Abstract
Increased ridge resorption may occur due to inappropriate pressure applied during final impression making phase of complete denture fabrication. This study was done to evaluate the pressure applied on the residual ridge while making impressions with two tray designs (with and without spacer) using, zinc oxide eugenol and light body polyvinyl siloxane impression material. Five edentulous subjects were randomly selected. For each of the five subjects four maxillary final impressions were made and were labelled as, Group A-Impression made with tray without spacer using zinc oxide eugenol impression, Group B-Impression made with tray with spacer using zinc oxide eugenol impression material, Group C-Impression made with tray without spacer using light body polyvinyl siloxane impression material, Group D-Impression made with tray with spacer using light body polyvinyl siloxane impression material. During the impression procedure a closed hydraulic system was used to remotely measure the pressures produced in three areas. The pressure produced were calibrated according to the micro strain record. Statistical comparisons of readings were done using t test and ANOVA. The acquired data revealed that ZOE produced an average pressures value of 26.534 and 72.05 microstrain, while light body PVS produced 11.430 and 37.584 microstrain value with and without spacer respectively. Significantly high values were recorded on the vault of the palate when using trays without spacer. The use of light body polyvinyl siloxane and zinc oxide eugenol impression material showed insignificant difference. Within the limitations of this study, tray design has a significantly effected on the pressures produced, while the impression materials does not have any significant difference.
Similar content being viewed by others
References
Masri R, Driscoll CF, Burkhardt J (2002) Pressure generated on a simulated oral analog by impression materials in custom trays of different designs. J Prosthodont 11:155–160
Boucher CO (1951) A critical analysis of mid-century impression techniques for full dentures. J Prosthet Dent 1:472–491
Frank RP (1969) Analysis of pressures produced during maxillary edentulous impression procedures. J Prosthet Dent 22:400–413
Frank RP (1970) Controlling pressures during complete denture impressions. Dent Clin North Am 14:453–470
Komiyama O, Saeki H, Kawara M (2004) Effect of relief space and escape holes on pressure characteristics of maxillary edentulous impressions. J Prosthet Dent 91:570–576
Al-Ahmad A (2006) Pressure generated on a simulated mandibular oral analog by impression materials in custom trays of different design. J Prosthodont 15:95–101
Rihani A (1981) Pressures involved in making upper edentulous impressions. J Prosthet Dent 46:610–614
Howell AH, Manly RS (1948) An electronic strain gauge for measuring oral forces. J Dent Res 27:705–712
Stromberg WR (1955) A method of measuring forces of denture bases against supporting tissues. J Prosthet Dent 5:268–288
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Reddy, S.M., Mohan, C.A., Vijitha, D. et al. Pressure Produced on the Residual Maxillary Alveolar Ridge by Different Impression Materials and Tray Design: An In Vivo Study. J Indian Prosthodont Soc 13, 509–512 (2013). https://doi.org/10.1007/s13191-012-0201-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13191-012-0201-2