Efficacy of Prophylactic Knee Bracing in Sports
J Knee Surg DOI: 10.1055/s-0041-1740930Anterior cruciate ligament (ACL) and medial collateral ligament (MCL) injuries are common knee injuries, which can result from contact and noncontact during sports, recreation, or work-related activities. Prophylactic knee braces (PKBs) have been designed to protect the knee and decrease risk of recurrence of these injuries. Despite their success, PKBs have not been proven to be consistently effective and cost of the device must be evaluated to optimize its use in sports, particularly American football. Biomechanical studies have suggested that increased hip and knee flexion angles ma...
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: Blecha, Kyle Nuelle, Clayton W. Smith, Patrick A. Stannard, James P. Ma, Richard Tags: Special Focus Section Source Type: research
Static Mediolateral Tilt of the Joint Line after Total Knee Arthroplasty Does Not Reflect Dynamic Tilt during a Stair Ascent Activity
J Knee Surg DOI: 10.1055/s-0041-1740999The correlation between static and dynamic mediolateral (ML) tilts of the joint line in the coronal plane remains unknown after total knee arthroplasty (TKA). The purpose was to evaluate the ML tilt as measured by two-dimensional to three-dimensional registration during stair ascent in TKA patients, and to examine the correlation between the dynamic ML tilt and radiographic measurements of static indices. Thirty-two knees that underwent TKA using the mechanical alignment method were included. Continuous sagittal fluoroscopy was taken from before initial contact (IC) until after the to...
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: Yabu, Kazuma Nakamura, Shinichiro Kuriyama, Shinichi Nishitani, Kohei Ito, Hiromu Song, Young Dong Morita, Yugo Yamawaki, Yusuke Matsuda, Shuichi Tags: Original Article Source Type: research
Bone-on-Bone Contact on Radiograph is not a Prerequisite for Successful Outcome in Fixed-Bearing Medial Unicompartmental Knee Arthroplasty —A 10-Year Follow-Up Study
Conclusion Symptomatic patients with varying degrees of arthritis on preoperative radiographs had comparable clinical outcomes. We conclude that symptomatic patients with clinical and radiographic evidence of medial compartment osteoarthritis of any grade can benefit from a fixed-bearing medial unicompartmental knee arthroplasty. [...] Thieme Medical Publishers, Inc. 333 Seventh Avenue, 18th Floor, New York, NY 10001, USAArticle in Thieme eJournals: Table of contents | Abstract | Full text (Source: Journal of Knee Surgery)
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: Wong, Khai Cheong Lee, Merrill Liow, Lincoln Lo, Ngai-Nung Yeo, Seng-Jin Chen, Jerry Tags: Original Article Source Type: research
Measurement of Medial Tibial Eminence Dimensions for the Clinical Evaluation of ACL-Injured Knees: A Comparison between CT and MRI
J Knee Surg DOI: 10.1055/s-0041-1741393Anterior cruciate ligament (ACL) injuries commonly lead to translational and rotational tibiofemoral instability. The morphology of the medial tibial eminence (MTE) has received increased attention regarding its role in tibiofemoral stability in ACL-injured knees. Therefore, quantification of MTE dimensions on clinical imaging may help clinicians predict knee stability after ACL injury. Although magnetic resonance imaging (MRI) is routinely obtained in patients with ACL injuries, whether the dimensions of the MTE can be accurate quantified on MRI is unknown. The purpose of this study ...
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: Stepanyan, Hayk Nazaroff, Jaron Le, Ngoc Parker, Robert Tando, Toshimi Yoshioka, Hiroshi Wang, Dean Tags: Original Article Source Type: research
The Learning Curve of Reaching the Planned Limb Alignment in Robotic-Arm-Assisted Total Knee Arthroplasty
J Knee Surg DOI: 10.1055/s-0041-1741001Evidence on the learning curve associated with robotic-arm-assisted total knee arthroplasty (ra-TKA) is scarce and mostly based on operative time. Thus, the objective of this study was to assess a surgeon's learning experience based on accuracy to reach planned limb alignment and its impact on surgical-characteristics, limb-alignment, and perioperative-outcomes. A retrospective chart review was conducted on a consecutive series of 204 primary ra-TKAs (patients), performed by a single surgeon in a single institution (3/7/2018-to-6/18/2019). Cumulative summation control sequential analy...
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: Pannu, Tejbir S. Villa, Jesus M. Schultz, Isaac Barsoum, Wael K. Higuera, Carlos A. Patel, Preetesh D. Tags: Original Article Source Type: research
Comparison of Clinical Outcomes after Revision Anterior Cruciate Ligament Reconstruction using a Bone-patellar Tendon-bone Autograft and that Using a Double-Bundle Hamstring Tendon Autograft
Conclusion Revision ACLR with a BPTB autograft was associated with superior results regarding restoration of knee joint stability as compared with that with a double-bundle HT autograft, whereas double-bundle HT autograft was superior to BPTB autograft in terms of patient-reported outcomes of pain. The rest of the patient-reported outcomes were equal between the two groups. [...] Thieme Medical Publishers, Inc. 333 Seventh Avenue, 18th Floor, New York, NY 10001, USAArticle in Thieme eJournals: Table of contents | Abstract | Full text (Source: Journal of Knee Surgery)
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: Katagiri, Hiroki Nakagawa, Yusuke Miyatake, Kazumasa Ozeki, Nobutake Kohno, Yuji Amemiya, Masaki Sekiya, Ichiro Koga, Hideyuki Tags: Original Article Source Type: research
Clinical and Functional Outcomes of Total Knee Arthroplasty in Sarcopenia: A Case –Control Retrospective Cohort Study
Conclusion Patients with sarcopenia present with generally poorer preoperative health and this appears to be associated with lower patient-reported clinical and functional outcome scores. Complication rates were higher among patients with sarcopenia who were still determined to have adequate health status to support TKA. Most complications were limited and could be managed with supportive treatment. [...] Thieme Medical Publishers, Inc. 333 Seventh Avenue, 18th Floor, New York, NY 10001, USAArticle in Thieme eJournals: Table of contents | Abstract | Full text (Source: Journal of Knee Surgery)
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: He, Zili Cai, Jie Wang, Xingyu Lu, Di Tags: Original Article Source Type: research
Surgical Epicondylar Axis of the Knee and Its Relationship to the Axial Tibia Alignment in Knee Osteoarthritis: The Concept of Proximal Twist Tibia
J Knee Surg DOI: 10.1055/s-0041-1740998The proximal tibia and distal femur are intimately linked with the biomechanics of the knee and they are to be considered in total knee arthroplasty (TKA). The aim of the present study was to evaluate the proximal tibial torsion (PTT) in relation to surgical epicondylar axis (SEA) in a healthy cohort and a pathological cohort affected by knee osteoarthritis (OA). We retrospectively analyzed computed tomography of OA knee of 59 patients before they underwent TKA and nonarthritic knee of 39 patients as control. Posterior condylar angle (PCAn), femoral tibial torsion (SEA-proximal tibial...
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: Farinelli, Luca Baldini, Marco Faragalli, Andrea Carle, Flavia Ulisse, Serena Gigante, Antonio Tags: Original Article Source Type: research
Different Doses of Intravenous Tranexamic Acid in Revision Total Knee Arthroplasty: A Retrospective Study
Conclusion Applying the dose of intravenous TXA equal or greater than 3 g in revision TKA might further reduce the blood loss and shorten the length of stay. [...] Thieme Medical Publishers, Inc. 333 Seventh Avenue, 18th Floor, New York, NY 10001, USAArticle in Thieme eJournals: Table of contents | Abstract | Full text (Source: Journal of Knee Surgery)
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: Chen, Liyile Zhao, Chenchen Luo, Yue Wang, Qiuru Li, Qianhao Kang, Pengde Tags: Original Article Source Type: research
A Comparative Study of Clinical Outcomes and Functional Status after Knee Fracture and Knee Fracture Dislocation
This study was an analysis of a series of tibial plateau fractures, in which FD was defined as a fracture of the tibial plateau with an associated loss of congruent joint reduction and stability of the knee, and classified by the Moore system. Patient data collected included demographics, injury information, and functional outcomes (short musculoskeletal function assessment [SMFA] score and Pain by the visual analog scale). Clinical outcomes at follow-up were recorded including knee range of motion, knee stability and development of complications. There were a total of 325 tibial plateau fracture patients treated operative...
Source: Journal of Knee Surgery - December 24, 2021 Category: Orthopaedics Authors: Bird, Mackenzie L Chenard, Kristofer E Gonzalez, Leah J Konda, Sanjit R Leucht, Philipp Egol, Kenneth A Tags: Original Article Source Type: research
Factors Affecting 30-Day Mortality following Primary Elective Total Knee Arthroplasty: A Database Study of 326,157 Patients
J Knee Surg DOI: 10.1055/s-0041-1740386Despite its rarity, the risk of mortality following primary elective total knee arthroplasty (TKA) is a critical component of surgical decision-making and patient counseling. The purpose of our study was to (1) determine the overall 30-day mortality rate for unilateral primary elective TKA patients, (2) determine the 30-day mortality rates when stratified by age, comorbidities, and preoperative diagnosis, and (3) identify the distribution of (i) patient demographics, (ii) baseline comorbidities, and (iii) preoperative diagnoses between mortality and mortality-free cohorts. A total of ...
Source: Journal of Knee Surgery - December 17, 2021 Category: Orthopaedics Authors: Zhai, Kevin Orr, Melissa Grits, Daniel Emara, Ahmed K. Rothfusz, Christopher A. Piuzzi, Nicolas S. Tags: Original Article Source Type: research
Lateral Patellar Inclination Angle Measured via a Two-Image Technique on Axial Magnetic Resonance Imaging
J Knee Surg DOI: 10.1055/s-0041-1740389Lateral patellar inclination (LPI) measures patellar tilt and is historically described on axial X-ray or a single magnetic resonance image (MRI). Given the variability in patellar height, LPI may be better represented by performing this measurement on two separate axial MRI images. We hypothesized that a two-image LPI measurement would be different from the current single-image LPI and have similar, if not superior reliability. Sixty-five patients treated for patellar instability (PI) between 2014 and 2017 were identified. Single image and two-image LPI were measured on axial MRI ima...
Source: Journal of Knee Surgery - December 17, 2021 Category: Orthopaedics Authors: Pace, James Lee Joseph, Sheeba M. Cheng, Christopher Solomito, Matthew J. Tags: Original Article Source Type: research
The Medial Tibial Plateau Can Be Used as a Direct Anatomical Reference for the Posterior Tibial Slope in Medial Unicompartmental Knee Arthroplasty
J Knee Surg DOI: 10.1055/s-0041-1740384There has been no consensus about how to determine the individual posterior tibial slope (PTS) intraoperatively. The purpose of this study was to investigate whether the tibial plateau could be used as a reference for reproducing individual PTS during medial unicompartmental knee arthroplasty (UKA). Preoperative computed tomography (CT) data from 48 lower limbs for medial UKA were imported into a three-dimensional planning software. Digitally reconstructed radiographs were created from the CT data as the lateral knee plain radiographs and the radiographic PTS angle was measured. Then,...
Source: Journal of Knee Surgery - December 17, 2021 Category: Orthopaedics Authors: Mori, Shigeshi Akagi, Masao Moritake, Akihiro Tsukamoto, Ichiro Yamagishi, Kotaro Inoue, Shinji Nakagawa, Koichi Togawa, Daisuke Tags: Original Article Source Type: research
Imaging of Noncontact Anterior Cruciate Ligament Injuries and Associated Bone Marrow Contusion Patterns
J Knee Surg DOI: 10.1055/s-0041-1740393Anterior cruciate ligament (ACL) tears are commonly associated with bone contusions. Bone contusions can lend important insight into increased risk for more subtle concurrent injuries based on common injury mechanisms and patterns, as higher energy trauma has been tied to patterns of specific bone contusions and concomitant injuries. Lateral compartment contusions are most common and occur in pivot shift injuries. Medial compartment contusions may represent a contrecoup mechanism after the initial lateral injuries. Patellotibial contusions require axial loading but are also typically ...
Source: Journal of Knee Surgery - December 13, 2021 Category: Orthopaedics Authors: Pringle, Lauren Wissman, Rob Tags: Special Section Article Source Type: research
Biomechanical Comparison of Kinematic and Mechanical Knee Alignment Techniques in a Computer Simulation Medial Pivot Total Knee Arthroplasty Model
This study aimed to compare motions, contact forces, and contact stress between mechanically aligned (MA) and KA (medial tilt 3° [KA3] and 5° [KA5]) models in MPK. An MPK design was virtually implanted with MA, KA3, and KA5 in a validated musculoskeletal computer model of a healthy knee, and the simulation of motion and contact forces was implemented. Anteroposterior (AP) positions, mediolateral positions, external rotation angles of the femoral component relative to the tibial insert, and tibiofemoral contact forces were evaluated at different knee flexion angles. Contact stresses on the tibial insert were calculated us...
Source: Journal of Knee Surgery - December 10, 2021 Category: Orthopaedics Authors: Song, Young Dong Nakamura, Shinichiro Kuriyama, Shinichi Nishitani, Kohei Ito, Hiromu Morita, Yugo Yamawaki, Yusuke Matsuda, Shuichi Tags: Original Article Source Type: research
