Removal of a maxillary tumor with simultaneous placement of intraosseous zygomatic implants

Abstract

The study objective is to report a case of successful placement of intraosseous zygomatic implants for functional and aesthetic rehabilitation of a patient with a maxillary defect resulted from maxillary resection for right-sided stage IIB maxillary sarcoma (сT2N0M0, G3). Materials and methods . A 34-year-old male patient visited a doctor in P.A. Herzen Moscow Oncology Research Institute with complaints of maxillary tumor. During the examination of the oral cavity, we found a dense endophytic tumor in the area of two missing teeth (17 and 18) involving the alveolar process and palatine process of the maxilla. Computed tomography revealed destruction of the alveolar process, lateral, medial, and posterior walls of the maxillary sinus on the right, and tumor invasion into the right iliac fossa, pterygopalatine fossa, and right maxillary sinus. We also observed tumor destruction of the right palatine process of the maxilla. The patient was diagnosed with osteogenic sarcoma. Results. The patient received 4 courses of polychemotherapy with cisplatin and doxorubicin, which resulted in disease stabilization. Then the patient underwent en-block resection of the fragment of the right maxilla with alveolar and palatine processes, fragments of the zygomatic bone, wings of the sphenoid bone on the right side, and adjacent soft tissues. Simultaneously, we placed two zygomatic implants to provide supportfor the maxillary plate denture. To create an additional supporting point, we extracted tooth 11 and installed an implant with external hexagonal connection. Later, we produced and installed a specially designed palatal obturator. Conclusion. Installation of removable dentures supported by implants ensures complete and rapid rehabilitation, allowing a patient to chew, swallow, and speak normally. A palatal obturator on implants supports the soft tissues of the medial face, thus ensuring complete aesthetic rehabilitation.