- Salomi R. Vora
Progression of Hip Dysplasia1
The Bernese Periacetabular Osteotomy (BPO)
was developed in 1984 and was published in
This minimally invasive technique was
developed to address the following needs;
- Increased reorientation of acetabulum to
increase hip contact area.
- Increased stability of hemi- pelvis for immediate
weight bearing in the post operative phase.1
Advantages of Osteotomy:
area of hip.
Advantages of BPO:3
• Single incision – no
• No disruption of
pelvic or outlet ring.
• Allows for
assess the labrum/
Criteria for performing BPO1,3:
Young age (at least < 50- 55 years
Presence of concentric / internal
rotation hip motion.
Spherical joint surfaces.
No secondary arthrosis (Tonnis Grade
Functional Measures for
Tonnis Classification for
- Population = 24 patients
- Follow up duration = mean of 3.5 years
- Results = 18 out of 24 patients showed
high functional level on follow up.4
- Population = 26 patients with unilateral
- Follow up duration = 7-15 years.
- Results = 4 patients THA, 8 patients
considerable arthrosis and 14 patients
no/ mild arthrosis on follow up. 1
Post –Operative Therapy
Mobilization with partial weight bearing
(20- 40 pounds)- 3 days.
AROM Exercises with > 90° - 4 weeks
Total weight bearing – 6-8 weeks.
Tonnis classification for OA:
1. Kralj M, Mavcic B, Antolic V, Iglic A, Kralj-Iglic V. The Bernese
periacetabular osteotomy: clinical, radiographic and mechanical
7-15-year follow-up of 26 hips. Acta Orthopaedica. December
2. Ganz R, Klaue K, Vinh T, Mast J. A new periacetabular osteotomy
for the treatment of hip dysplasias: technique and preliminary
results. 1988. Clinical Orthopaedics And Related Research.
3. Trousdale R, Cabanela M. Lessons learned after more than 250
periacetabular osteotomies. Acta Orthopaedica Scandinavica.
1. Badra M, Anand A, Straight J, Sala D, Ruchelsman D, Feldman D.
Functional outcome in adult patients following Bernese
periacetabular osteotomy. Orthopedics. January 2008;31(1):69.