The aim of this study was to assess the quality of the interface between dental root cement and some restorative materials used in the open sandwich technique. Standardised cavities were prepared on the buccal and oral surfaces of 30 human molars with the gingival margin situated in root cement. The teeth were randomly divided in 3 groups. Different materials combinations were used in buccal and oral cavities. In the control group, the cavities were filled only with composite resins (Filtek Z250-3M ESPE and Zmack Comp-Zermack). In the test groups the cavities were restored using an open sandwich technique as follows: in group 1 Filtek Z250 in combination with Dyract, respectively Ketac Molar Easymix; in group 2 Zmack Comp in combination with Dyract, respectively Ketac Molar. The teeth were stored in 1% methylene blue solution, for 24 hours. The samples were longitudinally sectioned through the centre of restorations and the degree of dye penetration as well as the morphology of the interface between the root cement and the restorative material were evaluated by optical microscopy and SEM. The results showed less microleakage and and adhesive failures in open sandwich restorations with Zmack Comp and Dyract combination.

The aim of the study was to investigate the effect of xylitol, from some oral hygiene products and chewing gums, on salivary parameters variation in patients with carious disease. The study was performed on 30 patients with a medium level of carious disease, randomly divided in two groups as follows: group 1 (study group), using xylitol-based products for 30 days, and group 2 (control group), using products without xylitol. The way of administration, dose, and frequency of use were as follows: toothpaste (normal daily brushing, 3 times daily); mouthwashing (5 ml, twice daily); chewing gums (two tablets, 5 times daily), for 30 days. The assessment targeted the salivary parameters as follow: saliva microcrystallisation index (IMK), resting salivary flow rate (RSF), stimulated salivary flow rate(SSF). The results of our study confirm the improvement of salivary parameters due to the use of xylitol-based products, by the positive influence on the remineralisation capacity of saliva. The assessment method of saliva IMK represents a noninvasive, simple, informational indicator for the assessment of the remineralisation capacity of saliva.

The aim of the study is to assess the action of a remineralizing product (calcium-phosphatefluoride-based varnish) on the saliva remineralization capacity on patients having dental erosions caused by frequent wine consumption. Methodology: The study group was made up of 15 patients who are frequent wine consumers. Unstimulated saliva was collected on the same day and at the same hour for each patient. A total amount of 0.5 ml of unstimulated saliva was placed on a glass plate, dried for 30 minutes in a thermostat at +37˚C, and then studied using a Nikon Eclipse E 600. The images were saved and stored on a computer. The IMK index was determined using the formula: IMK= number of the network areas filled with crystals/ number of the network areas projected on the entire saliva drop. The treatment plan for each patient included a five-week application of MI Varnish (GC Corporation) once a week. After 5 weeks IMK values were recorded again. Results: The mean value of IMK increased from 0.33 before treatment to 0.83 after treatment. The distribution of micro-crystallization categories varied from 86% Type II before treatment to 93% Type I after treatment. Conclusions: The fluor local treatment that uses varnishes containing casein phosphopeptide, tri-calcium phosphate, amorphous calcium phosphate and fluoride, increase the saliva remineralising potential and can be recommended both as preventive therapy and to counteract the erosive effect of acid oral environment on patients with dental erosions related to the frequent consumption of wine. Local treatment with GC Recaldent MI Varnish increased the remineralizing potential of saliva on patients with dental erosions due to wine consumption.

The study aimed to assess the changes of the surface roughness induced by some acidic beverages on indirect restorative materials by using profilometry. Twenty samples of three composite resins (Ceramage, SR Adoro, Luna-Wing) and three ceramics (IPS In Line, Hera Ceram, Reflex Dimension) immersed in three acidic beverages (Red Bul, wine, Coca Cola), for 5 minutes, three times daily, 14 days. The control samples were immersed in artificial saliva during the study periode. After the end of the erosive cycles and before to determine the surface roughness of the samples in the study groups, all the samples were immersed in artificial saliva for 18 hours. The surface roughness was determined in relation to the baseline surface using profilometer Perthometer_M1 (Mahr Gottingen GmbH, Germany). The immersion of the indirect restorative materials tested in the three acidic beverages lead has resulted to changes in their surface roughness. The most aggressive was wine, followed by Coca Cola, and Red Bull.

The aim of study was to compare the clinical effectiveness of 810nm laser therapy, remineralising therapy with MI PASTE PLUS� (GC), and toothbrush with Sensodyne� Repair&Protect (GSK) in cervical dentine hypersensitivity. The study was performed on 60 subjects (34 females, 24 males), with at least one tooth affected by cervical dentine hypersensitivity. The patients were randomly divided in three study groups (20 subjects for each group), related to the type of desensitizing therapy: 810nm laser therapy, remineralising therapy with gel MI PASTE PLUS�, toothbrushing with Sensodyne� Repair&Protect). The assessment of the therapy effectiveness was performed by analysis of Schiff Cold Air Sensitivity Scale, with scores directly related to the level of dentine hypersensitivity. For laser group the scores decreased from 2.25 at baseline, at 1.35 at 3 days, and 0.2 at 7 days, with significant statistical differences at 3 days, and 7 days comparing with baseline. For MI PASTE PLUS� (GC) study group the scores decreased from 2.20 at baseline, at 1.60 at 3 days, and 1.30 at 7 days, with significant statistical differences at 3 days, and 7 days comparing with baseline. For Sensodyne� Repair&Protect (GSK) study group the scores decreased from 2.15 at baseline, at 1.90 at 3 days, and 1.45 at 7 days, with significant statistical differences at 3 days, and 7 days comparing with baseline. Low level laser therapy showed better reduction in cervical hypersensitivity, followed by the therapy using MI PASTE PLUS� (GC) gel, and by the toothbrush with Sensodyne� Repair&Protect (GSK) toothpaste.