Preoperative assessment and evaluation of instrumentation strategies for the treatment of adolescent idiopathic scoliosis: computer simulation and optimization

Majdouline, Younes; Aubin, Carl‐Éric; Wang, Xiaoyu; Sangole, Archana P.

doi:10.1186/1748-7161-7-21

Cited by 17 publications

(13 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A simple objective function was used to rate the outcome of the virtual surgery weighting the contribution of the predicted 3D descriptors of the scoliotic curve and its residual mobility [ 27 , 28 ]:…”

Section: Methodsmentioning

confidence: 99%

“…Surgeon’s preference for one or more of the above-mentioned descriptors, specified by the weighting terms ( ), was derived from a previous survey on experienced surgeons of the Scoliosis Research Society and Spinal Deformity Study Group (Table 2 ) [ 20 , 28 ]. This resulted in 550 possible combinations (10 curves, 5 screw patterns/ID, 11 correction objectives).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Correction objectives have higher impact than screw pattern and density on the optimal 3D correction of thoracic AIS: a biomechanical study

2021

Self Cite

View full text Add to dashboard Cite

Study design Assessment of screw pattern, implant density (ID), and optimization of 3D correction through computer-based biomechanical models. Objective To investigate how screw pattern and ID affect intraoperative 3D correction of thoracic curves in adolescent idiopathic scoliosis, and how different correction objectives impact the optimal screw pattern. Summary of background data Screw pattern, ID, correction objectives and surgical strategies for posterior fusion of AIS are highly variable among experienced surgeons. The “optimal” instrumentation remains not well defined. Methods 10 patient-specific multibody models of representative adolescent idiopathic scoliosis Lenke 1A cases were built and used to compare alternative virtual correction surgeries. Five screw patterns and IDs (average: 1.6 screws/instrumented level, range: 1.2–2) were simulated, considering concave rod rotation, en bloc derotation, and compression/distraction as primary correction maneuvers. 3D correction descriptors were quantified in the coronal, sagittal and transverse planes. An objective function weighting the contribution of intraoperative 3D correction and mobility allowed rating of the outcomes of the virtual surgeries. Based on surgeon-dependent correction objectives, the optimal result among the simulated constructs was identified. Results Low-density (ID ≤ 1.4) constructs provided equivalent 3D correction compared to higher (ID ≥ 1.8) densities (average differences ranging between 2° and 3°). The optimal screw pattern varied from case to case, falling within the low-density screw category in 14% of considered scenarios, 73% in the mid-density (1.4 < ID < 1.8) and 13% in the high-density. The optimal screw pattern was unique in five cases; multiple optima were found in other cases depending on the considered correction objectives. Conclusions Low-density screw patterns provided equivalent intraoperative 3D correction to higher-density patterns. Simulated surgeon’s choice of correction objectives had the greatest impact on the selection of the optimal construct for 3D correction, while screw density and ID had a limited impact. Level of evidence N/A.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Correction objectives have higher impact than screw pattern and density on the optimal 3D correction of thoracic AIS: a biomechanical study

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Combined with the research of scholars ( Wynarsky, 1988 , Wynarsky and Schultz, 1991 ; Gignac et al, 2000 ; Majdouline et al, 2012 ) and spinal deformities orthopedic parameters in 3D plane, the objective function was optimized. In coordinate system, coronal axis was X axis, sagittal axis Y axis and vertical axis as Z axis.…”

Section: Methodsmentioning

confidence: 99%

“…The research demonstrates the potential to optimize the planning of surgical instrumentation in AIS. Majdouline et al (2012) defined correction objectives to get optimize instrumentation configurations. The ideal corrective effects of brace is lacking research.…”

Section: Introductionmentioning

confidence: 99%

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

Guan

Zhang

Anwar

et al. 2020

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

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.

show abstract

“…Another example was presented in Ref. ( 82 ) where the authors showed that with biomechanical modeling the instrumentation configuration can be optimized based on clinical objectives. Murphy et al ( 83 ) presented the development of a biomechanical guidance system (BGS) for PAO.…”

Section: Future Perspectivesmentioning

confidence: 99%

Computer-Assisted Orthopedic Surgery: Current State and Future Perspective

2015

View full text Add to dashboard Cite

Introduced about two decades ago, computer-assisted orthopedic surgery (CAOS) has emerged as a new and independent area, due to the importance of treatment of musculoskeletal diseases in orthopedics and traumatology, increasing availability of different imaging modalities, and advances in analytics and navigation tools. The aim of this paper is to present the basic elements of CAOS devices and to review state-of-the-art examples of different imaging modalities used to create the virtual representations, of different position tracking devices for navigation systems, of different surgical robots, of different methods for registration and referencing, and of CAOS modules that have been realized for different surgical procedures. Future perspectives will also be outlined.

show abstract

Preoperative assessment and evaluation of instrumentation strategies for the treatment of adolescent idiopathic scoliosis: computer simulation and optimization

Cited by 17 publications

References 25 publications

Correction objectives have higher impact than screw pattern and density on the optimal 3D correction of thoracic AIS: a biomechanical study

Correction objectives have higher impact than screw pattern and density on the optimal 3D correction of thoracic AIS: a biomechanical study

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

Computer-Assisted Orthopedic Surgery: Current State and Future Perspective

Contact Info

Product

Resources

About