Biomechanical Analysis of Locking Reconstruction Plate Using Mono- or Bicortical Screws

Santos, Rogério R.; Rahal, Sheila Canevese; Neto, Camilo Mesquita; Ribeiro, Celso Roberto; Sousa, Edson Antônio Capello; Foschini, C. R.; Agostinho, Felipe Stéfan; Mesquita, Luciane dos Reis

doi:10.1590/1980-5373-mr-2015-0596

Cited by 8 publications

(5 citation statements)

References 35 publications

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“…In this case, we opte Regardless, distal humerus fractures have many complications reported that should be awarded to the patient. Elbow stiffness, loss of full range of motion, infection, wound disturbances and nerve injury are expected in all osteosynthesis methods 22,28,[31][32][33][34][35][36][37][38][39] .…”

Section: Discussionmentioning

confidence: 99%

Extra-articular Distal Humerus Bridging Plate: a Minimally Invasive Technique

et al. 2022

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Extra-articular fractures of the distal humerus are challenging due to their peculiar location and anatomy. It challenges the surgeon to choose the best osteosynthesis method and approach. We present a minimally invasive technique by bridging the LCP Extra-articular distal humerus plate (DePuy-Synthes). The indication for this method was fractures classified as AO/OTA type 13A2 and 13A3. Concerns about the radial nerve pathway to avoid its injury are crucial to perform this method. Possible complications are shortening, rotational displacement, nerve injury and wrong plate and screw positioning.

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Section: Discussionmentioning

confidence: 99%

Extra-articular Distal Humerus Bridging Plate: a Minimally Invasive Technique

et al. 2022

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“…10,11 For locking screws, cross-threading between the screw head and plate hole threads provides enough angular stability for unicortical application, 10 but the construct resistance may not be the same when the locking screw is applied bicortically. [12][13][14] The use of only locking screws has also been suggested for PIP arthrodesis, 4 with retrospective studies reporting the use of bicortical screws in the proximal plate hole without describing potential risks of peri-implant fractures. 15,16 In a meta-analysis, de Souza and colleagues found that 65% of horses undergoing PIP arthrodesis (using different implants) returned to their activities.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Failure Mode of Proximal Screw Fixation Technique Using Locking Compression Plate for Proximal Interphalangeal Arthrodesis in Horses: An Ex Vivo Study

de Souza,

Pereira,

Costa

et al. 2024

Vet Comp Orthop Traumatol

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Objective The aim of this study was to measure the mechanical properties and failure mode of an ex vivo model of proximal interphalangeal arthrodesis in horses with different methods of proximal screw fixation using a locking compression plate. Study Design Pastern joint arthrodesis with a 3-hole 4.5-mm narrow locking compression plate was performed on 20 forelimbs of equine cadavers, randomized into four groups based on the fixation method and type of proximal screw used: unicortical cortex, bicortical cortex, unicortical locking, bicortical locking. Single-cycle axial compression testing was conducted until failure. The frequency of implant plastic deformation was recorded. Bone failure analysis was performed through computed tomography examinations and fractal analysis. Results There were no differences in the analysed mechanical variables and fractal dimension among the groups. Transarticular screws showed a higher frequency of deformation (75%) regardless of the group. Both unicortical locking and bicortical locking groups deformed the plate more frequently. Conclusion The type of screw used in the proximal hole of the locking compression plate and its method of anchoring in the proximal phalanx do not affect the mechanical properties of pastern arthrodesis in equine cadavers subjected to single-cycle axial compression tests until failure.

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“…Santos et al [18] highlight the importance of screw length by using bicortical and unicortical to determine the stability of the implant fixation with a different type of plate system in vitro study. According to the previous invitro study [5], the bicortical has greater stability where it can make a connection between plate and bone interface with the distal cortex of the bone.…”

Section: Introductionmentioning

confidence: 99%

Stress Shielding Prediction of Unicortical and Bicortical Screws: A Finite Element Analysis

Djanali¹

2023

JMechE

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The stability in an implant fixation plays a vital role in ensuring proper formation and remodelling process of the fractured bone. Failure in implant fixation is commonly associated with short- and long-term instability of the bone-implant interface. The bone-implant interaction creates a complicated mechanical interplay that might influence the stress distribution and hence the biomechanical performance stability of the implant fixation. Furthermore, implant screw parameters namely thread size, geometrical design and material properties become additional factors that affect the bone-implant interaction. The purpose of this study was to investigate the effect of unicortical and bicortical screws’ parameters on the screw-bone interaction mechanism. To evaluate the stress transfers between screw and bone, the stress parameters namely stress transfer parameters (STP) was employed. A two-dimensional (2D) finite element model of full treaded screw was simulated while varying the parameters of the screw: two types of material (stainless steel A316 and titanium alloy Ti-6Al-4V), screw length and screw pitch. It was found that the lower in elastic modulus results to the higher stress transfer between implant- bone interface. As the titanium have lower elastic modulus, it gave higher values of STP which help to transmit and distribute stress better compared to the stainless steel. While the effect of varying screw pitch between two types of screws shows that STPs values of fully threaded bicortical screws shows significant result for finer pitch size that may advancing bone remodelling process at the early stage.

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Biomechanical Analysis of Locking Reconstruction Plate Using Mono- or Bicortical Screws

Cited by 8 publications

References 35 publications

Extra-articular Distal Humerus Bridging Plate: a Minimally Invasive Technique

Extra-articular Distal Humerus Bridging Plate: a Minimally Invasive Technique

Mechanical Properties and Failure Mode of Proximal Screw Fixation Technique Using Locking Compression Plate for Proximal Interphalangeal Arthrodesis in Horses: An Ex Vivo Study

Stress Shielding Prediction of Unicortical and Bicortical Screws: A Finite Element Analysis

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