Disclosed is a method of manufacturing a calcium phosphate-based bioabsorbable microscrew for fixing a barrier membrane that protects alveolar material used in guided bone regeneration, which is performed to reinforce alveolar material absorbed into an implantation site for a dental implant procedure and to repair a local bone defect, the method including mixing a hydroxyapatite powder with a β-tricalcium phosphate powder to prepare a composite powder, adding and mixing the composite powder with a binder to prepare a screw-molding powder, molding the screw-molding powder into a microscrew using an injection-molding machine, primarily heat-treating the microscrew, and secondarily heat-treating the primarily heat-treated microscrew. The microscrew thus manufactured can be bioabsorbed, thereby obviating additional surgical removal after healing, preventing a problem of a decreased repair rate due to the excessive metal fixed to a wounded portion and consequent overprotection, and generating no side effects.
