Biomechanical guidance system for periacetabular osteotomy

Mehran Armand, Robert Grupp, Ryan Murphy, Rachel Hegman, Robert Armiger, Russell Taylor, Benjamin McArthur, Jyri Lepisto

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Scopus citations


This chapter presents a biomechanical guidance navigation system for performing periacetabular osteotomy (PAO) to treat developmental dysplasia of the hip. The main motivation of the biomechanical guidance system (BGS) is to plan and track the osteotomized fragment in real time during PAO while simplifying this challenging procedure. The BGS computes the three-dimensional position of the osteotomized fragment in terms of conventional anatomical angles and simulates biomechanical states of the joint. This chapter describes the BGS structure and its application using two different navigation approaches including optical tracking of the fragment and x-ray-based navigation. Both cadaver studies and preliminary clinical studies showed that the biomechanical planning is consistent with traditional PAO planning techniques and that the additional information provided by accurate 3D positioning of the fragment does not adversely impact the surgery.

Original languageEnglish (US)
Title of host publicationAdvances in Experimental Medicine and Biology
PublisherSpringer New York LLC
Number of pages11
StatePublished - 2018

Publication series

NameAdvances in Experimental Medicine and Biology
ISSN (Print)0065-2598
ISSN (Electronic)2214-8019


  • Biomechanical guidance system
  • Developmental dysplasia of the hip (DDH)
  • Periacetabular osteotomy (PAO)
  • X-ray-based navigation

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology


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