The invention provides biocompatible implants (“scaffolds”) for use in the treatment of tendon injury and/or modulation of the biomechanical properties of tendon. More particularly, the invention provides biocompatible implants capable of delivering microRNA 29 and precursors and mimics thereof to the tendon. In some embodiments the implant comprises a bioresorbable substrate to avoid the need for surgical removal of the implant once healing or re-modelling is complete.