Identification of the joint line in revision total knee arthroplasty using a multiple linear regression model: a cadaveric study

Hou, Yunfei; Jiang, Jun; Liu, Han; Wang, Ke; Wu, Jingyu; Wang, Yixiong; Lin, Jianhao

doi:10.1007/s00402-023-04792-3

Cited by 2 publications

(2 citation statements)

References 34 publications

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“…We compared the ratios and error values between our data and those of other studies; the results were similar despite racial differences (Table 2). The ME-FJ/ML differed depending on whether the reference point of the ME was the prominence or the sulcus [19][20][21][22][23][24][25][26]. Servien et al recommended JL determination by using the ratio of the distance from the ME and LE to the transepicondylar width [26].…”

Section: Discussionmentioning

confidence: 99%

“…In addition, prominence was used as a landmark, which was easy to identify on CT images and during surgery. Several reports suggest that AT is a more accurate intraoperative indicator of the distal JL than the epicondyle [ 21 , 22 ]; however, an advantage of our method is that it allows for preoperative estimation of both distal and posterior JLs. The distance from the LE to the distal and posterior JLs was approximately 21 mm, whereas that from the ME to the distal JL and from the ME to the posterior JL was 25.2 and 29.4 mm, respectively.…”

Section: Discussionmentioning

confidence: 99%

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Prediction of Distal Femoral and Posterior Articular Surfaces in Total Knee Arthroplasty With Severe Bone Defects Using Computed Tomography-Based Templating Software

Hirakawa,

Miyazaki,

Sato

et al. 2024

Cureus

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IntroductionOptimal repair of the joint line (JL) in total knee arthroplasty (TKA) is critical for knee joint motion reconstruction and ligament balance. Identification of JL may be difficult, particularly in revision or primary cases of severe femoral condylar bone loss. We aimed to define the relationship between the epicondyles and the articular surface (AS) of the femur using computed tomography-based three-dimensional digital templating software. MethodsThe study included 127 knees with osteoarthritis of the knee below grade 2 on the Kellgren-Lawrence index. A perpendicular line was drawn from the medial and lateral femoral epicondylar processes to the most distal point of the AS, and the distance was measured in the axial and coronal planes. Femoral width was measured as the distance between the medial and lateral epicondyles. All distances described above were converted to a ratio by division with femoral width. ResultsOn the axial plane, the distance from epicondyles to the posterior ASs was 29.4 ± 2.2 mm medially and 21.3 ± 2.1 mm laterally. The width of the distal femur was 75.2 ± 4.2 mm. On the coronal plane, the distances from epicondyles to the distal ASs were 25.2 ± 2.9 mm on the medial side and 21.3 ± 2.5 mm on the lateral side. The ratio of the distance from epicondyles to the distal and posterior ASs divided by the width of the femur was 0.39 ± 0.02, 0.28 ± 0.03, 0.34 ± 0.03, and 0.28 ± 0.03. ConclusionsThe distance from the epicondyles to the distal and posterior JLs correlates with the distal femur width. These findings may be useful in determining an appropriate JL.

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