An in-vitro study was undertaken to evaluate the effect of Panavia-21 and ProBOND In retention and microleakage of amalgam restorations. 40 freshly extracted molar teeth were subjected for retention test while another 40 teeth were selected to evaluate microleakage. They were divided into 4 groups of 10 each. After laboratory procedures, the samples submitted for retention test were examined under SEM. Results were statistically analysed. To assess microleakage the samples were submitted to thermocycling, later the teeth were immersed in 5% methylene blue dye and the extent of dye penetration was evaluated by Stereomicroscope. The Statistical analysis of the results of retention test showed that Group IV required highest force to dislodge amalgam restorations when compared to other 3 groups. Whereas the statistical analysis of the results of the microleakage showed that Group IV exhibited less microleakage when compared to other groups. The study concludes that “ Bonded Amalgam Restorations� are promising for use in restoring posterior teeth with extensive caries.

30 maxillary/mandibular anterior teeth with apical periodontitis were selected. The age factor varied between 15-40 years. Cases were divided into three groups on the basis of the combination of symptoms. Access openings were prepared and sterile paper points were inserted into the canals for one minute and then were immediately inoculated in thioglycollate broth which were later incubated aerobically as well as anaerobically . Each culture plate were examined and different aerobic and anaerobic bacteria were isolated and identified. The number of anaerobes was greater than aerobes in infected root canals. Peptostreptococcus, Peptococcus, Eubacterium , Porphyromonas and Bacteroides were commonly isolated in cases having pain on percussion. Porphyromonas and Bacteriodes were significantly related to odour in infected root canal. Peptostreptococcus, peptococcus, and Porphyromonas gingivalis were found to be significantly related to subacute clinical symptoms.

Both Dyract and Fuji II LC were placed in class V non-carious abrasion erosion lesions and clinically evaluated for 6 months. Criteria taken for clinical evaluation were retention, marginal integrity, appearance and gingival condition of the restored tooth. After 6 months, it was seen that all retained restorations placed with Dyract and Fuji II LC were clinically acceptable, with greater esthetics with Dyract.