ABSTRACT
Objectives: This in vitro research was performed to assess the flexural and compressive strengths of EQUIA, GC Gold Hybrid (GH), and conventional glass ionomer cement (GIC) restorative materials. Materials and methods: This study compares three restorative. Materials: group I-EQUIA Forte GIC, group II-GC GH, and group III-conventional GIC for compressive and flexural strength evaluation. With a specially made Teflon mold, thirty-six cylindrical test specimens measuring 4 mm × 5 mm in dimension were created. They were then placed in 20 mL of deionized water and kept at 37°C for 3 hours every day for 30 days. Later, they were subjected to compressive strength and flexural strength using the universal testing machine. Statistics were used to examine each and every result. Result and Conclusion: EQUIA had the highest average compressive strength and flexural strength, whereas traditional GIC restorative material had the lowest.
ABSTRACT
Aim: The aim of this study was to assess the effectiveness of two various in-office newer desensitizing agents in reducing dentinal hypersensitivity in patients with mild-to-moderate sensitivity for a 1-month follow-up. Materials and Methods: Forty subjects with cervical dentin hypersensitivity (otherwise healthy patients) were included. A split-mouth, randomized clinical trial was conducted. A Visual Analog Scale (VAS) was used to record the initial sensitivity levels at the baseline visit. Each individual has been exposed to thermal (ethyl chloride spray) and evaporative (air blast) stimuli to elicit sensitivity. A single application of two different in-office desensitizing agents, Clinpro XT Varnish (3M ESPE, Minnesota, USA) and Shield Force Plus (Tokuyama Dental, Tokyo, Japan), was done. The sensitivity scores were recorded after the application of the desensitizing agent immediately, after 1 week, and after 1 month using both air and cold stimuli in the same manner as initially. Results: Mean VAS scores represent teeth that were more sensitive to cold stimuli compared to air blasts in both groups. For both stimuli at all-time intervals except baseline, there is a significant difference between CXT and SFP, with low mean VAS scores for CXT. Post hoc analysis revealed that in the CXT group, there is a significant difference in mean VAS score between pre-and postintervention at all-time intervals except between immediate and 1-week time intervals (P < 0.001) but only at immediate and 1-week time intervals in SFP. Conclusion: Clinpro XT Varnish is more efficient compared to Shield Force Plus at all-time points irrespective of the stimuli after a 1-month follow-up.
ABSTRACT
Every clinician as well as patient would prefer to sustain their natural teeth in all situations. For a badly mutilated terminal abutment, molar treatment options are limited, but loss of posterior tooth can lead to several unwanted sequelae. A guiding principle should be to preserve what is present. If complete preservation is not possible, the most conservative treatment should follow in every clinical situation. Radisectomy is one such conservative surgical treatment approach that allows resection of one or more affected roots of tooth at the level of furcation and preserves the remaining roots and the complete crown structure, thereby maintaining the occlusal harmony. Hereby, we are presenting a case report on radicectomy of distobuccal root of a mandibular third molar with persistent periradicular pathosis, with the assistance of microscope and cone-beam computed tomography.
ABSTRACT
Objectives: To compare and evaluate the bond durability, surface morphology, and remineralization of the adhesive layer with newer adhesive systems modified with novel bioactive nanoparticles. Methodology: Bonding agents evaluated in this study include (a) Conventional dentin bonding agent (CN-DBA) (b) Nanohydroxyapatite (nanoHAP) incorporated dentin bonding agent (NH DBA); (c) Silica doped nanohydroxyapatite (Si nanoHAP) incorporated dentin bonding agent (Si NH DBA). A total of 104 human dentin discs (5 mm × 5 mm × 2 mm) were sectioned. Elemental analysis (Ca/P ratio) and surface morphology of the adhesive layer with different dentin adhesives were evaluated under scanning electron microscopy with energy-dispersive X-ray analysis after speculated storage time of 1 day and 6 months. Microshear bond strength of adhesive restorations with different dentin adhesives was evaluated under universal testing machine and fractographic analysis under scanning electron microscope after speculated storage time of 1 day and 6 months. The results were analyzed using analysis of variance and post hoc analysis. Results: Si-NH-DBA showed highest mean microshear bond strength for both 1 day and 6 months, which was significantly higher compared to conventional nanofilled dentin bonding agent (CN-DBA) and NH-DBA. Si-NH-DBA group showed only 10% reduction in bond strength after 6 months, which was less compared to that of other groups. Similarly, Si-NH-DBA showed higher remineralization with stellate-shaped crystals at the adhesive layer after 6 months with hydrolytic resistant hybrid layer, compared to CN-DBA and NH-DBA. Conclusion: Silica-doped nanohydroxyapatite proved its efficiency on bond stability, remineralization, and hydrolytic resistance when incorporated into dentin bonding agents because of its bioactivity and carbonate-containing apatite-forming ability.
