Two groups of patient with horizontally deficient anterior maxilla indicated for bone augmentation ,one will be subjected to autogenous onlay bone block from retromolar bone and the other to cortical shell from retromolar bone also.
Patients in both sex with partial edentulism of the maxilla and requiring horizontal ridge augmentation
The ages of the patients ranged from 20 to 60 years.
The residual ridge width in these patients are less than 4.m
Sufficient bone in intra-oral donor sites are available (external oblique ridge)
Subjected to irradiation in the head and neck area less than 1 year before implantation.
Poor oral hygiene and motivation.
Uncontrolled diabetes.
Pregnant or nursing.
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Egypt