ACL Program | BEAR (TM) Trial Eligibility Criteria

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Contact the ACL Program

  • 617-355-3501
  • International: +1-617-355-5209
  • Locations

We are currently enrolling patients in the BEAR (TM) II study.  To learn more about the BEAR (TM) II trial or to schedule an appointment with a BEAR(TM) trial physician, please call 617-355-3501 or email

Patients eligible for the study:

•   will be ages 14 to 35, but need to have closed growth plates
•   will have a complete ACL tear which occurred in the past 30 days
•   cannot have a history of prior surgery on the affected knee
•   must not use tobacco, corticosteroids or have a history of diabetes
    or inflammatory arthritis
•   must not have an allergy to bovine collagen (cow protein)

Patients will be randomly assigned to have the BEAR (TM) procedure (two-thirds of patients) or a standard ACL reconstruction (one-third of patients) and will not be told which group they are in until two years after their surgery.

For more information download the brochure or to learn more about the BEAR (TM) trial email us at

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- Sandra L. Fenwick, President and CEO

Boston Children's Hospital
300 Longwood Avenue, Boston, MA 02115
For Patients: 617-355-6000
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