抄録
Recently, a bioabsorbable osteosynthesis system (BOS) that does not need a removal operation and causes fewer side reactions has been used in clinics, especially in jaw deformity and jaw fracture operations in the oral and maxillofacial region. This system cannot yet take the place of the metal osteosynthesis system (MOS) because of less strength and higher cost compared with MOS. We experienced a miniscrew fractured case of BOS in genioplasty which was caused by over-fasteningthe miniscrews. We therefore developed a new BOS in which the strength of the miniscrew and the shape of the miniplate were improved and a new torque screwdriver was employed.We applied the new BOS on orthognathic surgery and gained good results.
