This study used finite element (FE) analysis to investigate the stability of miniscrews (screws) placed at the median palate. FE models with variable suture maturity and screw-suture distances were used to examine the relationship with screw stability. Four groups were classified by extent of maturation of the midpalatal suture (0%, 60%, 75%, and 100%). The placement position was set at the center of the suture (0.0 mm), or 0.5, 1.0, and 1.5 mm to the side of the suture, and von Mises stress values in bone and screw displacement were compared among models. The stress value for the unsutured model, in which the screw was placed at the center of the suture, was greater than 30 MPa. Stress values for models in which screws were placed to the side (0.5-1.5 mm) were less than 28 MPa. Maximum screw displacement was greater in the 0.0-mm incomplete suture model than at other placement positions. Because bone conditions vary among patients, placement position and suture maturation should be examined on cone beam-computed tomography images, to ensure screw stability.

这项研究使用有限元（FE）分析来研究置于中颚上的小螺钉（螺钉）的稳定性。使用具有不同缝合线成熟度和螺钉缝合距离的有限元模型来检验其与螺钉稳定性的关系。按pal中缝线的成熟程度将其分为四组（0％，60％，75％和100％）。将放置位置设置在缝合线的中心（0.0毫米），或在缝合线侧面的0.5、1.0和1.5毫米处，并比较模型之间的骨头和螺钉位移的von Mises应力值。未缝合模型的应力值大于30 MPa，在该模型中，螺钉位于缝合线的中心。将螺钉放在侧面（0.5-1.5毫米）的模型的应力值小于28 MPa。最大螺丝位移为0。与其他放置位置相比，0毫米不完全缝合模型。由于患者的骨质状况各不相同，因此应在锥束计算机断层扫描图像上检查放置位置和缝合线成熟度，以确保螺钉的稳定性。