Aim: To assess the effects of common lactation teas on liquid sorption and color stability of three different dental composites. Methodology: A total of 60 samples (n = 5) were examined from three composite materials: Omnichroma (Tokuyama Dental Co., Tokyo, Japan), Estelite Posterior, (Tokuyama Dental Co., Tokyo, Japan), and Mosaic Universal (Ultradent production Inc., South Jordan, UT, USA). Samples measuring 2x6 mm were taken and immersed in three different teas—Humana (Humana, Bremen, Germany), Hipp, (Hipp, Pfaffenhofen, Germany), and Lactamil (Nutricia, Friedrichsdorf, Germany) —as well as artificial saliva. The measurements were recorded at baseline and on the 7th day. A sensitive analytical balance was used to measure liquid sorption, and a VITA Easy Shade device was used for color measurements. Absorption and Delta E values ​​were calculated. The data were analyzed using MANOVA at a significance level of (p<0.05). Results: Composite materials, solutions, and their interactions had a statistically significant effect on the sorption and Delta E values (p<0.001). The relative liquid absorption values among the composites were recorded as follows: Tokuyama>Mosaic>Omnichroma. Humana had the highest and Hipp had the lowest mean value among the solutions (p<0.001). For Delta E, Mosaic had the highest mean value among the composites, and Lactamil had the highest mean value among the solutions (p<0.001). Conclusion: Lactation teas cause discoloration in dental composites. In vitro and in vivo studies on color changes in dental composites are needed due to the sorption of these fluids.   How to cite this article: Özüdoğru S, Tosun G. Survival and clinical evaluation of various space maintainers used for early primary tooth loss. Int Dent Res 2021;11(Suppl.1):222-7. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.32     Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

In this study, it has been found that the use of total etch adhesive systems resulted in high leakage values.

Objective: To assess the in vitro performance of high-definition (HD) US, CBCT and periapical radiography for the visibility of proximal and recurrent caries in teeth with and without restoration. Methods: A total of 240 molar teeth were divided into eight groups each comprised of 30 teeth. Control groups consisted of teeth without caries (Group 1–4; N = 120), whereas diseased groups consisted of teeth with proximal caries (Group 5–8; N = 120 teeth). Finally, a total of four image sets were obtained as follows: i) PSP periapical radiography, ii) CBCT 0.075 mm voxel size, iii) CBCT 0.2 mm voxel size and iv) HD US images. The image sets were viewed separately by four observers by using a 5-point confidence scale. Intraclass correlation coefficients were calculated. The areas under the ROC curves were compared using chi-square tests. Significance level was set at α = 0.05. Results: Intraobserver agreement for both readings for the four observers ranged between 0.848 and 0.988 for CBCT (0.075 mm) images; 0.658 and 0.952 for CBCT (0.2 mm) images; 0.555 and 0.810 for periapical images; 0.427 and 0.676 for US images. Highest AUC values were found for CBCT (0.075 mm) images and lowest for US images. Statistically significant differences were found among CBCT (0.075 mm) images and US images (p < 0.001), CBCT (0.2 mm) images and US images (p < 0.001) and periapical images and US images (p < 0.001) for the detection of proximal caries. Conclusion: Periapical and CBCT images outperformed HD US imaging in the detection of proximal dental caries.

Aim:To evaluate the possible relationship between the position of the mandibular canal (MC) on digital panoramic images (PI) and the presence of a lingual concavity (LC) on Cone-Beam Computed Tomography (CBCT) scans in two different populations. Materials and methods:In this retrospective study, the digital archives of a private imaging center in Turkey and at The Academic Center for Dentistry Amsterdam (ACTA) in Netherlands patients who had both panoramic and CBCT images, taken between January 2016 and June 2016 due to various indications. A total of 248 patients were assessed. MC position was defined on digital panoramic radiographs; the presence of LC was assessed on CBCT images. In all statistical methods, p value <0.05 was considered statistically significant. The Mc Nemar test and the receiver operating characteristics (ROC) curve analysis (AZ), were performed for data analysis. Results: Considering all patients, the presence of LC was 28% and 31% for the left and right premolar regions and 75% and 77% for the left and right molar regions, respectively. There was no significant difference between right and left sides and between the Turkish and Dutch populations with respect to the presence of LC. Considering all patients, the presence of a LC was higher in the molar region than in the premolar region for both right and left sides with a statistical significance (p<0.001). Conclusions: The higher percentages of LC in the molar region in both populations suggests that a preoperative local CBCT assessment is justified specifically before implant placement in the mandibular molar region. The location of the MC on the PI was not a very strong indication of the presence of a LC.