Preliminary Investigation on Mechanical Properties of Polymer Coating Screws for the Future Fragility Fracture Fixation

Filip, Alexandru; Bădulescu, Oana Viola; Sîrbu, Paul Dan; Veliceasa, Bogdan; Puha, Bogdan; Pascal, Ionut Alin; Andrusca, Liviu; Oprea, Stefan; Filip, Cristiana; Alexa, Ovidiu

doi:10.37358/mp.19.3.5229

Cited by 5 publications

(6 citation statements)

References 15 publications

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“…New hydroxyapatite-polymers were synthesized at the Institute of Macromolecular Chemistry "Petru Poni", Iasi, Department of Polyaddition and Photochemistry by incorporating different HA concentrations in the mass of the polyurethane acrylate polymer. The polyurethane acrylate polymer was previous tested for the capacity to augment orthopedic screw fixation on artificial osteoporotic bone [15]. In the present study we continue the previous research by trying to obtain a better compatibility to the bone matrix by incorporating hydroxyapatite into the PUA polymer mass.…”

Section: Experimental Partmentioning

confidence: 61%

“…1, fig.2, and fig.3 respectively. In our previous study [15] on improving the fixation of orthopedic screws by polymer coating, we obtained an increase of resistance for both malleolar and cancerous screws after PUA coating. If we add the results obtained in the previous study with the present one, we can conclude that, after different types of polymeric coatings, the best mechanical strength obtained, is for the malleolar screw with PUA-10% HA coating (1.670±0.09 N for coating PUA-10% HA versus 1.060±0.012 N for uncoated screw) and for the cancellous screw covered only with PUA (1.280±0.03 N for PUA coverage versus 1.150±0.005 N for uncoated screw).…”

Section: Resultsmentioning

confidence: 85%

“…In our previous work [15], we had studied the improvement of the orthopedic screw fixation by covering it with a particular polyurethane, namely acrylic polyurethane (PUA). Our data showed a better adhesion between the metal device and the synthetic bone samples after PUA coating.…”

Section: Abstract: Polyurethane Acrylate Hydroxyapatite Fragility mentioning

confidence: 99%

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Assessment of the Mechanical Properties of Orthopedic Screws Coated with Polyurethane Acrylate Containing Hydroxyapatite, Intended to Fix the Fragility Fractures

Filip¹,

Alexa²,

Sîrbu³

et al. 2019

Mat.Plast.

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The fragility fracture fixation confronts with the major problem of implant loosening due to the altered bone structure. Techniques used to fragility fracture stabilization includes metals devices, cements or adhesives. Different types of cements and adhesive can be obtained by chemical manipulation in order to provide a more efficient transition between the metal surface and the real bone. Thus, by selecting the appropriate chemical composition and ration between the components, synthetic cement and adhesive can provide a proper interface that ensure a perfect cohesion between the implant material and the natural bone. Most of the studies point the benefit of these synthetic materials in improving screw fixation strength. That is why, currently, the synthetic materials used in prosthesis are improved by associating with natural components of the bone, such as hydroxyapatite. For osteoporosis, which is characterized by demineralization, the association of the implanted material with hydroxyapatite is expected to be a suited solution for bone matrix regeneration after implantation. The aim of the current study was to assess the mechanical properties of orthopedic screws coated with a new polyurethane acrylate polymer containing hydroxyapatite in order to improve the stability of the screw for the subsequent fixation of the fragility fracture. To test the efficiency of the new hydroxyapatite containing polymer, the mechanical behavior of the coated screws was evaluated. Our data show that the augmented screw can be obtained by incorporating lower hydroxyapatite concentrations.

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Section: Experimental Partmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 85%

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Assessment of the Mechanical Properties of Orthopedic Screws Coated with Polyurethane Acrylate Containing Hydroxyapatite, Intended to Fix the Fragility Fractures

Filip¹,

Alexa²,

Sîrbu³

et al. 2019

Mat.Plast.

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“…Currently, the materials widely used in orthopedics are metal, bioceramics, and polymers [103][104][105][106][107][108][109][110]. Recent data suggest that a special interest is being given to biomedical nanotechnology.…”

Section: Future Perspectives For the Materials Used In Orthopedicsmentioning

confidence: 99%

Biomaterials in Orthopedic Devices: Current Issues and Future Perspectives

et al. 2022

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In orthopedics, bone fixation imposes the use of implants in almost all cases. Over time, the materials used for the implant have evolved from inert materials to those that mimic the morphology of the bone. Therefore, bioabsorbable, biocompatible, and bioactive materials have emerged. Our study aimed to review the main types of implant materials used in orthopedics and present their advantages and drawbacks. We have searched for the pros and cons of the various types of material in the literature from over the last twenty years. The studied data show that consecrated metal alloys, still widely used, can be successfully replaced by new types of polymers. The data from the literature show that, by manipulating their composition, the polymeric compounds can simulate the structure of the different layers of human bone, while preserving its mechanical characteristics. In addition, manipulation of the polymer composition can provide the initiation of desired cellular responses. Among the implanting materials, polyurethane is distinguished as the most versatile polymeric material for use both as orthopedic implants and as material for biomechanical testing of various bone reduction and fixation techniques.

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“…6 Also, methacrylic and acrylic acids were used to impart vinyl groups into the HU structures which served to make polyurethane acrylate polymers. 7 Michael addition and epoxy/amine reactions led, as well, to UVcurable PHU acrylates and methacrylates from amineterminated prepolymers, 6,8,9 whose formulations were optimized to make coatings with high-end properties, such as good chemical resistance, hardness, flexibility, and impact resistance. Interestingly, the Mülhaupt group made several HUMAs from glycerol carbonate methacrylate, which was prepared from glycidyl methacrylate, and different diamines.…”

Section: Introductionmentioning

confidence: 99%

Bio‐based and hydrolytically degradable hydroxyurethane acrylates as photocurable thermosets

Younes

Marić

2021

J of Applied Polymer Sci

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This study focuses on the synthesis of bio-based and hydrolytically degradable photocurable thermosets made from hydroxyurethane acrylates (HUA). The hydroxyurethanes (HUs) are prepared from the reaction between ethylene carbonate and a bio-based diamine, Priamine 1074. Subsequently, the HU initiates the ring opening polymerization of ε-caprolactone (CL), resulting in telechelic groups of 5 CL units at both ends of the HU. The resulting HU-CL 5 is finally acrylated to prepare the degradable HUA (HU-CL 5 -A) with transformations confirmed following each step via proton nuclear magnetic resonance ( 1 H-NMR) and Fourier-transform infrared (FTIR) spectroscopies. HU-CL 5 -A is photocured with 4-acryloylmorpholine (ACMO) as a photosensitive reactive diluent. The photocurable thermosets exhibit slight water swelling (swelling index of 46%), as Priamine 1074 and ACMO are hydrophobic and hydrophilic, respectively, leading to the slow and partial degradation of the films in water at 85 C for 14 days. The cleavage of the CL units from the film networks is proven via 1 H-NMR and FTIR, which demonstrates the main objective of this study in synthesizing photocurable and degradable HUA resins.

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Preliminary Investigation on Mechanical Properties of Polymer Coating Screws for the Future Fragility Fracture Fixation

Cited by 5 publications

References 15 publications

Assessment of the Mechanical Properties of Orthopedic Screws Coated with Polyurethane Acrylate Containing Hydroxyapatite, Intended to Fix the Fragility Fractures

Assessment of the Mechanical Properties of Orthopedic Screws Coated with Polyurethane Acrylate Containing Hydroxyapatite, Intended to Fix the Fragility Fractures

Biomaterials in Orthopedic Devices: Current Issues and Future Perspectives

Bio‐based and hydrolytically degradable hydroxyurethane acrylates as photocurable thermosets

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