Synthetic / BioResorb - βioResorb® Macro Pore Betabase MP consists of pure-phase β-TCP, and since it is a synthetic material it is completely safe for the patient. The high overall porosity of Betabase MP (> 60%) means that the body has to break down a far smaller quantity of bone replacement material, based on the volume of the defect. This accelerates the resorption process and also creates new opportunities to fill large bone defects. Clinical studies have demonstrated that the material is completely resorbable after ca. 6 to 24 months.