Leg Length and Offset Measures with a Pinless Femoral Reference Array during THA

Renkawitz, Tobias; Schuster, Tibor; Grifka, Joachim; Kalteis, T.; Sendtner, Ernst

doi:10.1007/s11999-009-1086-1

Cited by 25 publications

(24 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As for the effect of this difference in the reference on anteversion measurement, Turley et al assessed the validity of the measurement principle employed in the navigation system and concluded that the navigation results can be reasonably compared to the values measured on CT images [ 15 ]. There have been several studies examining leg length change after THA with image-free navigation [ 16 - 18 , 19 ]. Previous study examined the accuracy of leg length adjustment in THA using a previous version of image-free navigation in which the leg length was intraoperatively measured without a femoral clamp attached to the femur.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of Component Orientation and Leg Length Adjustment in Total Hip Arthroplasty Using Image-free Navigation

Takeda

Fukunishi

Nishio

et al. 2017

TOORTHJ

View full text Add to dashboard Cite

Purpose:The purpose of this study was to examine the accuracy of implant orientation and leg length in total hip arthroplasty (THA) with an image-free navigation system based on a comparison of the intraoperative navigation and postoperative CT evaluations.Material and Methods:A consecutive series of 111 patients (118 hips) who underwent THA using the current version of the image-free navigation system constituted the basic study population. Subsequently, a total of 101 patients (108 hips) meeting the inclusion and exclusion criteria were selected as study subjects for the analysis. THA was performed using an image-free navigation system that was capable of adjusting both the prosthetic position and leg length. Postoperative CT examination was performed for all study subjects, and the prosthetic position and leg length were measured on CT images using the image analysis software. Subsequently, the intraoperative navigation results and the corresponding values obtained from the postoperative CT measurements were compared to test the accuracy of the navigation system.Results:The average discrepancies between the intra- and postoperative assessments were 6.8°, 3.7°, and 5.7° for cup anteversion, cup inclination, and stem anteversion, respectively. The corresponding value in leg length averaged 4.1 mm.Conclusion:Average discrepancies between the intra- and postoperative measurements were less than 10° in all prosthetic alignment parameters and less than 5 mm in leg length. Intraoperative assessments with the use of the image-free navigation in THA could afford satisfactory result.

show abstract

Section: Discussionmentioning

confidence: 99%

Accuracy of Component Orientation and Leg Length Adjustment in Total Hip Arthroplasty Using Image-free Navigation

Takeda

Fukunishi

Nishio

et al. 2017

TOORTHJ

View full text Add to dashboard Cite

show abstract

“…The surgeon may control the limb length and achieve an accurate restoration of leg length and joint offset [20, 31–33]. …”

Section: Navigation For Orthopedic Surgerymentioning

confidence: 99%

Navigation in surgery

Mezger

Jendrewski

Bartels

2013

Langenbecks Arch Surg

258

132

View full text Add to dashboard Cite

Introduction“Navigation in surgery” spans a broad area, which, depending on the clinical challenge, can have different meanings. Over the past decade, navigation in surgery has evolved beyond imaging modalities and bulky systems into the rich networking of the cloud or devices that are pocket-sized.DiscussionThis article will review various aspects of navigation in the operating room and beyond. This includes a short history of navigation, the evolution of surgical navigation, as well as technical aspects and clinical benefits with examples from neurosurgery, spinal surgery, and orthopedics.ConclusionWith improved computer technology and a trend towards advanced information processing within hospitals, navigation is quickly becoming an integral part in the surgical routine of clinicians.

show abstract

“…This technique also harbours the possibility of controlling leg length and offset changes during THA [ 14 ]. To reduce the risk of pin infection and fractures due to the bony fixation of reference markers [ 15 ], novel pinless navigation devices have been developed for achieving appropriate LL and OS values [ 16 ]. However, direct translatory and rotational variations between the pinless array and the femoral bone up to 8 mm in translation and 9° in rotation are associated with the risk of potential error during measurements [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Leg Length and Offset Restoration in Femoral Pinless Navigation Compared to Navigation Using a Fixed Pin during Total Hip Arthroplasty

Weber¹,

Thieme²,

Kaiser³

et al. 2018

BioMed Research International

Self Cite

View full text Add to dashboard Cite

Equalization of biomechanical differences is a major goal in total hip arthroplasty (THA). In the current study we compared the accuracy of restoring leg length and offset using imageless navigation with an osseous fixed pin to a femoral pinless device in 97 minimally invasive THAs through an anterolateral approach in the lateral decubitus position. Leg length and offset differences were evaluated on magnification-corrected radiographs by a blinded observer. A postoperative mean difference of -0.9 mm (95% CI -2.8 mm to 1.1 mm, p = 0.38) between pinless navigation and navigation with a fixed pin was observed for leg length and that of -2.4 mm (95% CI -3.9 mm to -0.9 mm, p = 0.002) was observed for offset, respectively. The number of patients with a residual difference below 5 mm after THA was higher if using a fixed pin than in pinless navigation for both leg length (98.2%, 54/55 to 50.0%, 21/42, p < 0.001) and offset (100.0%, 55/55 to 71.4%, 30/42, p < 0.001). Imageless navigation is a feasible method in intraoperative control of leg length and offset in minimally invasive THA. The use of pins fixed to the bone has a higher precision than pinless devices. This trial is registered with DRKS00000739.

show abstract

Leg Length and Offset Measures with a Pinless Femoral Reference Array during THA

Cited by 25 publications

References 28 publications

Accuracy of Component Orientation and Leg Length Adjustment in Total Hip Arthroplasty Using Image-free Navigation

Accuracy of Component Orientation and Leg Length Adjustment in Total Hip Arthroplasty Using Image-free Navigation

Navigation in surgery

Accuracy of Leg Length and Offset Restoration in Femoral Pinless Navigation Compared to Navigation Using a Fixed Pin during Total Hip Arthroplasty

Contact Info

Product

Resources

About