METHOD FOR MANUFACTURING PREOPERATIVE MODEL OF SPINE IN CHILDREN WITH CONGENITAL DEVELOPMENTAL ANOMALIES AND DEFORMITIES Russian patent published in 2021 - IPC A61B34/10 A61B6/03 

FIELD: medicine; traumatology.

SUBSTANCE: invention relates to the field of medicine, namely to the field of traumatology, it can be used for manufacturing a preoperative model of a spine in children with congenital developmental anomalies and deformities. Multi-spiral computed tomography (MSCT) is performed with 64 cuts per one gantry turn with a cut thickness of 0.625 mm, without the “gantry” slope with a voltage of 120 kV, a current of 175 mA, in a time of 2.2 seconds with a pitch of 0.516:1. Using an overview skenogram with a length of 150-700 mm, multi-planar reconstructions of the image are constructed in two mutually perpendicular planes - the frontal and sagittal. The images reveal the localization, volume and nature of the internal structure of the child's spine. The resulting tomographic information is stored in DICOM format and transferred to Dolphin Imaging. The formation of a solid-state STL 3D model of the spine is performed with the display of all affected bone anatomical structures and spinal anomalies of interest in the preoperative study. According to the STL model data, a G-code is formed. A model of the patient's spine with all its anomalies is printed with a print layer height of no more than 0.2 mm on a scale of 1:1 on an FDM printer. The model of the spine is made of a biologically compatible and non-toxic polymer material. As a biologically compatible and non-toxic polymer material, acrylonitrile butadiene styrene (ABS), or polyethylene terephthalate with glycol (PET-G), or polylactide (PLA), or polyamide are used for the manufacture of the model of the spine. Virtual planning of the stages of surgical treatment of the patient's spine is performed using a manufactured model of the spine or part of it with the determination of the placement points of implants and the malposition of the fixing screws of metal fixation during corrective osteotomy.

EFFECT: method provides for virtual planning of the stages of surgical treatment of the patient's spine with the determination of the placement points of implants and the malposition of the fixing screws of metal fixation during corrective osteotomy due to manufacturing a preoperative model of the spine with the display of all affected bone anatomical structures and spinal anomalies.

2 cl, 4 ex