Reinforcing effect of glass fiber-reinforced composite reinforcement on flexural strength at proportional limit of a repaired denture base resin

Figures & data

Figure 1. Scanning electron micrograph (500×) of cross section of polymerized FRC reinforcement.

Figure 2. Schematic of specimens. (A) intact specimen, (B) repaired specimen without reinforcement, (C) repaired specimen reinforced with metal wire reinforcement, (D) repaired specimen reinforced with FRC reinforcement.

Table 1. Mean and standard deviation (SD) of the flexural properties of the repaired denture base resin (N = 10).

Condition of denture base resin	Reinforcement	Ultimate flexural strength (MPa)	Flexural strength at the proportional limit (MPa)	Elastic modulus (GPa)
Intact	None	82.2 (12.3)	47.5 (1.6)^a	2.9 (0.3)^a,b
Repaired	None	32.9 (6.7)	27.5 (5.7)	2.6 (0.2)^b
Repaired	Metal	62.7 (12.3)^a	40.5 (6.7)^a	3.8 (0.4)
Repaired	FRC	51.7 (17.1)^a	46.6 (17.0)^a	3.2 (0.3)^a

^a or ^b denotes no significant differences (p > 0.05).

Table 2. The joint efficiency (times) of the repaired denture base resin on the intact denture base resin using the flexural strength at the proportional limit.

Condition of denture base resin	Reinforcement	Joint efficiency (times)
Intact	None	1
Repaired	None	0.58
Repaired	Metal	0.85
Repaired	FRC	0.98