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

Schwarz, Cornelia S; Rudolph, Tobias; Kowal, Jens; Auer, Joerg A.

doi:10.21836/pem20170302

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…In this study, the two cases in which 4.5 mm screws were successfully inserted were also the distal sesamoid bones with the greatest width between the articular and flexor surface (>19 mm on midline). 6 As intra-operative imaging techniques continue to develop, confidence in accurately placing a lag screw may become increasingly possible. Further advancements in intra-operative imaging, such as 3D imaging or printing modalities currently in development, may increase surgeon confidence in selecting the larger screw size.…”

Section: Discussionmentioning

confidence: 99%

“…Various intra-operative imaging modalities used to guide screw placement include digital radiographs, fluoroscopy and computed tomography. 2,[4][5][6][7] With lag screw fixation using intra-operative radiology, one retrospective documented a 72% return to soundness within a population of 40 treated cases. 2 A recent case series reported a successful outcome in three cases using computed tomography.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Stiffness of an Equine Distal Sesamoid Bone Fracture Model Stabilized with 3.5-mm versus 4.5-mm Cortical Bone Screws in Lag Fashion

Mampe

Tatarniuk

Suarez-Fuentes³

et al. 2019

Vet Comp Orthop Traumatol

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Objective The aim of this study was to to determine the comparative stiffness following repair of an axial sagittal fracture model in equine distal sesamoid bones using either a single 3.5-mm or 4.5-mm cortical bone screw placed in lag fashion. Study Design The present study was an in vitro biomechanical study. Results The mean (±standard deviation) stiffness value for the 4.5-mm screw–bone construct (522.49 N/mm ± 168.21) was significantly greater than the 3.5-mm screw-bone construct (408.46 N/mm ± 131.13) (p = 0.047). This represents a 28% difference in mean stiffness. Conclusions In vitro, the 4.5-mm screw–bone construct creates a stiffer repair of fractured distal sesamoid bones by a margin of 28%. The 4.5-mm cortical bone screw may better withstand forces imparted on the distal sesamoid bone sustained during anaesthetic recovery, normal weight bearing and athletic exercise, thereby minimizing the risk of implant failure.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative Stiffness of an Equine Distal Sesamoid Bone Fracture Model Stabilized with 3.5-mm versus 4.5-mm Cortical Bone Screws in Lag Fashion

Mampe

Tatarniuk

Suarez-Fuentes³

et al. 2019

Vet Comp Orthop Traumatol

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“…Computer‐assisted orthopedic surgery (CAOS) considerably enhances the precision of screw insertion compared with conventional intraoperative 2D and 3D image‐guided techniques with or without the additional help of aiming devices 1‐3,10,11 . The required equipment for CAOS is becoming increasingly available in veterinary referral centers and is used for surgical interventions that demand extreme precision such as total knee replacements 12 in dogs and cortex screw placement for the repair of distal phalangeal 1,3,13,14 and sesamoid bone 2,15 fractures in horses.…”

Section: Introductionmentioning

confidence: 99%

Influence of a purpose‐built frame on the accuracy of computer‐assisted orthopedic surgery of equine extremities

2020

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Objective: To determine the influence of a purpose-built frame on the accuracy of screw placement during computer-assisted orthopedic surgery (CAOS) of the equine extremity. Study design: Experimental cadaveric study. Sample population: Twenty-four paired equine cadaveric limbs obtained from seven horses. Methods: Three 4.5-mm cortex screws were inserted in lag technique in three different planes of orientation in the proximal phalanx (P1) by means of CAOS. In the study group (n = 12 limbs), the tracker was anchored on a purpose-built frame designed to stabilize the extremity. In the control group (n = 12 limbs), a conventional tracker array was used that was anchored directly on P1. The stability of both tracker arrays was assessed during the procedure by using fiducial markers. After screw placement, preoperative and postoperative computed tomographic images were assessed to measure surgical accuracy aberrations (SAA) between the planned and achieved screw position. Descriptive statistics and repeated-measures analysis of variance were performed to compare SAA measurements between the study and control group. Results: Both tracker arrays remained consistently stable in all specimens. Mean overall SAA of screw insertion were lower in the study group (0.7 mm; median, 0.5; range 0-3.4) than in the control group (1.2 mm; median, 0.9; range, 0-4.2 mm). Conclusion: The mean SAA achieved in cortex screw placement using CAOS lies within the range of approximately 1 mm. The use of a purpose-built frame avoided additional drilling of the target bone and improved surgical accuracy compared with the conventional tracker array. Clinical significance: The purpose-built frame described in this report can be used to facilitate CAOS in equine orthopedics without compromising surgical accuracy. 1 | INTRODUCTION Numerous indications in equine orthopedic surgery demand the highest possible precision in cortex screw placement, leaving little room for error. Preoperative and intraoperative three-dimensional (3D) image guidance help increase the accuracy of cortex screw placement and set new standards in precision. 1-6 In addition, aiming

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Fractures of the Navicular Bone

Smith

2022

Fractures in the Horse

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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

Cited by 6 publications

References 6 publications

Comparative Stiffness of an Equine Distal Sesamoid Bone Fracture Model Stabilized with 3.5-mm versus 4.5-mm Cortical Bone Screws in Lag Fashion

Comparative Stiffness of an Equine Distal Sesamoid Bone Fracture Model Stabilized with 3.5-mm versus 4.5-mm Cortical Bone Screws in Lag Fashion

Influence of a purpose‐built frame on the accuracy of computer‐assisted orthopedic surgery of equine extremities

Fractures of the Navicular Bone

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