In vitro mechanical evaluation of torsional loading in simulated canine tibiae for a novel hourglass-shaped interlocking nail with a self-tapping tapered locking design

被引:42
作者
Déjardin, LM
Lansdowne, JL
Sinnott, MT
Sidebotham, CG
机构
[1] Michigan State Univ, Coll Vet Med, Dept Small Anim Clin Sci, E Lansing, MI 48824 USA
[2] Michigan State Univ, Coll Osteopath Med, Orthopaed Biomech Labs, E Lansing, MI 48824 USA
[3] BioMedtrix, Boonton, NJ 07005 USA
关键词
D O I
10.2460/ajvr.67.4.678
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Objective-To describe a novel interlocking nail (ILN) and locking system and compare the torsional properties of constructs implanted with the novel ILN or a standard 8-mm ILN (ILN8) by use of a gap-fracture model. Sample Population-8 synthetic specimens modeled from canine tibiae. Procedures-An hourglass-shaped ILN featuring a tapered locking mechanism was designed. A synthetic bone model was custom-made to represent canine tibiae with a 50-mm comminuted diaphyseal fracture. Specimens were repaired by use of a novel ILN or an ILN8 with screws. Specimens were loaded for torsional measurements. Construct compliance and angular deformation were compared. Results-Compliance of the ILN8 was significantly smaller than that of the novel ILN. Mean SID maximum angular deformation of the ILN8 construct (23.12 +/- 0.65 degrees) was significantly greater, compared with that of the novel ILN construct (9.45 +/- 0.22 degrees). Mean construct slack for the ILN8 group was 15.15 +/- 0.63 degrees, whereas no slack was detected for the novel ILN construct. Mean angular deformation for the ILN8 construct once slack was overcome was significantly less, compared with that of the novel ILN construct. Conclusions and Clinical Relevance-Analysis of results of this study suggests that engineering of the locking mechanism enabled the novel hourglass-shaped ILN system to eliminate torsional instability associated with the use of current ILNs. Considering the potential deleterious effect of torsional deformation on bone healing, the novel ILN may represent a biomechanically more effective fixation method, compared with current ILNs, for the treatment of comminuted diaphyseal fractures.
引用
收藏
页码:678 / 685
页数:8
相关论文
共 53 条
[1]  
An Y.H., 2000, MECH TESTING BONE BO, V1, P23
[2]  
AN YH, 2000, MECH TESTING BONE BO, P41
[3]   Effect of bone diameter and eccentric loading on fatigue life of cortical screws used with interlocking nails [J].
Aper, RL ;
Litsky, AS ;
Roe, SC ;
Johnson, KA .
AMERICAN JOURNAL OF VETERINARY RESEARCH, 2003, 64 (05) :569-573
[4]  
Aro H T, 1991, J Orthop Trauma, V5, P351, DOI 10.1097/00005131-199109000-00016
[5]   Shear movement at the fracture site delays healing in a diaphyseal fracture model [J].
Augat, P ;
Burger, J ;
Schorlemmer, S ;
Henke, T ;
Peraus, M ;
Claes, L .
JOURNAL OF ORTHOPAEDIC RESEARCH, 2003, 21 (06) :1011-1017
[6]   Two techniques for supplementing interlocking nail repair of fractures of the humerus, femur, and tibia: Results in 12 dogs and cats [J].
Basinger, RR ;
Suber, JT .
VETERINARY SURGERY, 2004, 33 (06) :673-680
[7]  
CARTER DR, 1978, CLIN ORTHOP RELAT R, V135, P192
[8]   The effect of mechanical stability on local vascularization and tissue differentiation in callus healing [J].
Claes, L ;
Eckert-Hübner, K ;
Augat, P .
JOURNAL OF ORTHOPAEDIC RESEARCH, 2002, 20 (05) :1099-1105
[9]  
Claes LE, 1998, CLIN ORTHOP RELAT R, pS132
[10]   Magnitudes of local stress and strain along bony surfaces predict the course and type of fracture healing [J].
Claes, LE ;
Heigele, CA .
JOURNAL OF BIOMECHANICS, 1999, 32 (03) :255-266