Effect of Different Denture Base Material on Electromyographic Activity in Maxillary Single Denture Wearers

Document Type : Original Article

Authors

1 Demonstrator of Removable Prosthodontics, Faculty of Dental Medicine for Girls, Al-Azhar University

2 Assist. Professor of Removable Prosthodontics, Faculty of Dental Medicine for Girls, Al-Azhar University

3 Lecturer of Removable Prosthodontics, Faculty of Dental Medicine for Girls ,Al-Azhar University

Abstract

Aim of study: was to evaluate and compare the effect of three different denture base material (heat cured acrylic resin, cast metal base and thermoplastic resin) on electromyographic activity of masseter and temporalis muscles in maxillary single denture wearers. Material and methods: Ten completely maxillary edentulous patients were selected with ages ranged from 55-60 years. All patients had received heat cured acrylic resin single maxillary complete denture (Group І) then replacing the denture base through rebasing procedures by cobalt chromium (Co-Cr) (Group ІІ) then thermoplastic resin material (Group ІІІ). All patients were instructed to use their resin dentures for equal periods of three months when EMG records of muscles of mastication (masseter and temporalis) were obtained at insertion then patient recalled after one month and at the end of three months , period of two week interval was left between each group as a washing period. Results: The results of this study showed that there were a significant differences between them, as the thermoplastic resin (group ІІІ) was the best followed by cobalt chromium denture (group ІІ) then heat cured acrylic resin denture base (group І) .Conclusion: EMG activity affected by maxillary denture base material as the lesser effort of masticatory muscles was done by using thermoplastic resin denture base rather than Co-Cr or acrylic resin denture base.

Keywords

Main Subjects


Dhiman RK, Chowdhury SK R. Midline Fracture In Single Complete Acrylic Vs Flexible Dentures. MJAFI . 2009;65:141 -5.
2.
Andrei O, Radu I . Diagnosing and treating the functional problems of the patient with upper single denture - case report. Therapeutics, Pharmacology And Clinical Toxicology. 2010;16145 -61.
3.
Schmizu H, Tsue F , Obukuro M , Kido H, Takahashi Y, Ohmuro H. Fracture strength of metal base complete maxillary dentures with newly designed metal framework .Int Chin J Dent.2005;5: 35-8.
4.
Kohli S, Bhatia S. Polyamides in dentistry. Int J Sci Study 2013;1:20-5.
5.
Ucar Y, Akova T, Aysan I. Mechanical properties of polyamide versus different PMMA denture base materials. J Prosthodont 2012;21:173-6.
6.
Lima LM, Cunha DA, Moraes KJR, Silva HJ, Pernambuco LA, Nascimento GK, et al. Surface electromyography of the masseter muscle during chewing: A systematic review. Rev. CEFAC. 2012, 4:725-31.
7.
Garrett FA, Angelone L , Allen WL. The effect of bite opening, bite pressure and malocclusion one the electrical response of the masseter muscles. J Amer Dent. 2009,50:435-44.
8.
Ono T , Kita S , Nokubi T. The role of occlusion in preservation and prevention in complete denture prosthodontics. J Prosthet Dent. 2010, 25:121-38.
9.
Mohammed M D, Shaimaa M F, Fahad A H, Ritva N, Aune R. PMMA denture base material enhancement: a review of fiber, filler, and nanofiller addition . Int J Nanomedicine. 2017,12: 3801.
10.
Carr A B, Mc Givney G P, Brown D T. Major connector in McCraken’s removable partial prosthodontics. 11 th ed St Louis: Mosby, 2008. CompenContinEduc Dent. 2006; 27:186-93.
11.
Ahmed E A , Ahmed I E , Ela A A, Fahmy A, Nassani M Z. Do flexible acrylic resin lingual flanges improve retention of mandibular complete denture. J Int Soc Prev Community Dent. 2015, 5365-71.
12.
Heartwell CM, Rahn AO. Syllabus of complete dentures. 5th ed Philadelphia. Lea&Febiger. 2010,12-5.
13.
Atashrazm P, Ansari LH , Khorsand M. An evaluation of occlusal contacts of remounted complete denture before final occlusal adjustment. J Shiraz Univ Dent. 2009, 9:1-4.
14.
George A Z, Charles L B, Steven E E, Aaron H F, Rhonda F J, Regina M S. Prosthodontic Treatment for Edentulous Patients: Complete Dentures and Implant-Supported Prostheses.13 th ed .C.V. Mosby Co St. Louis, Missouri. 2012,464.
15.
Kamel A A. Effect of using a duplicate and a new denture on the electromyographic activity of masticatory muscles. M.DS. Thesis Cairo Univ.2007.
16.
Van Kampen FM, Van der Bilt A, Cune MS, Founntijn-Tekamp FA, Bosman F. Masticatory function with implant-supported over-denture. J Dent Res. 2012,83:708-11.
17.
Nora A Y. Effect of different denture base materials on the masticatory muscles activity in case of maxillary single dentures wearers. M. DS. Thesis Cairo Univ. 2016.
18.
Eman M A and Mohammad Z N. The effect of flexible acrylic resin on masticatory muscle activity in implant-supported mandibular overdentures: a controlled clinical trial. J Electron Physician.2016, 8: 1752-8.
19.
Pires-de-Souza FC, Panzeri MA, Vieira R, Garcia R , Consani S. Impact and fracture resistance of an experimental acrylic polymer with elastomer in different proportions. J Mater Res. 2009, 12:415-8.
20.
Keenan PL , Radford DR, Clark RK . Dimensional change in complete dentures fabricated by injection molding and microwave processing. J Prosthet Dent. 2003, 89:37- 44