The invention of Poly methyl methacrylate lead to new evolution in dental prosthesis science and is an ideal material

to produce acrylic denture base resins but unfortunately, fracture is a common problem, so for reinforcement we have

to consider some methods for improving them in special conditions. In this study 30 heat cure acrylic (Meliodent) in

dimentions (70mm 15mm 3mm) were used. In  rst group heat cure acrylic without any reinforcement, Second

group heat cure acrylic was reinforced with 1mm sand blast metal wire and third group, samples were reinforced

with 1mm sandblast metal wire that impregnated with 4meta bonding agent. All of the samples tested with universal

testing machine by 5 mm speed/min, then the result analyzed by ANOVA and TUKEY HSD. The transverse strength of

 rst group was 87.47 N/mm2. Also, transverse strength in the second and third groups was 98.42 N/mm2 and 111.43

PMMA is routinely produced by suspension or emulsion

polymerization. PMMA is formed by addition polymeri-

zation of multiple methyl methacrylate monomers in the

presence of an initiator, typically benzyl peroxide (Alla

et al. 2011). The PMMA is usually used for the construc-

tion of removable partial or complete dentures (Raj and

D’Souza 2011). In heat-cured materials, the polymeriza-

tion process is initiated by the release of free radicals

from benzyl peroxide on supply of heat energy (Ginju-

palli et al. 2012). These free radicals react with the mon-

mechanical strength tests, is especially useful in com-

paring denture base materials in which a stress of this

applied to the denture during mastication. The trans-

verse or  exural strength is a combination of compres-

sive strength, tensile, and shear strength, all of which

directly re ect the stiffness and resistance of a material

to fracture (Ersu et al. 2009). The transverse strength

of acrylic resins depends on numerous factors including

polymer molecular weight and bead size, residual mono-

mer level, plasticizer composition, cross–linking agent,

ferent experimental conditions (Tugut et al. 2012).

adequate mechanical properties, suf cient aesthetics,

hygiene, easy handling of resins and minimal release of

residual compounds such as residual monomer (Raj and

D’Souza, 2011). To solve this perplexing problem, it is

reported to altering the PMMA surface before applying a

resilient material (Tugut et al. 2012). In this regard, sand

blasting procedure has been introduced which involves

spraying a stream of aluminum oxide particles against

sion; altering composition either chemically (using

high impact polymer) and making physical alterations

(incorporate materials such as  bers, metal into PMMA)

(Gharechahi et al. 2014; Nejatian et al. 2015).

Because of the risk of fracture should a patient drop

their denture, high impact strength is a desirable prop-

erty. Given the function of a denture base in a removable

prosthesis, high  exural strength,  exural modulus, and

forced with 1mm sandblast metal wire that impregnated

with 4meta bonding agent (U Bar).

In this study 30 heat cure acrylic (Meliodent, HERAEUS

KULZER, Germany) in dimension s (70mm  15mm 

3mm) were used. In  rst group heat cure acrylic samples

without any reinforcement, second group samples were

reinforced with 1mm sand blast metal wire and third

group, heat cure acrylic was reinforced with 1mm sand-

To insert wire into the acrylic, after press and remove

the generator and remove the paper, a groove 2×70 mm

was done on the generator and the sand blast metal wire

 lled using heat cure acrylic. In the third group sand

blast metal wire was coated with 4meta bonding agent

(UBar) to improve the connectivity of the metal wire and

acrylic resin. Then the transverse strength of all samples

was tested with universal testing machine ( Instron, Sha-

kopee, 79USA) by speed of 5 mm/min using (N/mm

27.39% improve the transverse strength.