Composite shrinkage stress as a function of specimen dimensions and compliance of the testing system

Influence of the bonding substrate in dental composite polymerization stress testing

“…In the present study, the influence of the testing system compliance on the polymerization stress values agreed with results from previous investigations, regarding the fact that the higher the system's deformability, the lower the stress values obtained [8,11]. The analytical compliance of each component of the testing system can be estimated by using the formula:…”

“…The sum of these deformations is referred to as the system's compliance [8,11,12], expressed in mm N À1 . The higher the compliance, the higher the system's strain capacity is, and therefore the lower the recorded stress values [8,12].…”

“…The contraction force exerted by the composite when both substrates are pulled together is recorded by the load cell. The maximum nominal stress is obtained by dividing the maximum registered load by the cross-sectional area of the rod [8][9][10][11].…”

Placing Dental Composites—A Stressful Experience

“…63 However, the association between constraint and stress generation has proven to be somewhat complex, making it more difficult to make general statements about their effects. 49,64 In part, this is explained by compliance of the testing system or the geometry of the tooth preparation. In fact, investigators have suggested that the testing device compliance be adjusted to mimic that of the actual tooth, to maximize the relevance of the test conditions.…”

Finite element Analysis in Dentistry – Improving the quality of oral health care

“…In dental research, FEA has been used effectively in many research studies. For example, FEA has been used to analyze stress generation during the polymerization process of composite materials and stress analyses associated with different restorative protocols like tooth implant, root post canal, orthodontic approaches (Versluis et al, 1996;Versluis et al, 1998;Ausiello et al, 2001;Lin et al, 2001;Ausiello et al, 2002;Misra et al, 2005;Meira et al, 2007;Witzel et al, 2007;Meira et al, 2010). This chapter will discuss the application and potential of finite element analysis in biomechanical studies, and how this method has been instrumental in improving the quality of oral health care.…”