Application of 3D printed guide plate in tibial osteotomy for neoplastic long bone deformity
Objective:To investigate the clinical effect of 3D printed guide plate in tibial osteotomy for neoplastic long bone deformity.Methods:Clinical data of 52 patients with neoplastic long bone deformity who were treated with osteotomy and orthopaedic internal fixation using 3D printed guide plate from June 2021 to December 2022 were retrospectively analyzed.Full-length radiographs were taken at the standing position of the lower limbs and anterolateral radiographs at the bearing position before surgery and 1 week after surgery.The weight bearing line(WBL)ratio,joint line conergence angle(JLCA)of the lower limbs,medial proximal tibial angle(MPTA),and posterior tibial slope(PTS)were measured.Limb function was evaluated by Lysholm score before surgery,6 months after surgery and 1 year after surgery.Results:The lower limb deformity was effectively corrected in all the patients.Compared with preoperative ones,WBL and MPTA were significantly increased 1 week after surgery(t=-7.294,P＜0.05;t=-4.153,P＜0.05),JLCA was significantly decreased(t=-1.463,P＜0.05),and PTS had no significant changes(t=2.284,P＞0.05).Lysholm score at 6 months and 1 year after surgery was significantly higher than that before surgery(t=-5.087,P＜0.05;t=-3.237,P＜0.05),and there was no significant change at 6 months after surgery compared with 1 year after surgery(t=1.245,P＞0.05).Conclusions:The use of 3D printed guide plate to assist osteotomy and orthosis of neoplastic long bone deformity can effectively correct lower limb alignment and improve knee joint function.
Bone TumourLong BoneDeformity3D PrintingOsteotomyOrthosis
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