scholarly journals Materials for Hip Prostheses: A Review of Wear and Loading Considerations

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 495 ◽  
Author(s):  
Massimiliano Merola ◽  
Saverio Affatato
Keyword(s):  
Wear Rate ◽  
Hip Joint ◽  
Human Body ◽  
Material Behavior ◽  
Hip Implants ◽  
Hip Prostheses ◽  
Replacement Surgery ◽  
Current State ◽  
Frictional Forces ◽  
Key Aspects

Replacement surgery of hip joint consists of the substitution of the joint with an implant able to recreate the articulation functionality. This article aims to review the current state of the art of the biomaterials used for hip implants. Hip implants can be realized with different combination of materials, such as metals, ceramics and polymers. In this review, we analyze, from international literature, the specific characteristics required for biomaterials used in hip joint arthroplasty, i.e., being biocompatible, resisting heavy stress, opposing low frictional forces to sliding and having a low wear rate. A commentary on the evolution and actual existing hip prostheses is proposed. We analyzed the scientific literature, collecting information on the material behavior and the human-body response to it. Particular attention has been given to the tribological behavior of the biomaterials, as friction and wear have been key aspects to improve as hip implants evolve. After more than 50 years of evolution, in term of designs and materials, the actual wear rate of the most common implants is low, allowing us to sensibly reduce the risk related to the widespread debris distribution in the human body.

A Briefing on the Manufacture of Hip Joint Prostheses

2009 ◽  
Vol 76-78 ◽  
pp. 212-216 ◽  
Author(s):  
Liang Chi Zhang ◽  
E.C.S. Kiat ◽  
Alokesh Pramanik
Keyword(s):  
Hip Joint ◽  
Human Body ◽  
Artificial Materials ◽  
Joint Prostheses ◽  
Key Aspects ◽  
Replacement Operation ◽  
Selection Of

To produce lifelong, harmless hip joint prostheses, considerable cross-disciplinary studies have been carried out. The research includes adaptability and sustainability of artificial materials to human body, selection of materials, precision fabrication and efficient replacement operation. This paper provides a brief review of some of these key aspects with some details in abrasive polishing.

scholarly journals HIP Action

2004 ◽  
Vol 126 (12) ◽  
pp. 40-43
Author(s):  
John DeGaspari
Keyword(s):  
Hip Replacement ◽  
Hip Prosthesis ◽  
Scratch Resistance ◽  
Hip Implants ◽  
Ion Release ◽  
Hip Prostheses ◽  
Wear Rates ◽  
Replacement Surgery ◽  
Hip Replacement Surgery ◽  
Elderly Recipients

The success of hip implants with elderly recipients has encouraged surgeons to increasingly perform hip replacement surgery on younger, more active patients as well. The condition that causes hip prostheses to loosen is known as osteolysis. While the problem affects only a relatively small set of recipients now, it may well grow as hip replacement surgery encompasses a wider range of eligible patients. A research group at the University of Leeds in the United Kingdom says it has patented a ceramic-on-metal hip prosthesis that produces one-tenth the wear particles of currently available hip replacement joints. The prosthesis has been licensed to a prosthetic manufacturer and is about to enter clinical trials in Europe. Some companies produce highly cross-linked polyethylene, either by thermal treatment or by radiation. Stryker Orthopaedics has Crossfire hip implants using highly cross-linked polyethylene cups against a metal ball. The company developed a ceramic-on-ceramic joint replacement, which it commercialized in 2003. The new Trident joint uses bearing surfaces of alumina ceramic. The company claims it has scratch resistance, low wear rates, good wettability for lubrication, and no ion release.

scholarly journals The Analysis of Polyethylene Hip Joint Endoprostheses Strength Parameters Changes after Use inside the Human Body

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7091
Author(s):  
Arkadiusz Szarek ◽  
Przemysław Postawa ◽  
Tomasz Stachowiak ◽  
Piotr Paszta ◽  
Joanna Redutko ◽  
...  
Keyword(s):  
Motor Activity ◽  
Hip Joint ◽  
Human Body ◽  
The Elderly ◽  
Operating Conditions ◽  
Strength Parameters ◽  
Hip Prostheses ◽  
Amorphous Phases ◽  
Hip Diseases ◽  
Human Motor

The influence of dynamic loads resulting from human motor activity and electrocorrosion inside the human body on the strength parameters of artificial joint elements has not yet been investigated. Hip joint arthroplasty is the most common surgical procedure in the world that allows doctors to remove pain and restore motor skills in people with severe hip diseases, after accidents, and in the elderly. Based on the reports, this article assesses changes in the number of implanted endoprostheses in the years 2005–2019 and determines the trends and estimated changes in the number of implanted hip prostheses in the following decades. The study assesses changes in selected strength parameters of UHMW-PE polyethylene inserts of hip joint endoprostheses during their use in the human body. The research was carried out on appropriately collected samples from UHMW-PE cups removed from the human body with a known history and lifetime from 4 to 10 years. Patients’ body weight ranged from 735 [N] to 820 [N], and the declared physical activity was similar in the entire research group. As part of the research, the values of changes in dynamic modules and the mechanical loss coefficient were determined in relation to the share of the crystalline and amorphous phases of artificial UHMW-PE cups, removed from the human body after different periods of exploitation under similar operating conditions. The analysis of selected strength parameters was performed at a temperature of 40 °C, which corresponds to the working conditions inside the human body. On the basis of numerical studies, the influence of changes in material parameters on the deformation of the artificial acetabulum during the patient’s motor activity, which is one of the causes of fatigue destruction, was determined.

The current state of the question of the "reaction" of fluids of the human body

2021 ◽  
Vol 20 (4) ◽  
pp. 411-420
Author(s):  
L. B. Wagner
Keyword(s):  
Human Body ◽  
Current State ◽  
Physico Chemical ◽  
The World ◽  
Diagnostics And Therapy

The question of the "reaction" of the fluids of the human body is not entirely new, but only in the last few years, mainly during the war years, it has attracted the general attention of biologists, physiologists and doctors around the world. Only now are more or less broad prospects emerging, which the development of this question promises for physiology, diagnostics, and therapy. Therefore, I ask the reader to arm yourself with patience in order to overcome the preliminary physico-chemical part of this review.

Delinquenzabbruch — Hauptaspekte des gegenwärtigen Forschungsstandes / Criminal Desistance — Key aspects from the current state of research

2016 ◽  
Vol 99 (2) ◽  
Author(s):  
Klaus Boers ◽  
Anna Mareike Herlth
Keyword(s):  
Current State ◽  
Criminal Desistance ◽  
State Of Research ◽  
Key Aspects

ZusammenfassungDie Annahme, dass die meisten Intensivtäter bis ins hohe Erwachsenenalter hinein aktiv bleiben, prägte in den 1980er und 1990er Jahren erneut die kriminologische Verlaufsforschung. Jedoch leiteten die 1993 von Laub und Sampson veröffentlichten Reanalysen der Gluecks- Daten, nach denen auch die meisten persistenten Delinquenzverläufe ab dem frühen Erwachsenenalter abgebrochen wurden, einen Paradigmenwechsel ein. Seitdem entwickelte sich der Delinquenzabbruch zu einem zentralen Bereich der kriminologischen Verlaufsforschung, der auch für die Kriminalpraxis sehr bedeutsam wurde. Denn es ist erfolgversprechender, einen künftigen Delinquenzabbruch zu unterstützen, als Ursachen anzugehen, die in der Regel vor dem Beginn der spätestens im Jugendalter einsetzenden Intensivdelinquenz liegen. Die meist empirisch untermauerte Diskussion um die Bedingungen des Delinquenzabbruchs drehte sich zunächst um den Vorrang entweder struktureller (Partnerbeziehungen, Arbeit) oder subjektiver (Wende zu einem konformen Selbstkonzept) Erklärungen. Sie konzentriert sich aktuell auf Konzeptionen, die diese beiden Aspekte integrieren. Neben solchen ätiologischen Ansätzen werden die einen Delinquenzabbruch eher erschwerenden formellen Kontrollinterventionen erst in neuerer Zeit stärker in den Blick genommen.

Computational simulation of wear rate and heat generation on a hip joint

2006 ◽  
Vol 39 ◽  
pp. S529
Author(s):  
P.R. Fernandes ◽  
J. Fialho ◽  
J. Folgado ◽  
L. Eça
Keyword(s):  
Wear Rate ◽  
Heat Generation ◽  
Hip Joint ◽  
Computational Simulation

scholarly journals Recent Patents and Designs on Hip Replacement Prostheses

2015 ◽  
Vol 9 (1) ◽  
pp. 92-102 ◽  
Author(s):  
H Derar ◽  
M Shahinpoor
Keyword(s):  
Robotic Surgery ◽  
Smart Materials ◽  
Hip Replacement ◽  
Surgical Techniques ◽  
Hip Prostheses ◽  
Replacement Surgery ◽  
Hip Replacement Surgery ◽  
The Past ◽  
Made In

Hip replacement surgery has gone through tremendous evolution since the first procedure in 1840. In the past five decades the advances that have been made in technology, advanced and smart materials innovations, surgical techniques, robotic surgery and methods of fixations and sterilization, facilitated hip implants that undergo multiple design revolutions seeking the least problematic implants and a longer survivorship. Hip surgery has become a solution for many in need of hip joint remedy and replacement across the globe. Nevertheless, there are still long-term problems that are essential to search and resolve to find the optimum implant. This paper reviews several recent patents on hip replacement surgery. The patents present various designs of prostheses, different materials as well as methods of fixation. Each of the patents presents a new design as a solution to different issues ranging from the longevity of the hip prostheses to discomfort and inconvenience experienced by patients in the long-term.

Total hip arthroplasty in skeletal dysplasia

2003 ◽  
Vol 13 (3) ◽  
pp. 177-183 ◽  
Author(s):  
S.I.M. Umarji ◽  
M.B. Lee ◽  
M.F. Gargan ◽  
N.M.A. Portinaro ◽  
I.D. Learmonth
Keyword(s):  
Revision Surgery ◽  
Juvenile Chronic Arthritis ◽  
Chronic Arthritis ◽  
Developmental Dysplasia ◽  
Harris Hip Score ◽  
Hip Prostheses ◽  
Replacement Surgery ◽  
Hip Replacement Surgery ◽  
The Mean

This study presents the results of 38 hip prostheses in 24 people of short stature (under 152 cm). A retrospective clinical and radiological study recording the diagnosis, age at reconstruction, height, weight, type of prostheses, length of follow-up, radiological appearances and patient satisfaction was performed. Harris hip scores were used to assess activities of daily living (1). All patients were under 152cm and their diagnoses included achondroplasia, spondyloepiphyseal dysplasia, multiple epiphyseal dysplasia, developmental dysplasia of the hip and juvenile chronic arthritis. The mean height of these patients was 135 cm (range: 109cm to 150cm). The mean age was 38 years (range: 19 to 75 years) with mean follow-up 67 months (range: 12 to 406 months). Only one patient, who is now aged 69 years (though 65 years at revision surgery), has required revision surgery to date. The results were excellent for 33 hips (Harris hip score between 80–100), good in three (Harris hip score between 70–80), satisfactory in one (score 60–70) and poor for one (Harris hip score <50). The mean Harris hip score to date is 89. Hip replacement surgery is difficult in this challenging group of patients but can nonetheless yield gratifying results in over 90% of cases.

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