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World J Orthop. Sep 18, 2025; 16(9): 108931
Published online Sep 18, 2025. doi: 10.5312/wjo.v16.i9.108931
Table 1 Comparison of common interbody cage options for spinal fusion
Cage type
Material
Osseointegration
Elasticity
Radiolucency
Subsidence risk (theoretical)
Standard PEEK cagePEEKInertBone-likeExcellentLow
Porous titanium/three-dimensional-printed titanium cageTitanium alloyExcellentHigherFair/poorModerate
PEEK-titanium composite cagePEEK, titaniumModerate/goodVariableGoodLow/moderate
Expandable cageTitanium, PEEK, or bothVariableVariableVariableVariable
Double-cage constructPEEK, PEEK-titanium compositeModerate/goodVariableGoodPotentially low