Summary: Tibial polyethylene insert thickness, as a surrogate of surgical accuracy, is more reproducible in robotic-assisted than in navigation-assisted or manual-instrumentation TKA. The learning curve to reach high levels of reproducibility with this technique is relatively short.

Background

Increased accuracy and lower rates of component positioning outliers have been associated with better long-term survival and functional outcomes of total knee arthroplasty (TKA). This study investigates the accuracy of robotic-assisted TKA compared to navigation-assisted and manual instrumentation techniques, using polyethylene tibial insert thickness as a surrogate.

Methods

Consecutive primary TKA by a single surgeon were retrospectively reviewed and divided in 3 groups: manual instrumentation (M-TKA), navigation-assisted (NA-TKA) and robotic-assisted (RA-TKA). Polyethylene insert thickness, deviation from planned thickness and rate of outliers were compared between the 3 groups using non-parametric ANOVA, Kruskal-Wallis tests, and Bonferroni corrections. Logistic regression analysis was performed to identify predictors of polyethylene thickness ≥9 mm. The learning curve for RA-TKA was evaluated with a box plot graph of groups of 10 consecutive cases.

Results

There were 474 patients in M-TKA, 257 in NA-TKA and 225 in RA-TKA, with median polyethylene thicknesses of 6.0 (IQR5.0–7.0), 6.0 (IQR 5.0–7.0) and 5.0 (IQR 5.0–6.0) millimeters respectively (p˂0.001 RA-TKA compared to both other groups). Polyethylene inserts with a thickness ≥9mm were used in 28(5.9%) M-TKA, 13(5.1%) NA-TKA and 1(0.4%) RA-TKA (p=0.004). Independent predictors for polyethylene thickness ≥9mm included surgical technique, left side and male sex. A learning curve of <30 cases was observed before consistent polyethylene thickness was achieved in RA-TKA.

Conclusion

Tibial polyethylene insert thickness, as a surrogate of surgical accuracy, is more reproducible in robotic-assisted than in navigation-assisted or manual-instrumentation TKA. The learning curve to reach high levels of reproducibility with this technique is relatively short.

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An Inlay Patellofemoral Arthroplasty With An Enlarged Trochlear Component Design Results In Better Patient Reported Outcomes Measures And Lower Failure Rates Compared To A Traditional Design: A Two-Year Follow Up Study ePoster Presentation Armin Runer, PD MD, GERMANY Jonas Pogorzelski, MD, PhD, MHBA, GERMANY Hugo Bothorel, MEng, SWITZERLAND Philippe Matthias Tscholl, MD, SWITZERLAND Matthias Cotic, MSc, GERMANY Sebastian Siebenlist, MD, MHBA, Prof., GERMANY Andreas B. Imhoff, MD, Prof. Emeritus, GERMANY
Clinical and Radiological Comparison of Unicompartmental vs Patellofemoral vs Total Knee Arthroplasty ePoster Presentation Kewin Sony, MBBS, MRes, UNITED KINGDOM Oday Al-Dadah, MBChB, MD, FRCS (Tr & Orth), UNITED KINGDOM
Investigating Patient And Surgical Factors Affecting Same Day Discharge After Unicompartmental Knee Replacement ePoster Presentation Suleyman Ulla, MBChB, UNITED KINGDOM Patrick Richard Michael Nicholas, MBChB, MRCS(Glasg), UNITED KINGDOM Stuart Wilson Bell, MBChB MRCP FRCS (Orth), UNITED KINGDOM
Evaluating Tibial Component Rotational Alignment After Total Knee Arthroplasty Using Augmented Reality Navigation System With Smart Glasses ePoster Presentation Takayuki Koya, MD, PhD, JAPAN Atsushi Sato, MD, PhD, JAPAN Masataka Ota, MD, JAPAN Misako Takizawa, MD, JAPAN Reo Nagasaka, JAPAN Marika Mukunoki, MD, JAPAN Kanako Izukashi, MD, JAPAN Jun Oike, MD, PhD, JAPAN Takayuki Okumo, MD, PhD, JAPAN Saki Yagura, MD, JAPAN Koji Kanzaki, Prof., JAPAN
Mid-Term Outcomes Of Lateral Fixed-Bearing Unicompartmental Knee Arthroplasty ePoster Presentation Sumin Lim, MD, PhD, KOREA, REPUBLIC OF Jun-Young Chung, MD, KOREA, REPUBLIC OF Tae Hun Kim, MD, KOREA, REPUBLIC OF Myung-Sub Lee, MD, KOREA, REPUBLIC OF Jeong-Hyun Koh, MD, KOREA, REPUBLIC OF Jung Sunwoo, MD, KOREA, REPUBLIC OF
Novel Algorithm for Gap Balancing and Bone Cuts in Robotic Total Knee Replacements Significantly Improves Accuracy and Surgical Duration ePoster Presentation Glen Liau , MBBS, MRCS, MMed, FRCS, FAMS, MBA, SINGAPORE Matthew Song Peng Ng, MBBS candidate, SINGAPORE Ryan Wai Keong Loke, MBBS candidate, SINGAPORE
Knee Joint Synovitis After Total Knee Arthroplasty is Not Correlated to Patient Satisfaction Score ePoster Presentation Kristen I Barton, MD, PhD, UNITED STATES Alexandra Rocha, MD, CANADA Robert Dima, PhD, CANADA Kevin R Boldt, PhD, CANADA Holly Philpott, PhD, CANADA Lyndsay Somerville, PhD, CANADA C. Thomas Appleton, MD, PhD, CANADA Brent Lanting, MD, FRCSC, CANADA
Does Robotic Assistance In Total Knee Arthroplasty Improve Preoperative Planning And Intraoperative Decision-Making? ePoster Presentation David H. Figueroa, MD, CHILE Waldo Gonzalez Duque, MD, CHILE Rafael Calvo, MD, CHILE Francisco Figueroa, MD, CHILE
Experience in Correcting Varus and Valgus Deformities in Total Knee Arthroplasty Using Robotic Assistance ePoster Presentation Hector Zamorano, MD, CHILE Roberto Yañez, MD,phD,prof, CHILE Sebastian Valdes, student, CHILE Gaston Caracciolo, CHILE Cristobal Yañez, MD, CHILE Sebastian Yanez, MD, CHILE Leonardo Javier Carabajal Vera, MD, ARGENTINA Lars Raymond Strömback, MD, CHILE Magaly Iñiguez, MD, CHILE
Clinical Outcomes Of Functional Versus Mechanical Alignment In Robotic-Arm Assisted Total Knee Arthroplasty: A Randomised Controlled Trial ePoster Presentation Simon W. Young, MD, FRACS, NEW ZEALAND Mei Lin Tay, PhD, NEW ZEALAND Kohei Kawaguchi, MD, PhD, JAPAN Bill Farrington, FRCS, NEW ZEALAND Rupert S Van Rooyen, MBChB, FRACS, NEW ZEALAND Matthew Walker, MBChB, FRACS, NEW ZEALAND Ali Bayan, MBChB, FRACS, NEW ZEALAND
Longer Hospital Length of Stay After Total Knee Arthroplasty is an Independent Risk Factor for Increased Complication Rates ePoster Presentation Logan Finger, MD, UNITED STATES Kelly A Murphy, BS, UNITED STATES Kenneth Urish, MD, PhD Michael O'Malley, MD, UNITED STATES Brian Klatt, MD, UNITED STATES Johannes F. Plate, MD, PhD, UNITED STATES
Double-blinded Prospective Randomized Clinical Trial in Total Knee Arthroplasty: Impact of Tourniquet Inflation Timing on Postoperative Pain, Joint Function, and Quality of Life ePoster Presentation Po-Yao Wang, MD, TAIWAN Ting-Chun Lin, TAIWAN Chia-Hui Wang, PhD, TAIWAN Jia-Lin Wu, MD, MS, TAIWAN
Visible fluid motion on manipulation as the new threshold for intraoperatively-determined knee arthroplasty component loosening – a Delphi study ePoster Presentation George Samuel Buijs, MD, NETHERLANDS Arthur Johan Kievit, MD, NETHERLANDS Alex Bastiaan Walinga, MD, NETHERLANDS Matthias U. Schafroth, MD, NETHERLANDS Michael T. Hirschmann, MD, Prof., SWITZERLAND Leendert Blankevoort, PhD, NETHERLANDS
Integrating Elongation Patterns with AR-Based Navigation in Kinematic Alignment TKA. ePoster Presentation Atsushi Sato, MD, PhD, JAPAN Marika Mukunoki, MD, JAPAN Masataka Ota, MD, JAPAN Misako Takizawa, MD, JAPAN Kanako Izukashi, MD, JAPAN Jun Oike, MD, PhD, JAPAN Takayuki Okumo, MD, PhD, JAPAN Takayuki Koya, MD, PhD, JAPAN Koji Kanzaki, Prof., JAPAN
Comparison Between Restricted Inverse Kinematic Alignment And Restricted Kinematic Alignment In Achieving And Reproducing Soft Tissue Balance In Total Knee Arthroplasty ePoster Presentation Timothy S. Whitehead, MBBS, FRACS, AUSTRALIA Alexander Orsi, PhD, UNITED STATES Christopher Plaskos, PhD, UNITED STATES
The Use Of Imageless Robotic Assistance Does Not Reduce Early Postoperative Pain In Total Knee Replacement Compared To Conventional Arthroplasty ePoster Presentation Rodrigo Olivieri, MD, CHILE Sebastian Bianchi, MD, CHILE Cristóbal Díaz, MD, CHILE Pablo Albornoz, MD, CHILE Victor Barrientos, PhD, CHILE Jaime Ignacio Ugarte Checura, MD, CHILE Carolina Cardemil, MD, CHILE Pilar Buendia, BSN, CHILE Nicolas Franulic, MD, CHILE Jose Ignacio Laso, Md, CHILE Nicolas Gaggero, MD, CHILE
Differences In Coronal Plane Alignment Of The Knee (CPAK) Measured On Long-Leg Radiographs Compared To Computed Tomography For The Patients Undergoing Total Knee Arthroplasty ePoster Presentation Kohei Kawaguchi, MD, PhD, JAPAN Mei Lin Tay, PhD, NEW ZEALAND Bill Farrington, FRCS, NEW ZEALAND Rupert S Van Rooyen, MBChB, FRACS, NEW ZEALAND Matthew Walker, MBChB, FRACS, NEW ZEALAND Ali Bayan, MBChB, FRACS, NEW ZEALAND Simon W. Young, MD, FRACS, NEW ZEALAND
Influence of Femorotibial Posterior Overhang and Posterior Tibial Slope on Patellar Changes After TKA ePoster Presentation Shunsuke Utsumi, MD, JAPAN Takashi Aki, PhD, JAPAN Masayuki Kamimura, JAPAN Kento Harada, MD, JAPAN Toshimi Aizawa, JAPAN
Intra- and postoperative blood loss with and without use of tourniquet in knee arthroplasty. ePoster Presentation Kengo Kaji, MD, JAPAN Masaki Mori, MD, PhD, JAPAN Naoto Date, MD, JAPAN Masakazu Ishikawa, MD, PhD, JAPAN
Changes in the Posterior Tibial Slope among Patients undergoing Medial Unicompartmental Knee Arthroplasty do not affect the Medial Proximal Tibial Angle ePoster Presentation Lorenz Pichler, MD, AUSTRIA Rosa Berndt, MD, GERMANY Carsten Perka, MD, PhD, GERMANY Clemens Gwinner, MD, GERMANY Moses Kamal Dieter El Kayali, MD, GERMANY
Comparison Of Outcomes Of Revision Uka To Tka And Primary Tkas -A Propensity Matched Study. ePoster Presentation Myles R. J. Coolican, FRACS, AUSTRALIA Harbeer Ahedi, PhD Biomedical Sciences, AUSTRALIA
The Effects Of The Flexion Gap Setting On Postoperative Outcomes Of Tka Using The Mako Robotic Arm ePoster Presentation Shuhei Sugioka, MD, JAPAN Masayoshi Okuda, MD, PhD, JAPAN Yuki Kawaguchi, PT, JAPAN Yasuhito Tanaka, Prof., JAPAN
An Isakos Funded Study - Physical Activity Outcomes In Patellofemoral Vs. Total Knee Replacements: A Randomised Control Trial For Isolated Patellofemoral Joint Osteoarthritis . ePoster Presentation Martinique Vella-Baldacchino, MD, MRCS, PG CERT (HEALTH LEADERSHIP), IOC DIp Spo, UNITED KINGDOM Julie Heegaard, MD, DENMARK Snorre Stephensen, MD, DENMARK Soeren Rytter , MD, DENMARK Per Wagner Kristensen, MD, DENMARK Zahid Asghar , PhD, UNITED KINGDOM Alex D Liddle, MBBS BSc DPhil FRCS(Orth), UNITED KINGDOM Justin P. Cobb, BMBCh, FRCS, MCh, UNITED KINGDOM Anders Odgaard, DENMARK
Prospective Comparison Of Short-Term Outcomes In Kinematic And Mechanical Alignment Total Knee Arthroplasty ePoster Presentation Ofir Vinograd, MD , ISRAEL Netanel Steinberg, MD, ISRAEL Ahmad Essa, MPH MD, ISRAEL Dana Avraham, MD, ISRAEL Ilan Y Mitchnik, MD, ISRAEL Noam Shohat, MD, ISRAEL
Postoperative Varus-Valgus Stability and Short-Term Clinical Outcomes of Total Knee Arthroplasty Using the Unrestricted Kinematic Alignment Method for Severe Varus Deformity ePoster Presentation Yohei Okada, MD,PhD, JAPAN Atsushi Teramoto, MD, PhD, JAPAN Yasutoshi Ikeda, MD,PhD, JAPAN Shinichiro Okimura, MD, PhD, JAPAN Tomoaki Kamiya, MD, JAPAN Kazushi Horita, MD, JAPAN Kodai Hamaoka, MD, JAPAN
Investigation Of Factors Predicting Postoperative Alignment In Unicompartmental Knee Arthroplasty For Knees With Over 10 Degrees Of Varus Deformity. ePoster Presentation Masaki Mori, MD, PhD, JAPAN Naoto Date, MD, JAPAN Kengo Kaji, MD, JAPAN Masakazu Ishikawa, MD, PhD, JAPAN
Predicting And Preventing Overcorrection In Medial Unicompartmental Knee Arthroplasty: A Radiographic Study Based On Long-Leg Films And Valgus Stress Views. ePoster Presentation Stefano Gaggiotti, MD, ARGENTINA Constant Foissey, MD, FRANCE Cécile Batailler, MD, PhD, FRANCE Elvire Servien, MD, PhD, Prof., FRANCE Santino Gaggiotti, MD, ARGENTINA Gabriel Gaggiotti, MD, ARGENTINA Sebastien Lustig, MD, PhD, Prof., FRANCE
Learning Curves in 204 Robotic-Assisted Total Knee Replacements: Comparing Senior, Intermediate, and Senior-Junior Surgical Teams ePoster Presentation Hector Zamorano, MD, CHILE Roberto Yañez, MD,phD,prof, CHILE Sebastian Valdes, student, CHILE Gaston Caracciolo, CHILE Cristobal Yañez, MD, CHILE Sebastian Yanez, MD, CHILE Leonardo Javier Carabajal Vera, MD, ARGENTINA Lars Raymond Strömback, MD, CHILE Magaly Iñiguez, MD, CHILE
A Machine Learning-Powered Decision Tool to Predict the Risk of Knee Arthroplasty in Patients with Osteoarthritis Using Plain Radiographs and Routine Clinical Data ePoster Presentation Ahmed Elgebaly, MD, PhD, UNITED KINGDOM Atef Abdelrahman Hassan, MD, EGYPT Rawad K M Hammad, MD, UNITED KINGDOM Hassan Abdalla, MD, UNITED KINGDOM Mohamed A. Imam, MD, MSc, DSportMed, ELD (Oxon), PhD, FRCS, UNITED KINGDOM
Oxford Partial Knee Femoral Sizing Via Preoperative Mri Scan – A Novel Template Method ePoster Presentation Ritwik Kejriwal, FRACS(Orth), NEW ZEALAND
Cementless Total Knee Arthroplasty is Performed in Younger Patients ePoster Presentation Logan Finger, MD, UNITED STATES Nicole Don, MA, UNITED STATES Noah Feder, BA, UNITED STATES Kenneth Urish, MD, PhD Michael O'Malley, MD, UNITED STATES Brian Klatt, MD, UNITED STATES Johannes F. Plate, MD, PhD, UNITED STATES
Long-Term Mortality Outcomes In Total Knee Arthroplasty Patients Under 60 ePoster Presentation Samuel Jaeyoon Won, MD, KOREA, REPUBLIC OF Sang Hyo Kim, KOREA, REPUBLIC OF Heeyoon Chung, M.D., KOREA, REPUBLIC OF Wonseok Lee, MD, KOREA, REPUBLIC OF Chong Bum Chang, MD, PhD, KOREA, REPUBLIC OF
Robotic-Assisted Unicompartmental Knee Arthroplasty Shows Better Short-Term Results Than Conventional Technique. A Comparative Study. ePoster Presentation David H. Figueroa, MD, CHILE Maria Loreto Figueroa Berrios, MD, CHILE Carlos Nain Giugliano Rostion, Resident, CHILE Jorge Simon Isla, MD, CHILE Cristóbal Abarca, MD, CHILE Fernando Martin, MD, CHILE Federico Gili, MD, CHILE Alvaro Ferrer, MD, MSc, CHILE
Is Bi-Cruciate Stabilized Total Knee Arthroplasty Better Than Conventional Knee Arthroplasty In Knee Biomechanics During Gait? ePoster Presentation Kengo Harato, MD, PhD, JAPAN Kohei Nishizawa, PhD, JAPAN Shu Kobayashi, MD, PhD, JAPAN Kazuya Kaneda, MD, PhD, JAPAN Tatsuaki Matsumoto, MD, PhD, JAPAN Takeo Nagura, MD, JAPAN
Factors Affecting Final Saggital Alignment In Robotic Total Knee Replacement ePoster Presentation George Jacob, MBBS, MS Ortho, FAOrthA, INDIA Yoong Lim, BEng, PhD, AUSTRALIA David A. Parker, MBBS, BMedSc, FRACS, AUSTRALIA
High ten years survivorship and functional results of robotic-arm-assisted lateral unicompartmental knee arthroplasty ePoster Presentation Guido Maritan, MD, ITALY Mattia Berti, MD, ITALY Federico Roman, MD, ITALY Emanuele Furlan, MD, ITALY
A Novel Knee Intra-Operative Classification Of Osteo-Arthritis (KICO) ePoster Presentation Geoffrey Murphy, MD, AUSTRALIA Simon L. E. Walgrave, MD, BELGIUM Alexander S. Nicholls, MSc, FRACS, AUSTRALIA Myles R. J. Coolican, FRACS, AUSTRALIA David A. Parker, MBBS, BMedSc, FRACS, AUSTRALIA Brett A. Fritsch, MBBS BSc(Med), FRACS, FAOrthA, AUSTRALIA
Tourniquet use Does not Affect Bleeding and Surgical Time in Robotic Assisted Total Knee Arthroplasty ePoster Presentation João P.F. Guerreiro, MD, PhD, BRAZIL JOAO BALAN, MD, BRAZIL MARSAL VILHENA, MD, BRAZIL SERGIO MERÇON, MD, BRAZIL Paulo Roberto Bignardi, PhD, BRAZIL Marcus Vinicius Danieli, MD, PhD, BRAZIL
Short-term Outcomes of Robotic-Assisted Restricted Kinematic Alignment vs Mechanical Alignment in Unilateral Total Knee Arthroplasty ePoster Presentation Eiichi Shiigi, MD、PhD, JAPAN
EARLY LOOSENING OF THE FEMORAL STEM IN CEMENTED SEGMENTAL PROSTHESES WITH DISTAL FEMUR REPLACEMENT ePoster Presentation Clara Chimeno Pigrau, MD, SPAIN Marta Sabater Martos, Md, SPAIN Mariano Balaguer-Castro, MD, MSc, PhD, SPAIN Marc Ferrer Banús, MD, SPAIN Montserrat Monfort Mira, MD, SPAIN Dragos Popescu, MD, PhD, SPAIN Salvi Prat, SPAIN Joan Sugrañes, SPAIN Juan C. Martinez-Pastor, MD, SPAIN
Evaluating The Accuracy Of Imageless Robotic Assistance In Total Knee Replacement: A Study Of Mechanical Axis Correlation With Postoperative Radiographs ePoster Presentation Rodrigo Olivieri, MD, CHILE Piero Innocenti, MD, CHILE Jaime Ignacio Ugarte Checura, MD, CHILE Jose Ignacio Laso, Md, CHILE Marco Koch, MD, CHILE Jose Tomas Muñoz, MD, CHILE Sebastian Bianchi, MD, CHILE Nicolas Gaggero, MD, CHILE
Preservation of Pre-Arthritic Coronal Knee Phenotype and Pre-Arthritic Coronal Alignment Yielded Improved Kujala Scores Following Ligament-Guided Medial Unicompartmental Knee Arthroplasty ePoster Presentation Roderick J.M. Vossen, MD, UNITED STATES Joost Burger, MD, PhD, GERMANY Gaby Victoria Ten Noever De Brauw, NETHERLANDS Tarik Bayoumi, MD, NETHERLANDS Jake Fiore, Bsc, UNITED STATES Lindsey Ruderman, BA, UNITED STATES Hendrik Aernout Zuiderbaan, MD PhD, NETHERLANDS Andrew D. Pearle, MD, UNITED STATES

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Robotic-Assisted Total Knee Arthroplasty Improves Accuracy and Reproducibility Compared to Manual Instrumentation or Navigation.

Robotic-Assisted Total Knee Arthroplasty Improves Accuracy and Reproducibility Compared to Manual Instrumentation or Navigation.

Background

Methods

Results

Conclusion

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Robotic-Assisted Total Knee Arthroplasty Improves Accuracy and Reproducibility Compared to Manual Instrumentation or Navigation.

Robotic-Assisted Total Knee Arthroplasty Improves Accuracy and Reproducibility Compared to Manual Instrumentation or Navigation.

Background

Methods

Results

Conclusion

More 2025 ISAKOS Congress Content