25dkou217
10.3205/25dkou217
urn:nbn:de:0183-25dkou2173
Meeting Abstract
3-dimensional analysis of total knee replacement fit prior to implantation: Identifying limitations of conventional implant systems
Lou
Lou
Chao
C
AGAPLESION EV. KLINIKUM SCHAUMBURG, Obernkirchen, Deutschland
author
Theiss
Theiss
Lennart
L
AGAPLESION EV. KLINIKUM SCHAUMBURG, Obernkirchen, Deutschland
author
Jagodzinski
Jagodzinski
Michael
M
AGAPLESION EV. KLINIKUM SCHAUMBURG, Obernkirchen, Deutschland
author
Huang
Huang
Yong
Y
AGAPLESION EV. KLINIKUM SCHAUMBURG, Obernkirchen, Deutschland
author
German Medical Science GMS Publishing House
Düsseldorf
610
20251031
engl
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License.
Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung).
M0634
217
Deutsche Gesellschaft für Orthopädie und Unfallchirurgie
Deutsche Gesellschaft für Orthopädie und Orthopädische Chirurgie
Deutsche Gesellschaft für Unfallchirurgie
Berufsverband für Orthopädie und Unfallchirurgie
Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2025)
Poster | Freie Themen 1
Berlin
20251028
20251031
AB30-4494
TextObjectives and questions: This study aimed to evaluate the impact of patient-specific anatomical characteristics and implant size on endoprosthesis fit in total knee arthroplasty (TKA), and establish a preoperative protocol integrating 3D anatomical assessment and fit simulations to optimize prosthesis selection for improved fit to the bone surface, potentially enhancing functional outcomes and patient satisfaction.Material and methods: Virtual implantation of three commercially available off-the-shelf TKA prostheses (DePuy Synthes, Stryker, Zimmer Biomet) was simulated in 92 patients who earlier received custom-designed implants. Fit accuracy was quantified in sagittal, coronal, and axial planes using newly defined measurement parameters.Results: The mean deviation from optimal fit across all prostheses was 3.05±0.17 mm (p<0.01), with significant inter-brand differences (p=0.001): DePuy implants exhibited the largest deviations (3.13±0.19 mm), followed by Stryker (3.06±0.17 mm) and Zimmer (2.95±0.16 mm). Deviations varied significantly (p<0.05) across anatomical subregions and measurement planes.Discussion and conclusions: Conventional TKA systems demonstrated clinically relevant fit deviations (>3 mm) across newly defined anatomical subregions, with implant size and patient-specific anatomy being key determinants. These findings underscore the need for preoperative 3D assessment protocols to guide prosthesis selection based on individual morphological characteristics.
0
0
0
0