Autoren:	Hopf, Johannes Christof Mehler, Dorothea Nowak, Tobias Eckhard Gruszka, Dominik Wagner, Daniel Rommens, Pol Maria
Titel:	Nailing of diaphyseal ulna fractures in adults : biomechanical evaluation of a novel implant in comparison with locked plating
Online-Publikationsdatum:	26-Okt-2020
Erscheinungsdatum:	2020
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	Abstract Background: Adult forearm fractures require surgical treatment in most cases. Open reduction and internal fixation with plate osteosynthesis is the therapy of choice. Intramedullary fixation offers several advantages compared to plate fixation but is not routinely used. The aim of our study was to compare a newly designed ulna nail with angular stable plating in a biomechanical testing setup of an ulna shaft fracture with a diaphyseal defect. Methods: Ten pairs of sawbones with a defect osteotomy of the ulna shaft (OTA 2U2C3) were fixed with an interlocked nail or locked plate osteosynthesis. The constructs were tested under four-point bending, torsional loading and axial loading in a servo-pneumatic testing machine to compare the stiffness of both stabilization methods. Results: The nail constructs show lower yet sufficient bending stiffness (62.25 ± 6.64 N/mm) compared to the plate constructs (71.2 ± 5.98 N/mm, p = 0.005). The torsional loading test shows superior stiffness of the plate constructs (0.24 ± 0.03 Nm/deg vs. 0.1 ± 0.01 Nm/deg; p < 0.001), while the axial loading shows superior stiffness of the nail constructs (1028.9 ± 402.1 N/mm vs. 343.9 ± 112.6 N/mm; p < 0.001). Conclusions: Intramedullary nailing of ulna shaft fractures obtains sufficient but lower stability in bending and torsional loading when compared to rigid angular stable plating and could be an alternative technique to plate fixation. The lower stability and the closed stabilization technique allow for a rapid periosteal healing, which is not present in stiffer constructs. Keywords: Nailing, Ulna shaft, Biomechanical study
DDC-Sachgruppe:	610 Medizin 610 Medical sciences
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 04 Medizin
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-5227
Version:	Published version
Publikationstyp:	Zeitschriftenaufsatz
Nutzungsrechte:	CC BY
Informationen zu den Nutzungsrechten:	https://creativecommons.org/licenses/by/4.0/
Zeitschrift:	Journal of orthopaedic surgery and research 15
Seitenzahl oder Artikelnummer:	Art. 158
Verlag:	Biomed Central
Verlagsort:	London
Erscheinungsdatum:	2020
ISSN:	1749-799X
URL der Originalveröffentlichung:	https://doi.org/10.1186/s13018-020-01656-z
DOI der Originalveröffentlichung:	10.1186/s13018-020-01656-z
Enthalten in den Sammlungen:	JGU-Publikationen