Canine Lumbar Spinal Internal Fixation Techniques A Comparative Biomechanical Study

Fifty embalmed human tibias were osteotomized to create a simulated vertical shear (supination-adduction) fracture of the medial malleolus and were stabilized using one of five internal fixation techniques. In offset axial testing, which simulated supination-adduction loading, the fixation strength of tibias stabilized with either cortical or cancellous lag screws placed perpendicular to the osteotomy was over five times greater than the strength of those treated with an antiglide plate and nearly two and a half times greater than those treated with cancellous lag screws placed oblique to the osteotomy. The tibias stabilized with cancellous lag screws placed perpendicular to the osteotomy exhibited twice the fixation strength of the tibias stabilized with an antiglide plate and distal lag screw. The tibias stabilized with an antiglide plate and distal lag screw and perpendicularly placed cortical or cancellous lag screws demonstrated three times greater resistance to displacement to the applied supination-adduction load than those stabilized with an antiglide plate alone. In offset transverse testing, to simulate loading in external rotation, the mean failure load of the tibias stabilized with cancellous lag screws placed perpendicular to the osteotomy was over two and a half times greater than those stabilized with an antiglide plate and distal lag screw. No significant differences were observed in the resistance to displacement for these tests. These results support the use of lag screws placed perpendicular to the fracture surface for stabilization of vertical shear fractures of the medial malleolus and indicate that the use of an antiglide plate, with or without a distal lag screw, does not offer any advantage over lag screw fixation.

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Biomechanical Study in Polyurethane Mandibles of Different Metal Plates and Internal Fixation Techniques, Employed in Mandibular Angle Fractures

Journal of Craniofacial Surgery ◽

10.1097/scs.0000000000001157 ◽

2014 ◽

Vol 25 (6) ◽

pp. 2246-2250 ◽

Cited By ~ 4

Author(s):

Fernando Pozzi Semeghini Guastaldi ◽

Eduardo Hochuli-Vieira ◽

Antonio Carlos Guastaldi

Keyword(s):

Internal Fixation ◽

Biomechanical Study ◽

Mandibular Angle ◽

Metal Plates ◽

Fixation Techniques ◽

Angle Fractures

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Arthrodesis of the First Metatarsophalangeal Joint: A Biomechanical Study of Internal Fixation Techniques

Foot & Ankle ◽

10.1177/107110079301400705 ◽

1993 ◽

Vol 14 (7) ◽

pp. 395-399 ◽

Cited By ~ 84

Author(s):

Mark J. Curtis ◽

Mark Myerson ◽

Riyaz H. Jinnah ◽

Quentin G.N. Cox ◽

Ian Alexander

Keyword(s):

Internal Fixation ◽

Testing Machine ◽

Biomechanical Testing ◽

Metatarsophalangeal Joint ◽

Biomechanical Study ◽

Materials Testing ◽

Dorsal Plate ◽

First Metatarsophalangeal Joint ◽

Joint Surfaces ◽

Fixation Techniques

This study compares the strength and rigidity of four methods of internal fixation for arthrodesis of the first metatarsophalangeal joint. Ten matched pairs of cadaveric first rays were harvested and arthrodesis performed by one of four techniques: (1) planar excision of joint surfaces and fixation with crossed Kirschner wires, (2) planar excision of joint surfaces and internal fixation with a dorsal plate and screws, (3) planar excision of joint surfaces and internal fixation with an interfragmentary screw, or (4) excision of the joint surfaces using powered conical reamers and fixation with an interfragmentary lag screw. Biomechanical testing with a Bionix 858 materials testing machine was carried out, applying a plantar force utilizing principles of cantilever loading. Force applied and displacement of the arthrodesis were recorded. Of the four methods tested, bony preparation with power conical reamers and supplementary interfragmentary screw fixation was the most stable.

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Application of on-line analytical processing in evaluating factors influencing effect of posterior lumbar internal fixation in treatment of lumbar spinal nerve root damage

Academic Journal of Second Military Medical University ◽

10.3724/sp.j.1008.2010.00691 ◽

2010 ◽

Vol 30 (6) ◽

pp. 691-693

Author(s):

Guo-dong SHI ◽

Yue-ping OUYANG ◽

Jian-gang SHI ◽

Lian-shun Jia ◽

Wen YUAN

Keyword(s):

Internal Fixation ◽

Nerve Root ◽

Spinal Nerve ◽

Spinal Nerve Root ◽

Root Damage ◽

Factors Influencing ◽

On Line ◽

Analytical Processing ◽

On Line Analytical Processing ◽

Lumbar Spinal

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Open reduction of pediatric lateral condyle fractures: a systematic review

Shoulder & Elbow ◽

10.1177/17585732211010299 ◽

2021 ◽

pp. 175857322110102

Author(s):

Michael D Eckhoff ◽

Josh C Tadlock ◽

Tyler C Nicholson ◽

Matthew E Wells ◽

EStephan J Garcia ◽

...

Keyword(s):

Systematic Review ◽

Internal Fixation ◽

Range Of Motion ◽

Lateral Condyle ◽

Elbow Fracture ◽

Infection Rates ◽

Fixation Techniques ◽

K Wires ◽

Pediatric Elbow Fracture ◽

The Cost

Introduction Lateral condyle fractures are the second most common pediatric elbow fracture. There exist multiple options for internal fixation including buried K-wires, unburied K-wires, and screw fixation. Our study aims to review the current literature and determine if fixation strategy affects outcomes to include fracture union, postoperative range of motion, and need subsequent surgery. Methods A systematic review of Pubmed, MEDLINE, and EMBASE databases was performed. Included articles involve pediatric patients with displaced lateral condyle fractures treated with internal fixation that reported outcomes to include union rates and complications. Results Thirteen studies met inclusion criteria for a total of 1299 patients (472 buried K-wires, 717 unburied K-wires, and 110 screws). The patients’ average age was 5.8 ± 0.6 years, male (64%), and had 16.3 months of follow-up. No differences in union and infection rates were found. Unburied K-wires had the shortest time to union and the greatest elbow range of motion postoperatively. Conclusions Our systematic review demonstrates similar outcomes with union and infection rates between all fixation techniques. Unburied K-wires demonstrated a shorter time to union and the greatest postoperative range of motion. Additionally, unburied K-wires may be removed in clinic, decreasing the cost on the healthcare system. Evidence Level 3.

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A Biomechanical Evaluation of Three Forms of Internal Fixation Used in Ankle Arthrodesis

Foot & Ankle International ◽

10.1177/107110079401500603 ◽

1994 ◽

Vol 15 (6) ◽

pp. 297-300 ◽

Cited By ~ 45

Author(s):

Michael P. Dohm ◽

James B. Benjamin ◽

Jeffrey Harrison ◽

John A. Szivek

Keyword(s):

Internal Fixation ◽

Plate Fixation ◽

Ankle Arthrodesis ◽

Biomechanical Study ◽

The Other ◽

Fixation Failure ◽

Plate Group ◽

Biomechanical Evaluation ◽

The Stability ◽

Fibular Strut

A biomechanical study was undertaken to evaluate the relative stability of three types of internal fixation used for ankle arthrodesis. Crossed screw fixation, RAF fibular strut fixation, and T-plate fixation were tested in 30 cadaver ankles using an MTS machine. T-plate fixation consistantly provided the stiffest construct when compared with the other types of fixation. Failure occurred by distraction of bony surfaces, posterior to the plane of fixation, in the crossed screw and RAF groups. In contrast, failure in the T-plate group occurred through compression of bone anterior to the midcoronal plane of the tibia. Although the stability of fixation is only one factor in determining the success or failure of ankle arthrodesis, the results of this study would support T-plate fixation over the other forms tested.

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