We present a case of a 66-year-old diabetic patient with chronic non-healing sternum after CABG operation. After four attempts of sternum refixation within 2 years, the need of bone debridement resulted in a nearly complete loss of sternum. Finally, a mesh graft and a pectoralis muscle flap were used to bridge the sternal space. Despite good wound healing, the thoracic instability led to intolerable chest pain persisting over the next years. In this case report, we describe the successful thoracic stabilization by using transverse plate fixation, which resulted in perfect thoracic stabilization and immediate cessation of pain.