Osteotomy Accuracy and Clinical Efficacy Analysis of 3D-Printed Patient-Specific Instrumentation Assisted High Tibial Osteotomy
Wang Dong
Liu Kailun
Li Ming
Lin Lipeng
Wang Qingjun
Wang Baobin
Fu Kaifeng
Lv Yan
Abstract：Objective To evaluate the osteotomy accuracy and clinical efficacy of 3D-printed patient-specific instrumentation(PSI)assisted high tibial osteotomy(HTO)in the treatment of varus knee osteoarthritis(KOA).Methods Sixty-nine patients(34 male,35 female;age 45～69 years,mean 59.36±5.96 y)who underwent HTO for KOA between October 2024 and April 2025 were prospectively enrolled and divided into a PSI group(n=29)and a conventional instrumentation(CI)group(n=40).Osteotomy accuracy was assessed by comparing pre-operative planning targets with post-operative measurements of the hip-knee-ankle(HKA)angle,weight-bearing line percentage(WBL)and medial proximal tibial angle(MPTA).Clinical outcomes were compared using the number of intra-operative fluoroscopic images,drainage volume and knee injury and osteoarthritis outcome score(KOOS).Results After a minimum follow-up of 3 months,post-operative HKA,WBL and MPT A in the PSI group did not differ significantly from the planned targets(P＞0.05).The absolute deviations(Δ)of HKA(1.76±2.11)°,WBL(5.66±4.94)％and MPT A(0.63±0.72)° were significantly smaller than those in the CI group[(3 22±2.89)°,(9.67±7 20)％,(2.78±1.90)°,respectively;P＜0.05].KOOS sub-scores at 1 and 3 months showed no inter-group differences(P＞0.05).The PSI group required fewer fluoroscopic images and had less drainage than the CI group(P＜0.05).Conclusion 3D-printed PSI improves the accuracy of coronal alignment during HTO,reduces intra-operative fluoroscopy and blood loss,and offers a safer alternative to conventional instrumentation.
Keywords：three-dimensional printingpatient-specific instrumentationhigh tibial osteotomyosteotomy accuracy
Publication Date：2025-10-25
Online Publishing Date：2025-11-11(First online date of this platform, not the publication date of the document)
Pages：6( 926-931 )