Comparative evaluation on stress distribution pattern of conventional and liquid-supported dentures: An in-vitro study
Objective: To compare the stress exerted by liquid supported denture and conventional denture on a simulated model.
Methodology: A completely edentulous maxillary cast was made in self-cure acrylic resin and five strain gauges (250Ω, 2.01 G F) were attached to its surface. Soft tissue component of light body silicone was incorporated on the acrylic model. The model made was duplicated and two casts were obtained. On one a conventional denture and on the other a liquid supported denture was fabricated. The dentures were placed on the model and were subjected to compressive loading and the strain was measured.
Results: The anterior strain gauges recorded a mean of 70 and 72 microstrains for the conventional denture and 52.66 and 50.33 microstrains for the liquid supported denture. The posterior strain gauges recorded a mean of 182.66 and 175.66 microstrains for the conventional denture and 141.66 and 142 microstrains for the liquid supported denture. The mid palatal strain gauge recorded a mean of 199.33μ strains for the conventional denture and 111μ strains for the liquid supported denture.
Conclusion: A liquid supported denture does distribute occlusal stress better than a conventional denture.