The four liners can be used without interfering with the higher efficacy of SFRC, compared to conventional composite resins, to improve the fracture strength of premolar MOD cavities.

Aim. This study aimed to compare the antimicrobial efficacy of calcium hydroxide (CH) and triple antibiotic paste (TAP) against E. faecalis bacteria in infected primary molars. Methods and Materials. Thirty-nine 4–6-year-old children with an infected primary molar were randomly divided into three equal groups (n = 13) to receive either CH or TAP and an untreated control group. Following access cavity preparation, the first microbiological samples (S1) were collected by using absorbent paper points. The canals were prepared and rinsed. Then, CH or TAP was applied in the root canals. Seven days later, the second microbiological samples (S2) were collected. DNA extraction was performed to count E. faecalis bacteria by using real-time PCR for S1 and S2 samples. Data were analyzed through one-way ANOVA and Tukey’s test (α = 0.05). Results. E. faecalis bacteria counts decreased significantly in CH and TAP groups compared with the control group ( P ≤ 0.001 ). However, no statistically significant difference existed between these two groups ( P = 0.698 ). Conclusion. Both TAP and CH have significant antimicrobial effects as intracanal medicament between the treatment sessions in infected primary teeth.

Aim: Biodentine is a biocompatible, bioactive material with dentin regeneration potential that is known as the future material of choice in primary tooth pulp therapy. Biodentine (BD) is also designed as a dentine substitute in direct posterior restorations. So, the aim of this study is to evaluate the fracture resistance of BD pulpotomized primary molars, restored with different restorative techniques. Materials and methods: A total of 36 extracted primary second molar teeth were selected. Standardized class I access cavity preparation was done and then the teeth were randomly divided into three experimental groups of 12 in each. Group I (n = 12): BD and glass ionomer as liners with composite resin as restoration, group II (n = 12): BD as both liner and restoration; and group III (n = 12): BD and glass ionomer as liners with amalgam as restoration. After water storage and thermocycling, static fracture resistance was tested. Data (in Newtons) were analyzed using one-way ANOVA (α = 0.05). Results: Statistically significant difference was observed among groups of the study (p value = 0.000). Composite group showed the maximum fracture resistance and amalgam group exhibited the least (2371.67 N vs 1912.17 N). Application of composite and BD respectively led to higher numbers of restorable fractures (75%). Conclusion:In pulpotomized primary molars using biodentine, composite restoration shows the best fracture resistance followed by BD and amalgam restorations. Clinical significance: In order to improve the outcome of endodontic treatment in primary molars, biodentine can be used successfully as both pulpotomy and restorative material to achieve less time-consuming treatment in children.