This study presents the findings of a record review that evaluated the prevalence of dental trauma in patients with cerebral palsy and evaluated its possible relationship with age, type of palsy, and epilepsy. The dental records of 2,200 patients with special needs admitted to the special care clinic of the School of Dentistry of Araçatuba/UNESP, Brazil, between 1998 and 2003 were reviewed. Of the records that were analyzed, 500 patients who had cerebral palsy were selected for this study. Information regarding age, gender, type of palsy and dental trauma was collected and statistically analyzed. It was observed that 10.6% of the subjects (n = 53) had sustained dental trauma. The number of traumatized teeth was 84. Enamel or enamel/dentin fractures were the most frequent types of traumatic injury (84.9%). The permanent maxillary central incisors were the most commonly affected teeth (50%). The frequency of traumatic injuries showed no significant correlation (p> .05) with the type of cerebral palsy or gender and they were more frequent in subjects between the ages of 0 and 12 years. Having epilepsy was not a statistically significant risk factor (p> .05) for dental trauma.
No in situ protocol has assessed the dose-response effects of fluoride dentifrices involving low-fluoride formulations. ObjectiveTo assess the ability of an in situ remineralization model in determining dose-response effects of dentifrices containing low fluoride concentrations ([F]) on bovine enamel. Material and MethodsVolunteers wore palatal appliances containing demineralized enamel blocks and brushed their teeth and devices with the dentifrices supplied (double-blind, crossover protocol) separately for 3 and 7 days. Surface hardness (SH), integrated subsurface hardness (ΔKHN) and [F] in enamel were determined. Data were analyzed by ANOVA, Tukey's test and Pearson's correlation (p<0.05). ResultsDose-response relationships were verified between [F] in dentifrices and SH, ΔKHN and enamel [F]. Higher correlation coefficients between enamel [F] and SH and ΔKHN were obtained for the 3-day period. Significant differences in SH and ΔKHN were observed among all groups for the 3-day period, but not between 0-275, 275-550, and 550-1,100 µg F/g dentifrices for the 7-day period, nor between 3- and 7-day periods for the 1,100 µg F/g groups. ConclusionsConsidering that the peak remineralization capacity of the conventional dentifrice (1,100 µg F/g) was achieved in 3 days, this experimental period could be used in future studies assessing new dentifrice formulations, especially at low-fluoride concentrations.
Odontomas are developmental disturbances which manifest in the form of denticles or amorphous informes masses comprising all dental tissues, especially enamel and dentin, with variable amounts of pulp and cement.We describe here two clinical cases of odontomas in children, focusing on diagnostic means and the importance of early treatment of these lesions. The standard treatment for the two present cases was surgical removal.
Many professionals currently store their restorative materials in refrigerators, even though the manufacturers do not recommend this. This study evaluated the microleakage occurring in Class II restorations performed with composite resin stored at different conditions and temperatures. Thirty intact human molars were employed, which received vertical slot cavity preparations with the following dimensions: 3mm in buccolingual direction, 1.5mm in mesiodistal direction, and 5mm in cervico-occlusal direction (at 1mm short of the cemento-enamel junction). Specimens were restored with the adhesive material Prime & Bond NT and composite resin TPH Spectrum (Dentsply) with 3 different conditions: G-I application of restorative materials at room temperature (nearly 25oC), G-II application of restorative materials 30 minutes after removal from the refrigerator (25oC), and G-III application of restorative materials immediately after removal from the refrigerator (6oC). The specimens were sealed and immersed in 2% buffered methylene blue aqueous solution at 37oC, for 4 hours. Thereafter, the specimens were sectioned and evaluated as to the degree of marginal leakage at the dentin-cementum/restoration interface and also as to the type of dye leakage observed. Data achieved were submitted to statistical analysis by the non-parametric method Kruskal-Wallis (p<0.05) for comparison of the degree of leakage, and ratio test for comparison of differences in the pattern of leakage. No adverse effects were observed on the occurrence and pattern of microleakage when the restorative system was employed immediately after or 30 minutes after storage in the refrigerator, or at room temperature.
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