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Migration Pattern of C-stem AMT Versus Exeter in Total Hip Arthroplasty

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified November 2014 by Oslo University Hospital.
Recruitment status was:  Active, not recruiting
Ringerike hospital HF, Hønefoss Norway
Ortomedic AS, Lysaker Norway
Helse Sor-Ost
Information provided by (Responsible Party):
Oslo University Hospital ( Ullevaal University Hospital ) Identifier:
First received: July 25, 2008
Last updated: November 21, 2014
Last verified: November 2014

Hypothesis: Migration of C-Stem AMT is equal to the well documented Exeter prosthesis

In Norway it is annually performed approximately 600 primary and 100 revisions THA. Osteolysis around the prosthesis is one of the major difficulties while performing revision surgery. C-stem is a triple tapered cemented prosthesis designed to increase the stress and strain of proximal femur and thereby decreasing osteolysis. We are planning til include 70 patients and randomize to C-stem AMT or Exeter prosthesis. Both prosthesis will be combined with previously non documented "Marathon" acetabular prosthesis.

The result will be followed clinically and with RSA and DXA. Soft endpoint after 2 years


Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective
Official Title: Migration Pattern of C-stem AMT Versus Exeter in Total Hip Arthroplasty

Further study details as provided by Oslo University Hospital:

Primary Outcome Measures:
  • Migration of femur- and acetabular prosthesis measured by RSA [ Time Frame: 2008-2012 ]

Secondary Outcome Measures:
  • Periprosthetic osteolysis of proximal femur [ Time Frame: 2008-2012 ]

Enrollment: 70
Study Start Date: July 2008
Estimated Study Completion Date: July 2015
Primary Completion Date: May 2012 (Final data collection date for primary outcome measure)


Ages Eligible for Study:   30 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
70 patients admitted to orthopedic clinic Ringerike hospital for coxarthrosis are planned to be included in stydy. The all should agree in a written form to participate in study. They are randomized to be operated THA with Exeter- or C-stem AMT femur prostesis. Marathon acetabular prosthesis will be used for all patients included.

Inclusion Criteria:

  • coxarthrosis

Exclusion Criteria:

  • age over 80
  • major medial condition such as renal failure, chronic obstructive lung disease heart failure etc
  Contacts and Locations
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Please refer to this study by its identifier: NCT00722982

Oslo University Hospital
Oslo, Norway, 0407
Sponsors and Collaborators
Ullevaal University Hospital
Ringerike hospital HF, Hønefoss Norway
Ortomedic AS, Lysaker Norway
Helse Sor-Ost
Study Chair: Lars Nordsletten, Professor Ullevaal University Hospital
  More Information

Responsible Party: Ullevaal University Hospital Identifier: NCT00722982     History of Changes
Other Study ID Numbers: C-stem AMT
Study First Received: July 25, 2008
Last Updated: November 21, 2014

Keywords provided by Oslo University Hospital:
C-stem AMT

Additional relevant MeSH terms:
Osteoarthritis, Hip
Joint Diseases
Musculoskeletal Diseases
Rheumatic Diseases processed this record on April 26, 2017