RESUMO
Extensive caries in the primary anterior teeth is one of the highly prevalent dental issues in primary dentition. On the other hand, special considerations for restoring these teeth are a challenge for the dental practitioner. The aim of this in vitro study was to compare the tensile bond strength of a new method of Reverse Metal Post Technique [RMPT] with two conventional methods. Eighty-four extracted primary canines were assigned to three equal groups. The crowns were cut-off 1 mm coronal to CEJ and the root canals were prepared for the next stage. The teeth were restored according to the groups they were assigned to; Group 1 with composite posts; Group 2 with alpha-shaped orthodontic wires; and Group 3 with the RMPT. The specimens were then subjected to tensile force by a mechanical testing machine. Data were analyzed using ANOVA, tukey post hoc, Chi-square and student t test [alpha =0.05]. The mean tensile bond strength for groups 1, 2 and 3 were 6.26 +/- 2.40, 7.35 +/- 1.60 and 9.88 +/- 2.60MPa, respectively. A significant difference was observed between group 3 and the two other groups [p<0.001]. However, the difference between groups 1 and 2 was not statistically significant [p>0.05]. The tensile bond strength was significantly higher in RMPT than the two conventional methods used for restoring severely destroyed primary anterior teeth
RESUMO
Some children show aggressive uncontrollable behavior during dental procedures, the only way to control this behavior is pharmacological methods such as conscious sedation. Recently intranasal administration ofmidazolam has been considered. The main goal of our study is to determine the effectiveness of intranasal administration ofmidazolam [in a does of 0.5 mg/kg] in behavioral management of uncooperative children. In this study 30 healthy, uncooperative children of 3 to 5 years old were evaluated. At the beginning of each session, we tried to use ordinary techniques of behavioral management in treatment of patients. In the case of unsatisfactory response intranasal midazolam was immediately used. To determine the affectivity of the drug, evaluation of child behavior before and after administration of midazolam was undertaken, using Houpt rating scale of general behavior.A statistically significant difference was demonstrated in patients behavior before and after administration of intranasal midazolam [based on Houpt rating scale of general behavior]. Thus we concluded that this drug is effective in sedation and reducing the anxiety of children under treatment. Although the results are indicative of a positive effect of drug in sedating patients, this is not indicating that a child with a behavioral score of 1 or 2 of Houpt scale will be changed to a child with scores of 5 or 6 after administration of the drug. In fact this drug makes children more controllable in comparison to their previous condition and reduces their range of movement and crying so that dentist will be able to work in a relatively more suitable condition. Midazolam has the most effect in children who have a greater potential to cooperate and have a mild to moderate degree of anxiety