Treatment with Chrysalin did not demonstrate benefit compared to placebo.

The purpose of this study is to evaluate the safety of Chrysalin, also known as TP508, and to determine the effectiveness of four doses of Chrysalin for treating broken wrists in adults.

There is a medical need for a product that is safe and can accelerate the rate of bone healing, leading to a reduction in immobilization time. Chrysalin, also known as TP508, is a synthetic peptide (protein) that is an exact copy of part of the human protein thrombin, which is a protein that occurs naturally in the body. Chrysalin can be used to mimic part of the thrombin response after injury without stimulating any of the events associated with blood clotting, and can therefore accelerate the normal process of healing.

Inclusion Criteria:

• An unstable and/or displaced fracture of the distal radius
• Fracture classified as primary intra-articular or extra-articular
• Male, or non-pregnant, non-lactating female at least 18 years old. If female of childbearing potential, must have confirmed negative pregnancy test prior to administration of study product. Must agree to use a medically approved method of birth control for 6 months.
• Need ability to understand study requirements, provide written informed consent, and comply with study protocol
• Need ability to understand and provide written authorization for use and disclosure of health information per Health Insurance Portability and Accountability Act (HIPAA)

Exclusion Criteria:

• History of distal radius fracture of the affected limb 2 years prior to study enrollment
• History of uncontrolled Type I or Type II diabetes mellitus
• History or clinical evidence of any active medical disease or condition which would make the subject, in the opinion of the investigator, unsuitable for the study, or could potentially confound the results of the study
• Concurrent use of other investigational (non-Food and Drug Administration [FDA]-approved) agent or device
• Participation in any other clinical study within 90 days prior to treatment with the study drug
• Female subjects who are pregnant or nursing