(1) dentistry metal (usually gold) cast restoration of the occlusal surface of a posterior tooth or the lingual surface of an anterior tooth, the entire surface of which is in dentin without side walls; retention in the anterior tooth is by pins and in the posterior by pins and/or boxes in retentive grooves in the buccal and lingual walls. (2) orthopedics graft applied on the exterior of a bone. (3) orthopedics graft applied to skin in native urethra in hypospadias or stricture repair.