ABSTRACT
BACKGROUND: Shade of the teeth is of specific significance to the patient because of social and psychological concern and hence plays vital role as primary care. Bleaching is a noninvasive, relatively inexpensive, conservative, and low-maintenance method to change a smile dramatically. AIM: To study the effect of application of three bleaching agents at different wavelengths of laser on the enamel surface of teeth using an environmental scanning electron microscopy (ESEM). MATERIALS AND METHODS: One hundred and twenty freshly extracted, noncarious intact maxillary central incisors were collected and stored in moist conditions in plastic containers. Using a randomized stratified design, the samples were divided into 12 groups (n = 10). The bleaching agent was mixed according to the manufacturer's instructions and applied on the enamel surface of the teeth followed by laser activation. The ultrastructural effects of the bleaching agent on the enamel were determined with an ESEM. Samples were assessed both before and after bleaching on the basis of the degree of surface damage. Because the observation by ESEM was designed to be qualitative, no statistical analysis was performed. RESULTS: JW power bleaching agent and Opalescence Xtra boost showed minimum surface alteration when compared to Polaoffice. Furthermore, the groups treated with diode 810 nm showed less surface damage while neodymium-doped yttrium aluminum garnet 1064 nm more surface alterations than the groups treated with diodes. CONCLUSION: From this current study, it can be concluded that the diode laser of 810 nm with JW power bleaching showed minimum surface alterations.
ABSTRACT
AIM AND OBJECTIVES: This study sought to evaluate and compare the fractured resistance of simulated immature teeth and the effect of single visit apexification versus complete obturation using MTA and biodentine. MATERIAL AND METHODOLOGY: Forty-five freshly extracted sound maxillary central incisors with single canal were selected. The apical 5 mm of each sample was then sectioned to simulate Cvek's stage 3 root development access cavity preparation, followed by preparation using peeso reamers. Irrigation was carried out followed by randomization of samples. Obturation was performed using different materials. Fracture resistance was checked under universal testing machine, by recording the ultimate load to fracture in Newtons. STATISTICAL ANALYSIS: Statistical analysis was performed using SPSS 20.0 Software. One-way analysis of variance followed by pair wise comparison of the groups was performed using Tukey's post-hoc test. The significance level was set at P < 0.05. RESULTS: All the experimental groups showed statistically higher value of fracture resistance than the control groups. Group I (entire canal obturated with MTA) reported highest value of fracture resistance followed by group III (entire canal obturated with biodentine), group II, and group IV. CONCLUSION: In apexification cases, reinforcing the immature teeth with bioceramic materials such as MTA and biodentine is advantageous. CLINICAL SIGNIFICANCE: Clinically in patients, high success rate of apexification can be achieved with complete MTA obturation as compared to MTA and biodentine apical plug and gutta percha obturation.
ABSTRACT
Radicular cysts associated with deciduous teeth are very rare. They constitute 0.5-3.3% of the total number of cysts in primary dentition. Radicular cysts involving deciduous teeth occur mostly in 3-19 years of age and has a male predominance. Enucleation with extensive removal of bone and vital teeth is preferred treatment for large radicular cysts and marsupialization can be preferred as a conservative approach to reduce morbidity. This paper presents a case report of a radicular cyst associated with a mandibular left deciduous first molar of a 7-year-old male child. The first premolar was displaced and the path of eruption was disturbed, horizontally placed below the first primary molar. The management comprised enucleation of the cystic sac and extraction of the involved permanent and primary teeth under general anesthesia.
