Structural allografts are a surgical option only in cases of severe bone loss. Structural allografting techniques have been developed to fill large bony defects and can be used to provide structural support and reconstitute bone stock. Superior dome allografts are utilized when 50% or more of host bone is available for contact with the ingrowth cup. In revision surgery where the allograft supports more than 50% of the reconstruction, complications are more common. Although good results are reported, implant failure and graft resorption are more commonly seen. The addition of a reconstruction ring to the reconstruction unloads some of the stress applied to the allograft. In these cases, superior results have been reported.