Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Double Bundle Anterior Cruciate Ligament Reconstruction

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
Lars Engebretsen, Oslo University Hospital Identifier:
First received: December 15, 2009
Last updated: April 4, 2017
Last verified: April 2017

There has been an increased awareness towards ACL (anterior cruciate ligament) injuries for Norwegian teams, particularly in handball and soccer. The reported number of reconstructions in Norway ranges from 1500 to 2000 per year, and in the United States from 50,000 to 100,000 per year, making ACL reconstruction one of the most common orthopaedic procedures performed, especially among young, active and healthy individuals. However, reports state that there is a subset of patients (10-40%) who remain subjectively and objectively unstable and/or are unable to regain prior function. Additionally, it has been reported that degenerative joint disease is associated with traditional single-bundle ACL reconstructions in up to 50% of the patients in long term follow up studies.

It is well known that the ACL is composed of 2 functional bundles named after their tibial attachments, the anteromedial (AM) and posterolateral (PL) bundles.

It is believed that the current single-graft, single-bundle technique for reconstructing the anterior cruciate ligament does not anatomically reconstruct either one of these bundles.

In the last two years, the double bundle technique has been introduced and a few clinical studies are available, however only a few RCTs.

Further study is very important to determine if double-bundle ACL reconstructions should be performed, if single-bundle reconstructions can be adjusted to better adapt to their biomechanical insufficiency in restoring internal rotation torques and valgus moments, and also in trying to identify which patients might better benefit from single-bundle versus double-bundle ACL reconstructions.

Condition Intervention
Knee Outcome, Subjective
Procedure: Single bundle
Procedure: Double bundle

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Investigator
Primary Purpose: Treatment
Official Title: Single Bundle or Double Bundle Anterior Cruciate Ligament Reconstruction. A Randomized, Controlled Trial.

Resource links provided by NLM:

Further study details as provided by Oslo University Hospital:

Primary Outcome Measures:
  • KOOS score(QOL) [ Time Frame: 1-5 years ]

Secondary Outcome Measures:
  • Standing radiographs (Kellgren Lawrence methode) [ Time Frame: 3-5 years ]

Estimated Enrollment: 120
Study Start Date: January 2010
Estimated Study Completion Date: June 2017
Estimated Primary Completion Date: June 2017 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Single-bundle technique
Anatomic single-bundle technique
Procedure: Single bundle


Transarthroscopic technique with medial portal placement of the femoral tunnel. Harvest of the semitendinosus/gracilis (ST/G) tendons through a 3-5 cm incision at the pes anserinus. The femoral tunnel is positioned at the anatomic foot print determined by the anatomic landmarks. The graft will be fixed with an Endobutton CL on the femur and with an Biosure PK screw in the tibia with the knee close to extension. Prior to the final fixation, the knee will be taken through flexion and extension movements.The surgery will be carried out by an experienced knee surgeon.

Other Name: Endobutton
Active Comparator: Double-bundle technique
Anatomic double bundle technique
Procedure: Double bundle


Transarthroscopic technique. Harvest of the semitendinosus/gracilis (ST/G) tendons through a 3-5 cm incision at the pes anserinus.Through a medial portal 2 tunnels will be anatomically placed in the foot print on the femur and the two tibial tunnels will be placed using the Smith & Nephew drill guide. The graft will be fixed with 2 Endobuttons on the femur and with 2 Biosure PK screws in the tibia. Prior to the final fixation, the knee will be taken through 20 flexion and extension movements. The PL bundle will be fixed with the knee close to ful extension. The surgery will be carried out by an experienced knee surgeon.

Other Name: Endobutton

Detailed Description:

The aim of this study:

The primary aim is to compare the two operational techniques: single bundle hamstrings versus double bundle hamstrings ACL reconstruction, using the KOOS (Knee Osteoarthritis Outcome Score) Quality of Life(QoL) subscore as the primary outcome and clinical examinations, functional tests and standing radiographs (Kellgren Lawrence method) as secondary outcome measurements. Those assesments will be measured after 1,2 and 5 years after the operation.


There are no difference between the two methods as judged by the KOOS QoL subscore.

Questions to be answered:

Is there a difference between double-bundle and single-bundle technique in the subjective outcome scores as measured by the KOOS score? Are there differences between hamstrings single bundle and double bundle technique when the Lachman test and the pivot shift test are being used? Is there a difference between hamstrings double-bundle technique and single-bundle technique in return to sports and activity level? Are there differences between double-bundle technique and single -bundle technique in functional tests (one-leg hop test)? Is there a difference in the development of osteoarthritis between the two techniques?


Ages Eligible for Study:   18 Years to 40 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Clinically verified ACL rupture (history, Lachman test 2+ or more with no endpoint; pos pivot shift and arthroscopically verified) The graft used for AM bundle has a minimum size of 6.0 mm and 5.0 mm for t he PL bundle.

Exclusion Criteria:

  • PCL injury,
  • ACL injury to the contra lateral knee
  • > 1+ medial or lateral-posterolateral ligament instability at operation date
  • Previous ACL reconstruction
  • Meniscal injury leaving < 50% of the meniscus intact
  • Established OA as judged by Kellgren 3-4.
  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: NCT01033188

Ullevaal University Hospital
Oslo, Norway
Sponsors and Collaborators
Oslo University Hospital
Study Chair: Lars Engebretsen, Phd, MD Supervisor
  More Information

Responsible Party: Lars Engebretsen, Professor, Oslo University Hospital Identifier: NCT01033188     History of Changes
Other Study ID Numbers: 6.2009.234
Study First Received: December 15, 2009
Last Updated: April 4, 2017

Keywords provided by Oslo University Hospital:
double bundle
hamstring graft
ACL reconstruction
single bundle processed this record on May 25, 2017