Determination of Three-Dimensional Corrective Force in Adolescent Idiopathic Scoliosis and Biomechanical Finite Element Analysis

Abstract

Aims In this study we have considered the three dimensional corrective forces for correction of scoliosis by using a patient specific finite element model. Materials and Methods An objective function of corrective forces in three-dimensional space was defined. Computed tomography images were used to reconstruct three dimensional model of scoliotic trunk. Computer aided engineering software Abaqus was used to establish finite element model of deformed spine and its biomechanical characteristics were analyzed. By adjusting magnitude and position of corrective forces, objective function was minimized to achieve best orthopedic effect. The proposed corrective conditions were divided into three groups: (1) thoracic deformity; (2) lumbar deformity; (3) both thoracic and lumbar deformities were considered. Results In all three cases, the objective function was reduced by 58, 52, and 63%, respectively. The best correction forces point was located on convex side of maximum displacement of vertebral body. Conclusion Using minimum objective function method, spinal deformity in three-dimensional space can be sufficiently reduced. This study provides scientific basis for design of a new corrective brace for treatment of scoliosis.

Intelligence-Based Spine Care Model: A New Era of Research and Clinical Decision-Making

“… 103 More recently, patient specific FEA has been used to determine the best point of force application for brace design to correct scoliotic deformity. 104 Another tool was developed to monitor and plan treatments for adolescent idiopathic scoliosis on a web-based platform to facilitate collaborative clinical decision-making. 105 The intent was to provide a web-based approach to monitoring curvature change while minimizing the number of radiographs required and exposure to ionizing radiation.…”

Risk Factors, Lifestyle and Prevention among Adolescents with Idiopathic Juvenile Scoliosis: A Cross Sectional Study in Eleven First-Grade Secondary Schools of Palermo Province, Italy

“…Adolescent idiopathic scoliosis (AIS) is a three-dimensional deformity of the spine in the three planes of space [ 1 , 2 , 3 ]. Its prevalence is between 0.47% and 5.2%, with an incidence of the disease equal to 2–3% in the general population and a female/male ratio equal to 4:1 [ 4 ].…”

Comparative Analysis of the Biomechanical Characteristics After Different Minimally Invasive Surgeries for Cervical Spondylopathy: A Finite Element Analysis

“…The vertebral body was simulated by four-node tetrahedral elements, and the rest of the material was simulated by eight-node hexahedral elements. The detailed material properties ( Lee et al, 2011 ; Cai et al, 2020a ; Guan et al, 2020 ; Hua et al, 2020 ; Ke et al, 2020 ; Wang et al, 2020 ; Sang et al, 2021 ; Wo et al, 2021 ) of all parts are presented in Table 1 .…”