Spherical Bead and Irregular Particle Porous Coatings for Implant Fixation. Founded in 1984, Orchid Bio-Vac has a long and proven track record coating implants for customers in the orthopedic, dental, spinal, veterinary and cardiovascular markets. We offer a range of morphologies in both titanium and cobalt-chrome-molybdenum alloys that provide a three-dimensional porous matrix for bone in-growth to stabilize implants after surgery. To date, we have coated more than 2.5 million implants worldwide.