Abstract:

BACKGROUND: The efficacy of spinal orthopedic fixation has relationship with the fatigue properties and fatigue life of the materials used in fusion and fixation technology.
OBJECTIVE: To analyze the related factors of broken stick after orthopedic surgery for adult scoliosis and the clinical significance.
METHODS: The time for broken rods, activity, implant location, fusion rate, rate of orthopedic surgery and other data of 9 broken stick patients with orthopedic surgery for adult scoliosis were analyzed.
RESULTS AND CONCLUSION: Among the 9 patients, 6 cases with the phenomenon of un-sufficient in laminectomy, and there were obvious blank area and formation of false bone island. The analysis showed that the fatigue life had positive correlation with metal fusion rate and correction rate (P < 0.01). Orthopedic surgery in patients with adult scoliosis fusion in good laminectomy condition can ensure the metal fixation devices applied in the treatment stay in a relatively stable state of fatigue strength to meet the fixation conditions required for the process, and can ensure the fixation of the metal rod to obtain intrinsic fatigue threshold below the point of fatigue, in order to achieve effective and sustained orthopedic fixed purpose, and to avoid the occurrence of broken rods.