An Anatomic Investigation Into the Relationship Between Posterior Condylar Offset and Posterior Tibial Slope of One Thousand One Hundred Thirty-Eight Cadaveric Knees

2017 ◽  
Vol 32 (5) ◽  
pp. 1659-1664.e1 ◽  
Author(s):  
Douglas S. Weinberg ◽  
Jeremy J. Gebhart ◽  
Glenn D. Wera
Keyword(s):  
Tibial Slope ◽  
Posterior Tibial Slope ◽  
Posterior Condylar Offset ◽  
Posterior Tibial ◽  
Posterior Condylar ◽  
The Relationship

scholarly journals Measurement of femoral posterior condylar offset and posterior tibial slope in normal knees based on 3D reconstruction

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Liangxiao Bao ◽  
Shengwei Rong ◽  
Zhanjun Shi ◽  
Jian Wang ◽  
Yang Zhang
Keyword(s):  
Three Dimensional ◽  
Surgical Techniques ◽  
Inverse Correlation ◽  
Tibial Slope ◽  
Posterior Tibial Slope ◽  
Lateral Side ◽  
Posterior Condylar Offset ◽  
Posterior Tibial ◽  
Significant Difference ◽  
Posterior Condylar

Abstract Background Femoral posterior condylar offset (PCO) and posterior tibial slope (PTS) are important for postoperative range of motion after total knee arthroplasty (TKA). However, normative data of PCO and PTS and the correlation between them among healthy populations remain to be elucidated. The purpose of this study was to determine PCO and PTS in normal knees, and to identify the correlation between them. Methods Eighty healthy volunteers were recruited. CT scans were performed followed by three-dimensional reconstruction. PCO and PTS were measured and analyzed, as well as the correlation between them. Results PTS averaged 6.78° and 6.11°, on the medial and lateral side respectively (P = 0.002). Medial PCO was greater than lateral (29.2 vs. 23.8 mm, P <  0.001). Both medial and lateral PCO of male were larger than female. On the contrary, male medial PTS was smaller than female, while there was no significant difference of lateral PTS between genders. There was an inverse correlation between medial PCO and PTS, but not lateral. Conclusions Significant differences exhibited between medial and lateral compartments, genders, and among individuals. An inverse correlation exists between PCO and PTS in the medial compartment. These results improve our understanding of the morphology and biomechanics of normal knees, and subsequently for optimising prosthetic design and surgical techniques.

The relationship between the posterior tibial slope and the sagittal femoral condylar shape: Two circles and ellipses

2020 ◽  
Vol 33 (7) ◽  
pp. 1075-1081
Author(s):  
Zheng Zhang ◽  
Mingyang Liu ◽  
Xiaoyu Wen ◽  
Shiwei Liu ◽  
Guanpeng Zhang ◽  
...  
Keyword(s):  
Tibial Slope ◽  
Posterior Tibial Slope ◽  
Posterior Tibial ◽  
The Relationship

scholarly journals Posterior tibial slope is a modifiable predictor of relatively large extension gaps in total knee arthroplasty for degenerative osteoarthritis

2021 ◽  
Vol 29 (1) ◽  
pp. 230949902110020
Author(s):  
Kyun-Ho Shin ◽  
Sang-Bum Kim ◽  
Ki-Mo Jang ◽  
Chul-Soo Lee ◽  
Seung-Beom Han
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Slope ◽  
Joint Line ◽  
Posterior Tibial Slope ◽  
Weighting Method ◽  
Posterior Tibial ◽  
Posterior Condylar ◽  
Total Knee ◽  
Extension Gap

Background: During total knee arthroplasty (TKA) for osteoarthritis, the sagittal gap imbalance (SGI) with a relatively large extension gap is an important surgical challenge. We determined the predictors of SGI with a relatively large extension gap and evaluated the surgical outcomes of knees with SGI. Methods: 551 consecutive cases of primary TKA for osteoarthritis were retrospectively reviewed. The cohort was divided into two groups according to the SGI and statistically matched according to baseline characteristics via the inverse probability of treatment weighting method. Multiple linear and logistic regression analyses were performed to determine the predictors of sagittal gap difference (SGD) and SGI. Intergroup differences in clinical and radiological outcomes were analyzed. Results: Of all the knees included, 8.5% (n = 45) presented with SGI with a relatively large extension gap and required femoral sagittal balancing to manage SGI. The hyperextension angle (HA), preoperative joint line convergence angle (JLCA), and the change in posterior tibial slope (PTS) significantly correlated to SGD and predicted SGI with a relatively large extension gap. SGI group showed significant changes in femoral posterior condylar offset and joint line height compared to those without SGI (1.48 vs −0.45, 1.37 vs −0.51, respectively). Postoperative ROM and knee society knee scores were lower in SGI group. Conclusion: Knees requiring sagittal balancing to manage SGI with a relatively large extension gap is not uncommon in TKA for osteoarthritic knees. The change in PTS is an independent and modifiable predictor of SGI.

scholarly journals Biomechanical Effects of Posterior Condylar Offset and Posterior Tibial Slope on Quadriceps Force and Joint Contact Forces in Posterior-Stabilized Total Knee Arthroplasty

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Kyoung-Tak Kang ◽  
Yong-Gon Koh ◽  
Juhyun Son ◽  
Oh-Ryong Kwon ◽  
Jun-Sang Lee ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Contact Stress ◽  
Knee Arthroplasty ◽  
Tibial Slope ◽  
Posterior Stabilized ◽  
Posterior Condylar Offset ◽  
Posterior Tibial ◽  
Posterior Condylar ◽  
Total Knee ◽  
Quadriceps Force

This study aimed to determine the biomechanical effect of the posterior condylar offset (PCO) and posterior tibial slope (PTS) in posterior-stabilized (PS) fixed-bearing total knee arthroplasty (TKA). We developed ±1, ±2, and ±3 mm PCO models in the posterior direction and −3°, 0°, 3°, and 6° PTS models using a previously validated FE model. The influence of changes in the PCO and PTS on the biomechanical effects under deep-knee-bend loading was investigated. The contact stress on the PE insert increased by 14% and decreased by 7% on average as the PCO increased and decreased, respectively, compared to the neutral position. In addition, the contact stress on post in PE insert increased by 18% on average as PTS increased from −3° to 6°. However, the contact stress on the patellar button decreased by 11% on average as PTS increased from −3° to 6° in all different PCO cases. The quadriceps force decreased by 14% as PTS increased from −3° to 6° in all PCO models. The same trend was found in patellar tendon force. Changes in PCO had adverse biomechanical effects whereas PTS increase had positive biomechanical effects. However, excessive PTS should be avoided to prevent knee instability and subsequent failure.

Medial Meniscal Posterior Horn Tears Are Associated With Increased Posterior Tibial Slope: A Case-Control Study

2020 ◽  
Vol 48 (7) ◽  
pp. 1702-1710 ◽  
Author(s):  
Hyun-Soo Moon ◽  
Chong-Hyuk Choi ◽  
Min Jung ◽  
Dae-Young Lee ◽  
Kwang-Sik Eum ◽  
...  
Keyword(s):  
Knee Joint ◽  
Meniscal Tear ◽  
Tibial Slope ◽  
Posterior Horn ◽  
Posterior Tibial Slope ◽  
Control Group ◽  
Posterior Tibial ◽  
Contralateral Knee ◽  
The Mean ◽  
The Relationship

Background: While the medial meniscal posterior horn (MMPH) is reported to bear a considerable portion of overall load on the knee joint, including compressive and shear forces, no study has yet investigated the relationship between the MMPH and posterior tibial slope (PTS), which is a geometric factor associated with the shear force component in the presence of a compressive load in the knee joint. Hypothesis/Purpose: The purpose was to investigate the relationship between the PTS and MMPH tears in patients without ligamentous injury. It was hypothesized that the PTS is greater in patients with MMPH tears as compared with those without. Study Design: Cohort study; Level of evidence, 3. Methods: From March 2015 to December 2018, 159 patients with isolated MMPH tears and 60 patients without any pathologic findings on magnetic resonance imaging (control group) were included in this study. The PTS in the affected and contralateral knees was compared between the groups, which were statistically matched according to baseline characteristics (ie, age, sex, body mass index, radiographic osteoarthritis grade according to the Kellgren-Lawrence scale, and hip-knee-ankle angle) via the inverse probability of treatment weighting method. Furthermore, the MMPH tear group was subdivided according to meniscal tear patterns; these subgroups were then compared with the control group. Results: The mean PTS was significantly greater in the MMPH tear group than in the control group (affected knee: MMPH tear group, 7.0°± 3.4° [mean ± SD]; control group, 5.2°± 2.1°, P < .001; contralateral knee: MMPH tear group, 6.7°± 3.3°; control group, 4.7°± 2.2°, P < .001). The mean PTS in each subgroup also tended to be greater than that in the control group. In the receiver operating characteristic curve analysis, the cutoff point of the PTS discriminating between the MMPH tear and control groups was 6.6° for the affected knee (sensitivity, 55.3%; specificity, 75.0%) and 5.5° for the contralateral knee (sensitivity, 61.0%; specificity, 76.7%). Conclusion: An increased PTS is strongly associated with an increased incidence of MMPH tears and less affected by the meniscal tear patterns.

scholarly journals Posterior tibial slope: the fingerprint of the tibial bone

2021 ◽  
Author(s):  
Philipp W. Winkler ◽  
Brian M. Godshaw ◽  
Jon Karlsson ◽  
Alan M. J. Getgood ◽  
Volker Musahl
Keyword(s):  
Tibial Slope ◽  
Posterior Tibial Slope ◽  
Posterior Tibial ◽  
Tibial Bone
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