Mechanical properties of new composite restorative materials

Abstract

The condensable composites differed significantly in their mechanical properties. This study suggested that, besides the filler content level and filler size, other factors like matrix-filler interactions highly influence the fracture and wear behavior of the materials.

Investigation of the correlation between the different mechanical properties of resin composites

“…3). This result is in agreement with that of the previous reports which show significant correlation coefficients for the FS-FT relation (r=0.53-0.88) 30,35,39,50) . However, the FT value was severely affected by precraking condition and test variables 26,55,65) , and hence the relationship between FS and FT may need further verification.…”

“…In this study, the BH was measured by using a newer digital tester mounted on the test stand, which possibly resulted in an increased sensitivity of the measurement, although the degree of resultant surface damage was not discernible. In this study, the correlations between all the hardness values and the FS values of the investigated composites were poor, while good correlation between HV and FS was found in the previous literature data 15,35,50) . This result might be attributed to the fact that the hardness measurements were performed at 20 min after curing; and the specimens were not fully cured.…”

“…In the experimental composites with the same matrixfiller system, the correlation between Vf and FS was significantly strong 12) . However, for the commercial products, other studies showed a very low or no correlation between V f and FS 16,41,[50][51][52][53] , although one report revealed a good correlation (r=0.86, n=14) 35) . Even the FS value measured by a four-point flexural test showed no correlation (r=0.02) with V f, while there was a significant correlation (r=0.89) between FM and V f 54) .…”

“…Although in all these studies, the materials were tested according to ISO 4049, contradictory trends were observed in the FS-FM relationship among composite materials; one group showed a high linear correlation ( Fig. 1a; r=0.82-0.94, overall r=0.79) 15,35,50,62) and the other group showed a low linear correlation (Fig. 1b; r=0.1-0.5, overall r=0.30) 16,51,52) between FS and FM including this study.…”

In-situ polymerisation of fully bioresorbable polycaprolactone/phosphate glass fibre composites: In vitro degradation and mechanical properties

“…Fully bioresorbable polymer composites provide a highly attractive opportunity to improve and replace traditional metal implants and are an active research field due to their potential use in load-bearing applications. Biocompatibility of both PCL (approved by FDA) and of phosphate based glass fibre (PGF) has been well investigated and both are known to be bioresorbable, which makes these materials favourable candidates for bone repair applications [3][4][5][6]. Most recently, PGF has been used as reinforcement for developing fully bioresorbable polymer composites [2,7,8].…”