Category: R

  • Ruga (pl. rugae)

    Anatomic ridges of soft tissue that are frequently present on the surface in the anterior portion of the hard palate. A fold or ridge, especially in a mucous membrane such as the lining of the stomach.  

  • Ruffini receptor

    Highly sensitive nerve ending of the periodontium in close approximation with collagen fibers that allow refined proprioception around teeth.  

  • RTV (abbrev)

    Removal torque value (reverse torque value).  

  • RTT (abbrev)

    Reverse torque test.  

  • RPM (abbrev)

    Revolutions per minute.  

  • RPI (abbrev)

    Rest, proximal plate, and i‐bar; the clasp components of one type of partial removable dental prosthesis clasp assembly.  

  • RPD (abbrev)

    Removable partial denture (now termed a partial removable dental prosthesis).  

  • Round bur

    Circular bur used to mark a site for an osteotomy or to decorticate bone. It may also be used in the outline of a lateral window access for the purpose of sinus grafting.  

  • Rough implant surface

    Implant surface with a varying degree of macro‐and microirregularity in contrast with a machined or polished, smooth surface. A rough implant surface is generally considered to be superior to a smooth or polished surface in its ability to osseointegrate from both the rate of integration and the relative surface area of bone‐implant contact (BIC). Surface…

  • Rouge

    A material made of ferric oxide and binding agents used for polishing and thereby imparting luster to a surface.