Mechanical Comparison of Two Types of Fixation for Ludloff Oblique First Metatarsal Osteotomy

Tsilikas, SP; Stamatis, ED; Kourkoulis, SK; Mitousoudis, AS; Chatzistergos, PE; Papagelopoulos, PJ

dc.contributor.author	Tsilikas, SP	en
dc.contributor.author	Stamatis, ED	en
dc.contributor.author	Kourkoulis, SK	en
dc.contributor.author	Mitousoudis, AS	en
dc.contributor.author	Chatzistergos, PE	en
dc.contributor.author	Papagelopoulos, PJ	en
dc.date.accessioned	2014-03-01T01:36:05Z
dc.date.available	2014-03-01T01:36:05Z
dc.date.issued	2011	en
dc.identifier.issn	1067-2516	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21272
dc.subject	Bone	en
dc.subject	Hallux valgus	en
dc.subject	Interfragmental compression screw	en
dc.subject	Locking plate	en
dc.subject	Surgery	en
dc.subject.other	article	en
dc.subject.other	biomechanics	en
dc.subject.other	bone plate	en
dc.subject.other	bone screw	en
dc.subject.other	controlled study	en
dc.subject.other	energy absorption	en
dc.subject.other	fracture fixation	en
dc.subject.other	interfragmental compression screw	en
dc.subject.other	intermethod comparison	en
dc.subject.other	load to failure	en
dc.subject.other	Ludloff oblique first metatarsal osteotomy	en
dc.subject.other	metatarsal osteotomy	en
dc.subject.other	mini locking plate	en
dc.subject.other	physical parameters	en
dc.subject.other	plate fixation	en
dc.subject.other	rigidity	en
dc.subject.other	screw fixation	en
dc.subject.other	Biomechanics	en
dc.subject.other	Bone Plates	en
dc.subject.other	Bone Screws	en
dc.subject.other	Hallux Valgus	en
dc.subject.other	Humans	en
dc.subject.other	Internal Fixators	en
dc.subject.other	Metatarsal Bones	en
dc.subject.other	Models, Anatomic	en
dc.subject.other	Osteotomy	en
dc.subject.other	Sensitivity and Specificity	en
dc.subject.other	Stress, Mechanical	en
dc.title	Mechanical Comparison of Two Types of Fixation for Ludloff Oblique First Metatarsal Osteotomy	en
heal.type	journalArticle	en
heal.identifier.primary	10.1053/j.jfas.2011.06.006	en
heal.identifier.secondary	http://dx.doi.org/10.1053/j.jfas.2011.06.006	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	The Ludloff oblique metatarsal osteotomy is an effective method to correct hallux valgus deformity, although a number of problems have been associated with it, including inherent instability, delayed union, dorsal malunion, and fixation failure. The purpose of the present study was to compare the mechanical characteristics of fixation of the Ludloff osteotomy in 20 identical synthetic bone models, 10 fixated using 2 screws (group I) and 10 fixated using 2 screws augmented with a mini locking plate (group II). Each specimen was loaded to failure, and the mean average load to failure, stiffness, and absorbed energy to failure were compared using unpaired Student's t test. The mean average stiffness of the Ludloff osteotomy fixed with 2 screws (group I) and with the supplementary mini locking plate (group II) was 172.7 +/- 31.7 N/mm and 193.3 +/- 39 N/mm, respectively (p = .21). The mean average load to failure for groups I and II was 278.4 +/- 64.4 N and 356.2 +/- 77.9 N, respectively (p = .025). The mean average energy absorbed before failure for groups I and II was 506.7 +/- 206.4 Nmm and 769.8 +/- 339.4 Nmm, respectively (p = .05). The use of a medially applied supplementary mini locking plate offers a simple and effective method to improve the mechanical stability of the Ludloff oblique osteotomy. (C) 2011 by the American College of Foot and Ankle Surgeons. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE INC	en
heal.journalName	Journal of Foot and Ankle Surgery	en
dc.identifier.doi	10.1053/j.jfas.2011.06.006	en
dc.identifier.isi	ISI:000296538900013	en
dc.identifier.volume	50	en
dc.identifier.issue	6	en
dc.identifier.spage	699	en
dc.identifier.epage	702	en