Universität zu Köln

Thelen, Simon, Betsch, Marcel, Schneppendahl, Johannes, Grassmann, Jan, Hakimi, Mohssen, Eichler, Christian, Windolf, Joachim and Wild, Michael (2013). Fixation of Multifragmentary Patella Fractures Using a Bilateral Fixed-angle Plate. Orthopedics, 36 (11). S. E1437 - 7. THOROFARE: SLACK INC. ISSN 1938-2367

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Abstract

This biomechanical study is the first to compare 3 fixation methods-bilateral fixed-angle plate, modified anterior tension wiring, and cannulated lag screws with anterior tension wiring-in multifragmentary distal patella fractures. A T-shaped 3-part fracture simulating a multifragmentary articular distal patella fracture (AO/OTA 34-C2.2) was created in 18 human cadaver knee specimens. Three groups were created using homogenous ages and bone mineral densities based on the fixation method received. Repetitive testing over 100 cycles was performed by moving the knee against gravity from 90 degrees flexion to full extension. Failure was defined as fracture displacement greater than 2 mm. In all patellae using fixed-angle plates, an anatomical fracture reduction could be maintained throughout cyclic testing, whereas anterior tension wiring and lag screws with tension wiring showed significant fracture displacement after 100 cycles, with mean fracture gaps of 2.0+/-1.3 and 1.9+/-1.6 mm, respectively. The differences in fracture gaps between the fixed-angle plate group and the other 2 groups were statistically significant. In both groups using tension wiring, half of the constructs (3 of 6 in each group) failed due to a fracture displacement greater than 2 mm. The bilateral fixed-angle plate was the only fixation method that sustainably stabilized a multifragmentary articular distal patella fracture during cyclic loading when compared with modified anterior tension wiring and cannulated lag screws with anterior tension wiring.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Thelen, Simon UNSPECIFIED UNSPECIFIED UNSPECIFIED Betsch, Marcel UNSPECIFIED UNSPECIFIED UNSPECIFIED Schneppendahl, Johannes UNSPECIFIED UNSPECIFIED UNSPECIFIED Grassmann, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Hakimi, Mohssen UNSPECIFIED UNSPECIFIED UNSPECIFIED Eichler, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Windolf, Joachim UNSPECIFIED UNSPECIFIED UNSPECIFIED Wild, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-472768
DOI:	10.3928/01477447-20131021-29
Journal or Publication Title:	Orthopedics
Volume:	36
Number:	11
Page Range:	S. E1437 - 7
Date:	2013
Publisher:	SLACK INC
Place of Publication:	THOROFARE
ISSN:	1938-2367
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INTERNAL-FIXATION; BIOMECHANICAL EVALUATION; TRANSVERSE FRACTURES; OPEN REDUCTION; POLYESTER; JOINT; WIRE Multiple languages Orthopedics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47276