Harold Brommer finished in 2005 his PhD thesis entitled 'Towards detection of functional failure of equine articular cartilage: the metacarpophalangeal joint under scrutiny.' He is involved into the research lines 'Regenerative Medicine' and 'Bioveterinary Medicine' within the strategic theme 'Life Sciences.' Within the line 'Regenerative Medicine' he focusses on equine joint disease and more specifically on aspects of early degenerative changes of articular cartilage and follow-up of healing after (surgical) repair. He closely collaborates with the research group Biofabrication in Translational Regenerative Medicine and internationally with the Finnish research group 'Biophysics of Bone and Cartilage' in Kuopio. Within the line 'Bioveterinary Medicine' he supervises research in the field of monitoring and rehabilitation of horses post-operative after colic surgery and innovative treatments of endodontal diseases in the horse. He also collaborates with the farriers of the Faculty of Veterinary Medicine on the development of 3-D printed horseshoes.