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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.


EOS comparison before and after left THA revision: correction of the length of the left lower extremity; the left flexion hasdisappeared.
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Figure 17: EOS comparison before and after left THA revision: correction of the length of the left lower extremity; the left flexion hasdisappeared.

Mentions: Using EOS full-body images AP and lateral, we were able to analyze 98 cases of “oblique pelvis”, flexion contracture or hyperextension of lower limbs: comparison of standing and sitting AP views allows differentiation of oblique pelvis linked to lower limb discrepancy, as in the sitting position the frontal pelvic tilt disappears (41 cases) (Fig. 15). On the contrary fixed oblique pelvis are not influenced by the sitting position. We could test the impact of heel compensation to correct LLD in 12 cases (Fig. 16) as well as the consequences of THA revision (Fig. 17).


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)

EOS comparison before and after left THA revision: correction of the length of the left lower extremity; the left flexion hasdisappeared.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 17: EOS comparison before and after left THA revision: correction of the length of the left lower extremity; the left flexion hasdisappeared.
Mentions: Using EOS full-body images AP and lateral, we were able to analyze 98 cases of “oblique pelvis”, flexion contracture or hyperextension of lower limbs: comparison of standing and sitting AP views allows differentiation of oblique pelvis linked to lower limb discrepancy, as in the sitting position the frontal pelvic tilt disappears (41 cases) (Fig. 15). On the contrary fixed oblique pelvis are not influenced by the sitting position. We could test the impact of heel compensation to correct LLD in 12 cases (Fig. 16) as well as the consequences of THA revision (Fig. 17).

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.