterior rotation or pelvic flexion) induces retroversion of the acetabulum, whereas a backward tilt of the pelvis (pelvis posterior rotation or pelvic extension) results in an anteversion of the acetabulum (Fig. 12). Lumbosacral junction mobility is the main parameter influencing the variations of AV between the standing and sitting positions. This parameter seems strongly relevant as degenerative phenomena in the aging spine induce progressive changes in sagittal balance with loss of lumbar lordosis and pelvic extension [18,19]. This evolution could partially explain the cumulative increase of dislocation risk with time [34].


Total Hip Prostheses in Standing, Sitting and Squatting Positions: An Overview of Our 8 Years Practice Using the EOS Imaging Technology.

Lazennec JY, Rousseau MA, Brusson A, Folinais D, Amel M, Clarke I, Pour AE - Open Orthop J (2015)

A forward tilt of the pelvis (pelvis anterior rotation or pelvic flexion) as in standing position induces retroversion of theacetabulum, whereas a backward tilt of the pelvis (pelvis posterior rotation or pelvic extension) as in sitting position results in an anteversionof the acetabulum. The forward tilt of the pelvis is expressed by the low value of sacral slope (SS) in standing position, whereas thebackward tilt is associated with a higher sacral slope angle.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4384273&req=5

Figure 12: A forward tilt of the pelvis (pelvis anterior rotation or pelvic flexion) as in standing position induces retroversion of theacetabulum, whereas a backward tilt of the pelvis (pelvis posterior rotation or pelvic extension) as in sitting position results in an anteversionof the acetabulum. The forward tilt of the pelvis is expressed by the low value of sacral slope (SS) in standing position, whereas thebackward tilt is associated with a higher sacral slope angle.
Mentions: The notion of a relationship between sectional acetabular AV and the position of the pelvis has been previously reported in native hips [32] and in THA [33,34]. A forward tilt of the pelvis (pelvis anterior rotation or pelvic flexion) induces retroversion of the acetabulum, whereas a backward tilt of the pelvis (pelvis posterior rotation or pelvic extension) results in an anteversion of the acetabulum (Fig. 12). Lumbosacral junction mobility is the main parameter influencing the variations of AV between the standing and sitting positions. This parameter seems strongly relevant as degenerative phenomena in the aging spine induce progressive changes in sagittal balance with loss of lumbar lordosis and pelvic extension [18,19]. This evolution could partially explain the cumulative increase of dislocation risk with time [34].

Bottom Line: More total hip arthroplasty (THA) is performed worldwide and especially in younger and more active patients compared to earlier decades.Our results will be compared and confronted with the actual literature about this innovative technology.We shall especially emphasize our experience about patients with abnormal posture and the evolution of the subject over time, because the phenomenon of an aging spine is frequently associated with the process of aging hips.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedic and Trauma Surgery, Pitié-Salpétrière Hospital, Assistance Publique - Hopitaux de Paris, UPMC, 47-83 Boulevard de l'hôpital, 75013 Paris, France ; BiomechanicsLab (LBM), Arts et Metiers Paris-Tech, Paris, France ; Department of Anatomy, UPMC, 105 Boulevard de l'hôpital, 75013 Paris, France.

ABSTRACT
More total hip arthroplasty (THA) is performed worldwide and especially in younger and more active patients compared to earlier decades. One of the focuses of THA research in the future will be on optimizing the radiological follow-up of these patients using 2D and 3D measurements of implants position while reducing the radiation dose delivered. Low-dose EOS(®) imaging is an innovative slot-scanning radiograph system providing valuable information in patient functional positions (standing, sitting and even squatting positions). EOS has been proven accurate and reliable without significant inconvenience caused by the metallic artifacts of implants. The ability to obtain precise data on implant orientation according to the patient posture opens new perspectives for a comprehensive analysis of the pelvic frontal and sagittal balance and its potential impact on implants function and failures. We report our 8 years experience on our first 300 THA patients using this technology routinely for pre and post op evaluation. Our results will be compared and confronted with the actual literature about this innovative technology. We shall especially emphasize our experience about patients with abnormal posture and the evolution of the subject over time, because the phenomenon of an aging spine is frequently associated with the process of aging hips.

No MeSH data available.