3D-Printed Patient-Specific Instrumentation Technique Vs. Conventional Technique in Medial Open Wedge High Tibial Osteotomy: A Prospective Comparative Study

Table 1

Demographic characteristics of the two groups.

	3D-printed PSI ()	Conventional ()	value
Age, years			n.s
Sex (male : female)	4 : 14	5 : 14	n.s
Right : left	11 : 7	13 : 6	n.s
BMI			n.s
ROM (°)			n.s
mFTA (°)			n.s
mMPTA (°)			n.s
mLDFA (°)			n.s
OA Kellgren–Lawrence grading (I : II : III)	2 : 8 : 8	4 : 5 : 10	—
Planned wedge opening (mm)			n.s
Meniscus injury ()	7	8	n.s
ACL injury ()	2	3	n.s

Abbreviations: 3D: three-dimensional; PSI: patient-specific instrumentation; SD: standard deviation; n.s: not significant; BMI: body mass index; ROM: range of motion; mFTA: mechanical femorotibial angle; mMPTA: mechanical medial proximal tibial angle; mLDFA: mechanical lateral distal femoral angle; OA: osteoarthritis; ACL: anterior cruciate ligament.