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This study has been terminated.
(The results obtained 1 year after surgery were clearly indicative of the outcome and the investigators decided to terminate follow-up at that point.)
Information provided by:
Smith & Nephew, Inc. Identifier:
First received: February 27, 2009
Last updated: May 22, 2014
Last verified: May 2014

Overall study design:

A prospective, randomized, multi-center clinical studies comparing the minimal invasive and the standard surgical total knee replacement technique (control) using the Genesis II total knee system. The study will collect efficacy, safety and socio-economical data over 2 years. An additional 5 years follow-up interval is optional. The objectives (short-term follow-up) of the study are to:

  1. Assess whether the improvement in Pain and Range of motion per Knee Society scoring system and VAS score.
  2. Assess whether there are any differences between the surgical techniques as regards complication rate.
  3. Assess whether the hospital stay and the rehabilitation time (Straight leg raise, Active/passive ROM) of the patients differs between the two techniques.
  4. Assess the x-ray mechanical alignment between the two techniques.

Attempts will be made to assess whether the collected peri-operative data (including incision length, blood loss, wound appearance, hospital readmissions and operative time) differs between the two surgical techniques.

The primary objectives (mid-term follow-up) of the study are to:

  1. Improvement in Pain and Function per Knee Society Scoring system
  2. Number and Extent of Radiographic Lucencies >2mm
  3. Revision and knee-related adverse events
  4. Improvement in Quality-of-life via the VAS score

5 investigational sites will participate and enroll a total of approximately 250 patients over a 12 months period. Thus, each site will enroll 50 patients.

Condition Intervention Phase
Osteoarthritis of the Knee Procedure: surgical technique Phase 4

Study Type: Interventional
Official Title: A Prospective (Non)-Randomized Controlled Multicenter Clinical Study Of the Genesis ii Total Knee System in Minimally Invasive Total Knee Arthroplasty

Resource links provided by NLM:

Further study details as provided by Smith & Nephew, Inc.:

Primary Outcome Measures:
  • Pain and Range of Motion on the short term as efficacy measurements. Occurence of Adverse Events as safety measurements [ Time Frame: 1 year ]

Secondary Outcome Measures:
  • Occurence of Adverse Events and Radiolucent lines > 2mm Range of motion on the mid term [ Time Frame: 2 years ]

Study Start Date: October 2004
Study Completion Date: December 2007
Primary Completion Date: October 2007 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Minimal Invasive Surgery, Procedure: surgical technique
Active Comparator: Standard Surgical Technique Procedure: surgical technique


Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • require primary uni- or bilateral total knee arthroplasty; available for 2 year follow up; provide informed consent; is in stable health for cardio-pulmonary conditions.

Exclusion Criteria:

  • inefficient femoral or tibial bone stock; BMI >35; fixed flexion deformity >15 degrees; knee flexion of <90 degrees; varus/valgus deformity >20 degrees; active local infection; conditions that would compromise the 2 years follow up.
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00853398

Orthopaedic Department, University Hospital
Tübingen, Germany, 72076
Sponsors and Collaborators
Smith & Nephew Orthopaedics AG
  More Information Identifier: NCT00853398     History of Changes
Other Study ID Numbers: MIS_GEN_II_6112003
Study First Received: February 27, 2009
Last Updated: May 22, 2014

Keywords provided by Smith & Nephew, Inc.:
Primary Osteoarthritis of the knee.

Additional relevant MeSH terms:
Osteoarthritis, Knee
Joint Diseases
Musculoskeletal Diseases
Rheumatic Diseases processed this record on September 21, 2017