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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...
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...

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Related Experiment Video

Updated: Jul 2, 2026

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
09:51

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

Published on: September 7, 2022

Experience with the Mayo conservative hip system.

A Hagel1, W Hein, D Wohlrab

  • 1Klinik für Orthopaedie, Halle, Germany.

Acta Chirurgiae Orthopaedicae Et Traumatologiae Cechoslovaca
|September 2, 2008
PubMed
Summary
This summary is machine-generated.

The MAYO conservative hip stem demonstrated excellent outcomes, significantly improving hip function and bone density. This bone-preserving implant effectively addresses stress shielding in total hip arthroplasty patients.

Related Experiment Videos

Last Updated: Jul 2, 2026

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
09:51

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

Published on: September 7, 2022

Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Radiology

Background:

  • Cementless total hip arthroplasty (THA) faces challenges with wear, loosening, and stress shielding.
  • Recent advancements show THA survivorship exceeding 97%, suggesting wear and loosening are largely resolved.
  • Focus shifts to bone-preserving primary implants for physiological load transfer and minimal stress shielding.

Purpose of the Study:

  • Evaluate the MAYO conservative hip stem, designed for metaphyseal load transfer and immediate fixation.
  • Assess the implant's ability to preserve bone and prevent stress shielding in the proximal femur.
  • Determine the clinical and radiographic outcomes of this bone-preserving THA implant.

Main Methods:

  • Retrospective analysis of 316 consecutive MAYO conservative hip stems.
  • Radiographic assessment of 85.4% (270 stems) using the Harris Hip Score (HHS).
  • Dual-energy X-ray absorptiometry (DEXA) scans to evaluate bone density.

Main Results:

  • Mean HHS improved significantly from 44.79 preoperatively to 93.58 postoperatively.
  • Aseptic loosening occurred in only 1.85% (5 stems), necessitating revision.
  • DEXA scans confirmed metaphyseal load transfer and increased bone density in the calcar region.

Conclusions:

  • The MAYO conservative hip stem promotes proximal load transfer, crucial for younger, active patients requiring revision surgery.
  • This implant design effectively mitigates stress shielding of the proximal femur.
  • Minimally invasive implantation contributes to enhanced periprosthetic bone density and optimized rehabilitation.