Oral rehabilitation by dental implants in the severely atrophic maxilla often represents a challenge. To overcome this difficulty, bone augmentation procedures such as sinus augmentation, guided bone regeneration (GBR), or distraction osteogenesis have been used to obtain adequate bone height and width for proper three-dimensional implant placement. To avoid surgical morbidity and shorten treatment length, alternative methods such as short or tilted implants, as well as zygomatic implants (ZIs),have been proposed and have shown promising outcomes.
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change of function of the masticatory muscles
Timeframe: baseline & 6 month after the delivery of the prothesis