Ultrasound-based computer navigation of the acetabular component: a feasibility study

Wassilew, Georgi I.; Heller, Markus O.; Hasart, Olaf; Perka, Carsten; Südhoff, I.; Janz, Viktor; Duda, Georg N.; König, Christian

doi:10.1007/s00402-011-1412-4

Cited by 9 publications

(2 citation statements)

References 31 publications

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“…Based on postoperative CT data, the individual cup orientation could be identified for each patient and was reported relative to the anterior pelvic plane using anatomical landmarks 52 . The stem orientation was determined relative to the axis parallel to the posterior condyle axis 53 .…”

Section: Methodsmentioning

confidence: 99%

Surgical cup placement affects the heating up of total joint hip replacements

Damm

Bender

Waldheim

et al. 2021

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The long-term success of highly effective total hip arthroplasty (THA) is mainly restricted by aseptic loosening, which is widely associated with friction between the head and cup liner. However, knowledge of the in vivo joint friction and resulting temperature increase is limited. Employing a novel combination of in vivo and in silico technologies, we analyzed the hypothesis that the intraoperatively defined implant orientation defines the individual joint roofing, friction and its associated temperature increase. A total of 38,000 in vivo activity trials from a special group of 10 subjects with instrumented THA implants with an identical material combination were analyzed and showed a significant link between implant orientation, joint kinematics, joint roofing and friction-induced temperature increase but surprisingly not with acting joint contact force magnitude. This combined in vivo and in silico analysis revealed that cup placement in relation to the stem is key to the in vivo joint friction and heating-up of THA. Thus, intraoperative placement, and not only articulating materials, should be the focus of further improvements, especially for young and more active patients.

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Section: Methodsmentioning

confidence: 99%

Surgical cup placement affects the heating up of total joint hip replacements

Damm

Bender

Waldheim

et al. 2021

Sci Rep

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“…27 This exact registration causes only a minor error in the acetabular cup position as shown by the navigation system and in the actual post-operative result. In this case, less experience on the part of the surgeon and a higher BMI in the cadaver do not result in a clinically relevant error.…”

Section: Component Positioningmentioning

confidence: 99%

What do we get from navigation in primary THA?

et al. 2016

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Navigation in primary total hip arthroplasty has a history of over 20 years. During this process, imageless computer navigation can be particularly helpful in optimally restoring the hip’s biomechanics. This involves the accurate placement of the acetabular component with the determination of the anteversion and abduction, whereby the navigated femur-first technique also allows for a calculation of the combined anteversion. Additional critical parameters such as the reconstruction of the rotation centre, as well as the femoral and acetabular offset, can also be optimally adjusted. Last but not least, an intra-operative evaluation and equalisation of the leg length is possible.Nonetheless, the disadvantages of this surgical technique in terms of the high costs in the acquisition and preservation of the necessary devices, as well as the longer operation time, must be taken into account. However, economic aspects are not the only thing preventing widespread use of the navigation technique. Determining the plane of reference (APP) for the optimal orientation of the implants is based on palpation of the bony landmarks – and this is influenced by the thickness of the soft tissue layer. Furthermore, the experience of the surgeon constitutes a variable that influences the accuracy of navigation.In summary, hip navigation certainly offers an interesting technique for the optimisation of total hip arthroplasty with reconstruction of proper biomechanics. At the same time, there is currently a lack of high-quality randomised controlled long-term trials that evaluate the clinical advantage for the patients, together with cost utility and survival rates.Cite this article: Renner L, Janz V, Perka C, Wassilew GI. What do we get from navigation in primary THA? EFORT Open Rev 2016;1:205-210. 10.1302/2058-5241.1.000034.

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State of the Art of Ultrasound-Based Registration in Computer Assisted Orthopedic Interventions

Schumann

2015

Computational Radiology for Orthopaedic Interventions

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Ultrasound-based computer navigation of the acetabular component: a feasibility study

Abstract: Our preliminary results confirm that ultrasound navigation is a highly accurate tool that allows a reproducible registration of the APP and thereby enables accurate and precise intraoperative determination of the acetabular cup orientation also in patients with increased BMI.

Cited by 9 publications

References 31 publications

Surgical cup placement affects the heating up of total joint hip replacements

Surgical cup placement affects the heating up of total joint hip replacements

What do we get from navigation in primary THA?

State of the Art of Ultrasound-Based Registration in Computer Assisted Orthopedic Interventions

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