POTTING OF SPECIMENS

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 everyones responsibility

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Department of Orthopaedic Surgery
4
Objective

• Main Objective in potting
• Hold specimens securely in proper jigs and
  fixtures for biomechanical testing.

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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

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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

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7
Procedures

• Thaw the specimens
• Remove soft tissues from site of the bone that
  requires screw and dental cement attachment.

CAUTION
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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
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Procedures

• Drilling or sharp pointer ice pick assist in
  placing the screw

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Procedures

• In any drilling operation

WARNING
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Procedures

• 4. Select suitable
• - Screw size and driver
• Attach screw to
• specimen
• Ensure proper
• engagement

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Procedures

• 5. Clear jig off oil, grease and other
  containment.
• Ensure
• gt3 bolts are in placed specimen in
• place

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Procedures

• 6. Attach masking tape to side wall
• Prevents leakage of cement fluid to
• threaded area

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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

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Procedures
WARNING
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Procedures

• 9. Pour mixture into jig and wait for mixture
• to solidify.

WARNING
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Procedures

• 10. Clear off any side spill
• Ensure all screws are well conceal in
• the fluid level.

Department of Orthopaedic Surgery