Biomechanical Properties of Novel Lateral Hole Pedicle Screws and Solid Pedicle Screws: A Comparative Study in the Beagle Dogs

Hu, Yong; Chu, Zhen‐tao; Shen, Shu‐feng; Zhong, Jianbin; Zhu, Bingke; Wu, Jia‐da; Yuan, Zhenshan; Dong, Weixin

doi:10.1111/os.13596

Cited by 3 publications

(2 citation statements)

References 41 publications

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“…A previous study 26 compared the biomechanical properties of hollow lateral holes and solid screws. The results of this study showed that hollow lateral hole screws had significantly better pull‐out and bending resistances than solid screws.…”

Section: Discussionmentioning

confidence: 99%

Biomechanical Properties of Novel Porous Scaffold Core and Hollow Lateral Hole Pedicle Screws: A Comparative Study in Bama Pigs

Hu,

Chen,

Chu

et al. 2024

Orthopaedic Surgery

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ObjectiveScrew loosening is a common complication of internal fixation of pedicle screw. Therefore, the development of a pedicle screw with low loosening rate and high biosafety is of great clinical significance. This study aimed to investigate whether the application of a porous scaffold structure can improve the stability of pedicle screws by comparing the biomechanical properties of novel porous scaffold core pedicle screws (PSCPSs) with those of hollow lateral hole pedicle screws (HLHPSs) in a porcine lumbar spine.MethodsThirty‐two pedicle screws of both types were implanted bilaterally into the L1–4 vertebrae of four Bama pigs, with our newly designed PSCPSs on the right and HLHPSs on the left. All the Bama pigs were sacrificed 16 weeks postoperatively, and the lumbar spine was freed into individual vertebrae. Biomechanical properties of both the pedicle screws were evaluated using pull‐out tests, as well as cyclic bending and pull‐out tests, while the mechanical properties were assessed using three‐point bending tests. The data generated were statistically analyzed using paired‐sample t‐tests and two independent sample t‐tests.ResultsWe found that the maximal pull‐out forces before and after cyclic bending of the PSCPSs (1161.50 ± 337.98 N and 1075.25 ± 223.33 N) were significantly higher than those of the HLHPSs (948.38 ± 194.32 N and 807.13 ± 242.75 N) (p < 0.05, p < 0.05). In 800 cycles of the bending tests, neither PSCPS nor HLHPS showed loosening or visible detachment, but their maximal pull‐out forces after cyclic bending tests decreased compared to those in cycles without cyclic bending tests (7.43% and 14.89%, respectively), with no statistical significance (p > 0.05 and p > 0.05, respectively). Additionally, both screws buckled rather than broke in the three‐point bending tests, with no statistically significant differences between the maximal bending load and modulus of elasticity of the two screws (p > 0.05 and p > 0.05, respectively).ConclusionsCompared with the HLHPSs, the PSCPSs have greater pull‐out resistance and better fatigue tolerance with appropriate mechanical properties. Therefore, PSCPSs theoretically have significant potential for clinical applications in reducing the incidence of loosening after pedicle screw implantation.

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Section: Discussionmentioning

confidence: 99%

Biomechanical Properties of Novel Porous Scaffold Core and Hollow Lateral Hole Pedicle Screws: A Comparative Study in Bama Pigs

Hu,

Chen,

Chu

et al. 2024

Orthopaedic Surgery

Self Cite

View full text Add to dashboard Cite

show abstract

“…Of these, osteoporosis is a crucial risk factor of screw loosening [24] . The density of bone at the interface between the bone and screw has been found to be closely linked to the occurrence of screw loosening [3,25] .…”

Section: Discussionmentioning

confidence: 99%

Biomechanical analysis of detachable duet screw to resist intraoperative screw loosening.

Zhang,

Hu,

Zhao

et al. 2023

Preprint

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Purpose Pedicle screws are widely used in spinal fusion surgery, while screw loosening frequently occurs during spinal deformity correction. The aim of this study was to evaluate whether detachable duet screw can resist cutting or breach of pedicle walls under tensile test. Methods In this study, a novel duet screw was designed and developed for the purpose of spinal deformity correction. Eight spine specimens from goats were used and divided into two groups: group A (traditional insertion) and group B (combination of two detachable duet screws). Prior to biomechanical testing, the average density of the vertebrae was determined using quantitative computed tomography (QCT). To simulate the distraction or compression process during spinal deformity correction, loading was applied to the side of the screw through the rod, which was perpendicular to the pedicle screw axis. The process from initiation to the breach of the pedicle was assessed in order to determine the effectiveness of the duet screw. Results The quantitative computed tomography (QCT) analysis revealed that the average bone density of the entire goat population was 500.63 ± 37.88 mg/cm3. In group A and group B, the mean maximum failure load (MFL) was determined to be 1052.38 N and 1762.25 N, respectively. Notably, the average MFL exhibited a significant increase in group B compared to group A (P < 0.05). Conclusion The implementation of detachable duet screws exhibits the potential to enhance the resistance against screw loosening by connecting two screws under tensile force. This investigation offers valuable preclinical evidence for future clinical applications.

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Micro-Computed Tomography Analysis and Histological Observation of the Screw-Bone Interface of Novel Porous Scaffold Core Pedicle Screws and Hollow Lateral Hole Pedicle Screws: A Comparative Study in Bama Pigs

Hu,

Chen,

Chu

et al. 2024

World Neurosurgery

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Biomechanical Properties of Novel Lateral Hole Pedicle Screws and Solid Pedicle Screws: A Comparative Study in the Beagle Dogs

Cited by 3 publications

References 41 publications

Biomechanical Properties of Novel Porous Scaffold Core and Hollow Lateral Hole Pedicle Screws: A Comparative Study in Bama Pigs

Biomechanical Properties of Novel Porous Scaffold Core and Hollow Lateral Hole Pedicle Screws: A Comparative Study in Bama Pigs

Biomechanical analysis of detachable duet screw to resist intraoperative screw loosening.

Micro-Computed Tomography Analysis and Histological Observation of the Screw-Bone Interface of Novel Porous Scaffold Core Pedicle Screws and Hollow Lateral Hole Pedicle Screws: A Comparative Study in Bama Pigs

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