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In dentistry, the configuration factor (also known as c-factor) refers to the number of bonded to unbonded surfaces in a tooth preparation. For instance, in an Occlusal class I preparation there would be 5 bonded surfaces and only 1 unbonded surface. The net result would be a C factor of 5. As the C factor increases so to does the possibility of bond disruption when using a composite resin. This effect is caused by a reduction in unbonded surfaces in which the composite can "flow" to relieve polymerization stress. The technique of incremental layering has been suggested to compensate for preparations with high configuration factors.

  Last1 Roberson
  First1 Theodore
  Last2 Haymann
  First2 Harold
  Last3 Swift
  First3 Edward
  Title Sturdevant's Art and science of Operative Dentistry
  Publisher Mosby
  Place St Louis, Missouri
  Year 2002