An experimental study on particular physical properties of several interocclusal recording media. Part III: resistance to compression after setting.
OBJECTIVE
The purpose of this study was to evaluate the resistance to compression after setting of several elastomeric interocclusal recording materials.


METHODS
Testing of the resistance to compression after setting was performed following a modification of the method described in specification No. 19 (4.3.6) of the A.D.A., for the elastomeric impression materials-1 cylindrical stainless steel mold with an internal diameter of 20 mm and a height of 20 mm was constructed. Mixing of the interocclusal registration media was conducted according to manufacturers' instructions, and the materials were injected into the mold. Two subsequent loads, one of 100 g/cm2 and a second of 1000 g/cm2 were exerted on each sample. The deformation of each was calculated using a vertical traveling micrometer microscope with an accuracy of +/- 0.001 mm.


RESULTS
One-way ANOVA revealed significant differences among the materials (F=331.58, p <0.0005). Tukey's HSD (p <0.05) test was used to determine the significant differences between the materials.


CONCLUSIONS
Polyvinylsiloxane Blu Mousse displayed the greatest resistance to compression, as compared to other elastomeric interocclusal recording materials tested.
Michalakis
Konstantinos X
KX
Division of Graduate and Postgraduate Prosthodontics, Tufts University School of Dental Medicine, Boston, MA, USA. kmichalakis@the.forthnet.gr
Pissiotis
Argiris
A
Anastasiadou
Vassiliki
V
Kapari
Danai
D
D000704:Analysis of Variance; D019245:Compressive Strength; D003760:Dental Impression Materials / Q000737:chemistry*; D020724:Elastomers / Q000737:chemistry; D007574:Jaw Relation Record / Q000295:instrumentation*; D008422:Materials Testing; D014885:Waxes / Q000737:chemistry; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
D003760:Dental Impression Materials; D020724:Elastomers; D014885:Waxes; D015035:Zinc Oxide-Eugenol Cement