Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Knee Joint01:23

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...
Issues And Trends In Healthcare Delivery System01:29

Issues And Trends In Healthcare Delivery System

The issues and trends in healthcare delivery are constantly changing. The COVID-19 pandemic is one recent issue that wreaked havoc on healthcare systems, causing a shortage of healthcare workers, high demand for medicines and supplies, and increased medical expenditure due to a lack of insurance. Other issues include rising healthcare costs and care fragmentation.
Cost Containment
Payment for healthcare services has historically promoted adoption of costly and often unnecessary or inefficient...
Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the neck...
Pivot Bearings01:23

Pivot Bearings

In mechanical systems, bearings are crucial in facilitating relative motion between two components while minimizing friction and wear. They help distribute various loads (radial, axial or a combination of both loads) across machinery parts, ensuring smooth and efficient operation.
A pivot bearing is a specialized type of bearing designed to support axial loads on a rotating shaft. The bearing surface, or the pivot, is positioned at the end of a shaft to support the axial thrust. The pivot may...
Ankle Joint01:10

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
Muscles that Move the Leg01:23

Muscles that Move the Leg

The movement of the legs is facilitated by numerous muscles located within the anterior, medial, and posterior compartments of the thigh.
Anterior Compartment
The quadriceps femoris, the most visible muscle of the anterior compartment, is integral for leg extension and thigh flexion. It is formed by merging four distinct muscles — the vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris. The quadriceps tendon, a shared tendon of the four quadriceps muscles, is affixed to...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Relationship between triglyceride-glucose-derived obesity indices and NAFLD in adolescents: A cross-sectional study.

Medicine·2026
Same author

CYP8B1 suppressed by Ras/ERK leads to cholesterol accumulation and bile acids reduction and facilitates hepatic tumorigenesis.

Cancer & metabolism·2026
Same author

Effect of potassium-rich maize (<i>Zea mays</i> L.) straw extract on salt stress mitigation in wheat (<i>Triticum aestivum</i> L.) seedlings.

Frontiers in plant science·2026
Same author

Artesunate directly targeting MMP9 to reduce angiogenesis and increase CD8 + T cell infiltration inhibits hepatocellular carcinoma.

Cancer cell international·2026
Same author

All-endoscopic autologous suspension fixation of semitendinosus tendon and gracilis tendon for insertional chronic Achilles tendon rupture: operative technique and outcomes.

International orthopaedics·2026
Same author

Riboflavin (VB2) inhibits hepatocellular carcinogenesis by enhancing retinol metabolism and suppressing cell proliferation in Hras12V transgenic mice.

Frontiers in oncology·2026

Related Experiment Video

Updated: Jul 11, 2026

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
07:45

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report

Published on: August 4, 2022

Knee bearing technology: where is technology taking us?

Mark A Kester1, Lizeth Herrera, Aiguo Wang

  • 1Stryker Orthopaedics, Mahwah, New Jersey 07430, USA.

The Journal of Arthroplasty
|November 21, 2007
PubMed
Summary

A new sequentially irradiated and annealed bearing material (X3) significantly reduces wear in knee replacements by up to 79%. This advanced polyethylene maintains mechanical properties after aging, unlike conventional materials.

Related Experiment Videos

Last Updated: Jul 11, 2026

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
07:45

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report

Published on: August 4, 2022

Area of Science:

  • Biomaterials Science
  • Orthopedic Engineering
  • Polymer Science

Background:

  • Total knee arthroplasty (TKA) relies on bearing materials to withstand joint loading.
  • Conventional ultra-high molecular weight polyethylene (UHMWPE) exhibits wear, potentially leading to implant failure.
  • Development of advanced bearing materials is crucial for improving TKA longevity.

Purpose of the Study:

  • To develop and characterize a novel sequentially irradiated and annealed bearing material (X3) for knee arthroplasty.
  • To evaluate the mechanical strength, oxidation resistance, and wear reduction capabilities of X3.
  • To compare the performance of X3 against conventional polyethylene under simulated physiological conditions.

Main Methods:

  • Sequential irradiation and annealing process applied to polyethylene.
  • Mechanical testing including ultimate tensile strength, yield strength, and elongation.
  • Knee simulator testing under normal gait and stair climbing conditions.
  • Accelerated aging studies to assess material stability.

Main Results:

  • X3 material demonstrated comparable ultimate tensile and yield strength to conventional polyethylene.
  • Elongation of X3 was reduced but equivalent to direct compression molded 1900 material.
  • X3 exhibited significant wear rate reductions of 79% (normal gait) and 77% (stair climbing) compared to conventional polyethylene.
  • X3 showed no adverse effects after accelerated aging, while conventional polyethylene properties were negatively impacted.

Conclusions:

  • The novel X3 bearing material offers superior wear resistance for knee arthroplasty.
  • Sequential irradiation and annealing enhance polyethylene stability and longevity.
  • X3 presents a promising alternative to conventional polyethylene, potentially improving TKA outcomes.