Computer‐Assisted Surgery for Screw Insertion into the Distal Sesamoid Bone in Horses: An In Vitro Study

Abstract

The CAS technique should be considered for improved accuracy of screw insertion in fractures of the distal sesamoid bone.

Introduction of 3.5mm and 4.5mm cortex screws into the equine distal sesamoid bone with the help of the VetGate Computer Assisted Surgery Systems and comparison of the results with the previously reported ones, acquired with the SurgiGATE 1.0 System – an in vitro study

“…Statistically there was no significant difference between axis angles of the 3.5 mm and 4.5 mm screws (p = 0.07), entry-(p = 0.7299) nor exit point (p = 0.0932). The absolute aberrance from this length to the screws tips protruding and being still located within the bone 1.77 mm (range -5.8 to 3.6 mm) ( Table 2).The results of this study with the 3.5 mm screws, compared to the 3.5 mm CAS screws of Gygax et al (2006), are significantly better (p = 0.023) (Tab. 3).…”

“…The SurgiGATE 1.0 worked with an active Introduction of 3.5 mm and 4.5 mm cortex screws into the equine distal sesamoid bone with the help the VetGate System C. S. Schwarz et al Pferdeheilkunde 33 (2017) 224 optic tracking system, where the instruments were tracked with infrared light emitting diodes. The drill sleeve was not navigated in this system (Andritzky et al 2005, Gygax et al 2006, Rossol et al 2008). This system is not available anymore and the remaining one is not professionally serviced any more.…”

“…To compare the axis angles, entry and exit point of the 3.5 and 4.5 mm screws, the Student t-test was used. To compare the outcome of this study with the one of Gygax et al (2006) and to compare the outcome of 3.5 mm versus 4.5 mm screws, the Fisher's exact chi-test was used. For all analyses, a P value < 0.05 was considered significant.…”

“…Computer Assisted Surgery (CAS) has been reported to increase surgical precision (Laine et al 2000, Bathis et al, 2004, Sikorski and Blythe 2005. However, the system used by Gygax et al (2006) had several shortcomings that had to be solved (a large number of cables near the surgical field, which jeopardized aseptic technique; no data reference base attached to the drill sleeve, which reduced precision of drilling).…”

Le traitement chirurgical des fractures du doigt chez le cheval, assisté par le scanner

“…Cette première phase (Scott et al 1979 ;Honnas 1 992 ;Keegan et al 1993 ;Rijkenhuizen 2004 ;Ohlsson et al 2005 ; La chirurgie des fractures de l'os naviculaire est difficile du fait de la taille de cet os et de l'existence de la boite cornée qui l'entoure, ne permettant pas son abord direct. Les techniques décrites dans la littérature sont basées sur des repérages radiographiques de très haute qualité, avec des systèmes de visée plus ou moins sophistiquées pour assurer le forage (Nemeth et al 1985;Baxter et al 1995;Lillich et al 1995;Colles 2001;Gygax et al 2006 ;Smith et al 2008 Jusqu'à ce jour, il a été décrit la possibilité de réaliser un scanner avant l'intervention (Mac Donald et al 2009), ce qui permet de mettre en place une stratégie chirurgicale pour la pose correcte d'implants. À notre connaissance il n'a pas été décrit la possibilité d'utiliser le scanner pendant l'intervention avec les champs stériles en place comme c'est le cas lors de l'emploi de la radiographie et de l'amplification de brillance.…”