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Artykuły w czasopismach na temat „Polyethylene insert”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Huang, Chang-Hung, Yung-Chang Lu, Lin-I. Hsu, Jiann-Jong Liau, Ting-Kuo Chang, and Chun-Hsiung Huang. "Effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis." Bone & Joint Research 9, no. 11 (2020): 768–77. http://dx.doi.org/10.1302/2046-3758.911.bjr-2020-0019.r2.

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Aims The material and design of knee components can have a considerable effect on the contact characteristics of the tibial post. This study aimed to analyze the stress distribution on the tibial post when using different grades of polyethylene for the tibial inserts. In addition, the contact properties of fixed-bearing and mobile-bearing inserts were evaluated. Methods Three different grades of polyethylene were compared in this study; conventional ultra high molecular weight polyethylene (UHMWPE), highly cross-linked polyethylene (HXLPE), and vitamin E-stabilized polyethylene (VEPE). In addi

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Cottom, James M., Steven M. Douthett, Kelly K. McConnell, and Britton S. Plemmons. "The Relationship Between Polyethylene Insert Size and Complications in Total Ankle Replacement." Foot & Ankle Specialist 12, no. 3 (2018): 253–57. http://dx.doi.org/10.1177/1938640018787044.

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The purpose of this study was to compare complication rates after total ankle replacement in 2 groups of patients based on polyethylene insert size. The total cohort was divided into 2 groups based on insert size. Group 1 included patients with polyethylene insert size less than 10 mm in thickness. Group 2 included patients with polyethylene insert sizes 10 mm and larger. Available charts were reviewed for patients who underwent primary total ankle arthroplasty by one surgeon. Patient demographics, polyethylene insert size, implant used, concomitant procedures, postoperative complications, and

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Takemura, S., Y. Minoda, R. Sugama, et al. "Comparison of a vitamin E-infused highly crosslinked polyethylene insert and a conventional polyethylene insert for primary total knee arthroplasty at two years postoperatively." Bone & Joint Journal 101-B, no. 5 (2019): 559–64. http://dx.doi.org/10.1302/0301-620x.101b5.bjj-2018-1355.r1.

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AimsThe use of vitamin E-infused highly crosslinked polyethylene (HXLPE) in total knee prostheses is controversial. In this paper we have compared the clinical and radiological results between conventional polyethylene and vitamin E-infused HXLPE inserts in total knee arthroplasty (TKA).Patients and MethodsThe study included 200 knees (175 patients) that underwent TKA using the same total knee prostheses. In all, 100 knees (77 patients) had a vitamin E-infused HXLPE insert (study group) and 100 knees (98 patients) had a conventional polyethylene insert (control group). There were no significan

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Kahlenberg, Cynthia A., Erin E. Berube, William Xiang, et al. "Posterior-stabilized versus mid-level constraint polyethylene components in total knee arthroplasty." Bone & Joint Open 4, no. 6 (2023): 432–41. http://dx.doi.org/10.1302/2633-1462.46.bjo-2023-0023.r1.

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AimsMid-level constraint designs for total knee arthroplasty (TKA) are intended to reduce coronal plane laxity. Our aims were to compare kinematics and ligament forces of the Zimmer Biomet Persona posterior-stabilized (PS) and mid-level designs in the coronal, sagittal, and axial planes under loads simulating clinical exams of the knee in a cadaver model.MethodsWe performed TKA on eight cadaveric knees and loaded them using a robotic manipulator. We tested both PS and mid-level designs under loads simulating clinical exams via applied varus and valgus moments, internal-external (IE) rotation m

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Currier, John H., Barbara H. Currier, Matthew P. Abdel, Daniel J. Berry, Alexander J. Titus, and Douglas W. Van Citters. "What factors drive polyethylene wear in total knee arthroplasty?" Bone & Joint Journal 103-B, no. 11 (2021): 1695–701. http://dx.doi.org/10.1302/0301-620x.103b11.bjj-2020-2334.r1.

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Aims Wear of the polyethylene (PE) tibial insert of total knee arthroplasty (TKA) increases the risk of revision surgery with a significant cost burden on the healthcare system. This study quantifies wear performance of tibial inserts in a large and diverse series of retrieved TKAs to evaluate the effect of factors related to the patient, knee design, and bearing material on tibial insert wear performance. Methods An institutional review board-approved retrieval archive was surveyed for modular PE tibial inserts over a range of in vivo duration (mean 58 months (0 to 290)). Five knee designs, t

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de Ridder, Ruud, Bart L. Kaptein, Bart G. Pijls, Rob G. H. H. Nelissen, and Herman H. Kaptijn. "Five-year migration and insert wear of uncemented tibial components with either conventional polyethylene or sequentially annealed highly crosslinked polyethylene inserts: a blinded randomized controlled trial using radiostereometric analysis." Bone & Joint Journal 105-B, no. 5 (2023): 518–25. http://dx.doi.org/10.1302/0301-620x.105b5.bjj-2022-0986.r1.

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AimsThe primary objective of this study was to compare the five-year tibial component migration and wear between highly crosslinked polyethylene (HXLPE) inserts and conventional polyethylene (PE) inserts of the uncemented Triathlon fixed insert cruciate-retaining total knee arthroplasty (TKA). Secondary objectives included clinical outcomes and patient-reported outcome measures (PROMs).MethodsA double-blinded, randomized study was conducted including 96 TKAs. Tibial component migration and insert wear were measured with radiostereometric analysis (RSA) at three, six, 12, 24, and 60 months post

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Koh, Yong-Gon, Jin-Ah Lee, Hwa-Yong Lee, Hyo-Jeong Kim, and Kyoung-Tak Kang. "Computational wear prediction of insert conformity and material on mobile-bearing unicompartmental knee arthroplasty." Bone & Joint Research 8, no. 11 (2019): 563–69. http://dx.doi.org/10.1302/2046-3758.811.bjr-2019-0036.r1.

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Objectives Unicompartmental knee arthroplasty (UKA) is an alternative to total knee arthroplasty with isolated medial or lateral compartment osteoarthritis. However, polyethylene wear can significantly reduce the lifespan of UKA. Different bearing designs and materials for UKA have been developed to change the rate of polyethylene wear. Therefore, the objective of this study is to investigate the effect of insert conformity and material on the predicted wear in mobile-bearing UKA using a previously developed computational wear method. Methods Two different designs were tested with the same fem

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Kolesnik, A. I., N. S. Gavryushenko, V. G. Bulgakov, E. B. Frolov, and L. V. Fomin. "Influence of Inclination Angle on the Polyethylene Insert Wear in Experimental Module of Hip Endoprosthesis." Vestnik travmatologii i ortopedii imeni N.N. Priorova, no. 4 (December 30, 2016): 60–65. http://dx.doi.org/10.32414/0869-8678-2016-4-60-65.

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Localization and the area of polyethylene insert wear in friction pair ofthe experimental module of hip joint (HJ) endoprosthesis was studied under laboratory dynamic conditions simulating its biomechanics at HJ external rotation contracture. It was stated that localization and the area of wear depended on the angle of horizontal inclination infriction pair of HJ endoprosthesis. Almost the same areas of polyethylene wear in anterior and posterior insert segments were observed when inclination angle was equal to that of the hip joint. Reduction of inclination angle resulted in the increase of w

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Kolesnik, A. I., N. S. Gavryushenko, V. G. Bulgakov, E. B. Frolov, and L. V. Fomin. "Influence of Inclination Angle on the Polyethylene Insert Wear in Experimental Module of Hip Endoprosthesis." N.N. Priorov Journal of Traumatology and Orthopedics 23, no. 4 (2016): 60–65. http://dx.doi.org/10.17816/vto201623460-65.

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Localization and the area of polyethylene insert wear in friction pair ofthe experimental module of hip joint (HJ) endoprosthesis was studied under laboratory dynamic conditions simulating its biomechanics at HJ external rotation contracture. It was stated that localization and the area of wear depended on the angle of horizontal inclination infriction pair of HJ endoprosthesis. Almost the same areas of polyethylene wear in anterior and posterior insert segments were observed when inclination angle was equal to that of the hip joint. Reduction of inclination angle resulted in the increase of w

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Pritchett, James W. "Total Articular Knee Replacement Using Polyurethane." Journal of Knee Surgery 33, no. 03 (2019): 242–46. http://dx.doi.org/10.1055/s-0039-1677816.

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AbstractThis study reviewed the early use of polyurethane for total knee resurfacing, the long-term results of polycarbonate urethane (PCU) for total knee replacement and conducted wear simulator testing of PCU. In 1959 and 1960, 10 patients underwent total articular polyurethane knee replacement (polyethylene was not available). The polyurethane was placed on the articular surface of the femur with metal surfaces on the tibia and patella. In 1996 and 1997, four patients received a newer PCU tibial insert in revision procedures; all had well-fixed prostheses, but no revision polyethylene impla

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11

Teeter, Matthew G., James P. McAuley, and Douglas D. Naudie. "Fracture of Two Moderately Cross-Linked Polyethylene Tibial Inserts in a TKR Patient." Case Reports in Orthopedics 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/491384.

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Highly cross-linked polyethylene has become the gold standard in total hip replacement for its wear resistance. Moderately crosslinked polyethylene is now available for total knee replacement (TKR), although concerns about reduced mechanical strength have prevented widespread adoption. The purpose of this report is to describe an unusual case where a patient underwent cruciate retaining TKR using a moderately crosslinked polyethylene tibial insert that went on to fracture twice in the same location across the primary and first revision surgery. The first tibial insert was 10 mm thick and was i

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12

Anuar, Mohd Afzan Mohd, Abdul Raazak Sabi, Solehuddin Shuib, Abdul Halim Abdullah, and Mohd Fairudz Mohd Miswan. "Effect of Geometrical Designs on Mechanics of Unicompartmental Knee Arthroplasty (UKA): A Finite Element Study." International Journal of Emerging Technology and Advanced Engineering 12, no. 6 (2022): 84–91. http://dx.doi.org/10.46338/ijetae0622_12.

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— Unicompartmental knee arthroplasty (UKA) is a surgical method used to treat osteoarthritis in one portion of the knee, most often the medial compartment. UKA supporters argued that the procedure more closely replicates natural knee kinematics, results in reduced perioperative morbidity and intraoperative blood loss, and allows for quicker mobility and rehabilitation than traditional bicondylar knee arthroplasty. The goal of this study is to look at the impact of implant design on the mechanics of unicompartmental knee arthroplasty (UKA). 3D models of the UKA implant were modified from three

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Li, Michelle Kar Lam, Lawrence Chun Man Lau, Yuk Wah Hung, Ka Bon Kwok, Alexander Pak Hin Chan, and Jason Chi Ho Fan. "Enhanced patella tracking in rotating platform total knee replacements, friend or foe? A case of iliotibial band impingement by rotating polyethylene insert." Journal of Orthopaedics, Trauma and Rehabilitation 26, no. 2 (2019): 99–104. http://dx.doi.org/10.1177/2210491719859594.

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Rotating platform total knee replacement implants have been marketed to allow more precise approximation of normal knee kinematics and enhance patella tracking. At liberty of rotation, the distinct mobile polyethylene insert design does have its pitfalls in spite of purported merits. We report a case of lateral knee pain following rotating platform total knee replacement, attributable to iliotibial band impingement by the rotating polyethylene insert. Prompt treatment via arthroscopic release circumvented a traumatic and costly revision procedure.

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Marinescu, Rodica, Dan Laptoiu, Izabela-Cristina Stancu, and Cristina Busuioc. "Late Failure of a Polyethylene Unicompartmental Knee Insert -Retrieval Analysis Protocol and Results." Materiale Plastice 58, no. 4 (2022): 187–96. http://dx.doi.org/10.37358/mp.21.4.5544.

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This study reports the investigation of a degraded polyethylene insert retrieved after the catastrophic failure of a mobile bearing knee implant, occurred after a traumatic event and leading to a late revision. Understanding wear mechanisms of polyethylene components is important to improve the implants for joint replacement. This model of unicompartmental arthroplasty, due to its mobile, congruent insert and design, has the potential to attain low rates of wear, leading to an improved survival of the prosthesis over fixed-bearing knee implants. During the surgical technique, however, it is cr

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Abdulla, Irfan, Daniel G. Langohr, Joshua W. Giles, James A. Johnson, and George S. Athwal. "The effect of humeral polyethylene insert constraint on reverse shoulder arthroplasty biomechanics." Shoulder & Elbow 10, no. 1 (2017): 25–31. http://dx.doi.org/10.1177/1758573217701065.

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Background There is little information on the effects of altering reverse shoulder arthroplasty (RSA) polyethylene constraint on joint load, load angle and deltoid force. The present biomechanical study aimed to investigate the effects of changing RSA polyethylene constraint on joint load, load angle, deltoid force and range of motion. Methods A custom RSA implant capable of measuring forces across the joint with varying polyethylene constraint was tested in six cadaveric shoulders. Standard-, low- and high-constraint (retentive) polyethylene liners were tested, and joint kinematics, loads and

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Tzanetis, Periklis, Marco A. Marra, René Fluit, Bart Koopman, and Nico Verdonschot. "Biomechanical Consequences of Tibial Insert Thickness after Total Knee Arthroplasty: A Musculoskeletal Simulation Study." Applied Sciences 11, no. 5 (2021): 2423. http://dx.doi.org/10.3390/app11052423.

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The thickness of the tibial polyethylene (PE) insert is a critical parameter to ensure optimal soft-tissue balancing in the intraoperative decision-making procedure of total knee arthroplasty (TKA). However, there is a paucity of information about the kinetic response to PE insert thickness variations in the tibiofemoral (TF) joint, and subsequently, the secondary effects on the patellofemoral (PF) biomechanics. Therefore, the purpose of this study was to investigate the influence of varying PE insert thickness on the ligament and TF compressive forces, as well as on the PF forces and kinemati

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Valič, Matej, Ingrid Milošev, Vesna Levašič, et al. "Linear and Volumetric Polyethylene Wear Patterns after Primary Cruciate-Retaining Total Knee Arthroplasty Failure: An Analysis Using Optical Scanning and Computer-Aided Design Models." Materials 17, no. 20 (2024): 5007. http://dx.doi.org/10.3390/ma17205007.

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(1) Background: Analyses of retrieved inserts allow for a better understanding of TKA failure mechanisms and the detection of factors that cause increased wear. The purpose of this implant retrieval study was to identify whether insert volumetric wear significantly differs among groups of common causes of total knee arthroplasty failure, whether there is a characteristic wear distribution pattern for a common cause of failure, and whether nominal insert size and component size ratio (femur-to-insert) influence linear and volumetric wear rates. (2) Methods: We digitally reconstructed 59 retriev

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Sarac, Helbig, Dräger, and Jost-Brinkmann. "A Comparative Study of Shock Absorption Capacities of Custom Fabricated Mouthguards using a Triangulation Sensor." Materials 12, no. 21 (2019): 3535. http://dx.doi.org/10.3390/ma12213535.

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This in-vitro study compares the shock absorption qualities of five mouthguard designs measured with a triangulation laser sensor during small hard object collisions. The aim was to investigate the impact of different labial designs on mouthguard performance. Methods: Five different custom-fabricated ethylene vinyl acetate (EVA) types of mouthguards with varying thickness and different labial inserts (polyethylene terephthalate glycol-modified (PETG), nylon mesh, air space) were tested with a triangulation laser sensor during different energy blows, generated with a pendulum testing device. Th

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Nunez, Leah, Brandon Broome, Tom Pace, and Melinda Harman. "Treatment for Wear and Osteolysis in Well-Fixed Uncemented TKR." ISRN Orthopedics 2013 (February 11, 2013): 1–6. http://dx.doi.org/10.1155/2013/398298.

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Background. Traditionally, osteolysis around total knee replacements (TKRs) is treated with complete revision. In certain subsets, polyethylene insert exchange and bone grafting may be applicable. This study reports the clinical outcomes for selective bone grafting in patients with osteolysis without complete revision of the TKR. Methods. This retrospective study analyzes 10 TKRs (9 patients, 66.5 ± 6.1 years old) presenting with osteolysis and revised after 8.7 ± 1.9 years of in vivo function. At index TKR, all patients were implanted with uncemented prosthesis and modular polyethylene insert

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Schipper, Oliver N., Mehul A. Dharia, Justin S. Hertzler, and Jeffrey E. Bischoff. "Fatigue Strength of Highly Crosslinked Polyethylene in Total Ankle Arthroplasty." Foot & Ankle Orthopaedics 4, no. 4 (2019): 2473011419S0037. http://dx.doi.org/10.1177/2473011419s00373.

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Category: Ankle Introduction/Purpose: Highly crosslinked polyethylene (HXLPE) was developed for its superior wear properties in comparison to conventional polyethylene (CPE). The higher dose irradiation required for HXLPE may also cause embrittlement, which reduces fatigue resistance and leads to surface cracking or fracture of the polyethylene bearing. Concern over fatigue resistance has prevented widespread adoption of HXLPE for use in in total ankle arthroplasty (TAA). The aim of this study was to determine whether HXLPE has sufficient fatigue strength for total ankle arthroplasty under sim

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Brockett, Claire L., Silvia Carbone, John Fisher, and Louise M. Jennings. "Influence of conformity on the wear of total knee replacement: An experimental study." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 232, no. 2 (2017): 127–34. http://dx.doi.org/10.1177/0954411917746433.

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Wear of total knee replacement continues to be a significant factor influencing the clinical longevity of implants. Historically, failure due to delamination and fatigue directed design towards more conforming inserts to reduce contact stress. As new generations of more oxidatively stable polyethylene have been developed, more flexibility in bearing design has been introduced. The aim of this study was to investigate the effect of insert conformity on the wear performance of a fixed bearing total knee replacement through experimental simulation. Two geometries of insert were studied under stan

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Ho, S. P., L. Riester, M. Drews, T. Boland, and M. LaBerge. "Nanoindentation properties of compression-moulded ultra-high molecular weight polyethylene." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 217, no. 5 (2003): 357–66. http://dx.doi.org/10.1243/095441103770802522.

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This paper investigates the elastic modulus and hardness of untreated and treated compression-moulded ultra-high molecular weight polyethylene (UHMWPE) tibial inserts of a total knee replacement (TKR) prosthesis. Investigations were carried out at a nanoscale using a Nanoindenter™ at penetration depths of 100, 250 and 500 nm. The nanomechanical properties of surface and subsurface layers of the compression-moulded tibial inserts were studied using the untreated UHMWPE. The nanomechanical properties of intermediate and core layers of the compression-moulded tibial insert were studied using the

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Plummer, Christopher M., Houbo Zhou, Sihan Li, et al. "A direct functionalization of polyolefins for blend compatibilization by an insertion of 1,1-bis(phenylsulfonyl)ethylene (BPSE)." Polymer Chemistry 10, no. 24 (2019): 3325–33. http://dx.doi.org/10.1039/c9py00599d.

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Ahmed, Adnan, and Naveed Akmal Din. "Simulation of Accelerated Ageing Conditions on Ballistic Resistance of Dyneema® Polyethylene Composites." Materials Science Forum 1041 (August 4, 2021): 23–27. http://dx.doi.org/10.4028/www.scientific.net/msf.1041.23.

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The main aim of this paper is to study and analyze methods of predicting the serviceability and lifespan of ballistic armors made of a high-strength polyethylene ultra-high molecular weight (UHMWPE) fibers composites. Experimental tests were conducted on the accelerated use of composite ballistic inserts in lab to predict the durability; changes in the ballistic, physical, and mechanical properties occurring due to accelerated conditions of use. Data of following ageing simulation methods under controlled environment was used. 1-Application of mechanical load to the insert, 2-application of me

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Wang, Jian, Da Wang, Qianchao Mao, and Jinnan Chen. "Fabric Insert Injection Molding for the Preparation of Ultra-High Molecular Weight Polyethylene/High-Density Polyethylene Two-Component Self-Reinforced Composites." Polymers 14, no. 20 (2022): 4384. http://dx.doi.org/10.3390/polym14204384.

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The fabric insert injection molding approach can be applied to produce easily recyclable self-reinforced polymer composites (SrCs) whose reinforcement and matrix are from the same polymer. However, the mechanical properties of the SrCs are usually limited due to the poor impregnation of the inserted fabric. In this work, the ultra-high molecular weight polyethylene (UHMWPE) fabrics were used as the insert, and the high-density polyethylene (HDPE) melt was injected to fill the mold cavity and impregnate the fabrics. The UHMWPE/HDPE two-component SrCs were prepared. The large difference of melti

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Astoul Bonorino, Juan Felix, Pablo Ariel Isidoro Slullitel, Gonzalo Rodrigo Kido, Santiago Bongiovanni, Renato Vestri, and Lisandro Carbó. "Traumatic Dislodgement of Tibial Polyethylene Insert after a High-Flex Posterior-Stabilized Total Knee Replacement." Case Reports in Orthopedics 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/810716.

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Many pathologic entities can produce a painful total knee replacement (TKR) that may lead to potential prosthetic failure. Polyethylene insert dissociation from the tibial baseplate has been described most frequently after mobile-bearing and cruciate-retaining TKRs. However, only 3 tibial insert dislocations in primary fixed-bearing High-Flex posterior-stabilized TKRs have been reported. We present a new case of tibial insert dislocation in a High-Flex model that shares similarities and differences with the cases reported, facilitating the analysis of the potential causes, which still remain u

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Ash, H. E., S. C. Scholes, R. Parkin, and A. Unsworth. "Relative movements between Kinemax Plus tibial inserts and the tibial base-plates." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 217, no. 2 (2003): 99–104. http://dx.doi.org/10.1243/09544110360579303.

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Tests were performed on six large Kinemax Plus knee bearings (snap-fit design) to evaluate the amount of movement between 10- and 15-mm-thick tibial inserts and the tibial base plates. The knee bearings were tested up to 1 × 106 cycles on the Durham six-station knee wear simulator which subjected the bearings to similar motion and loading profiles that would be experienced by the natural knee during walking. Although passive internal/external (I/E) rotation was allowed, no active I/E rotation was applied. The movement of the tibial inserts was measured with dial gauges (accuracy ±0.01 mm) befo

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Gibon, Emmanuel, Jacquelyn A. Knapik, and Hari K. Parvataneni. "Massive Osteolysis in a Modern Total Knee Prosthesis." Case Reports in Orthopedics 2021 (October 20, 2021): 1–7. http://dx.doi.org/10.1155/2021/5507932.

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Case. An 82-year-old woman underwent right total knee replacement with a sequentially irradiated and annealed highly cross-linked polyethylene insert. At 9 years, she was found to have a massive femoral osteolysis with an impending fracture. Conclusion. This case demonstrates a rare occurrence of massive femoral osteolysis, requiring revision surgery, with a sequentially irradiated and annealed highly cross-linked polyethylene.

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Zhang, Min, Jia-Yu Wang, Jian Su, et al. "Wear Assessment of Tibial Inserts Made of Highly Cross-Linked Polyethylene Supplemented with Dodecyl Gallate in the Total Knee Arthroplasty." Polymers 13, no. 11 (2021): 1847. http://dx.doi.org/10.3390/polym13111847.

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Background: the wear of tibial insert is still one of primary factors leading to failure of total knee arthroplasty (TKA). Dodecyl gallate (DG) has shown improvements in the oxidation stability of highly cross-linked polyethylene (HXLPE). This study aimed to assess the application of HXLPE supplemented with DG (HXLPE-DG) on the tibial insert in TKA concerning the wear resistance and the potential impact on implant fixation; Methods: tibial inserts made of HXLPE-DG were subjected to a 3 million loading-cycle wear test following ISO 14243-1:2009. The loss of mass and wear rate of the tibial inse

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Ahn, Tae Ran, and Ji Young Jeon. "MRI of Migrated Polyethylene Insert of Mobi-C Implant." Radiology 300, no. 3 (2021): 516–17. http://dx.doi.org/10.1148/radiol.2021204734.

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Cheung, Emilie V., John W. Sperling, and Robert H. Cofield. "Polyethylene insert exchange for wear after total shoulder arthroplasty." Journal of Shoulder and Elbow Surgery 16, no. 5 (2007): 574–78. http://dx.doi.org/10.1016/j.jse.2006.12.009.

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Ferenz, Clint C. "Polyethylene insert dislocation in a screw-in acetabular cup." Journal of Arthroplasty 3, no. 3 (1988): 201–4. http://dx.doi.org/10.1016/s0883-5403(88)80016-0.

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Wang, Changjiang, Yuan Guo, Junfen Shi, and Weiyi Chen. "A Numerical Investigation into the Effects of Overweight and Obesity on Total Knee Arthroplasty." Journal of Healthcare Engineering 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/1496379.

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Overweight and obesity increase risks of knee osteoarthritis, which is a major cause of disability. Severe knee osteoarthritis can be treated by knee arthroplasty. Total knee arthroplasty has been used in overweight and obese patients; however, clinical reports showed that the outcome of this group of patients was not good as normal-weight patients. Two computer models were created in this paper to simulate the effect of excess loads on the distal femoral bone and contact pressures in total knee arthroplasty during a gait cycle. The numerical results showed increased stress in periprosthetic d

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Hino, Makoto, Yutaka Mitooka, Koji Murakami, and Teruto Kanadani. "Laser Joining of Metal and Plastic Using Insert Materials." Materials Science Forum 706-709 (January 2012): 2956–61. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.2956.

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Laser joining for dissimilar materials between metals plate and polypropylene plate using a newly developed insert sheet was investigated. It was not possible to join the plate of various metals to the nonpolar plastic plate such as the polypropylene directly under the various laser-irradiation conditions. However, the use of insert sheet held between the metal plate and the polypropylene plate made it possible to join each metal plate to polyethylene plate by laser-irradiation. The joining strength increased with the increase in the input energy by laser-irradiation, and the joining strength

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Baliga, Ravishanker, Sharat K. Rao, Raghuvir Pai, et al. "Periprosthetic bone response to axial loading following TKR." Multidiscipline Modeling in Materials and Structures 16, no. 2 (2019): 359–72. http://dx.doi.org/10.1108/mmms-06-2018-0109.

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Purpose The purpose of this paper is to investigate by means of finite element analysis (FEA), the effect of polyethylene insert thickness and implant material, under axial loading following TKA. Design/methodology/approach The 3D geometric model of bone was processed using the CT scan data by MIMICS (3matic Inc.), package. Implant components were 3D scanned and subsequently 3D modeled using ANSYS Spaceclaim and meshed in Hypermesh (Altair Hyperworks). The assembled, meshed bone-implant model was then input to ABAQUS for FE simulations, considering axial loading. Findings Polyethylene insert t

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Zhang, Xiang, Jiang Ma, Ran Bai, Qian Li, Bing Li Sun, and Chang Yu Shen. "Polymer Micro Hot Embossing with Bulk Metallic Glass Mold Insert." Advanced Materials Research 510 (April 2012): 639–44. http://dx.doi.org/10.4028/www.scientific.net/amr.510.639.

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Polymer microstructures are used more and more in many fields. Hot embossing is one of molding processing to achieve micro polymer components. In this paper, bulk metallic glass was selected as mold material to fabricate mold insert of micro hot embossing. Traditional UV-lithography and ICP-etching were used to achieve micro features on silicon wafer. And then, micro features were transferred from silicon wafer to bulk metallic glass mold insert above its glass transition temperature. Finally, applied bulk metallic glass mold insert to replicate polymer microstructure with hot embossing. Three

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Osano, Kei, Ryuji Nagamine, Mitsugu Todo, and Makoto Kawasaki. "The Effect of Malrotation of Tibial Component of Total Knee Arthroplasty on Tibial Insert during High Flexion Using a Finite Element Analysis." Scientific World Journal 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/695028.

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One of the most common errors of total knee arthroplasty procedure is a malrotation of tibial component. The stress on tibial insert is closely related to polyethylene failure. The objective of this study is to analyze the effect of malrotation of tibial component for the stress on tibial insert during high flexion using a finite element analysis. We used Stryker NRG PS for analysis. Three different initial conditions of tibial component including normal, 15° internal malrotation, and 15° external malrotation were analyzed. The tibial insert made from ultra-high-molecular-weight polyethylene w

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Wang, Jian, Dongjie Chen, Sui Wang, Ziran Du, Nannan Jiang, and Jiong Peng. "Insert injection molding of low-density polyethylene single-polymer composites reinforced with ultrahigh-molecular-weight polyethylene fabric." Journal of Thermoplastic Composite Materials 31, no. 8 (2017): 1013–28. http://dx.doi.org/10.1177/0892705717734593.

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Low-density polyethylene single-polymer composites (SPCs) reinforced with sandwiched ultrahigh-molecular-weight polyethylene woven fabric were prepared by insert injection molding. The process combines aesthetic and processing advantages. A processing temperature window (135–155°C) of a very short cycle time (less than 30 s) could be realized. The mechanical properties and morphologies of the samples were evaluated. The results suggested that the polyethylene SPCs were prepared successfully with concurrent increases in flexural strength (∼57%), tensile strength (∼164%), and impact strength (∼6

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Lee, Dhong-Won, Hyuk-Jin Jang, Man-Soo Kim, Keun-Young Choi, Sung-An Hong, and Yong In. "Can a Total Knee System Providing 1 mm Increment of Polyethylene Insert Thickness Offer a Clinical Benefit?" Medicina 60, no. 2 (2024): 322. http://dx.doi.org/10.3390/medicina60020322.

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Background and Objectives: The purpose of this study was to compare clinical outcomes and polyethylene (PE) insert thickness between total knee arthroplasty (TKA) systems providing 1 mm and 2 mm increments. Materials and Methods: In this randomized controlled trial, 50 patients (100 knees) undergoing same-day or staggered bilateral TKA were randomized to receive a TKA system providing 1 mm increments in one knee (1 mm group) and a TKA system providing 2 mm increments in the other knee (2 mm group). At 2 years postoperatively, Knee Society Score (KSS), Western Ontario and McMaster Universities

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Tetreault, Matthew W., Jeremy T. Hines, Daniel J. Berry, Mark W. Pagnano, Robert T. Trousdale, and Matthew P. Abdel. "Isolated tibial insert exchange in revision total knee arthroplasty." Bone & Joint Journal 103-B, no. 6 (2021): 1103–10. http://dx.doi.org/10.1302/0301-620x.103b6.bjj-2020-1954.r2.

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Aims This study aimed to determine outcomes of isolated tibial insert exchange (ITIE) during revision total knee arthroplasty (TKA). Methods From 1985 to 2016, 270 ITIEs were performed at one institution for instability (55%, n = 148), polyethylene wear (39%, n = 105), insert fracture/dissociation (5%, n = 14), or stiffness (1%, n = 3). Patients with component loosening, implant malposition, infection, and extensor mechanism problems were excluded. Results Survivorship free of any re-revision was 68% at ten years. For the indication of insert wear, survivorship free of any re-revision at ten y

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Kerschbaumer, Roman Christopher, Silvester Bolka, Teja Pesl, Ivica Duretek, and Thomas Lucyshyn. "The Relationship between a Defined Microstructure within the Mold Surface and the Corresponding Roughness on the Part: A Systematic Study on Particle Size, Filler-, and Compatibilizer Content." Polymers 13, no. 16 (2021): 2757. http://dx.doi.org/10.3390/polym13162757.

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The perception of a surface and its haptic properties are significantly influenced by roughness and microstructure, respectively, whereby non-negligible parameters include friction, contact area, temperature, and humidity between the human finger and the examined surface. In particular, for a scientific investigation on haptic influences, the production of samples with a defined surface roughness is indispensable. The aim of this study is to analyze the impact of various mold insert roughnesses combined with the influences of particle size, filler-, and compatibilizer content on impression qua

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Katsimihas, M., G. Katsimihas, M. B. Lee, and I. D. Learmonth. "Analysis of the Factors that Predispose to Wear with a 32mm Femoral Head at 5–15 Year follow-up: Clinical and Radiographic Assessment of the Harris-Galante cup at 5–15 Year follow-up." HIP International 13, no. 2 (2003): 65–73. http://dx.doi.org/10.1177/112070000301300202.

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The clinical and radiographic features of 109 consecutive hybrid total hip replacements performed between 1986 and 1992 in 96 patients were retrospectively reviewed. A cementless Harris-Galante (HGP1) cup and a 32mm monobloc straight Muller stem were used in all cases. At an average 10.11 (range 5 to 15) years following surgery, the excellent durability of fixation of the Harris-Galante cup has been demonstrated with only one cup (0.9%) revised for periacetabular osteolysis and aseptic loosening. The prevalence of polyethylene wear was 27.4%. The mean annual linear wear rate was 0.063mm (range

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Andersen, Mikkel Rathsach, Nikolaj Winther, Thomas Lind, Henrik SchrøDer, Gunnar Flivik, and Michael Mørk Petersen. "Monoblock versus modular polyethylene insert in uncemented total knee arthroplasty." Acta Orthopaedica 87, no. 6 (2016): 607–14. http://dx.doi.org/10.1080/17453674.2016.1233654.

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Carr, Seann, Julie C. Sandwell, Pamela Pulido, Michelle L. Munro, Kace A. Ezzet, and Clifford W. Colwell. "Outcomes of Tibial Insert Polyethylene Exchange after Total Knee Arthroplasty." Journal of Arthroplasty 24, no. 2 (2009): e50. http://dx.doi.org/10.1016/j.arth.2008.11.064.

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Teeter, Matthew G., Douglas D. R. Naudie, Jaques S. Milner, and David W. Holdsworth. "Determination of Reference Geometry for Polyethylene Tibial Insert Wear Analysis." Journal of Arthroplasty 26, no. 3 (2011): 497–503. http://dx.doi.org/10.1016/j.arth.2010.01.096.

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Stiehl, James Bowen, and Mohammed R. Mahfouz. "Catastrophic Failure of a Modular Revision Total Hip Polyethylene Insert." Journal of Arthroplasty 22, no. 1 (2007): 143–47. http://dx.doi.org/10.1016/j.arth.2006.02.077.

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Wimmer, Markus A., Michel P. Laurent, Jeannie D. Haman, Joshua J. Jacobs, and Jorge O. Galante. "Surface Damage Versus Tibial Polyethylene Insert Conformity: A Retrieval Study." Clinical Orthopaedics and Related Research® 470, no. 7 (2012): 1814–25. http://dx.doi.org/10.1007/s11999-012-2274-y.

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Willson, Seann E., Michelle L. Munro, Julie C. Sandwell, Kace A. Ezzet, and Clifford W. Colwell. "Isolated Tibial Polyethylene Insert Exchange Outcomes After Total Knee Arthroplasty." Clinical Orthopaedics and Related Research® 468, no. 1 (2009): 96–101. http://dx.doi.org/10.1007/s11999-009-1023-3.

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Mao, Qianchao, Tom P. Wyatt, Jinnan Chen, and Jian Wang. "Insert injection molding of high-density polyethylene single-polymer composites." Polymer Engineering & Science 55, no. 11 (2015): 2448–56. http://dx.doi.org/10.1002/pen.24132.

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de Ridder, Ruud, Bart L. Kaptein, Bart G. Pijls, Rob G. H. H. Nelissen, and Herman H. Kaptijn. "Five-year migration of uncemented femoral components in total knee arthroplasty with either highly cross-linked or conventional polyethylene inserts: a blinded randomized controlled trial using radiostereometric analysis." Bone & Joint Journal 106-B, no. 8 (2024): 826–33. http://dx.doi.org/10.1302/0301-620x.106b8.bjj-2023-1429.r1.

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AimsThe aim of this study was to compare the migration of the femoral component, five years postoperatively, between patients with a highly cross-linked polyethylene (HXLPE) insert and those with a conventional polyethylene (PE) insert in an uncemented Triathlon fixed insert cruciate-retaining total knee arthroplasty (TKA). Secondary aims included clinical outcomes and patient-reported outcome measures (PROMs). We have previously reported the migration and outcome of the tibial components in these patients.MethodsA double-blinded randomized controlled trial was conducted including 96 TKAs. The

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