Configuration factor
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In dentistry, the configuration factor refers to the number of bonded surfaces to un-bonded surfaces in a Dental restoration/tooth preparation. For example. for a class I preparation there would be 5 bonded surfaces and only 1 un-bonded surface; the net result would be a c-factor of 5. As the C factor increases so too does the retention power when using a Dental composite. [citation needed], however, the marginal leakage will also increase
Internal stress can be reduced in a restoration subject to potentially reduce high disruptive contraction forces by using:
- "soft-start" polymerization instead of high-intensity light curing.
- incremental layering to reduce the effects of polymerization shrinkage; and
- a stress-breaking liner, such as filled adhesive, flowable composite, or resin-modified glass ionomers.
References
- Roberson, Theodore; Haymann, Harold; Swift, Edward (2002), Sturdevant's Art and science of Operative Dentistry, St. Louis, Missouri: Mosby
- Feilzer, Albert J; de Gee, Anton J; Davidon, Carel L (1987 Nov;66(11):1636-9.), Setting stress in composite resin in relation to configuration of the restoration., J Dent Res.
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