Application of 3D Printing-Assisted Articulating Spacer in Two-Stage Revision Surgery for Periprosthetic Infection after Total Knee Arthroplasty: A Retrospective Observational Study
Table 3
Comparison of outcomes between the static group and 3D-printed group.
Static group ()
3D-printed articular group ()
value
Interval time (wk)
13.1 (8-24)
12.8 (9-22)
0.75
Interim reinfection rate
1/22
1/20
0.95
Bone loss
22/22
4/20
0.00
Femoral bone loss(mm)
9.6 (5 ~ 20)
1.7 (0 ~ 10)
0.00
Tibial bone loss(mm)
5.5 (0 ~ 10)
1 (0 ~ 5)
0.00
TTO surgery
4/22
0/20
0.04
Second-stage operation time(min)
119 (75~150)
98 (65~135)
0.00
Operation bleeding volume
439 (250~650)
358 (150~600)
0.02
Preoperative KSS
Clinical score
0.28
Function score
0.51
Total score
0.35
Interim KSS
Clinical score
0.00
Function score
0.00
Total score
0.00
Postoperative KSS
Clinical score
0.00
Function score
0.00
Total score
0.00
Mean ROM (degree)
Preoperative ROM
71 (30~110)
73 (23~105)
0.74
Interim ROM
1 (0 ~ 8)
88 (80~100)
0.00
Postoperation ROM
80 (70~110)
94 (80~115)
0.00
Serious joint mobility disorder
5/22
4/20
0.83
Reinfection rate
1/22
1/20
0.95
Satisfaction rate
12/22
18/20
0.01
TTO: tibial tuberosity osteotomy; KSS: knee society score; ROM: range of motion.
