Comparing 3D-printed implants to bone grafts for orbital reconstruction

Inclusion Criteria:

* Patient between 18 to 90 years old
* Presenting a defect in the bone substance of an orbital wall (floor, lateral or medial): at least 6 months following a oncologic surgery (in particular meningioma or carcinoma of the upper aerodigestive tract) OR post-traumatic;
* With a defect of the unilateral orbital bone substance described as complex on the CT-scan: fracture in the posterior third of one walls; fracture extended to two walls (floor and lateral wall, or medial wall and orbital floor); comminutive fracture of at least one of the walls; fracture with more than half of one of the walls tipped over;
* Presenting an enophthalmos ≥ 3 mm OR an enophthalmos ≥ 2mm with diplopia;
* Patient with a programmed orbital reconstruction;
* For patients who have had oncologic surgery, validation of a multidisciplinary consultation meeting;
* Whose contralateral orbital anatomy is healthy (absence of : bone defect, diplopia, ptosis or other condition affecting aesthetics);
* Patient who gave its written informed consent to participate to the study;
* Affiliated to a social insurgence regime or similar.

Exclusion Criteria:

* Defect of bone substance extended to the upper and / or intermediate floors of the skull-base;
* For patients who have undergone oncologic surgery, patients with uncontrolled cancer proliferation;
* Defect of bone substance from the skull vault;
* Osteo-meningeal Breach;
* Patient whose understand the French questionnaire EQ-5D-3L;
* Follow up not possible during 18months (judgement of investigator)
* Patient with hypersensitivity to metallic materials;
* Major patient protected by the Law;
* Pregnant or breastfeeding woman