Biomechanical analysis of maxillary prosthodontic reconstruction using implants after resection for maxillary cancer

Abstract Objective This study analyzed stress distribution of the occlusal force in craniofacial structures around osseointegrated implants and in dental implants when maxillary reconstruction was performed using dental implants after maxillary resection. The resection because of maxillary cancer occur many physical changes such as aesthetic damage, dysarthria, and dysfunction. The patients’ quality of life (QOL) deteriorates by these changes. Methods We constructed a three dimensional solid model using Mimics ® (Materialise) based on Digital Imaging and Communications in Medicine date (DICOM date) of the maxillofacial and cranial bones obtained from a computed tomography (CT) image of a patient with edentulous maxilla. Results The following four defect region patterns were designed; right maxillary molar, hemimaxilla, full maxilla, and normal. Maxillary prostheses were designed with single implant in the zygomatic bone on the affected side and 1–2 implants in the maxillary alveolar bone on the affected or unaffected side based on All-on-4 ® treatment concept system. In case of hemi- and full-maxillary resection, our designs were not effective. Conclusions When planning maxillary prostheses, the chewing ability and denture weight should be considered. We considered that these elements may be improved oral functions after surgery.