The prevalence of posterolateral tibial baseplate overhang: An anatomical CT study

Yokhana, Sanar S.; Hamilton, D. Alex; Stine, Sasha; Stimson, Lauren N.; Zalikha, Abdul K.; Chen, Chaoyang; Darwiche, Hussein F.

doi:10.1016/j.jor.2021.02.002

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…The overhang was measured on the femoral side by taking the length of the prosthesis and bone-implant bed on the horizontal line of the five plane turning points of the prosthesis, the midpoint of each plane, and the position of the inner and outer lateral edges of the upper edge of the prosthesis ( 25 ). Greater than 3 mm on the femoral side and 1.5 mm on the tibial side were defined as overhang, and vice versa as underhang ( 25 , 26 ). The specific measurement for 1, 3, and 6 months post operation results are shown in Supplementary Tables 5 – 10 .…”

Section: Resultsmentioning

confidence: 99%

“…On average, the femoral and tibial prostheses were slightly smaller than the osteotomy plane in the measurement direction, with an average overhang of 1.28 and 1.32 mm on the femoral and tibial sides, respectively. The tibial overhang generally occurs at the posterior corner of the tibial osteotomy surface, and the average overhang is 2.4 mm according to the ideal position ( 26 ). However, in this study, two patients had overhangs (2.72 and 4.04 mm), and the prosthesis was clearly outside of the osteotomy plane in the 3D model.…”

Section: Discussionmentioning

confidence: 99%

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Preliminary Study on Immediate Postoperative CT Images and Values of the Modular Polyetheretherketone Based Total Knee Arthroplasty: An Observational First-in-Human Trial

Cai

Zhao

et al. 2022

Front. Surg.

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BackgroundTotal knee arthroplasty (TKA) is now frequently performed and is highly successful. However, patient satisfaction after TKA is often difficult to achieve. Because of the presence of metallic prosthetic knee joints, there is a lack of imaging tools that can accurately assess the patient's postoperative prosthetic position, soft tissue impingement, and periprosthetic bone density after TKA. We conducted a clinical trial of the world's first totally modular polyetheretherketone (PEEK) TKA and determined the bone density values in the stress concentration area around the prosthesis based on postoperative computed tomography data to reconstruct a three-dimensional model of the PEEK prosthetic knee joint after implantation. Based on the model, the overhang of the prosthesis was measured at various locations on the prosthesis.MethodsAll patients who underwent PEEK-based TKA were postoperatively assessed with radiography and computed tomography (CT). Hounsfield units (HUs) for the different components of the quantitative CT assessment were measured separately.ResultsTen patients (nine female and one male) aged 59–74 (mean 66.9, median 67) years were included. The HU values were as follows: PEEK prosthesis mean 182.95, standard deviation (SD) 4.90, coefficient of variation (CV) 2.68; polyethylene mean −89.41, SD 4.14, CV −4.63; lateral femoral osteochondral mean 192.19, SD 55.05, CV 28.64; lateral tibial osteochondral mean 122.94, SD 62.14, CV 42.86; medial femoral osteophyte mean 180.76, SD 43.48, CV 24.05; and medial tibial osteophyte mean 282.59, SD 69.28, CV 24.52. Analysis of the data at 1, 3, and 6 months showed that the mean PE (p = 0.598) and PEEK (p = 0.916) measurements did not change with the time of measurement. There was a decrease in bone mineral density in the lateral tibia at 3 months (p = 0.044). Otherwise, there was no significant change in bone density in other regions (p = 0.124–0.803). There was no overhang in all femoral prostheses, whereas there were two cases of overhang in tibial prostheses. Overhang measurements do not differ significantly across time points. The overhang measurements were not significantly different at all time points (p = 0.186–0.967).ConclusionPEEK knee joint prosthesis has excellent CT compatibility. The change in periprosthetic bone volume during the follow-up period can be determined using the HU value after CT scan, while the prosthesis position can be assessed. This assessment may potentially guide future improvements in knee prosthesis alignment techniques and artificial knee prosthesis designs.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Preliminary Study on Immediate Postoperative CT Images and Values of the Modular Polyetheretherketone Based Total Knee Arthroplasty: An Observational First-in-Human Trial

Cai

Zhao

et al. 2022

Front. Surg.

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“…Fellows are also requested to initiate a project for the incoming fellow for the following year to ensured that all fellows participated in 2 research projects during their fellowship. Research curriculum included clinical studies [19][20][21][22][23] traditional biomechanical studies [24][25][26] and emerging machine learning Artificial Intelligence (AI) techniques in clinical translational research [27][28][29].…”

Section: Research Projectsmentioning

confidence: 99%

Evaluation of Educational Advancement following a Sports Medicine Rotation

Edward¹,

Allison²,

Patrick³

et al. 2021

Int J Sports Exerc Med

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Background:The competency in orthopaedic surgery and sports medicine has been reported as a deficiency. Sports medicine clinical rotations may improve both medical students' and residents' musculoskeletal knowledge, but none have evaluated the knowledge and skills a resident may gain during the rotation in sports medicine.Objective: The purpose of this study is to determine (1) The knowledge gained by residents at varying levels after rotating within our sports medicine program and (2) The performance of residents in a standardized sports medicine test at the start and end of each resident's rotation in sports medicine. Methods: Total of 136 residents and fellows participated in this study following the Model Curriculum and Guidelines for Orthopaedic Surgery Sports Medicine Fellowship Training created by the American Orthopaedic Society for Sports Medicine Accreditation Council of Graduate Medical Education. Multiple modalities training program were administered, including clinical rotation, laboratory research project, covering professional sport team training, and conference presentation. Their performances were assessed and compared by pre-and post-rotation tests with statistical analysis to determine the improvement of their orthopaedic knowledge. Results:The residents at the fifth of Post-Graduate-Year (PGY 5) scored the highest followed by fellows. PGY5 had the lowest percent change between pre-and post-test. PGY 2 and PGY3 residents scored the lowest overall while having the largest percent change before and after the rotation thereby showing the most improvement.Conclusions: Multiple modalities training program improved residents and fellows' performance and knowledge in sports medicine.

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Favorable outcomes of posterior cruciate-stabilized inserts over ultracongruent inserts in total knee arthroplasty

Obana

Wong

Shimoda

et al. 2023

Arch Orthop Trauma Surg

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The prevalence of posterolateral tibial baseplate overhang: An anatomical CT study

Cited by 5 publications

References 27 publications

Preliminary Study on Immediate Postoperative CT Images and Values of the Modular Polyetheretherketone Based Total Knee Arthroplasty: An Observational First-in-Human Trial

Preliminary Study on Immediate Postoperative CT Images and Values of the Modular Polyetheretherketone Based Total Knee Arthroplasty: An Observational First-in-Human Trial

Evaluation of Educational Advancement following a Sports Medicine Rotation

Favorable outcomes of posterior cruciate-stabilized inserts over ultracongruent inserts in total knee arthroplasty

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