Abstract
Abstract Placement of zygomatic implants lateral to the maxillary sinus, according to the extra-sinus protocol, is one of the treatment options in the rehabilitation of severely atrophic maxilla or following maxillectomy surgery in the head and neck cancer patients. The aim of this study was to investigate the mechanical behaviour of a full-arch fixed-prosthesis supported by four zygomatic implants in the atrophic maxilla under occlusal loading. Results indicated that maximum von Mises stresses were significantly higher under lateral loading compared with vertical loading within the prosthesis and its supporting implants. Peak stresses concentrated at the prosthesis/abutments interface under vertical loading and the internal line angles of the prosthesis under lateral loading. The zygomatic supporting bone suffered significantly lower stresses. However the alveolar bone suffered comparatively higher level of stresses particularly under lateral loading. Prosthesis displacement under vertical loading was higher than under lateral loading. The zygomatic bone suffered lower stresses than the alveolar bone and prosthesis/implant complex under both vertical and lateral loading. Lateral loading caused a higher level of stresses than vertical loading.
| Original language | English |
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| Journal | JOURNAL OF ORAL IMPLANTOLOGY |
| DOIs | |
| Publication status | E-pub ahead of print - 5 Sept 2013 |
