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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.
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Related Experiment Video

Updated: Jun 13, 2026

Biotribological Testing and Analysis of Articular Cartilage Sliding against Metal for Implants

Biotribological Testing and Analysis of Articular Cartilage Sliding against Metal for Implants

Published on: May 14, 2020

Total Hip Joint Replacement Using a CoCrMo Metal-Metal-Sliding Pairing.

B G Weber¹, M F Semlitsch, R M Streicher

¹Orthopädie und Klinik am Rosenberg, St. Gallen, Switzerland.

Acta Chirurgiae Orthopaedicae Et Traumatologiae Cechoslovaca

|May 5, 2010

Summary

This summary is machine-generated.

Metal-metal total hip replacement offers a durable alternative to polyethylene cups, potentially avoiding loosening and osteolysis. This study presents a new metal-metal hip joint with promising long-term fixation.

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Area of Science:

Orthopedic Surgery
Biomaterials Science
Biomedical Engineering

Background:

Late loosening in total-hip replacement is often caused by polyethylene debris, triggering a foreign body reaction at the bone-implant interface.
Older metal-metal prostheses (e.g., McKee type) implanted decades ago can still function effectively without osteolysis, suggesting material superiority.
Adequate cement anchorage is crucial for the long-term fixation of hip implants.

Purpose of the Study:

To evaluate the long-term performance and fixation of a novel metal-metal total hip joint.
To compare the efficacy of metal-metal pairing against traditional polyethylene components in total hip replacement.
To investigate the potential of metal-metal bearings to mitigate osteolysis and implant loosening.

Main Methods:

Presentation of a new metal-metal total hip joint design.
Analysis of clinical outcomes for 62 implants placed between 1988 and 1990.
Assessment of implant fixation and signs of osteolysis at the bone-cement interface.

Main Results:

The presented metal-metal total hip joint has been implanted 62 times.
Implants were placed between 1988 and 1990, indicating a period of clinical evaluation.
The study implies that metal-metal pairing may offer superior longevity compared to polyethylene, provided cement anchorage is sufficient.

Conclusions:

Metal-metal pairing in total hip replacement demonstrates potential for superior durability and reduced risk of osteolysis compared to polyethylene components.
The long-term success of older metal-metal designs supports the viability of this bearing surface.
Further clinical evaluation of the new metal-metal total hip joint is warranted to confirm its long-term efficacy and safety.