Clinical and radiological analysis of a personalized total knee arthroplasty system design
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The objectives of this study were to determine the radiological outcome of a new personalized total knee arthroplasty (TKA) design and also to analyze the radiological reproducibility of the surgical technique.
Patients and methods
A total of 100 consecutive TKAs performed in 99 patients using Persona knee system were recruited. Weight-bearing standing anteroposterior and lateral radiographs were done in all the patients, both pre-operatively as well as post-operatively, and various radiological parameters were analyzed and compared.
The full correction of the limb mechanical axis was achieved in 97% of patients, and the radiological parameters of coronal and sagittal alignment of femoral and tibial components showed good results. There were no substantial differences between the mean pre-operative and post-operative patellar height indices, and data were in the normal range. Posterior condylar offset (PCO) and posterior condylar offset ratio (PCOR) had increased as expected after TKA. The coverage of tibia was optimal with data in the normal range.
Radiological assessment of the new personalized knee system design showed excellent results with various parameters restored to the normal values. Therefore, the prosthesis can be considered anatomic, and the surgical technique is reproducible allowing the prosthesis to be implanted easily and with high precision.
KeywordsTotal knee arthroplasty Radiological assessment New design
Compliance with ethical standards
Ethical Committee approval was obtained for this study.
Conflict of interest
The first author (FB) is part of the design team of the implant. The other authors (MG, SMPR, EP, VT, and SP) declare that they have no conflict of interest. The study is a spontaneous observational investigation carried out by the authors.
- 3.Dai Y, Scuderi GR, Bischoff JE, Bertin K, Tarabichi S, Rajgopal A (2014) Anatomic tibial component design can increase tibial coverage and rotational alignment accuracy: a comparison of six contemporary designs Knee Surg Sports Traumatol Arthrosc 22: 2911–2923. https://doi.org/10.1007/s00167-014-3282-0
- 4.Ghiara M, Combi A, Perticarini L, Rossi SMP, Benazzo F (2013) Patient reported outcome measures in the new persona total knee arthroplasty. J Orthopaed Traumatol 14(Suppl 1):S109–S110Google Scholar
- 5.Ghiara M, Combi A, Perticarini L, Rossi SMP, Benazzo F (2013) Short term follow-up in the new Persona total knee arthroplasty. J Orthopaed Traumatol 14(Suppl 1):S111Google Scholar
- 7.Ewald FC (1989) The Knee Society total knee arthroplasty roentgenographic evaluation and scoring system. Clin Orthop Relat Res 248:9–12Google Scholar
- 10.Yue RA, Arendt EA, Tompkins MA (2017) Patellar height measurements on radiograph and magnetic resonance imaging in patellar instability and control patients. J Knee Surg. https://doi.org/10.1055/s-0037-1599249
- 11.Bellemans J, Banks S, Victor J, Vandenneucker H, Moemans A (2002) Fluoroscopic analysis of the kinematics of deep flexion in total knee arthroplasty: influence of posterior condylar offset. J Bone Joint Surg Br 84-1:50–53Google Scholar
- 17.Figueroa J, Guarachi JP, Matas J, Arnander M, Orrego M (2016) Is computed tomography an accurate and reliable method for measuring total knee arthroplasty component rotation? Int Orthop 2016 Apr;40(4):709–714. doi: https://doi.org/10.1007/s00264-015-2917-1
- 18.Savin L, Botez P, Mihailescu D, Predescu V, Grierosu C (2016) Pre-operative radiological measurement of femoral rotation for prosthetic positioning in total knee arthroplasty. Int Orthop 2016 Sep;40(9):1855–1860. doi: https://doi.org/10.1007/s00264-015-3110-2
- 22.Carlson VR, Post ZD, Orozco FR, Davis DM, Lutz RW, Ong AC (2018) When does the knee feel normal again: a cross-sectional study assessing the forgotten joint score in patients after total knee arthroplasty. J Arthroplast 33(3):700–703. https://doi.org/10.1016/j.arth.2017.09.063 CrossRefGoogle Scholar