Biomechanical evaluation of two minimal access interbody cage designs in a cadaveric model

Background: Lisfranc joint injuries can be due to direct or indirect trauma and while the precise mechanisms are unknown, twisting or axial force through the foot is a suspected contributor. Cadaveric models are a useful way to evaluate injury patterns and models of fixation, but a frequent limitation is the amount of joint displacement after injury. The purpose of this study was to test a cadaveric model that includes axial load, foot plantarflexion and pronation-supination motion, which could re-create bone diastasis similar to what is seen in subtle Lisfranc injuries. Our hypothesis was that applying pronation and supination motion to a cadaveric model would produce reliable and measurable bone displacements. Methods: Twenty-four fresh-frozen lower leg cadaveric specimens were used. The medial (C1) and intermediate (C2) cuneiforms and the first (M1) and second (M2) metatarsal bones were marked. A complete ligament injury was performed between C1-C2 and C1-M2 in 12 specimens (group 1), and between C1-C2, C1-M2, C1-M1, and C2-M2 in 12 matched specimens (group 2). Foot pronation and supination in addition to an axial load of 400 N was applied to the specimens. A 3D digitizer was used to measure bone distances. Results: After ligament injury, distances changed as follows: C1-C2 increased 3 mm (23%) with supination; C1-M2 increased 4 mm (21%) with pronation (no differences between groups). As expected, distances between C1-M1 and C2-M2 only changed in group 2, increasing 3 mm (14%) and 2 mm (16%), respectively (no differences between pronation and supination). M1-M2 and C2-M1 distances did not reach significant difference for any condition. Conclusions: Pronation or supination in addition to axial load produced measurable bone displacements in a cadaveric model of Lisfranc injury using sectioned ligaments. Distances M1-M2 and C2-M1 were not reliable to detect injury in this model. Clinical Relevance: This new cadaveric Lisfranc model included foot pronation-supination in addition to axial load delivering measurable bone diastasis. It was a reliable Lisfranc cadaveric model that could be used to test different Lisfranc reconstructions.

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Biomechanical evaluation of hydroxyapatite intervertebral graft and anterior cervical plating in a porcine cadaveric model

Bio-Medical Materials and Engineering ◽

10.3233/bme-1997-7204 ◽

1997 ◽

Vol 7 (2) ◽

pp. 121-127

Author(s):

Toshiyuki Takahashi ◽

Teiji Tominaga ◽

Takashi Yoshimoto ◽

Keiji Koshu ◽

A. Toshimitsu Yokobori, Jr ◽

...

Keyword(s):

Biomechanical Evaluation ◽

Cervical Plating ◽

Cadaveric Model

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Biomechanical evaluation of a new fixation technique for internal fixation of three-part proximal humerus fractures in a novel cadaveric model

Yearbook of Hand and Upper Limb Surgery ◽

10.1016/j.yhls.2011.05.003 ◽

2011 ◽

Vol 2011 ◽

pp. 215-216

Author(s):

J. Jacobson

Keyword(s):

Internal Fixation ◽

Proximal Humerus ◽

Proximal Humerus Fractures ◽

Fixation Technique ◽

Biomechanical Evaluation ◽

Humerus Fractures ◽

Cadaveric Model

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Usability assessment of Versius, a new robot-assisted surgical device for use in minimal access surgery

BMJ Surgery, Interventions, & Health Technologies ◽

10.1136/bmjsit-2019-000028 ◽

2020 ◽

Vol 2 (1) ◽

pp. e000028 ◽

Cited By ~ 1

Author(s):

Fiona Haig ◽

Ana Cristina Barbosa Medeiros ◽

Karen Chitty ◽

Mark Slack

Keyword(s):

Minimal Access Surgery ◽

Minimal Access ◽

Usability Assessment ◽

Surgical Device ◽

Critical Task ◽

Surgical Teams ◽

Robotic Surgeries ◽

Access Surgery ◽

Upper Gastrointestinal ◽

Cadaveric Model

ObjectivesVersius is a teleoperated surgical robotic system intended for use in minimal access surgery. This study aimed to validate the safety and effectiveness of the Versius user interface in the hands of trained users and identify and address the causes of any user errors.DesignSurgical teams completed a commercially representative training program over 3.5 days. After training was completed, the usability-related aspects of the system were assessed.SettingA simulated operating room using a cadaveric model.ParticipantsSurgical teams consisting of a lead surgeon, assistant surgeon, scrub nurse and circulating nurse.Main outcome measuresUsability-related aspects of the system were assessed through the completion of critical and non-critical tasks. A critical task was defined according to the Food and Drug Administration’s definition, as a user task which, if performed incorrectly or not performed at all, would or could cause serious harm to the patient or user, where harm is defined to include compromised medical care.ResultsIn total, 17 surgical teams participated in the study and all were experienced in laparoscopic surgery. The number of robotic surgeries performed by the participants per month ranged from 0 to 100. Surgical specialties were similarly represented from obstetrics and gynecology, colorectal, urology and upper gastrointestinal. No critical task failures were observed. Of all the tasks completed, 98% were recorded as a pass or a pass with difficulty.ConclusionsThese results demonstrate that in a simulated clinical setting, Versius can be safely used by both laparoscopically and robotically trained healthcare professionals. These results support the progression to assessment of Versius in preclinical studies.

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Biomechanical Evaluation of Cervical Spinal Stabilization Methods in a Human Cadaveric Model

Spine ◽

10.1097/00007632-198910000-00016 ◽

1989 ◽

Vol 14 (10) ◽

pp. 1122-1131 ◽

Cited By ~ 173

Author(s):

JEFFREY D. COE ◽

KAREN E. WARDEN ◽

M Biomech ◽

CHESTER E. SUTTERLIN ◽

PAUL C. McAFEE

Keyword(s):

Spinal Stabilization ◽

Stabilization Methods ◽

Biomechanical Evaluation ◽

Cadaveric Model

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Biomechanical Evaluation of a Novel Autogenous Bone Interbody Fusion Cage for Posterior Lumbar Interbody Fusion in a Cadaveric Model

Spine ◽

10.1097/brs.0000000000000291 ◽

2014 ◽

Vol 39 (11) ◽

pp. E684-E692 ◽

Cited By ~ 3

Author(s):

Le Wang ◽

Kyle T. Malone ◽

Hai Huang ◽

Zhenshan Zhang ◽

Zhi Zhang ◽

...

Keyword(s):

Interbody Fusion ◽

Posterior Lumbar Interbody Fusion ◽

Autogenous Bone ◽

Lumbar Interbody Fusion ◽

Biomechanical Evaluation ◽

Fusion Cage ◽

Cadaveric Model ◽

Interbody Fusion Cage

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Biomechanical evaluation of Caspar and Cervical Spine Locking Plate systems in a cadaveric model

Journal of Neurosurgery ◽

10.3171/jns.1996.84.6.1039 ◽

1996 ◽

Vol 84 (6) ◽

pp. 1039-1045 ◽

Cited By ~ 53

Author(s):

John D. Clausen ◽

Timothy C. Ryken ◽

Vincent C. Traynelis ◽

Paul D. Sawin ◽

Franklin Dexter ◽

...

Keyword(s):

Cervical Spine ◽

Locking Plate ◽

Axial Rotation ◽

Biomechanical Stability ◽

Content Type ◽

Flexion Extension ◽

Two Systems ◽

Biomechanical Evaluation ◽

The Moment ◽

Cadaveric Model

✓ There exist two markedly different instrumentation systems for the anterior cervical spine: the Cervical Spine Locking Plate (CSLP) system, which uses unicortical screws with a locking hub mechanism for attachment, and the Caspar Trapezial Plate System, which is secured with unlocked bicortical screws. The biomechanical stability of these two systems was evaluated in a cadaveric model of complete C5–6 instability. The immediate stability was determined in six loading modalities: flexion, extension, right and left lateral bending, and right and left axial rotation. Biomechanical stability was reassessed following fatigue with 5000 cycles of flexion-extension, and finally, the spines were loaded in flexion until the instrumentation failed. The Caspar system stabilized significantly in flexion before (p < 0.05) but not after fatigue, and it stabilized significantly in extension before (p < 0.01) and after fatigue (p < 0.01). The CSLP system stabilized significantly in flexion before (p < 0.01) but not after fatigue, and it did not stabilize in extension before or after fatigue. The moment needed to produce failure in flexion did not differ substantially between the two plating systems. The discrepancy in the biomechanical stability of these two systems may be due to differences in bone screw fixation.

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