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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.


Abnormal SAA value: the cup is too vertical (SAA is 111°).
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Figure 8: Abnormal SAA value: the cup is too vertical (SAA is 111°).

Mentions: The coherence between sagittal acetabular tilt and SS is expressed by the sacro-acetabular angle (SAA), defined as the tangent of the sacral endplate and the axis of the acetabular ellipse on lateral view (the latter defining the angle of sagittal acetabular inclination to the horizontal). The SAA is fixed and empirically applied by the surgeon to the acetabular component in THA [6,20] (Fig. 7). Geometrically, SAA = SS +ASI. Our results demonstrate a wide variation of this anatomical parameter (mean 69°, range 31° to 129°). In this series, the consequences of poor adjustments in outlier cases induced atypical positioning of the cup and impingement situations in standing (12 cases) (Fig. 8) or sitting positions (14 cases) (Fig. 9).


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)

Abnormal SAA value: the cup is too vertical (SAA is 111°).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 8: Abnormal SAA value: the cup is too vertical (SAA is 111°).
Mentions: The coherence between sagittal acetabular tilt and SS is expressed by the sacro-acetabular angle (SAA), defined as the tangent of the sacral endplate and the axis of the acetabular ellipse on lateral view (the latter defining the angle of sagittal acetabular inclination to the horizontal). The SAA is fixed and empirically applied by the surgeon to the acetabular component in THA [6,20] (Fig. 7). Geometrically, SAA = SS +ASI. Our results demonstrate a wide variation of this anatomical parameter (mean 69°, range 31° to 129°). In this series, the consequences of poor adjustments in outlier cases induced atypical positioning of the cup and impingement situations in standing (12 cases) (Fig. 8) or sitting positions (14 cases) (Fig. 9).

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.