Effect of preetching on microleakage with all-in-one adhesives using calcium-based desensitizers: An in vitro study

Objectives: The aim of this study was to evaluate the effect of calcium-based desensitizers on the microleakage with and without preetching enamel in Class V cavities restored with all-in-one adhesives. Materials and Methods: Class V cavities were prepared on the buccal surfaces of 100 extracted human premolars. A total of 100 box-shaped cavities were divided into five groups (n = 20). Group 1 – no desensitizer was applied and Groups 2 and 4 – desensitizer (CCP-ACP and Novamin) was applied, respectively, followed by the application of G-Bond and restored with composite restoration. Groups 3 and 5 are same as Group 2 and 4, but preetching of enamel was done for 3 s after desensitizers application. The teeth were thermocycled and the specimens were examined for microleakage using methylene blue as a marker. The teeth were sectioned buccolingually and evaluated for microleakage under stereomicroscope and the scores obtained were analyzed with Kruskal–Wallis and Mann–Whitney tests. Results: Statistically significant difference existed between Groups 2 and 3 (P < 0.05). There was also statistically significant difference between Groups 4 and 5 (P < 0.05). Groups 3 and 5 showed significantly less microleakage (P < 0.05). No statistically significant difference in microleakage values was observed between the two desensitizers CCP-ACP and Novamin. Conclusion: The application of calcium-containing desensitizers with selective etch enamel technique in all-in-one adhesives could be considered an advisable procedure to minimize microleakage

Comparative evaluation of cleaning ability of reciproc and waveonegold reciprocating file systems – A scanning electron microscopic study

Objective: The aim of this study was to evaluate the canal cleaning ability of two reciprocating single file systems: Reciproc (VDW, Munich, Germany) and WaveOne gold (Dentsply Maillefer, Ballaigues, Switzerland) using scanning electron microscopy (SEM). Materials and Methods: Forty freshly extracted human mandibular premolar teeth with single root and canal were selected. The samples were randomly divided into two experimental groups (n = 15 each). Control group (n = 10) has non-instrumented teeth. Working length was determined using #10/15 K files. All the teeth were prepared to a # 25 final apical size following the manufacturer's instructions using crown-down technique. Teeth were sectioned buccolingually and examined under SEM at 20.0 kV and ×700 magnification. SEM images of the coronal, middle and apical third of the canal were taken and then analyzed using a five-score index. Results: The WaveOne Gold group presented a larger amount of debris than the Reciproc Group, however, without a statistically significant difference (P > 0.05). A larger amount of debris in the control group was observed, with the statistically significant difference between Reciproc and WaveOne Gold groups (P < 0.05). Conclusion: The two reciprocating single-file instrumentation systems presented similar effectiveness for root canal cleaning

Comparision of apical leakage between immediate versus delayed post space preparation using various root canal sealers: An invitro study

Aim of the study: The present study evaluated the apical leakage of endodontic sealers after immediate and delayed post space preparation. Methodology: Sixty-six extracted human maxillary incisors with straight root and single canals were selected and decoronated. They were divided into five groups and obturated using three different sealers (AH Plus sealer, Apexit Plus sealer, Bioceramic sealer) respectively. Specimens were longitudinally sectioned and were observed under stereomicroscope. Results were analyzed and tabulated. Results: There was a statistically significant difference between the immediate and delayed post space preparation. Immediate post space preparation showed less leakage compare to delayed post space preparation. Conclusion: Bioceramic Sealer showed the least leakage at different intervals of post space preparation followed by AH Plus sealer.&nbsp; Apexit Plus showed more leakage among the groups at different intervals

Comparision of Apical Leakage Between Immediate Versus Delayed Post Space Preparation Using Various Root Canal Sealers: an Invitro Study

Aim of the study: The present study evaluated the apical leakage of endodontic sealers after immediate and delayed post space preparation. Methodology: Sixty-six extracted human maxillary incisors with straight root and single canals were selected and decoronated. They were divided into five groups and obturated using three different sealers (AH Plus sealer, Apexit Plus sealer, Bioceramic sealer) respectively. Specimens were longitudinally sectioned and were observed under stereomicroscope. Results were analyzed and tabulated. Results: There was a statistically significant difference between the immediate and delayed post space preparation. Immediate post space preparation showed less leakage compare to delayed post space preparation. Conclusion: Bioceramic Sealer showed the least leakage at different intervals of post space preparation followed by AH Plus sealer.&nbsp; Apexit Plus showed more leakage among the groups at different intervals