Pullout strength of monocortical and bicortical screws in meta -physeal and diaphyseal regions of the canine humerus

Vaughn, Denty Paul; Syrcle, Jason A.; Ball, John; Elder, Steven H.; Gambino, Jennifer Michele; Griffin, Russell; McLaughlin, Ronald

doi:10.3415/vcot-15-11-0192

Cited by 13 publications

(5 citation statements)

References 16 publications

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“…Canine femoral diaphyseal cortical bone has been shown to have a density similar to that of the 50 PCF foam, 12 so 40 PCF foam sheets were used in addition to replicate other areas of the canine skeleton likely having a lower density than the femoral diaphysis, such as humeral diaphysis and condyle. 11 The 20 PCF cellular foam block has a density similar to canine femoral cancellous bone. 12 For the polyurethane sheets, the material was cut into 3 cm x 3 cm squares with an oscillating sagittal saw and mounted into a vice with a central marked target for the surgeon to begin the drill hole.…”

Section: Materials and Methods Synthetic Bone Model Testingmentioning

confidence: 99%

Sequential drilling and drill angulation reduce the accuracy of drill hole start location in a synthetic bone model

et al. 2019

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The accuracy of drill hole location is critical for implant placement in orthopaedic surgery. Increasing drill bit size sequentially has been suggested as a method for improving the accuracy of drill hole start location. The aim of this study was to determine whether sequential drilling or drill angulation would alter accuracy of drill hole start location. Three specialist veterinary surgeons drilled holes in synthetic bone models either directly, or with sequentially increasing drill bit sizes. Drilling was performed at 0o, 10o and 20o to perpendicular to the bone models. Three synthetic bone models were used to mimic canine cancellous and cortical bones. Sequential drilling resulted in greater inaccuracy in drill hole location when assessing all drilling angles together. There was no influence of surgeon or synthetic bone density on drilling accuracy. The combination of drill angulation and sequential drilling increased inaccuracy in drill hole start location. We conclude that sequential drilling decreased accuracy of drill hole location in the synthetic bone model when drilling was angled. Inaccuracy associated with the drill hole start location should be taken into account when performing surgery, although the magnitude of inaccuracy is low when compared with other sources of error such as angulation.

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Section: Materials and Methods Synthetic Bone Model Testingmentioning

confidence: 99%

Sequential drilling and drill angulation reduce the accuracy of drill hole start location in a synthetic bone model

et al. 2019

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“…A 2.4 mm 10-hole reconstruction locking plate was used and a transcondylar locking screw placed, which adds stability to this type of fracture; a transcondylar screw has been shown to have a greater pull-out strength than screws placed in other locations in the humerus in a canine study 19 and this screw placement is also helpful when there is minimal bone stock available in the distal fragment and when avoiding the supratrochlear foramen. The remaining screws were then inserted.…”

Section: Diaphyseal Fractures Of the Humerusmentioning

confidence: 99%

Feline Diaphyseal Fractures: Management and treatment options

Zurita

Craig²

2022

Journal of Feline Medicine and Surgery

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Practical relevance: Cats frequently present with diaphyseal fractures, which require treatment in order to achieve a good return to function. These fractures often occur due to significant trauma; for example, as a result of road traffic accidents, high-rise syndrome and dog bite wounds. The first priority is to ensure the patient is systemically well before embarking on any specific surgical treatment of a fracture. Clinical challenges: Surgical management of diaphyseal fractures can be challenging due to the surgical approach for some bones being technically demanding, for example because of the presence of important neurovascular structures, and the small size of feline bones, which limits the choice of implant size and strength. Further, it may be difficult to visualise fracture alignment when using minimally invasive techniques, although the use of intraoperative fluoroscopy can aid with this, and malalignment can be common for some fracture repairs, particularly in cases where anatomical reconstruction is not possible. Aims: This review focuses on diaphyseal long bone fractures and aims to assist decision-making, with an overview of the management and treatment options available. Evidence base: Many textbooks and original articles have been published on aspects of managing fractures in small animals. The authors also provide recommendations based upon their own clinical experience.

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“…This is a reasonable alternative option to avoid complications related to bicortical screws 11 . Studies have shown that monocortical fixation using the locking plate system is as safe and secure as bicortical screw fixation, and screws with longer working lengths, even when not bicortical, were more resistant to pullout 11–13 . In this study, a fissure was determined on the cauda‐medial surface of the distal femur fragment.…”

Section: Discussionmentioning

confidence: 96%

“…11 Studies have shown that monocortical fixation using the locking plate system is as safe and secure as bicortical screw fixation, and screws with longer working lengths, even when not bicortical, were more resistant to pullout. [11][12][13] In this study, a fissure was determined on the cauda-medial surface of the distal femur fragment. Monocortical fixation was applied in order to prevent fracture.…”

Section: Discussionmentioning

confidence: 99%

3D‐printed model of a femur fracture and treatment with plate osteosynthesis in a red‐eared slider (Trachemys scripta elegans)

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et al. 2023

Vet Record Case Reports

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A 7‐year‐old, female, red‐eared slider turtle was presented with proximal diaphyseal oblique femoral fracture due to falling out of bed. A preoperative evaluation with computed tomography was performed to evaluate the fracture anatomy of the femur. The appropriate implant selection was decided upon the three‐dimensional printed model before the plate osteosynthesis. Follow‐up time for the patient was 6 months and the functional outcome was considered excellent. In conclusion, three‐dimensional printing before plate osteosynthesis has many advantages on the success rate by shortening the operation time in extraordinary orthopaedic patients, such as the red‐eared slider turtle.

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Pullout strength of monocortical and bicortical screws in meta -physeal and diaphyseal regions of the canine humerus

Cited by 13 publications

References 16 publications

Sequential drilling and drill angulation reduce the accuracy of drill hole start location in a synthetic bone model

Sequential drilling and drill angulation reduce the accuracy of drill hole start location in a synthetic bone model

Feline Diaphyseal Fractures: Management and treatment options

3D‐printed model of a femur fracture and treatment with plate osteosynthesis in a red‐eared slider (Trachemys scripta elegans)

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