Ultra-High Molecular Weight Polyethylene (marPOR) is a Suitable Material for the Reconstruction of Orbital Floor Fracture Defects in Human Cadavers.

Abstract

<h4>Purpose</h4>Despite there being different materials for orbital floor reconstruction available today, outcomes are still not satisfying. In recent years, ultra-high molecular weight polyethylene (UHMWPE) has gained popularity in the field of orthopedic surgery due to its good biocompatibility and low infection rate. With its three-dimensional compound structure, it combines high stability and ductility, making it a potential material to be used for orbital floor reconstruction.<h4>Methods</h4>In a cadaver study, an overall of eighteen orbits were included. Fractures of the inferior wall were induced and then reconstructed using Polyglactin 910/PDS composite (Ethisorb) and UHMWPE (marPOR). Orbits were scanned by cone-beam CT in each condition: Intact, fractured and reconstructed with Ethisorb, marPOR 0.85 mm and marPOR 1.5 mm. Segmented orbital volumes were calculated by specialized software (Disior bonelogic CMF).<h4>Results</h4>All materials led to sufficient reconstruction of the initial orbital volumes (Ethisorb: <i>p</i> < <i>0.001</i>; marPOR 0.85 mm: <i>p</i> = <i>0.003</i>; marPOR 1.5 mm: <i>p</i> < <i>0.001</i>). Orbits that were reconstructed with marPOR 0.85 mm showed the least mean volume difference from intact orbital volumes.<h4>Conclusion</h4>UHMWPE (marPOR) offers reliable reconstruction of orbital floor fractures combined with good stability, ductility and biocompatibility.