Manufacture and mechanical properties of knee implants using SWCNTs/UHMWPE composites

Zavala, José M. Diabb; Gutiérrez, Héctor Manuel Leija; Segura-Cárdenas, Emmanuel; Mamidi, Narsimha; Morales-Ávalos, Rodolfo; Villela-Castrejón, Javier; Elı́as-Zúñiga, Alex

doi:10.1016/j.jmbbm.2021.104554

Cited by 48 publications

(12 citation statements)

References 47 publications

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“…Although various new biomaterials are introduced for biomedical applications, PEEK has been widely used for dental applications [52][53][54][55][56][57]. The abrasion resistance, color stability, and displacement resistance of the restorative material are the important properties of restorative materials [5][6][7]9].…”

Section: Discussionmentioning

confidence: 99%

“…The present report tested only wear, color stability, and displacement. It could be interesting in the future to test and compare PEEK materials also for flexural strength [82], synergic potential [83], and biocompatibility using cell culture [52,84]. In addition, the future scope of this research is a long-term split-mouth double-blinded randomized controlled clinical trial to evaluate the wear pattern and color stability of the zirconia and PEEK crowns.…”

Section: Discussionmentioning

confidence: 99%

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Wear Resistance, Color Stability and Displacement Resistance of Milled PEEK Crowns Compared to Zirconia Crowns under Stimulated Chewing and High-Performance Aging

et al. 2021

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Recently, polyetheretherketone (PEEK) has been introduced to the dental market as a high-performance and chemically inert biomaterial. This study aimed to compare the wear resistance, abrasiveness, color stability, and displacement resistance of zirconia and PEEK milled crowns. An ideal tooth preparation of a first maxillary molar was done and scanned by an intraoral scanner to make a digital model. Then, the prosthetic crown was digitally designed on the CAD software, and the STL file was milled in zirconia (CaroZiir S, Carol Zircolite Pvt. Ltd., Gujarat, India) and PEEK (BioHpp, Bredent GmbH, Senden, Germany) crowns using five-axis CNC milling machines. The wear resistance, color stability, and displacement resistance of the milled monolithic zirconia with unfilled PEEK crowns using a chewing simulator with thermocyclic aging (120,000 cycles) were compared. The antagonist wear, material wear, color stability, and displacement were evaluated and compared among the groups using the Wilcoxon–Mann–Whitney U-test. Zirconia was shown to be three times more abrasive than PEEK (p value < 0.05). Zirconia had twice the wear resistance of PEEK (p value < 0.05). Zirconia was more color stable than PEEK (p value < 0.05). PEEK had more displacement resistance than zirconia (p value < 0.05). PEEK offers minimal abrasion, better stress modulation through plastic deformation, and good color stability, which make it a promising alternative to zirconia crown.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Wear Resistance, Color Stability and Displacement Resistance of Milled PEEK Crowns Compared to Zirconia Crowns under Stimulated Chewing and High-Performance Aging

et al. 2021

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“…As the concentration of chitosan increased in scaffold, augmented mechanical strength (from 1.74 MPa to 17.99 Mpa) was displayed through XRD patterns. The degree of protonation and extent of crystallinity mediated the high strength of chitosan [ 23 , 24 , 25 ]. Britto et al (2007) synthesized quaternary salts of chitosan through dimethylsulphate reaction.…”

Section: Quaternized Chitosan Derivatives and Physicochemical Propertiesmentioning

confidence: 99%

Biomedical Applications of Quaternized Chitosan

et al. 2021

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The natural polymer chitosan is the second most abundant biopolymer on earth after chitin and has been extensively explored for preparation of versatile drug delivery systems. The presence of two distinct reactive functional groups (an amino group at C2, and a primary and secondary hydroxyl group at C3 and C6) of chitosan are involved in the transformation of expedient derivatives such as acylated, alkylated, carboxylated, quaternized and esterified chitosan. Amongst these, quaternized chitosan is preferred in pharmaceutical industries owing to its prominent features including superior water solubility, augmented antimicrobial actions, modified wound healing, pH-sensitive targeting, biocompatibility, and biodegradability. It has been explored in a large realm of pharmaceuticals, cosmeceuticals, and the biomedical arena. Immense classy drug delivery systems containing quaternized chitosan have been intended for tissue engineering, wound healing, gene, and vaccine delivery. This review article outlines synthetic techniques, basic characteristics, inherent properties, biomedical applications, and ubiquitous challenges associated to quaternized chitosan.

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“…All of the metallic samples were formed following a pyramidal frustum with a square generatrix, a variable wall angle for each depth [ 15 , 16 ], and an incremental vertical step size of 0.25 mm and 0.5 mm, as shown in Figure 2 . As expected, spring-back occurred to recover the metallic sheet, which produced some shape errors in the horizontal and vertical distance between the planned and final part geometry.…”

Section: Materials and Experimental Testsmentioning

confidence: 99%

Study of Friction and Wear Effects in Aluminum Parts Manufactured via Single Point Incremental Forming Process Using Petroleum and Vegetable Oil-Based Lubricants

et al. 2021

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This paper focuses on studying how mineral oil, sunflower, soybean, and corn lubricants influence friction and wear effects during the manufacturing of aluminum parts via the single point incremental forming (SPIF) process. To identify how friction, surface roughness, and wear change during the SPIF of aluminum parts, Stribeck curves were plotted as a function of the SPIF process parameters such as vertical step size, wall angle, and tool tip semi-spherical diameter. Furthermore, lubricant effects on the surface of the formed parts are examined by energy dispersive spectroscopy (EDS) and scanning electron microscope (SEM) images, the Alicona optical 3D measurement system, and Fourier-transform infrared spectroscopy (FTIR). Results show that during the SPIF process of the metallic specimens, soybean and corn oils attained the highest friction, along forces, roughness, and wear values. Based on the surface roughness measurements, it can be observed that soybean oil produces the worst surface roughness finish in the direction perpendicular to the tool passes (Ra =1.45 μm) considering a vertical step size of 0.25 mm with a 5 mm tool tip diameter. These findings are confirmed through plotting SPIFed Stribeck curves for the soybean and corn oils that show small hydrodynamic span regime changes for an increasing sample step-size forming process. This article elucidates the effects caused by mineral and vegetable oils on the surface of aluminum parts produced as a function of Single Point Incremental Sheet Forming process parameters.

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Manufacture and mechanical properties of knee implants using SWCNTs/UHMWPE composites

Cited by 48 publications

References 47 publications

Wear Resistance, Color Stability and Displacement Resistance of Milled PEEK Crowns Compared to Zirconia Crowns under Stimulated Chewing and High-Performance Aging

Wear Resistance, Color Stability and Displacement Resistance of Milled PEEK Crowns Compared to Zirconia Crowns under Stimulated Chewing and High-Performance Aging

Biomedical Applications of Quaternized Chitosan

Study of Friction and Wear Effects in Aluminum Parts Manufactured via Single Point Incremental Forming Process Using Petroleum and Vegetable Oil-Based Lubricants

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