Effect of Denture Base Reinforcement Using Light Cured E- Glass Fibers on the Level of Salivary Immunoglobulin A

BACKGROUND: A gap still exists between in vitro and clinical studies concerning the biocompatibility of the material in the oral environment and their potential to cause immunological undesirable side effects. The uses of glass fibres to improve the mechanical properties of acrylic resin denture base polymers are well documented in vitro. AIM: The present study aimed to evaluate the effect of denture base reinforcement using light-cured E- glass fibres mesh on the level of salivary immunoglobulin A (S-IgA) in patients wearing complete dentures. MATERIAL AND METHODS: Fourteen completely edentulous patients, in need of complete dentures, participated in the study. The patients were divided into two groups (n = 7) according to the treatment protocol. In the first group, patients received conventional heat-cured acrylic resin dentures. In the second group, the mandibular dentures were reinforced using light cured resin impregnated E glass fibres mesh. In both groups, salivary samples were collected using passive drool technique. The level IgA was assessed by enzyme-linked immunosorbent assay (ELISA) technique at different time intervals. Statistical analysis was carried out using one-way ANOVA followed by Tukey`s post-hoc test and independent t-test. The significant level was set at P ≤ 0.05. RESULTS: Acrylic resin dentures and reinforced ones demonstrated an increase in the mean values of IgA level at the end of the follow-up intervals. And this increase was statistically significant (P ≤ 0.05). Although, the reinforced dentures revealed higher mean values, there was no statistically significant difference between the two groups (P > 0.05) CONCLUSIONS: Within the limitations of the present study, the following could be concluded: (1) the insertion of complete dentures induced changes in the level of IgA; and (2) denture base reinforcement using light cured resin impregnated E-glass fibres mesh had a similar effect to that of heat cured acrylic resin on the level of IgA

Masticatory performance and patient satisfaction of metal-reinforced and CAD/CAM-fabricated acrylic resin mandibular complete dentures

Background/aim The masticatory problem of removable complete dentures had been introduced by many researchers to be assisted by many recent technologies. Solving such issues advances self-patient satisfaction, confidence, and motivation. This study aimed to evaluate masticatory performance and patient satisfaction of metal-reinforced and CAD/CAM-fabricated acrylic resin mandibular complete dentures. Patients and methods Sixteen completely edentulous patients were divided randomly following a 1 : 1 allocation ratio into two groups; group I received maxillary and mandibular complete dentures constructed from acrylic resin reinforced with chrome cobalt framework and group II received maxillary and mandibular rapid prototype complete dentures (3D-printed) using the CAD/CAM technique. At baseline, 2, and 4 weeks, masticatory performance using the masticatory efficiency index and patient satisfaction using Borerrigter’s method of assessing patient satisfaction were evaluated at each interval for further statistical analysis using one-way analysis of variance test followed by Tukey’s post-hoc test for multiple comparisons and Pearson’s correlation coefficient between different variables. Results Regarding masticatory performance for each group, one-way analysis of variance revealed a significant difference between different intervals as a P value less than 0.05 with higher masticatory values for group II, while for patient satisfaction, it showed an insignificant difference for all satisfaction domains as a P value more than 0.05. The correlation between masticatory performance and overall patient satisfaction was calculated using Pearson’s correlation coefficient and revealed a moderate to strong, positive, significant correlation in both groups. Conclusion The masticatory performance and patient satisfaction of mandibular complete dentures constructed by the 3D-printed CAD/CAM method were higher than acrylic resin denture bases reinforced with chrome cobalt framework, denoting that the 3D-printed CAD/CAM method can be the primary clinical treatment option for completely edentulous patients despite its overall level of satisfaction, which requires additional follow-up investigations to pronounce the positive effect of CAD/CAM dentures