Orbital wall fractures can result in increased orbital volume, tissue herniation into the maxillary sinus, fat atrophy, loss of ligament support, and scar contracture leading to enophthalmos and diplopia. Reconstruction of large defects remains challenging since anatomical landmarks are lost, particularly the posteromedial orbital bulge and orbital apex.
Two Piece Orbital Floor
Unfortunately nowadays standard pre bend meshes are used and often leave unsatisfied results.
PSI placement over failed pre bend mesh
To design implants for orbital reconstruction, rapid prototype models can be derived from Digital Imaging and Communications in Medicine (DICOM) data obtained from the patient’s computed tomography (CT) scan. The model is used to create the implant by mirroring data from the unaffected orbit, and reconstruction is performed with prebent plates. Although this technique is not commonly used, advantages include a true-to-original anatomical repair, restoration of orbital volume, and superior ophthalmological rehabilitation when evaluating for binocular single vision and ocular motility. From a surgical point of view, insertion is simplified by the precise fit, and no operating time is wasted in shaping the implant.
Mirror Orbital Floor
Left orbit was used to reconstruct the orbital floor on the defect side.
Lateral patient specific implant
Lateral implant placement.
Medial patient specific implant
The puzzle-like interlocking of the implant pieces allows unambiguous anteroposterior positioning of one piece relative to the other. Overlapping edges of the connection provide an interlock in the coronal plane,