Mindblown: a blog about philosophy.
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Plaster
A gypsum material that hardens when mixed with water, used for making impressions and casts. Poultice. A white powder which is mixed with water and used to make a solid support to cover a broken limb. Adhesive tape used in shaped pieces or as a bandage to keep a dressing in place. A material, usually…
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Plasmid
A circular DNA molecule that is maintained separately from the cell’s chromosomal DNA and is capable of replicating itself. Plasmids are found mainly in bacteria and also in some eukaryotes, and may encode genes for antibiotic resistance. An autonomously replicating, extra-chromosomal DNA molecule found in many bacteria. Plasmids are widely used as carriers of cloned…
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Plasma‐sprayed implant
Dental implant with a plasma‐sprayed surface.
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Plasma spray
Method of attaching material to the surface of a structure such as an implant body. The coating is produced by heating the sintered coating material in an argon environment at extremely high temperatures (>15 000 °C). The most common plasma spray coatings are titanium and hydroxyapatite plasma sprays.
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Plasma‐containing growth factor
Insulinlike growth factor 1 (IGF‐1) is the major growth factor derived from human plasma and found in a variety of tissues and organs including bone matrix.
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Plasma cell
Antibody‐producing B lymphocyte that has reached the end of its differentiation pathway. Plasma cells are oval or round with extensive rough endoplasmic reticulum, a well‐developed Golgi apparatus, and a round nucleus. Principal effector cell involved in humoral immunity. Called also plasmocyte or plasma B cell. A type of white blood cell that produces antibodies. Derived…
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Plaque control
Preventive measures directed to remove/control dental plaque and prevent it from recurring.
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Plaque
An organized mass, consisting mainly of microorganisms, that adheres to teeth, prostheses, and oral surfaces and is found in the gingival crevice and periodontal pockets. Other components include an organic, polysaccharide‐protein matrix consisting of bacterial by‐products such as enzymes, food debris, desquamated cells, and inorganic components such as calcium and phosphate. A clear zone in…
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Planning software
Computer program specifically designed for use with virtual surgical planning and guided surgery.
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Placebo
An inactive substance resembling one having therapeutic value; used in controlled studies to determine the effect of drugs without the influence of bias. A substance with no medicinal effect, used as a control in testing new medicines. A material without pharmacological activity but identical in appearance to an active drug. Used in pharmacological research as…
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