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Periacetabular Osteotomy.A Prospective Study With Reference to Cartilage, Migration and Bone Density

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: July 14, 2005
Last Update Posted: February 12, 2008
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
University of Aarhus
The purpose of this study is to evaluate the effect of performing a periacetabular osteotomy on patients with hip dysplasia.

Condition Intervention
Osteoarthritis Procedure: 1 Periacetabular osteotomy

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Periacetabular Osteotomy. A Prospective Study With Reference to Cartilage, Migration and Bone Density

Resource links provided by NLM:

Further study details as provided by University of Aarhus:

Primary Outcome Measures:
  • migration of acetabulum [ Time Frame: six months ]

Secondary Outcome Measures:
  • BMD in acetabulum [ Time Frame: within two and a half year ]
  • status of labrum [ Time Frame: three years after pelvic osteotomy ]
  • changes in cartilage thickness [ Time Frame: two and half a year ]

Enrollment: 35
Study Start Date: October 2003
Study Completion Date: December 2007
Primary Completion Date: December 2007 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 1 Procedure: 1 Periacetabular osteotomy
pelvic osteotomy to increase acetabular coverage
Other Name: periacetabular osteotomy

Detailed Description:

The cause of osteoarthritis in hip dysplasia is thought to be attributable to increased joint contact pressures secondary to decreased acetabular coverage of the femoral head and/or incongruity of the articular surfaces. The investigators' hypothesis is that when periacetabular osteotomy is performed and contact pressure on cartilage reduced, additional joint degeneration will be slowed or prevented unless irreparable damage to the cartilage has happened at the time periacetabular osteotomy is performed. Hence, the purposes of this study are:

  • to develop an unbiased and precise method for measurement of the thickness of the articular cartilage in the hip joint because such a method can be used to evaluate the effect of periacetabular osteotomy and also to give a more precise indication/contraindication for surgery;
  • to evaluate the migration of the acetabulum postoperatively and 6 months after surgery by use of RSA to examine the stability of the osteotomy; and
  • to examine bone mineral density in acetabulum 1 and 2 years after surgery in order to find out whether the change in load distribution will affect bone density of the acetabulum over time in a way that in the area where more load is applied, bone density will increase, and in areas with less load, bone density will decrease;
  • to examine the labrum in the hip joint.

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Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients with radiologically diagnosed hip dysplasia (CE-angle < 25°)
  • Patients with osteoarthritis graded 0, 1 or 2 defined according to Tönnis' classification
  • Patients with pain from hip
  • Age > 18 years
  • Minimum 110° flexion in hip joint and closed growth zones in the pelvic region
  • Informed consent

Exclusion Criteria:

  • Patients with neurological diseases
  • Patients with calvé-Legg-Perthes syndrome
  • Patients where a femoral intertrochanteric osteotomy is necessary
  • Patients with medical sequelae after earlier hip surgery
  • Females who are pregnant
  • Patients with metal implants
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00119977

Orthopaedic Center, Aarhus University Hospital
Aarhus, Denmark, 8000
Sponsors and Collaborators
University of Aarhus
Principal Investigator: Kjeld Søballe, MD Professor Orthopaedic Center, Aarhus University Hospital, Aarhus Denmark
  More Information

Responsible Party: Inger Mechlenburg, post doc., Aarhus University Hospital
ClinicalTrials.gov Identifier: NCT00119977     History of Changes
Other Study ID Numbers: 20050605
First Submitted: July 5, 2005
First Posted: July 14, 2005
Last Update Posted: February 12, 2008
Last Verified: January 2008

Keywords provided by University of Aarhus:
cartilage thickness
ultra sound
periacetabular osteotomy

Additional relevant MeSH terms:
Joint Diseases
Musculoskeletal Diseases
Rheumatic Diseases