Instrumentation failure following pediatric spine deformity growth-sparing surgery using traditional growing rods or vertical expandable prosthetic titanium ribs

Table 1 Incidence of instrumentation failure

	TGRs	VEPTRs	P
No. of surgeries	544	455	-
No. of IFs	24	18	-
Incidence of IF, %	4.3/surgery	4.0/surgery	0.72
Details of IF, n (%)	- Anchor loosening/dislocation: 15 (62.5) (all cephalad) - Rod breakage: 8 (33.3) - Connector breakage: 1 (4.2)	- Anchor loosening/dislocation: 11 (61.1) (cephalad: 6, caudal: 4, unknown: 1) - Rod breakage: 3 (16.7) - Implant protrusion: 3 (16.7) - Proximal junctional kyphosis: 1 (5.6)	-

IF: instrumentation failure, TGRs: traditional growing rods, VEPTRs: vertical expandable prosthetic titanium ribs

ISSN: 1471-2474