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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.


The APP or Lewinnek plane inclination in the standing (APPI-ST) and sitting (APPI-SIT) positions is defined as the anglesubtended by a vertical reference line and a line tangent to the antero-superior iliac spines and the pubic symphysis. The variation of APP canbe very significant from standing to sitting.
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Figure 5: The APP or Lewinnek plane inclination in the standing (APPI-ST) and sitting (APPI-SIT) positions is defined as the anglesubtended by a vertical reference line and a line tangent to the antero-superior iliac spines and the pubic symphysis. The variation of APP canbe very significant from standing to sitting.

Mentions: The variation in SS angle determines the range of PT, and this variation influences the orientation of the APP or the Lewinnek plane classically used as a reference for adjusting the position of the acetabular cup and for the postoperative evaluation of its orientation. (Fig. 5). The angular variations of the Lewinnek plane inclination between standing (APPI-ST) and sitting (APPI-SIT) are about 22°.


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)

The APP or Lewinnek plane inclination in the standing (APPI-ST) and sitting (APPI-SIT) positions is defined as the anglesubtended by a vertical reference line and a line tangent to the antero-superior iliac spines and the pubic symphysis. The variation of APP canbe very significant from standing to sitting.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 5: The APP or Lewinnek plane inclination in the standing (APPI-ST) and sitting (APPI-SIT) positions is defined as the anglesubtended by a vertical reference line and a line tangent to the antero-superior iliac spines and the pubic symphysis. The variation of APP canbe very significant from standing to sitting.
Mentions: The variation in SS angle determines the range of PT, and this variation influences the orientation of the APP or the Lewinnek plane classically used as a reference for adjusting the position of the acetabular cup and for the postoperative evaluation of its orientation. (Fig. 5). The angular variations of the Lewinnek plane inclination between standing (APPI-ST) and sitting (APPI-SIT) are about 22°.

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.