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LETTER TO THE EDITOR
Year : 2013  |  Volume : 4  |  Issue : 3  |  Page : 106

Tooth-denture base bond strength; much promise, some progress, and more work needed


Department of Prosthodontics, Shree Bankey Bihari Dental College and Research Centre, Masuri, Ghaziabad, Uttar Pradesh, India

Date of Web Publication8-Aug-2013

Correspondence Address:
Prince Kumar
Department of Prosthodontics, Shree Bankey Bihari Dental College and Research Centre, Masuri, Ghaziabad, Uttar Pradesh
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2155-8213.116343

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How to cite this article:
Sethi K, Sahoo S, Kumar P, Bansal A. Tooth-denture base bond strength; much promise, some progress, and more work needed. Dent Hypotheses 2013;4:106

How to cite this URL:
Sethi K, Sahoo S, Kumar P, Bansal A. Tooth-denture base bond strength; much promise, some progress, and more work needed. Dent Hypotheses [serial online] 2013 [cited 2019 Jun 20];4:106. Available from: http://www.dentalhypotheses.com/text.asp?2013/4/3/106/116343

Sir,

Natural teeth loss is a matter of great concern to majority of people and its replacement by artificial substitutes, such as dentures, is vital for the continuance of an individual's overall health. Complete denture Prosthodontics is challenging because rehabilitation of edentulous patients with the complete dentures has to be carried out by considering the various biological and mechanical factors to restore the functions and health of the stomatognathic system. For long-term use of prostheses, a key consideration is the adequate mechanical properties of artificial tooth materials. Moreover, any damage to the prosthesis results in immense psychological stress to the patient. Inspite of the meticulous care taken during fabrication, the prosthesis has limitations, which depends on the materials and the techniques used. [1]

To improve these mechanical properties, filler particles such as copper, silver, stannous oxide and aluminum oxide have been added to the acrylicresin which in turn resulted in modest improvement in the mechanical properties of acrylicresin. [2] Mica has many advantages over other reinforcement fillers such as low-cost and easy availability. It also has the ability to be ground to very fine size with a high aspect ratio. Addition of mica in acrylic does not interfere in achieving mold details or any other process. [3] Literature evidenced only few studies where in mica has been added to denture base resin and evaluated for any possible change in its mechanical properties. The debonding of acrylic teeth from the denture base also remains a common clinical occurrence in Prosthodontic practice. Chemical bonding between the teeth and the denture base acrylic occurs through the absorption of monomer by the surface layers of the teeth during processing. Mutual solubility or compatibility of two polymersis essential for the establishment of the interwoven polymer and thus, for the strength of the bond.

Addition of silanated mica may result in interference in the tooth-denture base interface and this may proved etrimental to the ability of heat cure acrylic to bond chemically with the acrylic teeth leading to possible adhesive failures. Furthermore, addition of silanated mica to heat cure denture base resin seems to significantly increase its flexural strength without a decrease in the tooth-denture base bond strength. This letter is an endeavor to catch the attention of researchers to this routinely ignored aspect of removable Prosthodontics and authors look forward for some new-fangled studies using the newer materials to authenticate and establish certain concrete guidelines in this perspective.

 
  References Top

1.Darbar UR, Huggett R, Harrison A. Denture fracture - A survey. Br Dent J 1994;176:342-5.  Back to cited text no. 1
[PUBMED]    
2.Marei MK, El-Sabrooty A, Ahmed Y, Ragab AY, El-Osairy MA. A study of some physical and mechanical properties of metal-filled acrylicresin. Saudi Dent J 1994;6:69-77.  Back to cited text no. 2
    
3.Unalan F, Dikbas I. Effects of mica and glass on surface hardness of acrylic tooth material. Dent Mater J 2007;26:545-8.  Back to cited text no. 3
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