New Era in Denture Base Resins: A Review

Abstract

In past, the materials used for denture bases were vulcanite, celluloid & phenol formaldehyde. Acrylic resins were introduced to dentistry in 1930's. There are certain limitations of acrylics like residual monomer allergy, poor mechanical strength, low fatigue strength, brittle on impact, poor conductors of heat, low hardness, high coefficient of thermal expansion, thermal shrinkage, poor color stability of self-cured resins, porosity, crazing, warpage, poor adhesion to metal and porcelain and requirement of mechanical retention. But still they are the most widely used denture base materials till date. But recently there has been much advancement in the field of denture base resins to overcome their drawbacks and to obtain an ideal denture base material. This article reviews the various advancements in the field of denture base resins.

Prosthodontic Applications of Polymethyl Methacrylate (PMMA): An Update

“…Similarly, the presence of residual monomers always remains an issue affecting the properties and biocompatibility [ 58 , 115 , 230 ]. Other properties of PMMA that require improvement include its poor fatigue strength, low impact strength, weak bonding strength, low thermal conductivity, susceptibility to crazing, high thermal expansion coefficient, poor color stability, susceptibility to warpage, and porosity [ 231 ]. Each drawback has its own consequences, such as the poor flexural and impact strength resulting in fatigue failure or accidental fracture of dentures [ 140 , 165 , 178 ].…”

<p>Kekuatan ikat geser gigi artifisial akrilik dan porselen pada tiga macam basis gigi tiruan nilon termoplastik</p><p>The shear bond strength of acrylic and porcelain teeth in three types of thermoplastic nylon denture bases</p>

“…Bahan ini dapat menjadi alternatif pembuatan gigi tiruan karena mempunyai estetika dan fleksibilitas lebih baik daripada resin akrilik. 3,[5][6][7] Nilon termoplastik dapat digunakan sebagai bahan pembuatan gigi tiruan sebagian lepasan karena klamernya merupakan perluasan dari basis gigi tiruan. Resin poliamida (nilon termoplastik) ini memiliki kelebihan dalam hal estetika, fleksibilitas dan biokompatibel terhadap jaringan dan tidak toksik bagi penderita yang alergi logam dan monomer resin.…”

“…10 Nilon termoplastik juga memiliki kekurangan dibandingkan dengan resin akrilik, antara lain memerlukan peralatan yang lebih rumit dalam pemrosesan, sulit diperbaiki dan tidak memiliki ikatan kimia dengan gigi artifisial resin akrilik, sehingga gigi artifisial mudah terlepas dari basis gigi tiruan nilon termoplastik. 5,6,[11][12][13][14] Ikatan yang cukup antara gigi artifisial akrilik dengan bahan basis gigi tiruan diperlukan karena meningkatkan kekuatan dan daya tahan gigi tiruan karena gigi artifisial menjadi bagian penting dari gigi tiruan. 7 Kegagalan ikatan antara gigi artifisial dan basis gigi tiruan akrilik telah terbukti menjadi masalah dalam gigi tiruan yang dibuat oleh National Health Services of Britain and Northern Ireland.…”

Physical properties of heat cure denture base resin after incorporation of methacrylic acid

“…Although dentistry has developed new materials and techniques used in rehabilitation of edentulous patients, polymethyl methacrylate (PMMA) resins have dominated the denture base market for over 80 years. [ 1 ] However, PMMA resins have certain disadvantages, such as porosity, water sorption, and solubility. Another important limitation is the deposition and formation of biofilm on the surface of PMMA resins[ 2 ] which acts as a reservoir of microorganisms and contributes to oral diseases and tissue damage.…”