Abstract

Introduction: All-on-4^® concept has seen much success mainly due to its immediate loading quality. A temporary fixed hybrid usually made of all acrylic resin is given for 6 months which is later replaced by a definitive prosthesis. This temporary prosthesis is supported by only four implants and strength of the complete unit depends on the strength of denture base which plays a major role in final outcome. This study is designed to evaluate different commercially available all acrylic resin denture materials with better flexural strength, impact strength and water sorption properties.

Materials and method: Investigation of the impact strength, flexural strength and water sorption of three denture base materials, namely, Trevalon HI, Brecrystal and Ivocap plus. A total of 90 samples were prepared from these materials. Universal testing machine and Izod impact tester was used for flexural strength and impact strength and for evaluating water sorption, the specimens were stored in a desiccator at 37ºC for 23 hours and the samples are weighed using a balance.

Results: Brecrystal showed slightly higher flexural and impact strength mean values than Ivocap plus, but there was no significant difference statistically. Trevalon HI showed the least mean flexural, impact strength values than the other two materials. Brecrystal showed the least water sorption mean values comparatively. Trevalon HI showed the highest mean water sorption values followed by Ivocap plus and Brecrystal.

Conclusion: Each denture base material varied in different properties. Brecrystal showed slightly higher flexural and impact strength and Trevalon HI showed the highest mean water sorption values.

Clinical Significance: Since the final outcome of implant prosthesis in All-on-4^® technique is partly depended on temporary fixed hybrid prosthesis, the material used for its fabrication should be chosen wisely considering various properties as these are of utmost importance in predicting their clinical performance up on immediate loading.

Keywords: Acrylic Resin; All-on-4®; Denture Fracture; Immediate Loading; Temporary Fixed Hybrid

References

1. Kumar L. “Biomechanics and clinical implications of complete edentulous state”. Journal of Clinical Gerontology 5 (2014): 101-104.
2. Shadid R and Sadaqa N. “A comparison between screw-and cement-retained implant prostheses. A literature review”. The Journal of Oral Implantology 38 (2012): 298-307.
3. Taruna M., et al. “Prosthodontic perspective to all-on-4® concept for dental implants”. Journal of Clinical and Diagnostic Research 8 (2014): 16-19.
4. Anusavice KJ., et al. “Phillips' science of dental materials. 11^th edition”. Elsevier Health Sciences (2012).
5. Powers JM., et al. “Craig's restorative dental materials/edited by Ronald L”. Sakaguchi, John M. Powers. Philadelphia, PA: Elsevier/Mosby (2012).
6. Rahal JS., et al. “Influence of chemical and mechanical polishing on water sorption and solubility of denture base acrylic resins”. Brazilian Dental Journal 15 (2004): 225-230.
7. Skinner EW. “Acrylic denture base materials: Their physical properties and manipulation”. Journal of Prosthetic Dentistry 1 (1950): 161-167.
8. Shepard Wl and Colonel L. “Denture bases processed from a fluid resin”. Journal of Prosthetic Dentistry 19 (1968): 561-572.
9. Tuna SH., et al. “The evaluation of water sorption/solubility on various acrylic resins”. European Dental Journal 2 (2008): 191-197.
10. Uzun G and Hersek N. “Comparison of the fracture resistance of six denture base acrylic resins”. Journal of Biomaterials Applications 17 (2002): 19-29.
11. Faot F., et al. “Impact and flexural strength and fracture morphology of acrylic resins with impact modifiers”. Open Dental Journal 3 (2009): 137-43.
12. Smith DC. “Recent developments and prospects in dental polymers”. Journal of Prosthetic Dentistry 12 (1962): 1066-1078.
13. Neihart TR and Flinton RJ. “Measuring fracture toughness of high impact poly (methyl methacrylate) with the short rod method”. Journal of Prosthetic Dentistry 60 (1988): 249-253.
14. Lassila LVJ and Vallitu PK. “Denture base polymer Alldent Sinomer: mechanical properties, Water sorption and release of residual compounds”. Journal of Oral Rehabilitation 28 (2001): 607-613.

Citation

Citation: N Chandra Sekhar., et al. “Properties Affecting the Fracture Resistance of All Acrylic Resin in All-on-4® Technique - An In Vitro Study". Acta Scientific Dental Sciences 4.8 (2020): 93-103.

Copyright

Copyright: © 2020 N Chandra Sekhar., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.