Material

Features

IN VIVO Reaction

METAL

· Easy to assess changes on conventional X-ray

· Greater pull-out strength

High biocompatibility;

Difficult in revision case

Interference with MRI

PGA

· Bioabsorbable

· Rapid resorption

Hydrolysis of the polymer, cleared by local

macrophages which resulted in lytic bone changes

PLLA

· Bio absorbable

· Slow resorption (up to 5 years)

Change in molecular weight and crystallinity,

reduction mechanical properties of the anchor and

failure due to breakdown

TCP

· Bio absorbable

· Mineral content similar to the natural bone

Macroporosity and microporosity conducive to osteoconductivity, compressive strength,

dissolution, and biocompatibility

PEEK

· Non-biodegradable

· Resistant to chemical, thermal and radiant agents

Inert; High strength, radiolucent can be drilled out in revision cases

ALL-SUTURE

· Soft

· Small size

· A minor removal of the bone during the creation of the pilot hole

· Reducing the risk of pullout

Reduced risk of adverse reactions; non interference with MRI; less complex revisions