In vitro performance of ultrasound enamel preparation compared with classical bur preparation on pit and fissure sealing.

AIM: Fissure sealants are effective in preventing caries. The aim of this in vitro study was to evaluate the effects of two different enamel surface preparation techniques for pit and fissure sealing. MATERIALS AND METHODS: Sixty extracted sound third molars were used. For each tooth, the mesial half of the occlusal fissures was treated with ultrasound diamond tip T1 mounted on an ultrasonic handpiece, while the distal half with conventional diamond bur. The teeth were randomly divided into 2 groups (n = 30/each). Group 1 samples were stored in distilled water at 4 °C. For group 2 samples, sealing of occlusal fissures was performed according to standard procedures. Bucco-lingual cuts parallel to the long axis of the tooth were made in order to separate the two different types of preparations. The effects of the executed procedures were assessed with SEM. RESULTS: Surfaces prepared with ultrasound system showed the presence of residual debris and appeared more irregular than surfaces prepared with traditional bur system. Furthermore, images showed the presence of cracks on the bottom and on the walls of the ultrasound prepared fissures. CONCLUSION: Conventional bur surface treatment showed a better performance when compared to ultrasound preparation and could probably ensure superior sealant retention.

An experimental in vivo procedure for the standardised assessment of sealants retention over time.

AIM: The elaboration of an experimental system to obtain reproducible and comparable photographs of the occlusal surface to monitor sealants retention. MATERIALS AND METHODS: An intraoral camera connected to a computer was used to obtain photos of the occlusal surfaces. A specific software was utilized to perform measurements on archived pictures. An experimental two-part system, consisting of a dental arch support and a camera support, connected to each other through holes and pins, was made to obtain a standardised and reproducible placement of the camera in the mouth. In the first part, to test the degree of reliability of the procedure and the percentage of image distortion, 120 first molars were sealed and for each molar ten photographs were taken, using the intraoral camera connected with the dental arch support, the camera support and the dedicated software. In the second part, 165 first molars were sealed and photographed, as above described, immediately after sealing (T0), 6 months (T1) and 1 year later (T2). With the software, the sealed areas were measured. The comparison of the selected sealed areas between T0 and T1, T0 and T2, T1 and T2 determined the percentage of sealant loss. RESULTS: In the first part, the experimental procedure showed a reliability of 96.85%. In the second part, the difference in the rate of lost sealant between T0-T1 and T1-T2 was statistically significant (p <0.001). STATISTICS: ANOVA analysis was made. CONCLUSIONS: Photographs, obtained through the experimental two-part system, allowing a reproducible positioning of the intraoral camera in oral cavity, could represent a standardised and useful method to monitor sealants retention over time.

Assessing changes in oral health-related quality of life and body growth in 3-5 years old children following dental treatment under general anaesthesia due to severe dental caries.

AIM: To evaluate the impact of oral treatment under general anaesthesia (GA) on oral health-related quality of life (OHRQoL) in children with severe dental caries; to assess the effect of dental treatment under general anaesthesia on children's weight (Wt), height (Ht) and Body Mass Index (BMI). METHODS: One hundred uncooperative 3-5 years old children were selected. OHRQoL, assessed with the Early Childhood Oral Health Impact Scale (ECOHIS), Ht, Wt and BMI were measured at baseline and after 1 year from dental treatment under general anaesthesia. STATISTICS: All statistical procedures were performed using the Statistical Package for the Social Sciences (SPSS for Windows). ANOVA analysis was made to assess the effect of GA procedures on oral health quality of life in uncooperative children. RESULTS: After 1 year, the reductions for the ECHOIS components were statistically significant (P < 0.0001). Children showed a significant improvement in relation to pain, eating, sleeping and behavioural problems. At follow-up, there was a significant improvement in the anthropometric measures: 55% of children increased the percentile curves for weight and BMI; 44% for height. CONCLUSIONS: One year after a complete treatment under GA, both the OHRQoL and the growth improved.

Oral health status and Unmet Restorative Treatment Needs (UTN) in disadvantaged migrant and not migrant children in Italy.

AIM: Despite a global decline in caries experience in children, dental caries remains a common and persistent public health problem, being more prevalent among socioeconomically disadvantaged groups. The aim of this survey is to evaluate DMFT index, caries prevalence and Unmet Restorative Treatment Needs (UNT) index in migrant and not migrant children with low income, in Campania region (Italy), in order to plan and build up strategies for promoting dental health in children and adequate health care for vulnerable groups. MATERIALS AND METHODS: A sample of 553 children (age range: 12-14 years old) were recruited from volunteer patients at a charitable foundation in Naples (Italy) and were categorised into 2 subgroups, according to their status of "migrant" or "not migrant". Parents completed a questionnaire in order to investigate demographic and oral health behaviour. The participants were healthy and from low family income levels. DMFT scores and caries prevalence were calculated; UNT index was also calculated [D?(D + F)]%. The mean DMFT values related to the examined variables were calculated using one-way ANOVA. RESULTS: Mean DMFT and UTN index were 3.92±2.92 and 86.3% for migrants, and 3.29±3.21 and 68.4% for not migrants, respectively. The difference in the mean DMFT between the two groups was statistically significant (p=.027). Caries prevalence was 77.5% and 55.9% in the migrant group and in the not migrant group, respectively. High DMFT values were statistically associated to history of previous dental visit, sugar intake, brushing teeth once a day, and low mothers' educational level for both groups. CONCLUSION: Economically disadvantaged children showed high levels of dental caries. Furthermore, DMFT values, caries prevalence and unmet restorative treatment needs index among migrant children were higher than that of not migrant. In order to reduce inequalities in dental caries experience, there is a need to design policies aimed at primary prevention through health promotion programmes.