Introduction. This paper describes a case of bone augmentation with combination of Platelet-Rich Fibrin (PRF) and β-TCP for treatment of chronic periapical cyst. The case was followed for 12 months. Methods. Patient presented with chronic periapical lesion in maxillary anterior teeth with history of trauma 8 years back. Radiographically, a periapical cyst was seen in relation to maxillary left central and lateral incisors. Conventional endodontic treatment was started. Since it was not successful, apical surgery was performed. Bone augmentation was done using PRF in combination with β-TCP bone graft to achieve faster healing of the periapical region. Regular followups at 3, 6, 9, and 12 months were done. Results. Healing was uneventful. Follow-up examinations revealed progressive, significant, and predictable clinical and radiographic bone regeneration/healing without any clinical symptoms. Conclusions. Combined use of PRF and β-TCP for bone augmentation in treatment of periapical defects is a potential treatment alternative for faster healing than using these biomaterials alone.

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Objective: To evaluate the marginal quality of class II composite restorations using a bulk fill composite when restored in bulk compared to an incremental filling technique following two different modes of bonding, total etch and self-etch technique. Methods: Forty-eight standardized class II box-shaped cavities were prepared on both the proximal surfaces of twenty-four mandibular molar teeth. Cavities were prepared with no-245 carbide bur on proximal surfaces. The teeth were divided into two groups, Group 1 which followed the self-etch strategy (n=12) and Group 2 which followed a total etch strategy (n=12). Each group was further divided into two subgroups based on the restorative technique followed, Sub group A – cavities on the mesial side which were bulk filled and Sub group B – cavities on the distal side which were incrementally filled. Specimens were placed in 2% methylene blue dye for 24 hrs and were then sectioned. Specimens were evaluated under stereomicroscope for microleakage. Data obtained was statistically analyzed using Kruskal Wallis test and Dunn’s multiple comparison test. Results: The results showed that between the two groups, the total etch technique showed the highest microleakage. Greater microleakage was observed in bulk fill technique when compared with incremental technique in group II. Conclusion: The degree of microleakage in a class II composite restoration is influenced not only by the adhesion strategy followed for the bonding agent, but also by the technique followed during composite restoration

Objectives: The aim of this study was to evaluate and compare the push-out bond strength of bioceramic sealer and resin-based sealer on Erbium-doped Yttrium Aluminum Garnet (Er:YAG) treated root canals. Material and Methods: Sixty single-rooted teeth were collected, decoronated apical to the cementoenamel junction, maintaining the minimum root length of 14 mm. Samples were instrumented with WaveOne Gold primary file and divided into two experimental groups (n = 30), based on laser irradiation: Group I: No laser and Group II: Er:YAG laser irradiated. Groups I and II were again divided into two subgroups “a” (AH Plus) and “b” (mineral trioxide aggregate [MTA] Fillapex) with 15 samples in each group. As per the grouping, sealers were coated onto the canal walls and obturated. After 24 h of storage in 100% humidity at 37°C, all the samples were sectioned transversely and push-out test was performed using universal testing machine. Stereomicroscope was used to determine the mode of failure. A one-way analysis of variance was employed to compare the mean POBS. Kolmogorov–Smirnov and Shapiro–Wilk parametric tests were done to check the normality. The Games-Howell multiple post hoc test was used for pairwise comparison of the groups at a 95% confidence level. Results: Both AH Plus and MTA Fillapex exhibited higher bond strength in the laser-treated canals. AH plus exhibited superior bond strength compared to MTA Fillapex in both laser and non-laser-treated groups (P < 0.05). AH Plus groups have predominantly presented cohesive failure whereas MTA Fillapex presented mixed failures. Conclusion: Irradiation with Er:YAG laser in the root canal before obturation improves the bond strength significantly. The adhesive properties of MTA Fillapex are comparable to that of AH Plus.