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.

Influence of posterior tibial slope on three-dimensional femorotibial alignment under weightbearing conditions in healthy Japanese elderly people

2021 ◽  
pp. 1-12
Author(s):  
Ryota Katsumi ◽  
Takashi Sato ◽  
Tomoharu Mochizuki ◽  
Satoshi Watanabe ◽  
Osamu Tanifuji ◽  
...  
Keyword(s):  
Sagittal Plane ◽  
External Rotation ◽  
Weight Bearing ◽  
Linear Regression Analysis ◽  
Three Dimensional ◽  
Tibial Slope ◽  
Rotational Alignment ◽  
Posterior Tibial Slope ◽  
Posterior Tibial ◽  
Japanese Elderly

BACKGROUND: Assessment of three-dimensional (3D) femorotibial alignment is essential for successful knee osteoarthritis treatment in the elderly. The complex morphology of the posterior tibial slope (PTS) might have an influence on sagittal and rotational alignment and the positional relationship between the femur and tibia in the anterior–posterior (AP) direction under weight-bearing conditions. OBJECTIVE: This study aimed to clarify the association between the PTS and 3D femorotibial alignment under weight-bearing conditions in healthy Japanese elderly individuals. METHODS: We investigated the 3D femorotibial alignment of 110 lower extremities of 55 healthy individuals (26 women, 29 men, mean age: 70 ± 6 years). Using our previously reported 3D-to-2D image registration technique, we evaluated the 3D hip-knee-ankle angle (3DHKA) in the sagittal plane, rotational alignment, and the distance between the femoral and tibial origins in the AP direction (tibial AP position) as femorotibial alignment parameters under weight-bearing conditions. We assessed the medial and lateral PTS and their angular difference (PTS difference) as PTS parameters. Stepwise multiple linear regression analysis was performed using PTS parameters and other possible confounders (age, sex, height, and weight) as the independent variables and femorotibial alignment parameters as the dependent variable. RESULTS: Weight (𝛽 = 0.393, p < 0.001) and lateral PTS (𝛽 = 0.298, p < 0.001) were the predictors associated with 3DHKA in the sagittal plane. Lateral PTS (𝛽 = 0.304, p = 0.001) was the only predictor associated with the tibial AP position. Sex (𝛽 = −0.282, p = 0.002) and PTS difference (𝛽 = −0.231, p = 0.012) were associated with rotational alignment. CONCLUSIONS: We found that a steeper lateral PTS resulted in a more flexed knee and anterior tibia. The PTS difference was positively correlated with tibial external rotation. Our data could be used as the standard reference for realignment surgery to ensure PTS is appropriately maintained.

scholarly journals Estimation of the posterior tibial slope on magnetic resonance images in Serbian population

2018 ◽  
Vol 75 (2) ◽  
pp. 154-158
Author(s):  
Natasa Janjusevic ◽  
Maja Vulovic ◽  
Aleksandar Radunovic ◽  
Milan Jovanovic ◽  
Jasenka Vasic-Vilic ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Tibial Plateau ◽  
Statistical Tests ◽  
Tibial Slope ◽  
Magnetic Resonance Images ◽  
Posterior Tibial Slope ◽  
Mean Values ◽  
Posterior Tibial ◽  
Significant Difference ◽  
Medial Tibial Slope

Background/Aim. Preservation of an adequate posterior tibial slope (PTS) during total knee arthroplasty is crucial for the biomechanical stability and function of the knee joint. Studies that investigated anatomical features of the tibial plateau found significant gender and inter-population differences in all components of the PTS. The aim of this study was to establish reference values of PTS in Serbian population and to explore if there is any difference in the tibial plateau inclination between genders. Methods. We retrospectively reviewed 161 magnetic resonance images (MRIs) of the knee of adult patients examined in Medical Military Academy in Belgrade, Serbia, in a period from November 2011 to September 2014. Measurements of PTS components: medial tibial slope (MTS), lateral tibial slope (LTS), and coronal tibial slope (CTS) were performed through several steps, according to the suggestions in the recent literature. Obtained values for each tibial slope were compared between gender subgroups using appropriate statistical tests. Results. Mean values of each component of the posterior tibial slope for male vs. female subgroups were as follows: MTS 3.7? ? 2.8? vs. 5.1? ? 2.9?, LTS 4.2? ? 2.8? vs. 4.3? ? 2.7?, and CTS 3.9? ? 2.4? vs. 3.3? ? 1.9? respectively. The medial tibial slope was significantly higher in females than in males (p = 0.005). The mean value of the coronal tibial slope was greater in males without statistically significant difference (p = 0.105). Conclusion. This study demonstrated significant difference in MTS of the tibial plateau between males and females, being higher in the female subgroup.

Three-Dimensional Computed Tomography Analysis of the Posterior Tibial Slope in 100 Knees

2017 ◽  
Vol 32 (10) ◽  
pp. 3176-3183 ◽  
Author(s):  
Jade Pei Yuik Ho ◽  
Azhar M. Merican ◽  
Muhammad Sufian Hashim ◽  
Azlina A. Abbas ◽  
Chee Ken Chan ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Tibial Slope ◽  
Posterior Tibial Slope ◽  
Posterior Tibial ◽  
Tomography Analysis

scholarly journals The relationship between posterior tibial slope and anterior cruciate ligament injury

2014 ◽  
Vol 67 (7-8) ◽  
pp. 216-221 ◽  
Author(s):  
Vladimir Ristic ◽  
Mirsad Maljanovic ◽  
Branislav Pericin ◽  
Vladimir Harhaji ◽  
Miroslav Milankov
Keyword(s):  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Tibial Slope ◽  
Anterior Cruciate Ligament Rupture ◽  
Posterior Tibial Slope ◽  
Posterior Tibial ◽  
Ligament Rupture ◽  
Cruciate Ligament Rupture ◽  
Significant Difference ◽  
Anterior Cruciate

Introduction. The aim of this study was to identify an increased posterior tibial slope as a possible risk factor for anterior cruciate ligament injury. Material and Methods. Sixty patients were divided into two groups (with and without anterior cruciate ligament rupture). The posterior tibial slope on the lateral and medial condyles was measured by sagittal magnetic resonance imaging slices by means of computerized method using circles to determine tibial axis. Results. The patients with anterior cruciate ligament rupture had a statistically significantly (p=0.06) greater posterior tibial slope on the lateral tibial condyle than the control group (6.68?:5.64?), and a greater slope on the medial condyle (5.49?:4.67?) in comparison to the patients with the intact anterior cruciate ligament. No significant difference in the average values of angles was observed between males and females with anterior cruciate ligament rupture, the average value being 6.23? in men and 5.84? in women on the lateral condyle, and 4.53? in men and 4.53? in women on the medial condyle. Discussion and Conclusion. A statistically significant difference between the values of posterior tibial slope was observed between the groups with and without anterior cruciate ligament rupture, the sex having no affect on the value of the posterior tibial slope. The method of measuring angles should be unique.

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.

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