Dental Update Posterior article By Dr Burgess and Prof Hassall

The Bioclear Method in Posterior Restorations: Modern Techniques for Better Outcomes

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Context: Posterior composite restorations are increasingly common as amalgam use declines. However, traditional methods often result in poor contact points, fractures, or sensitivity. The Bioclear Method offers a modern and systematic solution with better clinical outcomes.

Key Objectives for Posterior Composites

  • Strong, reliable contact points
  • Long-term marginal integrity
  • Reduced post-op sensitivity
  • Natural aesthetics
  • Fracture prevention

Core Features of the Bioclear Method

1. Biofilm Removal

  • Essential for long-term bond integrity
  • Use 100-micron aluminium trihydroxide at 90 PSI to remove contamination

2. Modern Cavity Design (Clark Design)

  • Uses radius bevels to reduce internal stress and improve bond strength
  • Applies ICE principles:
    • Infinity margins
    • Compression-based joints
    • Enamel-driven bonding

3. Anatomical Bioclear Matrices

  • Biofit Mylar matrices enhance emergence profiles and enable deeper curing
  • Seat subgingivally to reduce finishing and ensure proper contact points
  • Available in 50μm and 75μm HD (heavy-duty) versions

4. Warm Injection Moulding

  • Preheated composites improve adaptation and reduce voids
  • 3M Filtek One Bulk Fill is recommended for low shrinkage and deeper cure
  • Creates monolithic restorations with minimal internal stresses

5. Rockstar Polish

  • Two-step finishing system yields high gloss and long-term wear resistance

Bioclear posterior composite restoration clinical example

7-Step Technique for Predictable Class II Contacts

  1. Pre-Wedging: Start with diamond wedge for tooth separation
  2. Cavity Preparation: Use radius bevels and rounded internal angles
  3. Adjust Neighbouring Tooth: Shape adjacent tooth with discs to enable broad contact
  4. Matrix Selection and Placement: Ensure proper marginal ridge height and contact zone
  5. Wedge Placement: Stabilizes matrix and preserves emergence profile
  6. Twin-Ring Placement: Applies 4–6 lbs of separation force
  7. Spot Welding: Flowable composite used to secure matrix to cusp corners

Bulk Fill & Overlay Advantages


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