الفهرس 
List of ContentsOnly 14 pages are availabe for public view
 |  | from | 102 |  |  |
| | | from | 102 | | |
Abstract
Objectives : To evaluate cuspal deflection and micromorphology of mesio- occluso-distal (MOD) cavities restored with short fibre-reinforced composite restoration. Materials and methods: Two different commercially available composite resin restorations, (i) short fibre-reinforced composite restorations(ever X Posterior GC, Tokyo Japan) and (ii) conventional micro hybrid composite restorations (G-aenial universal composite GC, Tokyo Japan ) and a universal adhesive (G-Premio BOND GC, Tokyo Japan), were used in the current study. A total of 40 sound maxillary human premolar teeth were selected, for cuspal deflection test and representative selected samples for micro morphological analysis test and received standardized MOD cavity preparations suitable for each test. For the cuspal deflection test a total number of forty Teeth (n=40) were divided into four equal groups (n=10); group A : conventional microhybrid composite (conv.), group B : short fibre-reinforced composite (SFRCs), group C: short fibre-reinforced composite covered with conventional microhybrid composite (SFRCs+Conv.), group D: short fibre-reinforced composite ”cut off” then covered with conventional microhybrid composite. Measuroscope was used to evaluate the cuspal deflection. For the micromorphology of restorations/tooth interface examination all previous groups were represented by selected specimen under scanning electron microscope. For cuspal deflection test, the collected data from each test were tabulated, coded, then statistically analyzed using IBM-SPSS software (version 26.0, IBM, NY, USA). One-way ANOVA followed by post-hoc Tukey test were used for multiple comparisons. The level of significance was set at P < 0.05. For the micromorphology of restorations/tooth interface a descriptive analysis of photomicrograph was made for all representative specimens. Results : For cuspal deflection test, the results of the current study showed that Both group A (conv.) and group C (SFRCs+Conv.) showed high level of significance among the means of cuspal deflection values ,than group B( SFRCS) and group D (Cut off) (p > 0.05). There were no significant difference in cuspal deflection between group A (conv.) and group c (SFRCs+Conv.) (p < 0.05). There were no significant difference in cuspal deflection between groups, B( SFRCS) and grpup D (Cut off) (p < 0.05).