Evaluation of formal methods in hip joint center assessment: An in vitro analysis

Lopomo, N.; Sun, Lei; Zaffagnini, Stefano; Giordano, Giovanni; Safran, Marc R.

doi:10.1016/j.clinbiomech.2009.11.008

Cited by 44 publications

(43 citation statements)

References 34 publications

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“…Our goal was to check this sensitivity during 3D computer-based simulations. Therefore, our estimations were done using 3D meshes reconstructed from MRI rather than using physical models or cadaver [21]. Two different kinds of penetration depths were considered (radial and angular) and the investigations were done for 10 different patients and for 6 types of clinical movements.…”

Section: Discussionmentioning

confidence: 99%

“…Adduction, Abduction, Internal Rotation, External Rotation, Flexion and Extension) and estimate changes in the penetration depth among hip tissues (including bone, cartilage and labrum), during the movement. Since our goal is to check the HJC sensitivity during 3D computer-based simulations, our estimations are done using 3D meshes reconstructed from MRI rather than using physical models or cadaver [21].…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity of hip tissues contact evaluation to the methods used for estimating the hip joint center of rotation

Arbabi

Schmid

Boulic

et al. 2012

Med Biol Eng Comput

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Computer-based simulations of human hip joints generally include investigating contacts happening among soft or hard tissues during hip movement. In many cases, hip movement is approximated as rotation about an estimated hip center. In this paper, we investigate the effect of different methods used for estimating hip joint center of rotation on the results acquired from hip simulation. For this reason, we use three dimensional models of hip tissues reconstructed from MRI datasets of 10 subjects, and estimate their center of rotation by applying five different methods (including both predictive and functional approaches). Then, we calculate the amount of angular and radial penetrations that happen among three dimensional meshes of cartilages, labrum, and femur bone, when hip is rotating about different estimated centers of rotation. The results indicate that hip simulation can be highly affected by the method used for estimating hip center of rotation. However, under some conditions (e.g. when Adduction or External Rotation are considered) we can expect to have a more robust simulation. In addition, it was observed that applying some methods (e.g. the predictive approach based on acetabulum) may result in less robust simulation, comparing to the other methods.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sensitivity of hip tissues contact evaluation to the methods used for estimating the hip joint center of rotation

Arbabi

Schmid

Boulic

et al. 2012

Med Biol Eng Comput

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“…Leitner"s method suggests that if an infra-red locater is put on the distal femur (the end close to tibia), then rotate the femur, we can use the locator to track the movement [4], [6]. If 4 non-coplanar points can be tracked, then the center of this sphere can be calculated using the following formula: Fig.…”

Section: A Spherical Surface Fittingmentioning

confidence: 99%

A Computer-Assisted Non-Image-Based Method for Locating the Center of Femoral Head

Wu¹,

Li²

2013

IJBBB

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Abstract-In total knee replacement (TKR) operation, a key factor for successful operation is to locate the center of the femoral head accurately, and to determine the mechanical axis, which goes through the center of femoral head and knee joint. Place an infrared tracker on the distal end of the femur, rotate the bone and then track the movement with the tracker, thus the center of the femoral head can be determined. We use the Hough transform in this study to convert the least square calculation into a dualistic linear regression, therefore the algorithm is optimized and the computing time is reduced. We also use RANdom SAmple Consensus (RANSAC) algorithm for data screening, which has enhanced the method's resistance to interference during the surgery. Combining the two advantages, this method can reach low deviation within 2mm, fast computing time less than 0.5s, despite of interferences.Index Terms-Locating femoral center, infrared locator, hough transform, RANSAC.

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“…It is essential that these reference markers remain stable during the surgery, since even a small loss of position will compromise all other data points. The center of rotation of the hip joint is usually calculated digitally by extrapolation from a series of movements of the femur performed by the surgeon [13]. A pointer with an attached reference array is then used to mark out other anatomical landmarks, such as the ankle and knee joint surface.…”

Section: Navigation In Generalmentioning

confidence: 99%

Applications of computer navigation in sports medicine knee surgery: an evidence-based review

Young

Safran

Clatworthy³

2013

Curr Rev Musculoskelet Med

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Computer-assisted surgery (CAS) has been investigated in a number of sports medicine procedures in the knee. Current barriers to its widespread introduction include increased costs, duration, and invasiveness of surgery. Randomized trials on the use of CAS in anterior cruciate ligament reconstruction have failed to demonstrate a clinical benefit. Data on CAS use in high tibial osteotomy are more promising; however, long-term studies are lacking. CAS has a number of research applications in knee ligament surgery, and studies continue to explore its use in the treatment of osteochondral lesions. This article reviews the applications of CAS in sports medicine knee surgery and summarizes current literature on clinical outcomes.

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Evaluation of formal methods in hip joint center assessment: An in vitro analysis

Cited by 44 publications

References 34 publications

Sensitivity of hip tissues contact evaluation to the methods used for estimating the hip joint center of rotation

Sensitivity of hip tissues contact evaluation to the methods used for estimating the hip joint center of rotation

A Computer-Assisted Non-Image-Based Method for Locating the Center of Femoral Head

Applications of computer navigation in sports medicine knee surgery: an evidence-based review

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