Types of pins
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Types of pins

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    Types of pins Types of pins Presentation Transcript

    • Types of pins 
      By
      Amin Ambusallamah
    • TYPE OF PINS
      Cemented
      Friction – locked pins
      Self-threading pin (TMS)
    • Cemented pin
      Larger than other pin.
      Use Zn Ph cement or Zn Polycarp cement.
    • Friction – locked pins
      Smaller.
      Retained by resilience of dentin ↑ retentive than cemented pin.
      With ttme denttiin relax -> loose pin.
    • Self-threading pin (TMS)
      Different size
      Threads engage dentin
      Depend on elasticity of dentin
      Most retentive (3-6 times)
      No corrosion (gold plated)
      Create horizontal & vertical stress
      Cause dentinal craze line (size of pin)
    • Pin Thread mate system
      Regular 0.031 inch diameter
      Minim 0.024 inch diameter
      Minikin 0.019 inch diameter
      Minuta 0.017 inch diameter
    • Pin Thread mate system
      Available in:
      Double shear (two pins in one)
      Gold plated, stainless steel or titanium alloy
      Inserted manually or with low speed, latch-type hand piece
    • Thank you
      Reference : Art and science of operative dentistry 2000chapter ……. 19pages ………. 771 -772