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Crevicular epithelium. The nonkeratinized epithelium of the mucosal sulcus surrounding dental implants and teeth. The nonkeratinized epithelium that lines the gingival sulcus.  

The percentage of successes of a procedure or device (e.g., dental implant) in a study or clinical trial according to success criteria defined by the study protocol.  

Condition established to determine whether data have satisfied their objectives and met the requirements for success.  

Subtracted surface. Alteration of a dental implant surface by removal of material.  

Conventional machining is a form of subtractive manufacturing, in which a collection of material‐working processes use powerdriven machine tools, such as saws, lathes, milling machines, and drill presses. These are used with a sharp cutting tool to physically remove material to achieve a desired geometry.  

Manipulation of a radiograph photographically or digitally where background images are eliminated to highlight areas for comparison.  

Implant surface created through removal of material by exposure to acid, abrasives, or electrolysis. Subtractive process generally creates roughness intended to enhance cell proliferation and osseointegration.  

Duration of time a chemical is in contact with a particular substrate; protracted release of a chemical. Related to clearance of a chemical. The ability of tissue to absorb an active ingredient and release it slowly over a period of time.  

A bony fracture occurring beneath the periosteum, without displacement.  

Dental prosthesis metal framework that is supra‐gingival in location and provides support for artificial teeth and/or denture base material that fits onto the subperiosteal implant abutments.