Biomechanical comparison of bone-screw–fasteners versus traditional locked screws in plating female geriatric bone

DeBaun, Malcolm R.; Swinford, Steven T.; Chen, Michael; Thio, Timothy; Behn, Anthony W.; Lucas, Justin F.; Bishop, Julius A.; Gardner, Michael J.

doi:10.1016/j.injury.2019.10.032

Cited by 8 publications

(6 citation statements)

References 18 publications

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“…2 In plating female geriatric bone, the ITS provided comparable stability to traditional locking screws. 3 Simulated canine humeral condylar fractures stabilized with ITS resisted greater loads compared to constructs stabilized with standard AO buttress thread screws. 4 The effect of interlocking thread geometry on the biomechanical performance of orthopedic screws in equine bone has not yet been investigated.…”

Section: Introductionmentioning

confidence: 96%

“…In human tibiae, the ITS demonstrated greater resistance to torque failure without sacrificing axial pullout strength when tested against standard AO buttress thread screws 2 . In plating female geriatric bone, the ITS provided comparable stability to traditional locking screws 3 . Simulated canine humeral condylar fractures stabilized with ITS resisted greater loads compared to constructs stabilized with standard AO buttress thread screws 4 .…”

Section: Introductionmentioning

confidence: 96%

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Biomechanical comparison of compact versus standard flute drill bits, and interlocking versus buttress thread self‐tapping cortical bone screws in cadaveric equine third metacarpal condyle

et al. 2023

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ObjectivesTo compare (1) performance of compact versus standard flute drill bits, (2) screw insertion properties and (3) pullout variables between interlocking thread (ITS) and buttress thread (BTS) self‐tapping screws in third metacarpi.Study designIn vitro experimental study.Sample populationPaired third metacarpi from 11 Thoroughbreds aged 2–4 years.MethodsScrews were inserted into the lateral condylar fossae following bone preparation using the respective drill bit for each screw type. Screw pullout was achieved using a mechanical testing system. Density and porosity of bone surrounding screw holes was measured with microcomputed tomography following each pullout test. Drilling, screw insertion and pullout variables were compared between drill bit and screw types using repeated measures ANOVA. Linear regression analyses were used to characterize relationships between bone tissue properties and drill bit and screw outcomes.ResultsMaximum torque power spectral density (PSD) was lower for compact flute drill bits. Insertion torque was 50% higher for ITS. BTS had 33% greater preyield stiffness and 7% greater mean yield force. Bone tissue properties affected measured variables similarly for both screw and drill bit types.ConclusionsLower torque PSD may increase durability of the compact flute drill bit. ITS had greater insertional torque, which may reflect greater bone engagement. BTS had greater resistance to axial pullout forces.Clinical significanceMetacarpal bone provides a simple model for comparison of drill bit and screw designs. Use of ITS to repair equine fractures subject to predominantly tensile forces is not justified based on the results of this study.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

Biomechanical comparison of compact versus standard flute drill bits, and interlocking versus buttress thread self‐tapping cortical bone screws in cadaveric equine third metacarpal condyle

et al. 2023

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“…6 Another study found that nonlocked BSF was equivalent to locked buttress screws when applying cyclical multiaxial forces in geriatric cadaveric bone. 7 There is concern that poor quality bone cannot withstand shear forces from TBS in plate constructs, leading to stripping, insufficient screw purchase, lack of plate-bone compression, and therefore poor construct stability. 8 It is important to obtain sufficient compression for fracture fixation stability, and the BSF may be able to overcome these difficulties.…”

Section: Introductionmentioning

confidence: 99%

“…6 Another study found that nonlocked BSF was equivalent to locked buttress screws when applying cyclical multiaxial forces in geriatric cadaveric bone. 7…”

Section: Introductionmentioning

confidence: 99%

A Novel Bone-Screw-Fastener Demonstrates Greater Maximum Compression Force Prior to Failure Compared to a Traditional Buttress Screw.

Thorne,

Featherall,

O’Neill

et al. 2024

Journal of Orthopaedic Trauma

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Objectives: This study compared the maximal compression force prior to thread stripping of the novel bone-screw-fastener (BSF) compared to the traditional-buttress-screw (TBS) in synthetic osteoporotic and cadaveric bone models. Methods: Maximum compression force of the plate-bone interface prior to loss of screw purchase during screw tightening was measured between self-tapping 3.5mm BSF and 3.5mm TBS using calibrated load cells. Three synthetic biomechanical models were used: a synthetic osteoporotic diaphysis (model 1); a 3-layer biomechanical polyurethane foam with 50-10-50 pounds-per-cubic-foot (PCF) layering (model 2), and a 3-layer polyurethane foam with 50-15-50 PCF layering (model 3). For the cadaveric metaphyseal model, three sets of cadaveric tibial plafonds and three sets of cadaveric tibial plateaus were used. A plate with sensors between the bone-plate interface was used to measure compression force during screw tightening in the synthetic bone models, while an annular load cell that measured screw compression as it slid through a guide was used to measure compression in the cadaver models. Results: Across all synthetic osteoporotic bone models, the BSF demonstrated greater maximal compression force prior to stripping compared to the TBS (model 1, 155.51N(SD=7.77N) vs 138.78N(SD=12.74N), p=0.036; model 2, 218.14N (SD=14.15N) vs 110.23N(SD=8.00N), p<0.001; model 3, 382.72N(SD=20.15) vs 341.09N(SD=15.57N), p=0.003. The BSF had greater maximal compression force for the overall cadaver trials, the tibial plafond trials, and the tibial plateau trials (overall, 111.27N vs 97.54N(SD 32.32N), p=0.002; plafond, 149.6N vs 132.92N(SD 31.32N), p=0.006; plateau 81.33N vs 69.89N(SD 33.38N), p=0.03. Conclusion: The novel bone-screw-fastener generated 11-65% greater maximal compression force than the traditional-buttress-screw in synthetic osteoporotic and cadaveric metaphyseal bone models. A greater compression force may increase construct stability, facilitate early weight bearing, and reduce construct failure.

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“…Improving the fixation strength of bone screws is a feasible way to reduce the failure rate [8]. Screw thread is the determinant component that governs the initial screw stability of fixation, therefore, it is extremely important to choose the right thread profile for the bone screw [9][10][11]. Bone screws are derived from industrial screws with various thread designs for different purposes [12].…”

Section: Introductionmentioning

confidence: 99%

Fixation stability comparison of bone screws based on thread design: buttress thread, triangle thread, and square thread

Feng

Luo

et al. 2022

BMC Musculoskelet Disord

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Background The influence of thread profile on the fixation stability of bone screws remains unclear. This study aimed to compare the fixation stability of screws with different thread profiles under several loading conditions. Methods Bone screws that differed in thread profile (buttress, triangle, and square thread) only were made of stainless steel. Their fixation stabilities were evaluated individually by the axial pullout test and lateral migration test, besides, they were also evaluated in pairs together with a dynamic compression plate and a locking plate in polyurethane foam blocks under cyclic craniocaudal and torsional loadings. Results The triangle-threaded and square-threaded screws had the highest pullout forces and lateral migration resistance. When being applied to a dynamic compression plate, higher forces and more cycles were required for both triangle- and square-threaded screws to reach the same displacement under cyclic craniocaudal loading. On the other hand, the triangle-threaded screws required a higher torque and more cycles to reach the same angular displacement under cyclic torsional loading. When being applied to a locking plate, the square-threaded screws needed higher load, torque, and more cycles to reach the same displacement under both cyclic craniocaudal and torsion loadings. Conclusions The triangle-threaded screws had superior pullout strength, while square-threaded screws demonstrated the highest lateral migration resistance. Moreover, dynamic compression plate fixation with triangle- and square-threaded screws achieved more favorable fixation stability under craniocaudal loading, while triangle-threaded screws demonstrated superior fixation stability under torsional loading. Locking plate fixation with a square-threaded screw achieved better fixation stability under both loading types.

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Biomechanical comparison of bone-screw–fasteners versus traditional locked screws in plating female geriatric bone

Cited by 8 publications

References 18 publications

Biomechanical comparison of compact versus standard flute drill bits, and interlocking versus buttress thread self‐tapping cortical bone screws in cadaveric equine third metacarpal condyle

Biomechanical comparison of compact versus standard flute drill bits, and interlocking versus buttress thread self‐tapping cortical bone screws in cadaveric equine third metacarpal condyle

A Novel Bone-Screw-Fastener Demonstrates Greater Maximum Compression Force Prior to Failure Compared to a Traditional Buttress Screw.

Fixation stability comparison of bone screws based on thread design: buttress thread, triangle thread, and square thread

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