A Virtual Response Surface Strategy to Predict the Effects of Contouring on the Static and Fatigue Mechanical Behavior of Spinal Rods.

• Tác giả: Francesca Berti, Linda Carpenedo, Luigi La Barbera
• Ngôn ngữ: eng
• Ký hiệu phân loại: 594.38 *Pulmonata
• Thông tin xuất bản: United States : Annals of biomedical engineering , 2025
• Bộ sưu tập: NCBI
• ID: 188577

Tóm tắt

 Spinal fixation techniques based on contoured spinal rods are well established to restore an adequate sagittal alignment
  however, they often break due to fatigue loading because residual stresses arise while deforming the material and they significantly reduce rod fatigue strength. The present paper aims at developing a novel strategy based on Response Surfaces (RS) as surrogate reduced order models to accurately predict the key biomechanical parameters involved both during static spinal rod contouring and subsequent fatigue loading. Finite element (FE) models of different contouring methods are performed on a wide range of spinal rods to reproduce typical clinical scenarios. RSs based on polynomial equations are initially used to fit the collected FE data and relate input parameters of the process to outputs mechanical variables. Then, the RS approach is assessed and validated by comparison with extensive experimental observations from a variety of fatigue tests. The RS provides an accurate prediction of the output parameters of interest (R