Types of pins

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Types of pins

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

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