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Related Experiment Video

Updated: May 15, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
09:31

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty

Published on: February 27, 2018

Strict component positioning is necessary in hip resurfacing.

Yoshitomo Kajino1, Tamon Kabata, Toru Maeda

  • 1Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa 920-8641, Japan.

Journal of Orthopaedic Science : Official Journal of the Japanese Orthopaedic Association
|January 15, 2013
PubMed
Summary

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Hip resurfacing arthroplasty can improve range of motion, but femoral neck preservation may lead to impingement. Careful planning and component positioning are crucial to avoid complications in hip resurfacing surgery.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Implant Design

Background:

  • Hip resurfacing arthroplasty offers benefits like improved articulation and bone preservation.
  • It is a viable option for younger, active patients with hip conditions.
  • Potential complications include metal debris and postoperative impingement due to femoral neck preservation.

Purpose of the Study:

  • To evaluate the range of motion after hip resurfacing.
  • To identify optimal component orientations to avoid postoperative impingement.
  • To analyze the impact of component positioning on range of motion in patients with osteonecrosis.

Main Methods:

  • Computer simulations were used to assess range of motion with various component orientations.
  • The study included 10 male patients with osteonecrosis of the femoral head.

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The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
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Last Updated: May 15, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
09:31

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty

Published on: February 27, 2018

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

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  • Analysis focused on identifying a safe zone for component placement to prevent impingement.

    • Main Results:

    • Mean range of motion in flexion was 92.4°, extension 25.7°, abduction 38.0°, adduction 29.1°, and internal rotation 20.9°.
    • The oscillation angle in flexion and extension was 118.1°.
    • A significant correlation was found between combined anteversion and maximal flexion/extension angles, with a narrow or nonexistent safe zone in some patients.

    Conclusions:

    • Postoperative impingement is common in hip resurfacing due to femoral neck preservation and component malpositioning.
    • The safe zone for acetabular component placement is narrow, requiring precise positioning.
    • Patient selection, preoperative planning, and accurate component placement are critical for successful hip resurfacing.