We have studied the biomechanical stability in vitro of three different Kirschner (K) wire configurations in three types of simulated scaphoid waist fractures. The fractures were created with a saw in Sawbones models. There were three fracture patterns: perpendicular to the long axis of the scaphoid model; and 30° and 20° oblique to that. Two 1.2 mm. K-wires were used in each scaphoid. The three configurations were: parallel; 20° oblique; and crossing. The oblique or crossing configurations of K-wires were the most stable depending on the fracture pattern.
Bohler L, Trojan E, Jahna H. The results of treatment of 734 fresh, simple fractures of the scaphoid. J Hand Surg Br. 2003, 28: 319–31.
2.
Chan KW,McAdams TR.Central screw placement in percutaneous screw scaphoid fixation: a cadaveric comparison of proximal and distal techniques.J Hand Surg Am. 2004;29:74-9
Ezquerro F,Jimenez S,Perez A,Prado M,deDiego G,Simon A.The influence of wire positioning upon the initial stability of scaphoid fractures fixed using K-wires.A finite element study. Med Eng Phys. 2007;29:652-60
5.
Gunal I,Barton N,Calli ICurrent management of scaphoid fractures. Twenty questions answered. London: Royal Society of Medicine Press; 2002:51-51.
6.
Hausmann JT,Mayr W,Unger E,Benesch T,Vecsei V,Gabler C.Interfragmentary compression forces of scaphoid screws in a sawbone cylinder model.Injury. 2007;38:763-8
7.
Marshall PD,Evans PD,Richards J.Laboratory comparison of the cannulated Herbert bone screw with ASSIF cancellous lag screws.J Bone Joint Surg Br. 1993;75:89-92
8.
Panchal A,Kubiak EN,Keshner M,Fulkerson E,Paksima N.Comparison of fixation methods for scaphoid nonunions: a biomechanical model.Eklem Hastalik Cerahisi. 2007;18:66-71
9.
Rankin G,Kuschner SH,Orlando C,McKellog H,Brien WW,Sherman R.A biomechanical evaluation of a cannulated compressive screw for use in fractures of the scaphoid.J Hand Surg Am. 1992;17:777-9
10.
Schüller M,Weninger P,Tschegg E,Jamek M,Redl H,Stanzl-Tschegg S.Micromotion at the fracture site after tibial nailing with four unreamed small-diameter nails.A biomechanical study using a distal tibia fracture model. J Trauma. 2009;66:1391-7
11.
Seber S,Gokdemir H,Ozcelik A,Gunal I,Aydin R,Kose N.A two-dimensional wrist model for carpal instability and force transmission.Eklem Hastalik Cerahisi. 2008;19:127-32
12.
Shaw JA.A biomechanical comparison of scaphoid screws.J Hand Surg Am. 1987;12:347-53
13.
Sukul K,Johannes EJ,Marty RK.Biomechanical measurements on scaphoid bone screws in an experimental model.J Biomech. 1990;23:1115-21
