Working… Menu

28 mm Ceramic-on-Ceramic Acetabular Cup Total Hip Replacement Study

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. Identifier: NCT00208507
Recruitment Status : Completed
First Posted : September 21, 2005
Results First Posted : February 16, 2011
Last Update Posted : January 24, 2014
Information provided by (Responsible Party):
DePuy Orthopaedics

Brief Summary:
The study is designed to evaluate artificial hips with a 28 mm ceramic head and a ceramic liner to determine whether they perform as well as artificial hips with a 28 mm ceramic head and a polyethylene liner.

Condition or disease Intervention/treatment Phase
Joint Diseases Device: 28 mm ceramic head on ceramic acetabular liner. Device: 28 mm ceramic head on polyethylene liner Not Applicable

Detailed Description:

Total Hip Arthroplasty (THA) is the surgical reconstruction of the hip joint through replacement of the femoral head and the acetabular articulating surfaces with fixed prosthetic devices. The goals of THA are relief from pain, restoration of function, and correction of deformity. THA is one of the most common adult reconstructive procedures. Over the past 25 years, patients who have needed to have their hip joint replaced, either due to trauma or arthritic disease, typically have had their hip joint bone articular surfaces replaced with a metal hip stem, metal ball head (either stainless steel or chrome cobalt) and a plastic acetabular cup (metal/metal/plastic). While the basic device has remained essentially unchanged over that period, technological advancements in implant designs and materials, and improvements in surgical technique and instrumentation have made THA one of the most durable and successful procedures in medicine. Reproducible, high-quality, short-term and mid-term results are attained regularly, and total hip replacements commonly last 10 to 15 years and longer. The success of this procedure has allowed its expansion into a wider, and often younger and more active population.

In spite of the improvements in THA, little change has occurred for the acetabular cup liner, which is usually made out of Ultra High Molecular Weight Polyethylene plastic (UHMWPe). Because it is plastic and inherently soft and somewhat pliable under load, the cup's articular surface must inevitability wear and produce debris. This biologic response is now thought to be a significant contributor to prosthetic component loosening, a primary failure mode of THR. UHMWPe also degrades with time in the body. As concerns about polyethylene wear and the associated untoward effects of the generated wear debris, and as THA continues to be used in younger and higher-demand patients with increasing life expectancies, interest in ceramic on ceramic total hip prosthesis has been renewed.

An alumina ceramic-on-ceramic acetabular coupling has been employed as an alternative to metal/polyethylene couplings. This ceramic-on-ceramic coupling has many advantages, including the elimination of polyethylene from the device system, wear rates that are appreciably less than those experienced with metal/polyethylene couplings and reduced biologic reactivity. The potential benefits of an alumina ceramic/ceramic bearing are significant.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 264 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: Delta Ceramax™ Ceramic-on-Ceramic Acetabular Cup Prosthesis Study (28mm)
Study Start Date : April 2003
Actual Primary Completion Date : March 2008
Actual Study Completion Date : December 2010

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Active Comparator: Delta Ceramax Ceramic-on-Ceramic Acetabular Cup System
Total hip replacement with a 28 mm ceramic head and liner.
Device: 28 mm ceramic head on ceramic acetabular liner.
Total hip replacement with 28 mm ceramic head on ceramic liner articulation
Other Name: Delta Ceramax™ 28 mm Ceramic-on-Ceramic Acetabular Cup

Active Comparator: Pinnacle™ Acetabular Cup with Marathon® Polyethylene
Total hip replacement with 28 mm ceramic head with a polyethylene liner.
Device: 28 mm ceramic head on polyethylene liner
Total hip replacement with 28 mm ceramic head on a polyethylene liner articulation.
Other Name: Detla Ceramax 28 mm ceramic femoral head and Marathon polyethylene liner.

Primary Outcome Measures :
  1. Harris Hip Total Score [ Time Frame: 6 weeks, 6, 12 months and last follow up at 24 months or greater ]
    The Harris Hip scoring system assigns a numeric value to responses from patients and assessments made by a surgeon. A score of 91-100 is excellent, 81-90 is good, 71-80 is fair, 70 or below is poor. The patient records the following: pain level, need for assistance when walking, presence of a limp, distance able to walk, ability to put on shoes and socks, climb stairs, use public transportation and the length of time one is able to comfortably sit in a chair are all scored.

Secondary Outcome Measures :
  1. Complication Rates [ Time Frame: On-going to end of study ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   20 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Non-inflammatory degenerative joint disease. Composite diagnoses of NIDJD include osteoarthritis, avascular necrosis, post-traumatic arthritis, slipped capital femoral epiphysis (SCFE), fracture of the pelvis, and developmental dysplasia.
  • X-ray evaluation confirms the presence of NIDJD
  • Femoral and acetabular bone stock is sufficient, regarding strength and shape, and is suitable to receive the implants.
  • Individuals 20 to 75 years of age at the time of surgery
  • Patients with a previous total hip replacement of the contralateral leg who have a pain rating of none or slight and who are at least one year post arthroplasty are eligible for participation in the study.
  • Harris Hip Score of 70 or lower
  • Pain at least Moderate

Exclusion Criteria:

  • Presence of a previous prosthetic hip replacement device (any type, including surface replacement arthroplasty, endoprosthesis, etc.) in the hip joint to be operated.
  • Previous Girdlestone procedure (resection arthroplasty) or surgical fusion of the hip to be operated.
  • Acute femoral neck fracture.
  • Above knee amputation of the contralateral and/or ipsilateral leg.
  • Patients with bilateral degenerative joint disease requiring staged or simultaneous hip replacements.
  • Patients with an existing total hip arthroplasty in the contralateral hip with a Harris Hip pain rating of mild, moderate, marked or totally disabled.
  • Patients who have undergone total hip arthroplasties in their contralateral hips within the past 12 months.
  • Patients with a known allergy to metal (e.g. jewelry).
  • Skeletally immature patients (tibial and femoral epiphyses are not closed). Evidence of active infections that may spread to other areas of the body (e.g., osteomyelitis, pyogenic infection of the hip joint, overt infection, urinary tract infection, etc.).
  • The presence of highly communicable disease or diseases that may limit follow-up (e.g., immuno-compromised conditions, hepatitis, active tuberculosis, etc.).
  • Presence of known metastatic or neoplastic disease.
  • Significant neurologic or musculoskeletal disorders or disease that may adversely affect gait or weight bearing, (e.g., muscular dystrophy, multiple sclerosis).
  • Conditions that may interfere with the total hip arthroplasty's survival or outcome, (e.g., Paget's disease, Charcot's disease).
  • Any patient believed to be unwilling or unable to comply with a rehabilitation program for a cementless total hip replacement or who indicates difficulty or inability to return for follow-up visits prescribed by the study protocol.
  • Patient is known to be pregnant, a prisoner, mentally incompetent, and/or alcohol or drug abuser.
  • Any systemic steroid therapy, excluding inhalers, within three months prior to surgery.
  • Patients carrying the diagnosis of inflammatory degenerative arthritis (IDJD) to include the following composite diagnoses: rheumatoid arthritis, systemic lupus erythematosus, pigmented villonodular synovitis, juvenile rheumatory arthritis and other arthritic processes of inflammatory or autoimmune etiology.
  • Patients requiring structural bone grafts in order to support the prosthetic component(s) or to shape the bone to receive the implant(s).
  • Patients who refuse to provide consent to participate in the clinical investigation.

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 identifier (NCT number): NCT00208507

Layout table for location information
United States, Colorado
Colorado Joint Replacement
Denver, Colorado, United States, 80210
United States, Ohio
Cardinal Orthopaedic Institute
Columbus, Ohio, United States, 43213
Sponsors and Collaborators
DePuy Orthopaedics
Layout table for investigator information
Principal Investigator: Joel Politi, MD Cardinal Orthopaedic Institute
Principal Investigator: Douglas Dennis, MD Colorado Joint Replacement

Layout table for additonal information
Responsible Party: DePuy Orthopaedics Identifier: NCT00208507     History of Changes
Other Study ID Numbers: COC 28 mm
First Posted: September 21, 2005    Key Record Dates
Results First Posted: February 16, 2011
Last Update Posted: January 24, 2014
Last Verified: December 2013
Keywords provided by DePuy Orthopaedics:
Joint Diseases
Non-Inflammatory Degenerative Joint Disease
Additional relevant MeSH terms:
Layout table for MeSH terms
Joint Diseases
Musculoskeletal Diseases