Article
Orthopedics
Kaushik Hazratwala, Conor Gouk, Matthew P. R. Wilkinson, William B. O'Callaghan
Summary: This study reports the 2-year results of 165 consecutive cases of Computer Aided Surgery (CAS) Navigated Functional Alignment (FA) Total Knee Arthroplasty (TKA). The study shows that CAS FA TKA is a predictable, reliable, and reproducible technique with acceptable short-term revision rates and high patient-reported outcome measures (PROMs).
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2023)
Article
Biotechnology & Applied Microbiology
Chaohua Fang, Yichao Luan, Zhiwei Wang, Long Shao, Tiebing Qu, Cheng-Kung Cheng
Summary: The study shows that 5 degrees external rotation of the tibial component has the closest kinematics to the intact knee after TKA, and moderate external rotation can improve knee kinematics post TKA.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Orthopedics
M. Pietsch, M. Hochegger, O. Djahani, G. Mlaker, M. Eder-Halbedl, Th Hofstadter
Summary: This study retrospectively evaluated the postoperative outcomes of patients with complex EADs undergoing CAS-assisted constrained TKA, finding that the mechanical axis alignment was satisfactory, with improvements in KSS and range of motion. The use of CAS helped prevent anatomical conflicts and resulted in significant improvements in limb alignment and function postoperatively. No intra- or postoperative complications were reported.
ARCHIVES OF ORTHOPAEDIC AND TRAUMA SURGERY
(2021)
Article
Orthopedics
Ahmed Siddiqi, Hiba Anis, Ilya Borukhov, Nicolas S. Piuzzi
Summary: This study analyzed CT scans of healthy and osteoarthritic knees and found significant differences in the posterior condylar axis, condylar offset, and condylar radius, as well as tibial slope in both the sagittal and coronal planes.
JOURNAL OF BONE AND JOINT SURGERY-AMERICAN VOLUME
(2022)
Article
Health Care Sciences & Services
Matteo Innocenti, Luigi Zanna, Mustafa Akkaya, Kim Huber, Bernhard Christen, Tilman Calliess
Summary: Accurate positioning of prosthetic components is crucial for successful medial unicompartmental knee arthroplasty (mUKA). This study evaluated the use of femoral CT-based landmarks for setting tibial rotation in image-based robotic-assisted mUKA and found that it reliably achieved congruent knee kinematics with minimal deviations. The mean tibia component rotation relative to the femoral landmark was +0.24 degrees.
JOURNAL OF PERSONALIZED MEDICINE
(2023)
Article
Orthopedics
Francesco Zambianchi, Andrea Giorgini, Andrea Ensini, Vincenzo Lombari, Valerio Daffara, Fabio Catani
Summary: The study investigated femoral component alignment in patients undergoing soft tissue-guided, navigated TKA. Results showed that with a mechanically aligned tibial component and tensioned soft tissues, the femoral component was placed at an average of 1.7 degrees varus in the coronal plane, aligning with the preoperative distal femoral joint line. Satisfactory knee function and excellent pain relief were demonstrated postoperatively based on KOOS and KSS scores.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2021)
Article
Orthopedics
Gavin Clark, Richard Steer, David Wood
Summary: This study assessed the balance achievable with mechanical alignment and kinematic alignment plans, and found that functional alignment obtained significantly better balance. Overall balance was observed in 97% of functional alignment knees, 73% of kinematic alignment knees, and in 55% of mechanical alignment knees. Utilizing an individualized kinematic alignment plan allows functional alignment to best achieve the goals of maintaining joint line plane and obliquity.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2023)
Article
Orthopedics
A. Di Martino, B. Bordini, F. Barile, C. Ancarani, V. Digennaro, C. Faldini
Summary: This study analyzed long-term unicompartmental knee arthroplasty (UKA) data, finding that UKA has a lower perioperative complication rate, but a higher revision rate compared to total knee arthroplasty (TKA). It also found no correlation between the reason for implantation and prosthesis survival.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2021)
Article
Orthopedics
Matthias Meyer, Tobias Renkawitz, Florian Voellner, Achim Benditz, Joachim Grifka, Markus Weber
Summary: Both imageless navigation and conventional total knee arthroplasty enable accurate postoperative leg alignment with low complication rates and equally successful patient-reported outcome measures (PROMs) and responder rates one year postoperatively.
ARCHIVES OF ORTHOPAEDIC AND TRAUMA SURGERY
(2021)
Article
Orthopedics
Jean-Yves Jenny, Florent Baldairon, Michael T. Hirschmann
Summary: This study aimed to analyze the coronal alignment of a large population of patients undergoing total knee arthroplasty using a modern classification of knee phenotypes found in a non-osteoarthritic population. The distribution of functional knee phenotypes in patients undergoing total knee arthroplasty was found to be different from those in a reference non-osteoarthritic population, with a wider distribution in the OA group.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2022)
Article
Orthopedics
Sean E. Slaven, John P. Cody, Robert A. Sershon, Henry Ho, Robert H. Hopper, Kevin B. Fricka
Summary: The study compared implant alignment in successful and failed cases of UKA, finding limb alignment to be more crucial than tibial component alignment in determining outcomes during revision surgery.
JOURNAL OF ARTHROPLASTY
(2021)
Article
Orthopedics
Dohyung Lim, Dai-Soon Kwak, Minji Kim, Seoyeong Kim, Ho-Jung Cho, Jae Hyuk Choi, In Jun Koh
Summary: KA TKA was found to restore a more native amount and distribution of MCL strain compared to MA TKA. This suggests that KA TKA may lead to better performance and more normal knee sensations for patients.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2022)
Article
Orthopedics
H. Gene Dossett, Jaymeson R. Arthur, Justin L. Makovicka, Kristin C. Mara, Joshua S. Bingham, Henry D. Clarke, Mark J. Spangehl
Summary: The 13-year follow-up results of a randomized controlled trial comparing kinematically aligned and mechanically aligned total knee arthroplasty showed no significant difference between the two alignment methods in terms of reoperations, complications, and patient-reported outcome measures.
JOURNAL OF ARTHROPLASTY
(2023)
Article
Orthopedics
Ji Hoon Bae, Ja-Woon Lee, Soo-Hyun Kim, Sang-Gyun Kim, Young-Sik Jeon, Jeong Seok Choi
Summary: The study aimed to investigate the effects of the tibiofemoral synchronization technique on tibial torsion and lower limb rotation after primary total knee arthroplasty. The results showed that this technique had minimal impact on tibial torsion but resulted in changes in femoral anteversion and femoral neck-malleolar angle.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2022)
Article
Orthopedics
Andrew N. Clark, Adam Hounat, Sinead O'Donnell, Pauline May, James Doonan, Philip Rowe, Bryn G. Jones, Mark J. G. Blyth
Summary: This study found that there were continued improvements in clinical scores of patients in both conventional and navigated surgery groups at 5 years, with no statistical difference in patient-reported outcome measures. However, improved implant survivorship was observed in the navigated surgery group compared to the conventional group. Further research is needed to evaluate long-term implant survivorship and cost effectiveness of electromagnetic computer navigated technology.
JOURNAL OF ARTHROPLASTY
(2021)
Review
Orthopedics
Nolan B. Condron, Benjamin S. Kester, John M. Tokish, Matthias A. Zumstein, Reuben Gobezie, Markus Scheibel, Brian J. Cole
Summary: Orthoregeneration utilizes various orthopaedic biologics to enhance tissue healing after musculoskeletal injuries, including hyaluronic acid, platelet-rich plasma, and mesenchymal stromal cells. While promising, current studies have shown mixed results, highlighting the need for refinement of techniques and continued preclinical research.
ARTHROSCOPY-THE JOURNAL OF ARTHROSCOPIC AND RELATED SURGERY
(2021)
Article
Critical Care Medicine
Mauro Maniglio, William Fraipont, Remy Flueckiger, Matthias A. Zumstein, Michelle H. McGarry, Thay Q. Lee
Summary: Ulnar styloid fractures (USF) in the presence of distal radius fractures often require surgical treatment to counteract forces on the distal radioulnar joint (DRUJ). Biomechanical comparison of different techniques showed that tension band wiring (TBW) and suture anchor were superior in restoring both translational and rotational stability of the DRUJ.
INJURY-INTERNATIONAL JOURNAL OF THE CARE OF THE INJURED
(2021)
Article
Orthopedics
Mauro Maniglio, Il Jung Park, Michael Kuenzler, Matthias A. Zumstein, Michelle H. McGarry, Thay Q. Lee
Summary: Clinical studies suggest that untreated basal ulnar styloid fractures may not affect patient outcomes. In a biomechanical cadaveric model, it was found that some ligament components still remain attached to the ulnar head in the presence of a foveal fracture, providing residual stability to the distal radioulnar joint.
JOURNAL OF HAND SURGERY-EUROPEAN VOLUME
(2022)
Article
Orthopedics
J. Tomas Rojas, Bernhard Jost, Ralph Hertel, Claudio Zipeto, Floris Van Rooij, Matthias A. Zumstein
Summary: This study compared the deviation between planned and postosteotomy humeral inclination, retrotorsion, and height in shoulder arthroplasty using patient-specific instrumentation (PSI) vs. standard cutting guides (SCG). The results showed that PSI had less deviation and fewer outliers compared to SCG, indicating the potential of PSI in improving humeral osteotomy.
JOURNAL OF SHOULDER AND ELBOW SURGERY
(2022)
Article
Orthopedics
J. Tomas Rojas, Alexandre Ladermann, Sean Wei Loong Ho, Mustafa S. Rashid, Matthias A. Zumstein
Summary: Component positioning is crucial in reverse shoulder arthroplasty for successful outcomes. Navigated augmented reality (AR) systems, using a head-mounted display, have been developed to assist surgeons in implementing their preoperative plans. This article provides a step-by-step guide on using a navigated AR system for placing the glenoid bony-augmented component.
ARTHROSCOPY TECHNIQUES
(2022)
Article
Orthopedics
Michael B. B. Kuenzler, Michelle H. H. McGarry, Masaki Akeda, Hansel Ihn, Agnieszka Karol, Brigitte von Rechenberg, Michael O. O. Schaer, Matthias A. A. Zumstein, Thay Q. Q. Lee
Summary: This study aimed to examine the feasibility of oral PARP-1 inhibition and investigate its influence on rat supraspinatus enthesis and muscle healing after rotator cuff repair. The results showed that oral veliparib was safe for the rats and improved enthesis healing and muscle fiber size. Therefore, it can be considered as a potential treatment to promote healing after rotator cuff tear.
AMERICAN JOURNAL OF SPORTS MEDICINE
(2023)
Article
Orthopedics
Lukas M. Dommer, Adrian Chlasta, J. Tomas Rojas, Annabel Hayoz, Michael Schar, Matthias A. Zumstein
Summary: This study evaluated the midterm clinical and radiologic outcomes of using synthetic patch augmentation in repairing massive rotator cuff tears with good muscle quality but short tendon length. The results showed that patch augmented repairs led to significant improvement in functional and structural outcomes, and partial reruptures were not associated with inferior functional outcomes.
JOURNAL OF SHOULDER AND ELBOW SURGERY
(2023)
Article
Orthopedics
J. Tomas Rojas, Bernhard Jost, Claudio Zipeto, Piero Budassi, Matthias A. Zumstein
Summary: In this study, the use of a navigated AR system through an HMD for RSA resulted in minimal deviation between planned and postoperative values and between intra- and postoperative parameters.
JOURNAL OF SHOULDER AND ELBOW SURGERY
(2023)
Article
Medicine, General & Internal
Hanspeter Hess, Adrian C. Ruckli, Finn Burki, Nicolas Gerber, Jennifer Menzemer, Juergen Burger, Michael Schar, Matthias A. Zumstein, Kate Gerber
Summary: This study proposes a deep learning network for automatic segmentation of anatomical structures in rotator cuff tear patients, which includes integrated automatic result verification. Trained on a dataset of 111 patients and tested on 60 patients, the network achieved an average Dice coefficient of 0.91 +/- 0.06 for segmenting the humerus, scapula, and rotator cuff muscles.
Article
Orthopedics
Stefan Bauer, Phillipe Collin, Matthias A. Zumstein, Lionel Neyton, William G. Blakeney
Summary: Chronic traumatic anterior shoulder instability refers to recurrent trauma-associated shoulder instability that requires assessment of three anatomic lesions: a capsuloligamentous and/or labral lesion, anterior glenoid bone loss, and a Hill-Sachs lesion. Surgical treatment is usually necessary, but there is controversy regarding how to evaluate risk factors to determine the appropriate procedure. Patient risk factors for recurrence include age, hyperlaxity, and participation in competitive, contact, and overhead sports. Trauma-related factors include soft tissue lesions and bone loss, which have implications for treatment. Different treatment options are discussed and compared based on complications, return to sports parameters, short- and long-term outcomes, and the risk of osteoarthritis. Arthroscopic Bankart and open Latarjet procedures have a steep learning curve, and the development of osteoarthritis is associated with the number of previous dislocations and surgical techniques. Latarjet-type procedures have the lowest rate of dislocation recurrence and, when performed correctly, do not appear to increase the risk of osteoarthritis.
EFORT OPEN REVIEWS
(2023)
Article
Orthopedics
J. Tomas Rojas, Mustafa S. Rashid, Matthias A. Zumstein
EFORT OPEN REVIEWS
(2023)
Article
Emergency Medicine
S. Bauer, B. Dietz, P. Collin, L. Neyton, W. Blakeney, M. Zumstein
Summary: Chronic posttraumatic shoulder instability is a trauma-related condition characterized by recurrent dislocations. Surgical treatment, such as arthroscopic Bankart repair (ABR), Latarjet, or alternative procedures, is usually needed. Risk factors including patient age, hyperlaxity, sports profile, and bone loss should be considered when deciding on the surgical approach. ABR provides high patient satisfaction and return to sports, but there is a risk of recurrent dislocations, especially in the presence of risk factors. Latarjet or bone block procedures offer sustainable stability and can be used as a revision procedure, but they can also be used as a primary treatment for chronic instability, depending on the risk factors.
Article
Emergency Medicine
S. Bauer, B. Dietz, P. Collin, L. Neyton, W. Blakeney, M. Zumstein
Meeting Abstract
Medicine, General & Internal
Raphael Blunier, Marvin Lucas Frommer, Matthias Zumstein, Michael Schar
SWISS MEDICAL WEEKLY
(2022)
Meeting Abstract
Medicine, General & Internal
Adrian Chlasta, Lukas Dommer, Tomas Rojas, Annabel Hayoz, Michael Schar, Matthias A. Zumstein
SWISS MEDICAL WEEKLY
(2022)