Biomechanical properties of plate constructs for feline ilial fracture gap stabilization

Schmierer, Philipp A; Smolders, Lucas A.; Gueorguiev, Boyko; Pozzi, Antonio; Knell, Sebastian

doi:10.1111/vsu.13124

Cited by 11 publications

(41 citation statements)

References 24 publications

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“…In both publications, there were no differences found in comparison 2,26 . Contradictory results from feline ilial fracture gap models determined that single‐locking plates produced superior constructs compared with single‐non‐locking constructs 31 . The present study was not able to evaluate the interaction between the LPS‐provided biologic and biomechanic factors.…”

Section: Discussionmentioning

confidence: 58%

“…This should be interpreted with caution. Schmierer et al determined that double LPS have improved stiffness and resistance to failure compared to single NLS, double NLS, and single LPS in a feline ilial body fracture gap model 31 . The locking plates utilized in this cohort were the SOP (Orthomed) system, which is versatile to accommodate complex contouring and reduce weakening of the plate during bending 24 .…”

Section: Discussionmentioning

confidence: 99%

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Short‐term outcomes of 59 dogs treated for ilial body fractures with locking or non‐locking plates

et al. 2021

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Objective To determine the influence of plating systems on the clinical outcomes in dogs treated for ilial fractures. Design Retrospective study. Animals Fifty‐nine dogs (63 hemipelves). Methods Radiographs and medical records of dogs with ilial fractures presented to Iowa State University between 2003 and 2019 were reviewed. After fracture reduction, fractures were fixed with a locking plate system (LPS) or non‐locking plate system (NLS). Perioperative, long‐term complications, and follow‐up data were recorded. The frequency of implant failure and pelvic collapse were compared using a logistic and linear regression analysis, respectively. Where the univariate test was statistically significant, a multivariate analysis across categories was performed to identify statistically different categories. Results LPS and NLS implants were used in 25/63 and 38/63 hemipelves, respectively. Median follow‐up time was 8 weeks (3–624 weeks). Implant failure occurred in 18/63 (29%) of fracture repairs, consisting of 17 with NLS and 1 with LPS. Revision surgery was recommended in five cases of implant failure, all with NLS. The probability of implant failure was higher when fractures were fixed with NLS (p = .0056). All other variables evaluated did not seem to influence outcome measures. Conclusion The variable with the most influence on the outcomes of dogs treated for ilial fractures consisted of the fixation method (NLS vs. LPS). Fractures repaired with NLS were nearly 20 times more likely to fail than those repaired with LPS. Clinical Relevance Surgeons should consider repairing ilial body fractures in dogs with LPS to reduce the risk of short‐term implant failure.

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Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Short‐term outcomes of 59 dogs treated for ilial body fractures with locking or non‐locking plates

et al. 2021

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“…We believe that, given that these two groups used screws with similar diameters, orthogonal positioning may have potentially influenced the results. Implants positioned to allow the orthogonal placement of their screws have proven to be mechanically superior in other studies involving several types of implants [19, 20]. In the study by Baseri [34] where the authors compared the use of angle-stable nails and locking plates in the treatment of distal tibial fractures in humans, the authors stated that nails are mechanically more efficient than locking plates; however, the use of uniplanar nails requires the transverse fixation of Poller screws to avoid shear.…”

Section: Discussionmentioning

confidence: 99%

“…However, these systems remain unavailable or have not been sufficiently tested for clinical application in dogs, cats, and other animals. Orthopedic implants applied in multiple planes are used in challenging scenarios, such as, for example, patients who are considerably heavy or robust, large animals, wild animals, and in metaphyseal or epiphyseal fractures with fragments that are too small [19, 20]. The main advantages of this configuration are correlated with increases in the area moment of inertia and the consequent marked expansion of the system’s mechanical resistance, in addition to the potential capacity for fixing fragments to bone extremities with limited area for fixation [21, 22].…”

Section: Introductionmentioning

confidence: 99%

Biomechanical evaluation of a novel orthogonal angle-stable interlocking nail in a canine femur model Novel orthogonal angle-stable interlocking nail

Lucena

Minto

Rocha

et al. 2021

Preprint

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Interlockings nails (IN) are orthopedic implants with superior mechanical and, potentially, biological qualities. Despite the countless and indisputable advantages of current angle-stable models, there are still limitations for their use in certain scenarios. The objective of the present study was to describe and biomechanically test a new orthogonal angle-stable intramedullary nail model for veterinary use. The proposed orthogonal angle-stable nail has two 3.8-mm threaded cylindrical holes in each of its portions: in the proximal portion, the holes are 11 mm apart; in the distal portion, the penultimate orifice is positioned at 90 degrees in relation to the last one, with a distance of 5.5 mm between them. The novel orthogonal nail (Group 3 – G3) was evaluated and compared biomechanically with the conventional interlocking nail (Group 1 – G1) and the uniplanar angle-stable nail (Group 2 – G2) by means of destructive torsion and axial compression tests. No statistically significant differences were observed in torsion resistance between the groups in the destructive tests. However, statistical differences were found in stiffness values in the compression tests between the orthogonal (G3) and conventional interlocking (G1) nails (p=0.01) and also between the uniplanar (G2) and interlocking (G1) nails (p=0.001). The new orthogonal nail proved to be biomechanically similar to the uniplanar angle-stable model and superior to the conventional nail . This new arrangement of interlocking screws (orthogonal and closer to each other) potentially enables the fixation of small fragments and at the extremities of long bones in dogs. Nonetheless, further clinical studies are necessary to validate such hypotheses.

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“…7 In situations where this cannot be achieved with one laterally applied plate, alternatives like placing two lateral plates (1 dorsal and 1 ventral), extending the plate over the acetabulum, applying the plate dorsal to the ilium or combining lateral and dorsal plating can be considered. 11,13,14 The objective of this study was to assess the frequency of implant failure and the extent of pelvic canal narrowing associated with the fixation of ilial fractures in cats with a single lateral veterinary cuttable plate (SLP) or double lateral veterinary cuttable plates (DLP) on the lateral surface of the ilium.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Single versus Double Lateral Plating in Treatment of Feline Ilial Fractures Using Veterinary Cuttable Plates

Wiersema

Koolen

Theyse

et al. 2021

Vet Comp Orthop Traumatol

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Objective The aim of this study was to compare the frequency of implant failure and the extent of pelvic canal narrowing associated with the fixation of ilial fractures in cats with a single veterinary cuttable plate (SLP) or double veterinary cuttable plates (DLP) applied to the lateral surface of the ilium. Study Design Radiographic evaluation of feline ilial fractures plated laterally using SLP or DLP. Pelvic canal narrowing directly postoperatively and at 6 weeks follow-up was objectively measured using the sacral index (SI). Radiographs were evaluated for implant failure and fracture healing. Results Seventy-seven cats satisfied the inclusion criteria. Twenty-nine fractures were treated with a SLP and 48 with DLP. Implant failure occurred significantly more (p = 0.001) in the SLP group (14/29) compared with the DLP group (6/48). Follow-up SI was significantly different between the two groups (p = 0.048, SLP median: 1.0 range: 0.83–2.4, DLP median: 0.98; range: 0.76–1.45). Median change in SI was −0.04 (range: −1.4–0.05) in the SLP group and 0.0 (range: −0.23–0.23) in the DLP group. This difference was significantly different (p = 0.031). Conclusion DLP leads to significantly less implant failure and significantly less pelvic canal narrowing compared with SLP. This difference in pelvic canal narrowing was small and the clinical relevance remains unclear.

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Biomechanical properties of plate constructs for feline ilial fracture gap stabilization

Cited by 11 publications

References 24 publications

Short‐term outcomes of 59 dogs treated for ilial body fractures with locking or non‐locking plates

Short‐term outcomes of 59 dogs treated for ilial body fractures with locking or non‐locking plates

Biomechanical evaluation of a novel orthogonal angle-stable interlocking nail in a canine femur model Novel orthogonal angle-stable interlocking nail

Comparison of Single versus Double Lateral Plating in Treatment of Feline Ilial Fractures Using Veterinary Cuttable Plates

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