[Anatomic reconstruction of hip joint biomechanics with the bone preserving Silent Micro Hip™ prosthesis]

Z Orthop Unfall. 2013 Oct;151(5):497-502. doi: 10.1055/s-0033-1350862. Epub 2013 Oct 15.
[Article in German]


Background: The design and the surgical technique of the Silent Micro Hip™ are different compared to other hip stems due to a conical shape for fixation within the metaphyseal femur. The purpose of the present study was to evaluate hip joint biomechanics of the Silent Micro Hip™ in comparison to other implants. Implant-specific differences are highlighted.

Material and method: 150 consecutive patients (each group 50 Silent Micro Hip™, Nanos™ and SL-Plus™ MIA) were analysed retrospectively. For evaluation of biomechanical parameters pre- and postoperative X-rays (pelvic AP views) were used.

Results: The horizontal femoral offset and the limb length showed no significant difference between the Silent Micro Hip™ and the Nanos™ or SL-Plus™ MIA stem at the reconstructed hip. An almost anatomic reconstruction of hip joint biomechanics was reached with all three types of implants.

Conclusions: The Silent Micro Hip™ allows for almost anatomic reconstruction of hip joint biomechanics. Short-term results support the bone-preserving reconstruction with a proximal femoral load transfer. Further studies on the mid- and long-term outcomes are ongoing.

Publication types

  • Controlled Clinical Trial
  • English Abstract

MeSH terms

  • Arthroplasty, Replacement, Hip / instrumentation
  • Arthroplasty, Replacement, Hip / methods
  • Equipment Failure Analysis
  • Female
  • Hip Joint / physiopathology*
  • Hip Joint / surgery*
  • Hip Prosthesis*
  • Humans
  • Male
  • Middle Aged
  • Miniaturization
  • Organ Sparing Treatments / instrumentation
  • Organ Sparing Treatments / methods*
  • Osteoarthritis, Hip / pathology
  • Osteoarthritis, Hip / physiopathology*
  • Osteoarthritis, Hip / surgery*
  • Prosthesis Design
  • Range of Motion, Articular*
  • Treatment Outcome