الفهرس 
Causes of maxillectomy:-
1. Partial maxillectomyOnly 14 pages are availabe for public view
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Abstract
Objectives The objective of this study was to analyze the stress distribution in maxillary bone around dental implants for different designs of implant retained obturator in cases of midline maxillary defect using a 3-dimensional finite element analysis.Methods A model of edentulous patient with unilateral maxillectomy is transferred to digital (CAD) model using 3 D digitizer called (3D coordinate measuring machine), Finite element models were formed using ABAQUS package, creating 6 models rehabilitated with different designs of implant retained obturator prostheses using different attachment types with varying number of dental implants in the alveolar bone on the unaffected side, the first group: (3 implants with ball& socket, magnet and bar & clips), the other group (2 implants with the same different types of attachments). A 100 N load was applied bilateral vertically and unilateral vertically and obliquely on the defect side, and von Mises stresses in the cortical bone around implantswere evaluated and compared.