In addition to Si2O3, boron trioxide also can improve the hydrolytic stability of glass fiber surface so that less water is absorbed and indirectly reduces the water absorption by the heat-polymerized acrylic resin denture base results in the improvement of impact and
transverse strength. [7,12]
Auto-polymerizing resin repairs provide a rapid and economic convenience to patients.6 Unfortunately, the repaired units may lose some of their original
transverse strength.
In the rear wall crossmember, the fibers are aligned in one direction for maximum
transverse strength, with up to 14 layers that form a 5-mm (0.2-inch) thick sheet.
Fractures may occur during use because of unsatisfactory
transverse strength, impact strength, and flexural resistance.
The
transverse strength of fiber reinforced PMMA composite didn't show a significant increase which is due to fiber pull out, can be minimized with proper wetting agents.
Unfortunately, glaze removal by a diamond bur or green stone may damage porcelain by scoring the surface and an additional disadvantage of glaze removal is a reduction of 50 per cent in
transverse strength (Phillips, 1991).
The
transverse strength is governed by many factors which include the properties of the fibre and matrix, the interface bond strength, the presence and distribution of voids, and the internal stress and strain distribution.
Additionally, the North American sand mixes were tested for
transverse strength because of the prevalence of transverse rather than tensile testing in some regions.
Knitted reinforcements offer significant handling and performance advantages over woven fabrics or CSM, and are available in different orientations to provide optimum strength in the structure, for example triaxial (0/+/-45[degrees]) is ideal for applications that require a combination of high longitudinal and shear strength and stiffness> and some
transverse strength.