Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Purpose: To compare different measurement techniques of the posterior tibial slope (PTS) on lateral radiographs with the actual in situ PTS and evaluate the effect of tibial malrotation and image section length.
Methods: Actual PTS was measured on eight fresh-frozen tibiae using a portable 6-axis measuring arm with an accuracy of ±0.01°. True lateral radiographs were taken in the neutral position and after applying 10/20/30° internal/external rotation (IR/ER) and 5/10/15° varus/valgus rotation. The PTS was measured radiographically using five different reference axes: anterior tibial cortex (ATC), anatomical tibial axis, proximal tibial anatomical axis (PTAA), posterior tibial cortex (PTC) and fibular shaft axis (FSA).
Results: The ATC and PTAA methods showed the lowest deviation from the actual PTS, while the PTC method showed the highest difference of 5.5 ± 1.5° (medial) and 7.1 ± 1.8° (lateral) among all tested methods ( < .001). The PTAA technique showed a 1.9 ± 1.4° (medial) and 2.9 ± 1.8° (lateral) difference from the actual slope (n.s.). ER caused the PTS to increase 0.7 ± 2.0° (10° ER, n.s.) to 3.4 ± 2.1° (30° ER, < .05), whereas IR caused the PTS to decrease 1.6 ± 1.3° (n.s) to 4.1 ± 1.7° ( < .05) when comparing to the PTAA method for the neutral position. Varus and valgus rotation showed the highest deviation from the neutral rotation at 15° valgus (3.1 ± 2.1°, n.s.).
Conclusion: Tibial slope measurements have a high degree of variability between different measurement methods, while the ATC and PTAA methods showed the least deviation from the actual PTS measured in this in vitro model. Malrotation resulted in a severe distortion of the PTS values, which may alter preoperative planning and intraoperative results. Therefore, radiographic PTS measurements may be contrasted with more objective, reproducible and reliable measuring methods.
Level Of Evidence: There is no level of evidence as this study was an experimental laboratory study.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11632255 | PMC |
| http://dx.doi.org/10.1002/jeo2.70108 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Tibia-Fibula Relative Motion During Gait Cycle by 2D-3D Registration.
J Orthop Res
September 2025
Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, Chaoyang District, China.
Injuries to the distal tibiofibular joint are often associated with ankle fractures, sports-related injuries, or instability, whereas proximal tibiofibular joint injuries are more commonly present with lateral- or posterolateral-compartment lesions of the knee. These conditions may be related to the relative motion between the tibia and fibula; however, precise movement patterns have yet to be fully elucidated. This study analyzes the relative motion of the tibia and fibula in 16 healthy adults (32 bones; 8 males and 8 females) throughout a normal gait cycle.
View Article and Find Full Text PDFUnicondylar intra-articular tibial plateau osteotomies provide favourable outcomes and avoid arthroplasty in posttraumatic deformities at 4-year mean follow-up.
Knee Surg Sports Traumatol Arthrosc
September 2025
Institute of Movement Sciences, Sainte-Marguerite Hospital, Aix-Marseille University, Marseille, France.
Purpose: This study aimed to evaluate the functional and radiological outcomes, complications and procedure survival in patients with posttraumatic tibial plateau deformities treated with unicondylar intra-articular tibial plateau osteotomy (UIATPO), comparing medial and lateral approaches.
Methods: A retrospective study was conducted on all patients with posttraumatic intra-articular tibial plateau deformities who underwent surgical correction at a single centre between 2016 and 2022, with a minimum follow-up of 24 months. Patient characteristics, radiological correction, patient-reported outcome measures (PROMs), including the Lysholm and knee injury and osteoarthritis outcome score (KOOS), and complications were recorded.
Robot-assisted total knee arthroplasty demonstrates superior radiological but comparable clinical outcomes compared to conventional techniques: A meta-analysis of prospective studies.
Knee Surg Sports Traumatol Arthrosc
September 2025
Department of Orthopaedic Surgery and Traumatology, Ghent University, Ghent, Belgium.
Purpose: Robot-assisted total knee arthroplasty (RATKA) aims to improve surgical precision and outcomes. This study compared clinical and radiological outcomes between RATKA and conventional total knee arthroplasty (CTKA).
Methods: A systematic review was conducted in accordance with PRISMA guidelines, including prospective studies (Level I/II evidence) from MEDLINE, Embase, Web of Science, and the Cochrane Library, up to 20 May 2025.
Image-based robotics enhance precision and efficiency in lateral UKA: A comparative study of 135 UKAs.
Knee Surg Sports Traumatol Arthrosc
September 2025
Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Hospices Civils de Lyon, Lyon North University Hospital, Lyon, France.
Purpose: Robotic-assisted lateral unicompartmental knee arthroplasty (UKA) remains technically demanding due to the complex biomechanics of the lateral compartment. Image-based (IBRA) and imageless (ILRA) robotic systems have both demonstrated superior accuracy compared to conventional mechanical instrumentation, but have not yet been directly compared in lateral UKA. This study aimed to evaluate their respective accuracy and surgical efficiency.
View Article and Find Full Text PDFSteeper medial posterior tibial slope is associated with bilateral ACL injuries: A radiographic comparison with unilateral cases.
J Exp Orthop
July 2025
Department of Orthopedic Surgery, Institute for Locomotion Aix-Marseille University Marseille France.
Purpose: The posterior tibial slope (PTS) plays a key role in knee biomechanics and may influence the risk of anterior cruciate ligament (ACL) rupture as well as the outcomes of its reconstruction. We hypothesised that a steeper medial posterior tibial slope (MPTS) would be associated with an increased risk of bilateral ACL reconstruction compared to unilateral reconstruction. This study aimed to test this hypothesis by comparing the MPTS between patients undergoing unilateral ACL reconstruction (uniACLR) and those requiring non-simultaneous bilateral ACL reconstruction (biACLR), using radiographic imaging.
View Article and Find Full Text PDF