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Restorative Dentistry

Composite restorations: how could matrixing and contact be less challenging?


This question was submitted by a general dentist: Matrixing and contact can be a task with composite restorations. Do you have any recommendations that would make this process less challenging?

This summary response is based on the JCDA Express (June 2012 Edition) by Dr. Dorothy McComb: Restoring Proximal Contacts with Composite Resin Restorations

Dr. Dorothy McComb is the former Head of Restorative Dentistry at the University of Toronto, Faculty of Dentistry

The series of 4 articles review the clinical challenges of class ΙΙ posterior composites and address common clinical concerns with proximal contact tightness. 

Key Messages

  • The use of interdental separators provides tight proximal contacts
  • Composite restorations placed with a combination of sectional matrices and separation rings results in tighter proximal contacts
  • The use of a circumferential matrix system and wedge are not likely to produce adequate contact tightness
  • Should a circumferential matrix system be used, it is recommended to use interdental separators in place of wedges
  • Mesial drift will not close loose contacts of posterior composite restorations.


McComb, D. (2012). Restoring Proximal Contacts with Resin Restorations. JCDA Express, Issue 2.


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