The effects of different cavity disinfectants on fracture resistance of tooth fragment reattachments.

Purpose: This study was conducted to investigate the fracture strength of reattached tooth fragments after different cavity disinfection protocols. Materials and methods: Incisal edges of 144 bovine incisors were sectioned and then randomly divided into 4 different groups as follows: Group C: no disinfectant; Group NaOCl: 2.5% sodium hypochlorite solution; Group NaOCl+Asc: 2.5% sodium hypochlorite followed by 10% ascorbic acid solution; Group CHX: 2% chlorhexidine solution. Teeth were further divided into 3 subgroups according to universal adhesive (G-Premio Bond, Scotchbond Universal, Prime and Bond Universal). Fracture resistance was evaluated using a universal testing machine. Data was analyzed using 2-way ANOVA with Bonferroni tests. Results: Cavity disinfectant had a statistically significant effect on bond strength (p<0.05), with the highest bond strength detected in the NaOCl+Asc Group (148.22 ± 51.64) and the lowest in the NaOCl Group (112.84 ± 43.12). Scotchbond Universal exhibited the highest bond strength values (163.59 ± 49.94); however, there were no significant differences between the other adhesive systems (p> 0.05). Conclusion: Application of ascorbic acid following sodium hypochlorite treatment can improve dentin bond strength.

Evaluation of parents' knowledge, attitudes, and practices regarding self-medication for their children's dental problems during the COVID-19 pandemic: a cross-sectional survey.

BACKGROUND: Self-medication refers to taking medicine without consultation with a doctor or dentist, and it is an important health issue, especially during the COVID-19 pandemic. There are no data about parents' SM practices for their children's dental problems during the COVID-19 pandemic. The present study aims to evaluate parents' knowledge, attitudes, and practices regarding self-medication for their children's dental problems during the COVID-19 pandemic in Northern Turkey. METHODS: A cross-sectional survey was carried out in the pediatric dental clinic at Ondokuz Mayis University, Faculty of Dentistry, Department of Pediatric Dentistry, immediately after the COVID-19 lockdown ended. A total of 389 parents who agreed to participate in the study completed the questionnaire from July 1 to October 1. A questionnaire with 18 items was designed to collect information on the parents' knowledge and attitudes regarding when, why, and how to use drugs and on their practices on medicating their children. The collected data were analyzed using descriptive and analytical statistics (chi-square test). RESULTS: The majority of parents (n = 273; 70.2%) practiced self-medication for their children's dental problems. Self-medication with a previously prescribed medications was usually preferred by parents (n = 179; 62.2%). Analgesics (98%) were the most commonly used medicines by parents in their self-medication for their children's dental problems. CONCLUSION: Prevalence of self-medication practices for children's dental problems is high in Turkey during the COVID-19 pandemic. Therefore, new healthcare services, such as teledentistry, may be useful to overcome problems related to the self-medication of children during times when the ability to reach healthcare providers is limited, such as during pandemics.

Primary Fused Teeth and Findings in Permanent Dentition.

OBJECTIVE: The aim of this study was to investigate the characteristics of primary fused teeth (PFT) and their effect on permanent dentition in a group of Turkish children. SUBJECTS AND METHODS: Dental records of 13,450 pediatric patients who attended the Pediatric Dental Clinic in northern Turkey between 2015 and 2017 were reviewed. Forty patients had been diagnosed with PFT and were included in the study. Clinical and radiographic examinations were conducted, and the distribution of PFT was calculated by type, sex, affected jaw, associated dental anomalies, and clinical complications. Data analysis involved descriptive statistics. RESULTS: A total of 50 PFT were detected in the 40 patients. The mean age of patients was 6.7 ± 0.3 years (range 3-10 years). The most common PFT were the mandibular lateral incisors and canines (34, 68%). The most prevalent type of PFT was type III (20, 40%). Of the 40 patients with PFT, 34 (85%) also ex-hibited other dental anomalies such as tooth aplasia, peg-shaped incisors, talon cusps, ectopic eruption, and delayed eruption in both related and unrelated areas. The most common complications of PFT were fusion-related tooth aplasia (n = 26 [76%]) and caries formation in the affected teeth (24 [48%]). CONCLUSION: In this study, PFT were frequently observed in the mandibular anterior region. Caries formation and dental anomalies, especially permanent tooth aplasia, were often encountered in areas where PFT were seen. Hence, parents should be informed about possible dental problems associated with PFT and be encouraged to schedule regular follow-up appointments.

Effect of Fluoride Varnish Containing CPP-ACP on Preventing Enamel Erosion.

This study aimed to investigate the effect of a fluoride varnish with added casein phosphopeptide-amorphous calcium phosphate treatment on the prevention of enamel erosion, and it compared the results with those of other fluoride varnishes. Fifty enamel specimens obtained from bovine incisors were randomly divided into five groups (n = 10) based on the type of surface pretreatment used: intact enamel (Group 1); intact enamel+erosive cycles (Group 2); intact enamel+MI varnish+erosive cycles (Group 3); intact enamel+Clinpro White varnish+erosive cycles (Group 4); and intact enamel+Duraphat varnish+erosive cycles (Group 5). The specimens were subjected to erosive cycles for five days. The surface roughness was evaluated using atomic force microscopy. The results were statistically analyzed using one-way ANOVA and Tukey's tests. Group 1 had the smoothest surfaces. After the erosive cycles, the greatest surface roughness values were observed in Group 2, followed by Groups 5, 4, and 3, respectively. Statistically significant differences were observed among all groups (p < 0.05). The application of fluoride varnishes had some positive effects on preventing enamel erosion; however, the most effective agent was fluoride varnish with added casein phosphopeptide-amorphous calcium phosphate.

A Comparative Study of Oral Health Parameters in Molar Incisor Hypomineralization and High-Caries-Risk Children Aged 8-11 Years.

OBJECTIVE: To compare oral health parameters: decayed missing filled teeth (dmft, DMFT), gingival index and plaque index in high-caries-risk children and children with molar incisor hypomineralization (MIH). SUBJECTS AND METHODS: A study group of 81 children affected by MIH (49 girls, 32 boys) aged 8-11 years (mean 9.4 ± 1.1) was race-, age- and sex-matched with 81 high-caries-risk children not affected by MIH (controls). The MIH and control groups were divided into four subgroups according to age. The oral health parameters of both groups were recorded under clinical conditions. Mann-Whitney U and Kruskal-Wallis tests were used to compare the differences in the number of MIH-affected teeth between the groups. Other traits were evaluated with the ANOVA test, and Duncan's multiple comparison tests were used for comparing means. Linear and ordinal regression analyses were used to model the variables. RESULTS: The mean age of the participants was 9.4 ± 1.1 years, and the mean number of affected teeth was 7.7 (range 3-12) in the MIH group. The number of affected teeth and severity of MIH did not change significantly with age and sex (p > 0.05). A comparison of the oral health parameters of MIH-affected and control children according to groups did not show any statistically significant differences between the groups for all parameters for all groups (p > 0.05) with the exception of DMFT values at 10 years of age (p < 0.05). In a comparison of the total scores without taking age into account, the children with MIH showed a significantly higher DMFT value than the children without MIH (p < 0.05), but there were no significant differences between the dmft, GI and PI values of the study groups (p > 0.05). CONCLUSION: The children in the MIH group had higher DMFT than those without MIH. Hence, the presence of MIH could have a detrimental effect on oral health parameters, especially on DMFT values.

Water Sorption, Solubility, and Color Stability of Giomer Restoratives.

OBJECTIVES: This study compared the color stability, water sorption, and solubility of a giomer composite and two nanohybrid composite resins. MATERIALS AND METHODS: Disc-shaped specimens (1-mm thickness × 15-mm diameter) of a giomer (Beautifil II, Shofu, Kyoto, Japan) and two nanohybrid (Filtek Z550, 3M ESPE, St. Paul, MN, USA; Tetric N-Ceram, Ivoclar Vivadent, Schaan, Liechtenstein) composites (N = 10) were prepared. Baseline color measurements were taken, and specimens were immersed in water for 28 days. Following immersion, color values were remeasured, and color-change values (ΔE) were calculated. Water sorption and solubility were assessed by mass gain or loss after storage in water for 28 days. Data were analyzed with one-way analysis of variance and Tukey's post-hoc tests (p = 0.05). Pearson's correlation test was used to assess possible correlations between water sorption and solubility, water sorption and color stability, and solubility and color stability (p = 0.05). RESULTS: Water sorbtion (%) and color change (ΔE) varied significantly among groups, with Beautifil II exhibiting the highest values (p < 0.001). No statistically significant differences were observed in water solubility values among the groups (p = 0.661); however, a linear, positive correlation was detected between solubility and discoloration (r = 0.368, p = 0.046). CONCLUSION: Water sorption and discoloration values of the giomer composite group were significantly higher than those of the nanohybrids tested. CLINICAL SIGNIFICANCE: The high levels of water sorption and discoloration of giomer composites are likely to have an adverse effect on esthetic restorations.

Bond strengths of silorane- and methacrylate-based composites to various underlying materials.

OBJECTIVE: To evaluate shear bond strength (SBS) values of a methacrylate (FZ 250) and a silorane-based (FS) resin composite to various underlying materials. MATERIALS AND METHODS: A total of 80 samples were prepared with four different underlying materials; a flowable (FLC) and a bulk-fill flowable composite (BFC), and a conventional (CGIC) and resin modified glass-ionomer cement (RMGIC). These underlying materials were laminated plus to methacrylate or silorane-based resin composites (n = 10). To evaluate the specimens SBS values were evaluated with a universal testing machine (cross-head speed; 1.0 mm/min). Statistical comparisons were carried out using two-way ANOVA and Tukey's post hoc test with a significance level of P < 0.05. RESULTS: SBS values for FZ250 were significantly higher than for FS for all of the underlying materials tested (P < 0.05). SBS values of FZ250 to BFC were significantly higher than to all other materials (P < 0.05), whereas SBS values of FS did not vary significantly according to underlying material (P > 0.05). CONCLUSION: The use of FS in conjunction with any of the tested materials showed lower SBS than the FZ 250. Also, new low elastic modulus liner BFC presented slightly good interfacial adhesion so, the usage of BFC as an underlying material may be preferable for FZ 250.

Solubility of two resin composites in different mouthrinses.

AIM: This study aimed to compare the solubility of a universal restorative resin composite (Filtek Z250; FZ250) and a silorane-based resin composite (Filtek Silorane; FS) after immersion in alcohol-containing mouthrinse, alcohol-free mouthrinse, and artificial saliva. METHODS: 30 discs (10 mm × 1 mm) were prepared from each material and desiccated until a constant mass was obtained. Specimens were immersed in the test solutions for two days and desiccated again. Solubility was calculated based on the change in weight of each specimen before and after immersion. Data was analyzed using two-way ANOVA and Tukey's Post Hoc test (P < 0.05). RESULTS: Solubility values for both resin composites were the highest in the alcohol-containing mouthrinse. FZ250 showed greater solubility than FS; the difference was only significant in artificial saliva. CONCLUSION: Both resin-composite materials tested exhibited some degree of solubility in each of the test solutions. The use of an alcohol-free mouthrinse may be preferable for patients with extensive composite restorations.

Shear bond strength of self-adhering flowable composite on dentin with and without application of an adhesive system.

PURPOSE: The aim of this study was to evaluate the shear bond strength (SBS) of conventional and self-adhering flowable resin composites on the dentin surfaces of primary and permanent teeth and to evaluate the effect of the application of an adhesive system under self-adhering flowable resin composite on SBS. METHODS: Prepared permanent and primary tooth dentin surfaces were randomly distributed into 3 groups according to application protocols as follows: group 1: Vertise Flow; group 2: OptiBond + Filtek Ultimate; and group 3: OptiBond + Vertise Flow. A universal testing machine was used to measure SBS of prepared specimens, and data were analyzed using 1-way ANOVA and Tukey test. RESULTS: Statistically significant differences were observed among all groups for primary and permanent teeth (P<0.05). The highest values were observed in group 2, followed by group 3, in both permanent and primary teeth. SBSs of all groups were significantly higher for permanent teeth than for primary teeth (P<0.05). CONCLUSION: Although SBS values of Vertise Flow groups were lower than those for conventional flowable resin composite groups, with further developments in material technology, self-adhering materials could be promising materials especially for pediatric dentistry.

Multidisciplinary management of a fused tooth: a case report.

Objective. Fusion is a dental anomaly that arises through the union of two adjacent teeth. The case report presents multidisciplinary management of a fused maxillary anterior tooth. Case Report. A 10-year-old boy was referred to the pediatric dental clinic with the chief complaint of a large upper anterior tooth. Intraoral and radiographic examinations indicated fusion between the permanent maxillary right central incisor and a supernumerary tooth. According to the treatment plan, the fused tooth was sectioned, and the mesial portion was removed. The remaining tooth section was restored with composite resin, and the diastema between the central incisors was closed with orthodontic treatment. After an 18-month followup period, the tooth showed no sign of pathosis. Conclusion. The technique described here offers a simple and effective method for restoring a fused tooth that reestablishes function, shape, and esthetics.

Timing of permanent teeth eruption in Turkish children.

OBJECTIVE: To identify the mean time of permanent teeth eruption in children aged 5-15 years in Samsun, Turkey. STUDY DESIGN: A total of 1,491 children aged 5-15 years (Female: 773; Male: 718) were included in this study. Teeth were recorded as either "not erupted" or "erupted," which was defined as having at least one cusp visible in the oral cavity. Differences between eruption times for males and females and for maxillary and mandibular teeth were analysed using independent t-tests. RESULTS: Eruption tended to be earlier in females than in males, but this difference was significant only for maxillary and mandibular canines and mandibular first premolars (p < 0.05). For both females and males, the first teeth to erupt were the central incisors and first molars, and the last to erupt were the second premolars, molars and canines. Mandibular incisors and canines erupted significantly earlier than their maxillary counterparts in both females and males (p < 0.05). CONCLUSION: In comparison with other studies, eruption times ofpermanent first molars, central and lateral incisors were delayed by several months, whereas eruption times of other teeth were accelerated by several months. The findings regarding eruption times should be considered when planning dental treatment.