• Size 1: 1.3 mm
• Size 2: 1.5mm
• Size 3: 1.75mm                  

• Insert the Contec fiber post into the prepared root canal to test the fit and check the biting position.
• Mark the required post height (occlusion height) on the post.

Post Shortening:

• Remove the post from the root canal.
• Shorten the post extraorally using a fine diamond wheel. Use sharp instruments to avoid creating dust and moisten the post during cutting.

Cleaning and Preparation:

• Clean the Contec fiber post with alcohol to remove any contaminants.
• Dry the post thoroughly using warm air.

Preparing the Root Canal:

• Condition the dentin using an adhesive technique:
  • Apply 37% phosphoric acid to the root canal and cavity, then rinse with water.
  • Rinse the canal with alcohol (e.g., 70%) and dry it using paper tips.
  • Apply the primer and absorb excess with paper tips.
  • Apply the bonder and absorb excess with paper tips. Do not polymerize the bonder with light.

Composite Application:

• Optionally, apply a thin layer of dual-polymerizing bonder without polymerizing it with light.
• Apply low-viscosity, dual-polymerizing, X-ray visible composite into the root canal using a lentulo spiral, following the manufacturer's instructions.

Post Insertion:

• Apply composite quickly to the Contec fiber post.
• Insert the post immediately and slowly into the root canal, turning it slightly to ensure even distribution of composite and secure placement.
• Hold the post in position until the composite hardens sufficiently to secure the post firmly.

Finishing:

• Distribute any excess composite evenly around the protruding post and cavity.
• Remove remaining excess composite carefully.

Curing:

• Use a polymerization lamp to cure the composite for approximately 40 seconds, following the instructions for use related to the composite material.

Final Restoration:

• Complete the final restoration quickly using a viscous core composite.
• Use a transparent plastic shell (frasaco) or matrix band if necessary to shape the restoration accurately.