Universität zu Köln

Hoffeld, Kai ORCID: 0000-0002-0742-0791, Hockmann, Jan P. ORCID: 0000-0002-6408-1415, Wahlers, Christopher ORCID: 0000-0001-8901-4780, Eysel, Peer ORCID: 0009-0004-6057-6092, Hackl, Michael ORCID: 0000-0002-6183-5621 and Oppermann, Johannes ORCID: 0000-0002-0742-7440 (2025). Construct stability in anterior open wedge osteotomy: Assessing 3D-printed polylactic acid wedges against cortical bone. Clinical Biomechanics, 125. pp. 1-7. Elsevier. ISSN 1879-1271

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Abstract

[Artikel-Nr.: 106509] Background: This in-vitro biomechanical study aimed to assess whether using a wedge as a gap filler in anterior open wedge osteotomy of the proximal tibia reduces load on the screw-plate construct and to evaluate if a 3D- printed polylactic acid wedge offers similar biomechanical stability like a bone wedge. Methods: Twenty-four cadaveric proximal tibiae were randomly assigned to one of three groups: TomoFix plate alone as control group, TomoFix plate with a bone wedge, and TomoFix plate with a 3D-printed polylactic acid wedge. The specimens were subjected to axial loads of 400 N, 800 N, and 1200 N for 1000 cycles. Compression depth and axial stiffness were measured to assess stability. Findings: There were no significant differences in overall compression depth or axial stiffness between the groups (p > 0.05). At 1200 N, hinge fractures occurred in 6 of 8 specimens in the control group, compared to 0 of 8 in the wedge groups. Both bone and polylactic acid wedges improved construct stability, with the polylactic acid wedge performing comparably to the bone wedge. Interpretation: Gap fillers, whether bone or polylactic acid wedges, may contribute construct stability in anterior open wedge osteotomy of the proximal tibia. The 3D-printed polylactic acid wedge may be biomechanically comparable to the bone wedge, suggesting its potential as an alternative in clinical applications.

Item Type:	Article
Creators:	Creators Email ORCID ORCID Put Code Hoffeld, Kai UNSPECIFIED https://orcid.org/0000-0002-0742-0791 UNSPECIFIED Hockmann, Jan P. UNSPECIFIED https://orcid.org/0000-0002-6408-1415 UNSPECIFIED Wahlers, Christopher UNSPECIFIED https://orcid.org/0000-0001-8901-4780 UNSPECIFIED Eysel, Peer UNSPECIFIED https://orcid.org/0009-0004-6057-6092 UNSPECIFIED Hackl, Michael UNSPECIFIED https://orcid.org/0000-0002-6183-5621 UNSPECIFIED Oppermann, Johannes UNSPECIFIED https://orcid.org/0000-0002-0742-7440 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-803341
Identification Number:	10.1016/j.clinbiomech.2025.106509
Journal or Publication Title:	Clinical Biomechanics
Volume:	125
Page Range:	pp. 1-7
Number of Pages:	11
Date:	May 2025
Publisher:	Elsevier
ISSN:	1879-1271
Language:	English
Faculty:	Faculty of Medicine
Divisions:	Faculty of Medicine > Orthopädie > Klinik und Poliklinik für Orthopädie und Unfallchirurgie
Subjects:	Medical sciences Medicine
Uncontrolled Keywords:	Keywords Language Anterior open wedge osteotomy ; Slope correction osteotomy ; Cortical bone wedge ; Biomechanical stability ; Tibial osteotomy ; Gap fillers English
['eprint_fieldname_oa_funders' not defined]:	Publikationsfonds UzK
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/80334