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An investigation into the transverse and impact strength of a new indigenous high - impact denture base resin, DPI- TUFF and its comparison with two most commonly used two denture base resins. INTRODUCTION: The heat cure denture base resins are extensively used for their excellent properties such as ease of handling, durability and esthetics etc. However, their strength properties are field for ongoing research, leading to various modifications of the resins to improve its strength, which include the high - impact resins. AIMS AND OBJECTIVES: A study was carried out to evaluate and compare the transverse and impact strength of a new high - impact denture base resin and it was compared with two most commonly available resins in the market. The materials used were DPI-TUFF, Lucitone 199 and DPI heat cure denture base resins. MATERIALS AND METHODS: A total of 120 resin samples were prepared (60 samples for transverse strength and 60 samples for impact strength) from three different materials. The samples were prepared using the short and long curing cycle and tested under dry conditions and after immersion in water for a week. RESULTS AND DISCUSSION: The obtained values for transverse and impact strength were subjected to statistical analysis. A student's T-test was performed to determine the difference between the materials selected. CONCLUSION: The DPI-TUFF high impact denture base resin appears to be comparatively superior to the other two resins, with mean transverse strength of 115.0 MPa and impact strength of 18.95 kJ/m2. The dry strength of the samples of the materials tested show that it is greater than after immersion of the samples in water at 37oC for a week. The long curing cycle shows considerably higher values of transverse and impact strength as compared to short curing cycle.

the journal of indian prosthodontic society

An investigation into the transverse and impact strength of a new indigenous high-impact denture base resin, DPI- tuff and its comparison with most commonly used two denture base resins