POTTING OF SPECIMENS - PowerPoint PPT Presentation

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POTTING OF SPECIMENS

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  1. POTTING OF SPECIMENS • Introduction • Objective • Requirements • Procedures Department of Orthopaedic Surgery

  2. Introduction • Explanation to steps and methodology in potting of specimens. • A general guide to the plotting style. Department of Orthopaedic Surgery

  3. Introduction • Potters are to follow - the potting steps in sequence - all safety instructions . Safety is everyone’s responsibility … back to Index Department of Orthopaedic Surgery

  4. Objective Main Objective in potting: Hold specimens securely in proper jigs and fixtures for biomechanical testing. … back to Index Department of Orthopaedic Surgery

  5. Requirements Before the start of the any job, it is a good practice with a checklist to ensure all essential tools are available and in good conditions Department of Orthopaedic Surgery

  6. Requirements Tool Listings: • Dental cement solution and powder • Paper cups • wood stirrers • Jigs and fixtures to contain the specimen • Set of screws (self-tapping) • Specimens • Screws drivers • Hand drill and drill bits • Personal Protective Equipment (PPE) • Masking Tape • Paper … back to Index Department of Orthopaedic Surgery

  7. Procedures • Thaw the specimens • Remove soft tissues from site of the bone that requires screw and dental cement attachment. CAUTION Department of Orthopaedic Surgery

  8. Procedures 3. Attach screws in a way that properly holds the specimens and prevents slipping during the testing process. - attaching the self taping screw to the bottom end of the bone. - space and distribute the screws evenly - ensure dental cement can completely cover the holding area Department of Orthopaedic Surgery

  9. Procedures • Drilling or sharp pointer ice pick assist in placing the screw Department of Orthopaedic Surgery

  10. Procedures In any drilling operation WARNING Department of Orthopaedic Surgery

  11. Procedures 4. Select suitable - Screw size and driver Attach screw to specimen Ensure proper engagement Department of Orthopaedic Surgery

  12. Procedures 5. Clear jig off oil, grease and other containment. Ensure: >=3 bolts are in placed specimen in place Department of Orthopaedic Surgery

  13. Procedures 6. Attach masking tape to side wall Prevents leakage of cement fluid to threaded area Department of Orthopaedic Surgery

  14. Procedures 7. Specimen should be potted in a stable position and on a level ground. 8. Any mixing of chemicals should be carried out in the fume hood. Proportion of mixture 1 portion of fluid : 2 Portion of powder Department of Orthopaedic Surgery

  15. Procedures WARNING Department of Orthopaedic Surgery

  16. Procedures 9. Pour mixture into jig and wait for mixture to solidify. WARNING Department of Orthopaedic Surgery

  17. Procedures 10. Clear off any side spill Ensure all screws are well conceal in the fluid level. Department of Orthopaedic Surgery