Category: R
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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.
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Ruffini receptor
Highly sensitive nerve ending of the periodontium in close approximation with collagen fibers that allow refined proprioception around teeth.
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RTV (abbrev)
Removal torque value (reverse torque value).
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RTT (abbrev)
Reverse torque test.
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RPM (abbrev)
Revolutions per minute.
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RPI (abbrev)
Rest, proximal plate, and i‐bar; the clasp components of one type of partial removable dental prosthesis clasp assembly.
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RPD (abbrev)
Removable partial denture (now termed a partial removable dental prosthesis).
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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.
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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…
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Rouge
A material made of ferric oxide and binding agents used for polishing and thereby imparting luster to a surface.