The Journal of Contemporary Dental Practice

Register      Login



Volume / Issue

Online First

Related articles

VOLUME 20 , ISSUE 3 ( March, 2019 ) > List of Articles


Effect of Long-term Immersion in Water and Artificial Saliva on the Flexural Strength of Two Heat Cure Denture Base Resins

Aditya S Jagini, Taruna Marri, Dilip Jayyarapu, Rajani Kumari, Vidhyadhar D, Manisha K

Keywords : Compression molding technique, Denture base resin, Flexural strength, Injection molding technique

Citation Information : Jagini AS, Marri T, Jayyarapu D, Kumari R, D V, K M. Effect of Long-term Immersion in Water and Artificial Saliva on the Flexural Strength of Two Heat Cure Denture Base Resins. J Contemp Dent Pract 2019; 20 (3):341-346.

DOI: 10.5005/jp-journals-10024-2520

License: CC BY-NC 4.0

Published Online: 01-05-2019

Copyright Statement:  Copyright © 2019; The Author(s).


Aim: The aim of the present study was to compare and evaluate the flexural strength of heat-polymerized Lucitone 199 and SR Ivocap denture base resin materials which uses polymerization techniques of compression molding and injection molding respectively and effect of artificial saliva and distilled water on long-term. Materials and methods: Ninety specimens each from both the materials measuring 65 × 10 × 3 mm were prepared. After the polymerization, flexural strength was calculated after 24 hours (control group) without immersing in the liquid medium. The test group specimens immersed in saliva and distilled water at 370C was calculated for the flexural strength at 2 weeks, 1 month, 2 months and 4 months. The flexural strength was measured using a universal testing machine. One-way analysis of variance (ANOVA) method was used to analyze the data, pairwise comparisons were done using Bonferroni post hoc test with a probability of less than 0.05 were considered to be statistically significant. Results: The evaluation showed that, despite the duration of immersion and type of acrylic resin, high flexural strength was seen with specimens immersed in saliva than specimens under distilled water. The higher flexural strength was seen in SR Ivocap compared to that of Lucitone 199 with the p value less than 0.05 which showed significant statistically. Conclusion: From the results, we can conclude that the higher flexural strength was shown in specimens of SR Ivocap fabricated through injection molding technique compared to specimens of Lucitone 199 fabricated through compression molding technique after immersion in artificial saliva and distilled water for long term. Clinical significance: The homogeneous copolymer beads, the difference in the water sorption and powder to liquid ratios also affect the mechanical properties of the resins other than the type of resin used in the dentures base.

PDF Share
  1. Diwan R. Materials Prescribed in the Management of Edentulous Patients. In: Zarb G, Bolander CL. Prosthodontic Treatment for Edentulous Patients. ed 12. St. Louis, C.V. Mosby, 2004:190-207.
  2. Vallittu PK, Vojtkova H, Lassila VP. Impact strength of denture polymethyl methacrylate reinforced with continuous glass fibers or metal wire. Acta Odontol Scand 1995;53:392-396.
  3. Arundati R, Patil NP. 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 The Journal of Indian Prosthodontic Society 2006;6(3):133-138.
  4. Salim S, Sadamori S, Hamada T. The dimensional accuracy of rectangular acrylic resin specimens cured by three denture base processing methods. J Prosthet Dent 1992;67:879-881.
  5. Braden M. The absorption of water by acrylic resins and other materials. J Prosthet Dent 1964;2:307-316.
  6. Craig RG. Restorative Dental Materials, Ed 9. St Louis: Mosby,1993:513-514.
  7. IIbay SG, Guvener S, Alkumru HN. Processing denture using microwave technique. J Oral Rehabil 1994;21:103-109.
  8. Arima T, Murata H, Hamada T. The effects of cross-linking agents on the water sorption and solubility characteristics of denture base resin. J Oral Rehabil 1996; 23: 476-480
  9. Lamb DJ, Ellis B, Priestley D. The effects of process variables on levels of monomer in autopolymerizing dental acrylic resin. J Dent 1983;11:80-88.
  10. Archadian N, Kawano F, Ohguri T, et al. Flexural strength of rebased denture polymers. J Oral Rehab 2000;27:690-696.
  11. Takahashi Y, Chai J, Kawaguchi M. Effect of water Sorption on the resistance to plastic deformation of a denture base material relined with four different denture reline materials. Int J Prosthodont 1998;11:49-54.
  12. Finoti LS, Machado AL, Chaves CD, et al. Effect of long-term water immersion on the fracture toughness of denture base and reline resins. Gerodontology 2012;29:e858-e864.
  13. Dootz ER, Koran A, Craig RG. Physical property comparison of 11 soft lining materials as a function of accelerated aging. J Prosthet Dent 1993;69:114-119.
  14. Takahashi Y. Equilibrium strengths of denture polymers subjected to long-term water immersion. Int J Prosthodont 1999;2:348-352.
  15. Dixon DL, Breeding LC, Ekstrand KG. Ekstrand. Linear dimensional variability of three denture base resins after processing and in water storage. J Prosthet Dent 1992; 67:196-200.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.