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Changes in the Appendicular Skeleton with Age01:09

Changes in the Appendicular Skeleton with Age

The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
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Related Experiment Video

Updated: Jun 3, 2026

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
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Sporting activity after hip resurfacing: changes over time.

Michel J Le Duff1, Harlan C Amstutz

  • 1Joint Replacement Institute at St Vincent Medical Center, Los Angeles, CA 90057, USA.

The Orthopedic Clinics of North America
|March 26, 2011
PubMed
Summary

This study introduces a new method to measure patient sports activity after hip resurfacing. It aims to understand how activity levels change over time and impact implant longevity.

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Last Updated: Jun 3, 2026

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Published on: September 7, 2022

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
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Published on: July 2, 2021

Area of Science:

  • Orthopedic surgery
  • Sports medicine
  • Biomedical engineering

Background:

  • Hip resurfacing is an alternative to total hip replacement.
  • Patient sporting activity post-hip surgery is crucial for outcomes.
  • No standardized method exists to quantify sporting activity after hip resurfacing.

Purpose of the Study:

  • To develop and validate a scoring algorithm for quantifying patient sporting activities after hip resurfacing.
  • To assess the evolution of sporting activity from early to long-term follow-up.
  • To provide a tool for correlating activity levels with implant survival rates.

Main Methods:

  • Development of a novel scoring algorithm.
  • Assessment of activity type, frequency, and duration.
  • Comparison of early postoperative and mid- to long-term follow-up data.

Main Results:

  • A scoring algorithm was successfully developed.
  • The algorithm allows for quantification of sporting activity.
  • Data collection for early and long-term follow-up is feasible.

Conclusions:

  • Quantifying sporting activity after hip resurfacing is achievable with the developed algorithm.
  • This tool can aid in understanding the relationship between patient activity and prosthesis failure.
  • Further research is needed to establish correlations between activity and implant survival.