A kinematic model for calculating cup alignment error during total hip arthroplasty

Wolf, Alon; DiGioia, Anthony M.; Mor, Andrew B.; Jaramaz, Branislav

doi:10.1016/j.jbiomech.2004.09.033

Cited by 30 publications

(23 citation statements)

References 19 publications

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“…It has been shown that the intrinsic error of the navigation system is very low; however, the clinical reliability of the system is directly related to the reliability of the information fed into the computer [13,14]. In fact, we observed discrepancies between the perioperative surgeon concerning the cup position and the values given by the computer.…”

Section: Technological Limitsmentioning

confidence: 81%

“…13). According to the Wolf model [13,14], an error of 5 during the APP acquisition may lead to an error of 5 for the anteversion angle (Fig. 14).…”

Section: Technological Limitsmentioning

confidence: 99%

“…The results of this study have shown differences greater than 5 for more than 25% of the patients between the pre-operative evaluation and the postoperative one at 2 months, and for half of the patients between the pre-operative evaluation and the post-operative one at 1 year. According to the Wolf model [13,14], consequences for the final cup position may be very important (Fig. 17).…”

Section: Theoretical Limitationsmentioning

confidence: 99%

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Computer-assisted cup positioning in total hip arthroplasty: usefulness, limits and future

2008

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The basic hypothesis for computer-assisted placement of the cup in total hip arthroplasty (THA) is that navigation will improve cup positioning around the targeted values previously defined in the literature as the gold standard for cup placement and reduce the number of outliers. Reducing the outliers will theoretically reduce the number of dislocation, improve range of motion and reduce wear. We will present the surgical technique, and the results of a prospective randomized study comparing computer-assisted cup positioning with free-hand placement. Furthermore we will outline some limitations of the navigation systems in hip surgery observed during our early experience through the results of complementary anatomical and clinical studies. Finally we will discuss the potential for future development of computerassisted THA.

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Section: Technological Limitsmentioning

confidence: 81%

“…13). According to the Wolf model [13,14], an error of 5 during the APP acquisition may lead to an error of 5 for the anteversion angle (Fig. 14).…”

Section: Technological Limitsmentioning

confidence: 99%

Section: Theoretical Limitationsmentioning

confidence: 99%

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Computer-assisted cup positioning in total hip arthroplasty: usefulness, limits and future

2008

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“…The bilateral ASIS and the midpoint between the two pubercles [20]- [21], this land mark identification step is normally done using a tracked pointer. However even a minor failure in correct landmark identification could lead to an increased error of cup orientation measurement [22].…”

Section: Introductionmentioning

confidence: 99%

An Automated Pelvic Bone Geometrical Feature Measurement Utilities on Ct Scanning

D.C¹

2013

IOSR-JCE

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“…Nevertheless, problems may still occur, such as instability, dislocation, impingement, excessive wear or aseptic loosening. Acetabular component malalignment is a key factor explaining such complications [1][2][3][4][5][6][7][8][9]. Concerning dislocations, for example, which range between 2% and 11% [8,[10][11][12], Lewinneck et al [1] proposed a safe zone for cup orientation to prevent risk of dislocation, which was 40°±10°in abduction and 15°±10°in anteversion.…”

Section: Introductionmentioning

confidence: 99%

Intra- and extra-articular planes of reference for use in total hip arthroplasty: a preliminary study

Hausselle

Moreau²,

Wessely³

et al. 2012

International Orthopaedics (SICOT)

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Purpose Acetabular component malalignment in total hip arthroplasty can lead to potential complications such as dislocation, component impingement and excessive wear. Computer-assisted orthopaedic surgery systems generally use the anterior pelvic plane (APP). Our aim was to investigate the reliability of anatomical landmarks accessible during surgery and to define new potential planes of reference. Methods Three types of palpations were performed: virtual, on dry bones and on two cadaveric specimens. Four landmarks were selected, the reproducibility of their positioning ranging from 0.9 to 2.3 mm. We then defined five planes and tested them during palpations on two cadaveric specimens. Results Two planes produced a mean orientation error of 5.0°[standard deviation (SD 3.3°)] and 5.6°(SD 2.7°). Conclusions Even if further studies are needed to test the reliability of such planes on a larger scale in vivo during surgery, these results demonstrated the feasibility of defining a new plane of reference as an alternative to the APP.

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A kinematic model for calculating cup alignment error during total hip arthroplasty

Cited by 30 publications

References 19 publications

Computer-assisted cup positioning in total hip arthroplasty: usefulness, limits and future

Computer-assisted cup positioning in total hip arthroplasty: usefulness, limits and future

An Automated Pelvic Bone Geometrical Feature Measurement Utilities on Ct Scanning

Intra- and extra-articular planes of reference for use in total hip arthroplasty: a preliminary study

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