Learning Objectives:

1. Explain the biological and mechanical principles of plate, or shell  bone grafting including stability, space maintenance, vascular access and tension free closure.
2. Compare the traditional autogenous Khoury plate technique with an allogenic cortical plate approach, including the different biological, procedural and patient-centred considerations.
3. Identify defects and patient factors that may favour an allogenic plate, particularly localised one-wall buccal defects requiring a rigid support, limited or unsuitable donor sites, or refusal of autogenous plate harvesting.
4. Describe the clinical workflow: hydration, thinning, shaping, stable fixation, positioning, particulate grafting and soft tissue closure.
5. Discuss the advantages, limitations and complications of this approach and critically interpret integration, remodelling and resorption observed in clinical follow-up.