Clinical Investigation of "Femur First Workflow" for computer-assisted navigation in total hip arthroplasty

Conditions

M16.1 M16.3 M16.5 M16.7 M16.9

Arnab Palit, Mark A. Williams, Vineet Seemala, Mike Donnelly, Tobias Renkawitz et al. (6 authors)

Journal of Orthopaedic Research®2025-04-121 citations

The final implant position of a commonly used collarless straight tapered stem design (Corail<sup>®</sup>) does not correlate with femoral neck resection height in cement-free total hip arthroplasty: a retrospective computed tomography analysis.

Worlicek M, Weber M, Wörner M, Schwarz T, Zeman F, Grifka J, Renkawitz T, Craiovan B.

2018-11-136 citations

10.1186/s10195-018-0513-z

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

Markus Weber, Max Thieme, Moritz Kaiser, Florian Völlner, Michael Worlicek et al. (8 authors)

BioMed Research International2018-06-259 citations

10.1155/2018/1639840

Native femoral anteversion should not be used as reference in cementless total hip arthroplasty with a straight, tapered stem: a retrospective clinical study.

Worlicek M, Weber M, Craiovan B, Wörner M, Völlner F, Springorum HR, Grifka J, Renkawitz T.

2016-09-2019 citations

10.1186/s12891-016-1255-9

Leg length and offset differences above 5mm after total hip arthroplasty are associated with altered gait kinematics.

Renkawitz T, Weber T, Dullien S, Woerner M, Dendorfer S, Grifka J, Weber M.

2016-07-09115 citations

10.1016/j.gaitpost.2016.07.011

Visual intraoperative estimation of range of motion is misleading in minimally invasive total hip arthroplasty.

Woerner M, Weber M, Sendtner E, Springorum R, Worlicek M, Craiovan B, Grifka J, Renkawitz T.

2016-05-283 citations

10.1007/s00402-016-2478-9

Minimally invasive computer-navigated total hip arthroplasty, following the concept of femur first and combined anteversion: design of a blinded randomized controlled trial.

Renkawitz T, Haimerl M, Dohmen L, Gneiting S, Wegner M, Ehret N, Buchele C, Schubert M, Lechler P, Woerner M, Sendtner E, Schuster T, Ulm K, Springorum R, Grifka J.

2011-08-1941 citations

10.1186/1471-2474-12-192

Interventions

Group 1: Navigation assisted placement of primary Hip Total Endoprosthesis Group 2: Conventional placement of primary Hip Total Endoprosthesis

Eligibility

Sex/Gender

All

Age

50 Years to 75 Years

Inclusion criteria

Inclusion criteria: • Indication for total hip arthroplasty due to coxarthrosis • Physical condition to receive total hip arthroplasty; • Patient consent to study procedures (incl. post-operative CT)

Exclusion criteria

Exclusion criteria: • Patient age 75; • Hip implant present on the contralateral side; • Termination of navigated procedure due to technical difficulties

Design outcomes

Primary

Measure	Time frame
Approx. 6-8 weeks postoperatively, a pelvic/femoral CT scan will be perfomed. Then, the postoperative range-of-motion/ROM of the treated hip joint until bony or metal impingement will be determined. For this purpose, the bone structures will be segmented in the post-operative CT data set. Based on the segmented bone models, the postoperative ROM will be calculated by an algorithm which automatically determines bony and prosthetic impingements.	—

Measure

Time frame

Approx. 6-8 weeks postoperatively, a pelvic/femoral CT scan will be perfomed. Then, the postoperative range-of-motion/ROM of the treated hip joint until bony or metal impingement will be determined. For this purpose, the bone structures will be segmented in the post-operative CT data set. Based on the segmented bone models, the postoperative ROM will be calculated by an algorithm which automatically determines bony and prosthetic impingements.

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Secondary

Measure	Time frame
Based on a postoperative CT scan of the hip and femur, additional evaluation will be performed. The variability of the cup position using conventional or computer-assisted implantation will be analyzed by measuring the cup position in the post-operative CT data sets. The accuracy of the image-free navigation procedure for cup and shaft placement will be assessed by comparing the intraoperatively acquired implant positions with measurements in the postoperative CT data. A pre- and post-operative clinical examination including various scores for total hip arthroplasty (Harris Hip Score, HOOS etc.), life quality (SF 36, EuroQol), and pain (visual analog scale 1-10) will be used. A pre- and post-operative (6 months-1 year)gait analysis using a gait laboratory and a musculoskeletal model will be performed for a subset of patients (40-60). Hip reaction forces, hip angle variation, implant-bone contact stress and muscle forces/activation will be evaluated with the help of the AnyBody Managed Model Repository (AMMR 2009). In order to apply motion to the model marker position trajectories of gait laboratory experiments are used.	—

Measure

Time frame

Based on a postoperative CT scan of the hip and femur, additional evaluation will be performed. The variability of the cup position using conventional or computer-assisted implantation will be analyzed by measuring the cup position in the post-operative CT data sets. The accuracy of the image-free navigation procedure for cup and shaft placement will be assessed by comparing the intraoperatively acquired implant positions with measurements in the postoperative CT data. A pre- and post-operative clinical examination including various scores for total hip arthroplasty (Harris Hip Score, HOOS etc.), life quality (SF 36, EuroQol), and pain (visual analog scale 1-10) will be used. A pre- and post-operative (6 months-1 year)gait analysis using a gait laboratory and a musculoskeletal model will be performed for a subset of patients (40-60). Hip reaction forces, hip angle variation, implant-bone contact stress and muscle forces/activation will be evaluated with the help of the AnyBody Managed Model Repository (AMMR 2009). In order to apply motion to the model marker position trajectories of gait laboratory experiments are used.

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Countries

Germany

Contacts

Public ContactTobias Renkawitz

Orthopädische Klinik für die Universität Regensburg, Asklepios Klinikum Bad Abbach

t.renkawitz@asklepios.com09405 180

Outcome results

None listed