Effect of Thermocycling, Teeth, and Polymerization Methods on Bond Strength Teeth-Denture Base

Abstract

Objective To evaluate the shear bond strength between different artificial teeth and denture base polymerized by two polymerization methods submitted to thermocycling. Materials and Methods Two acrylic resins were selected according to the polymerization method (water-bath and microwave), and four different artificial teeth (Biotone, Dentsply; Trilux, Vipi Dent; Premium 8, Heraeus Kulzer; Soluut PX, Yamahachi) were also tested. The polymerization of the acrylic resin was performed by using conventional cycle (8 h at 74°C) in water-bath and using two cycles (20 min at 270 W + 5 min at 360 W) by the microwave method. The shear bond strength was evaluated after 24 h of water storage at 37°C (immediately) and after the thermocycling test (5,000 cycles, 5–55°C). The shear bond strength (n=10) was performed using a universal testing machine (Instron 4411) at a crosshead speed of 1.0 mm/min. Modes of failures were classified as cohesive and adhesive. The data (MPa) were statistically analyzed by three-way ANOVA, and the mean values were compared by the Tukey test (α = 0.05). Results In general, the polymerization by microwave showed the highest shear bond strength values, and Trilux artificial teeth had the lowest bond strength values (p < 0.05). Thermocycling did not affect the shear bond strength (p < 0.05). There was a predominance of cohesive failures for all groups. Conclusions The chemical composition of the artificial teeth affects the bond strength, and the microwave method is preferable to perform the acrylic resin polymerization.

Effect of surface treatments on the bond repair strength of resin composite to different artificial teeth

“…The combination of a rougher surface/sandblasted surface and bond agent application significantly improved the shear bond strength between the repair and the tooth in composite resin. Nevertheless, this protocol showed similar result to only applying bond agent for acrylic resin teeth [7,19].…”

“…Furthermore, there is a chemical interaction between the resin base and artificial teeth [3]. Regarding disadvantages, acrylic resin artificial teeth exhibit often-occlusal wear, which leads to decreased masticatory efficiency and loss of vertical dimension [5].They also present clinical problems, as they suffer remolding of worn occlusal surfaces in denture teeth [5,6], and fractures or debonding from the prosthesis base [7].…”

“…The success of these procedures mainly depends on the composite resin adhesion to the artificial teeth [7]. Various methods have been reported to improve the reactivity of highly converted composites; these methods include acid etching [9], air abrasion [10] and the use of adhesives [11].…”

The Effect of Biodentine Maturation Time on Resin Bond Strength When Aged in Artificial Saliva

“…It is worth mentioning that the present study showed higher bond strength values after the storage in artificial saliva. However, also the thermal cycles in the oral cavity could have an effect on adhesion values [ 48 ]. Therefore, further studies are needed in order to test this variable.…”

Comparison of shear bond strengths of different types of denture teeth to different denture base resins

“…7 Findings related to the bond strength between denture base materials and artificial teeth vary. [8][9][10][11][12][13][14][15][16] As some studies have already reported, different types of prefabricated teeth also showed differences in the shear bond strength. 4,17 Advancements in technology have ensured digital methods for denture base fabrication (computer-aided design/ computer-aided manufacturing [CAD/CAM]), including subtractive (milling) and additive technologies (three-dimensional [3D] printing).…”