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© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Background: Surgical accuracy in total knee replacement (TKR) may vary with the surgeon, the patient preoperative deformity, and the guiding system to perform the procedure. Navigation systems attempt to increase the intraoperative information the surgeon requires to make the appropriate decisions, sometimes associating cumbersome procedures and unclear effectiveness to place the implant more precisely than conventional instruments. Methods: We conducted a retrospective case-control study with prospective data collection of radiographic measurements (alignment, joint line and patellar height) in a sample of 100 consecutive patients receiving TKR Optetrak Logic PS, either with standard surgical technique with Trulion Instrumentation (n = 59) or with the Guided Personalized Surgery (GPS) system (n = 41). Results: The GPS group improved the alignment of the mechanical Lateral Distal Femoral Angle (mLDFA) in 1.6° compared to the control (p = 0.003), but not evident in the mechanical Medial Proximal Tibial Angle (mMPTA) (p = 0.132). The GPS system achieved a normal patellar height in 98% of cases, according to the Blackburne–Peel Index (BP), compared to 71% in the control group (p = 0.002). This was obtained in the femoral side, as measured in the Epicondylar Ratio (ER) (p = 0.004). A lower dispersion of postoperative measurements was observed in the GPS group in comparison with the control, being statistically significant in mMPTA (p = 0.000), CD-Index (p = 0.011), IS-Index (p = 0.002), mIS-Index (p = 0.008), BP-Index (p = 0.011), and ER (p = 0.004). Conclusions: Better post-surgical restoration of joint line and patellar height is observed in surgeries performed with the GPS system, as well as a tendency to more accurate mechanical alignment and lower inter-patient variability, suggesting higher reproducibility.

Details

Title
Guided Personalized Surgery (GPS) in Posterostabilized Total Knee Replacement: A Radiological Study
Author
Ana de Andrés-Torán 1 ; Padilla-Eguiluz, Norma G 2   VIAFID ORCID Logo  ; Hernández-Esteban, Pablo 3 ; Gómez-Barrena, Enrique 1   VIAFID ORCID Logo 

 Servicio de Cirugía Ortopédica y Traumatología, Hospital La Paz-IdiPaz, 28046 Madrid, Spain; [email protected] (A.d.A.-T.); [email protected] (P.H.-E.); Departamento de Cirugía, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain; [email protected] 
 Departamento de Cirugía, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain; [email protected] 
 Servicio de Cirugía Ortopédica y Traumatología, Hospital La Paz-IdiPaz, 28046 Madrid, Spain; [email protected] (A.d.A.-T.); [email protected] (P.H.-E.) 
First page
429
Publication year
2025
Publication date
2025
Publisher
MDPI AG
e-ISSN
20770383
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3159456872
Copyright
© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.