RESUMEN
Objectives: this study aimed to investigate dentinal crack rate following parapulpal pin insertion in anterior primary teeth
Methods: thirteen sound freshly extracted primary canine teeth were horizontally sectioned 1 mm above the cementoenamel junction [CEJ]. All samples were thoroughly inspected to ensure that the teeth had no cracks. The teeth were then mounted in acrylic blocks, and subjected to drilling and insertion of a single parapulpal pin in the prepared hole. The teeth were then sectioned perpendicular to the already prepared surface at 1, 2 and 3 mm depths for further evaluation under a stereomicroscope [×12 and ×25 magnifications]
Results: no crack or crazing was observed in teeth in the control group while one out of 11 teeth in the case group had a crack
Conclusion: the use of 0.53 mm diameter self-threading pin did not increase the risk of crack formation in dentin of anterior primary teeth prior to composite restoration
RESUMEN
Objective: the aim of this study was to assess the effect of condensation pressure on microleakage of mineral trioxide aggregate [MTA]
Methods: this in vitro experimental study was conducted on 55 sound single-rooted straight-canal extracted human teeth. The teeth were sectioned at the cementoenamel junction [CEJ] and at 3 mm above the root apex. The roots were mounted in putty. Samples were then divided into three experimental groups [n=15] and positive and negative control groups [n=5]. After filing of the root canals to file #50, white ProRoot MTA paste was prepared according to the manufacturer's instruction and applied to the canals using condensation pressure of 0.44, 3.22 and 8.88 Mpa in groups one to three, respectively. After a 48-hour setting time, each root was connected to the fluid filtration system to measure microleakage. The mean microleakage rate of the groups was calculated and compared using one-way ANOVA and least significant difference test
Results: the mean microleakage with condensation pressure of 0.44, 3.22 and 8.88 MPa was 1.70×10[-4], 1.17×10[-4] and 0.48×10[-4] microL/minute, respectively. One-way ANOVA showed that the mean microleakage rate was significantly different among the groups [P<0.05]. The lowest microleakage was observed in condensation pressure of 8.88 MPa
Conclusion: within the limitations of this study, the results showed that increase in condensation pressure decreased the rate of microleakage
RESUMEN
Epidermolysis bullosa [EB] is a group of rare inherited skin and mucous membrane disorders in which blister formation may arise spontaneously or following a minor friction. Various patterns of inheritance are explicated for the disease. The disease has a profound effect on oral mucosa and may result in high prevalence of dental caries. General anesthesia is sometimes the only choice for dental treatments in patients with EB. The following case report describes the dental and anesthetic management of an 12.5 -year-old girl with dystrophic type of EB. The patient was followed up every 6 months. New carious lesions were detected one year after the treatment, on the last visit. Presenting a perfect dental care to children with this disorder can be challenging for the in charge specialist, both pediatric dentist and anesthesiologist
RESUMEN
Denture cleansing is a key element in retaining mucosa free of any inflammation. However, many denture users usually ignore this important factor. This investigation was designed to compare the efficacy of a denture brush and an ordinary brush in cleansing process of complete dentures. A group of 31 individuals aged 44-76 years were included in this study. Each patient was then instructed to use the denture brush for a period of 4 weeks while an ordinary brush was to be used for the following 4 weeks. Dentures were photographed and evaluated at every two week intervals using a computer photographic software assessment method. Pictures were compared using the image tool for plaque remaining on the denture surfaces. Student t-test was used to analyse data collected. Comparison of the brush type efficacy at 2 and 4 weeks did not show any significant difference [P>0.05], however, clinical evaluation indicated that denture brush leaves much less plaque bio-film compare to the ordinary one, with mean plaque traced at 6.88 to 9.24 in 4 weeks. There were no significant differences found between the two brushes' efficacy, with clinical evaluation significantly in favor of denture brush
RESUMEN
Pit and fissure sealant, is considered as a safe and effective method to prevent dental caries especially at the occlusal surface of permanent posterior teeth. There are several reporting controversies on the use and absence of tooth prepare before sealant application, and its effect on sealant retention. The aim of this study was to evaluate the effect of brushing with pumice on pit and fissure sealant retention, in an invivo situation. A clinical trial was performed on a group of 31children with the Total of 100 permanent teeth. Teeth were divided randomly into two groups of case and control, .In each person similar sealant material was applied on teeth. In the case group, brushing step with pumice was omitted before etching the enamel. Sealant retention was then evaluated after a 6 month period using chi - square test. Retention between two groups, were not statistically significant using chi - square test. There was 77% of success observed in the case group compare to 72% in control group. Therefore, the failure rate estimates 23% in case and 28% in control group. Brushing with pumice did not have a great effect on clinical sealant retention [after 6 month], and removing this step seams not interfering with the sealant retention