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e-TMJ replacement: Clinical analysis27310underwent resection with microvascular fibula flap reconstruction of the mandibular defect and this also had failed. By the time we saw the patient, there was extra bony ankylosis of the TMJ and extra‑ and intra‑oral fistulization. Intravenous and prolonged peroral antibiotic treatment eradicated the infection.Segmentation of the CT DICOM dataset was performed using Mimics inPrint 3.0 (Materialise, Leuven, Belgium), with repositioning of the residual mandible using ProPlan CMF (Materialise, Leuven, Belgium). The latter needed a repositioning osteotomy on the left.(Fig. 5) eTMJR and unilateral sagittal osteotomy were thereby performed simultaneously. Malunion, plate fracture, and cranial rotation of the left-sided proximal segment necessitated revision surgery using an iliac bone graft and comprehensive intraoral plating during a second surgical session, at which time root implants were placed in the anterior mandible. Blood analysis did not show any abnormalities of bone metabolism. The patient received an additively manufactured subperiosteal jaw implant under general anesthesia during a third operation and is currently undergoing prosthetic rehabilitation.Fig. 5: Case # 3. (A) Surface tesselation language render with the arrow indicating the defect. (B) Surface tesselation language render with planned rotational repositioning of the mandible. The arrow indicates the sagittal split osteotomy contralateral to the extended temporomandibular joint replacement. (C) Orthopantomogram demonstrating an osteosynthesis plate fracture (arrow). (D) Orthopantomogram demonstrating extensive osteosynthesis and iliac bone grafting (1), root-shaped dental implants (2), and an additively manufactured subperiosteal jaw implant (3) one has the impression that mandible was splitted at a higher position than indicated in B. This is due to the fact that the proximal segment rotated anterocranially because of the malunion and because of the projective geometry of orthopantomogram technologyNikolas de Meurechy NW.indd 273 05-06-2024 10:15