1,721,659 research outputs found
Randomised in situ trial on the effect of milk and CPP-ACP on dental erosion
Full text linkOBJECTIVES This randomised in situ study aimed to analyse the effect of milk (with or without 5ppm F) and CPP-ACP pastes (with or without 900ppm F) on dental erosion. METHODS The study was a seven phase (5 days each) crossover design involving 15 participants wearing intraoral appliances with enamel and dentine specimens. Specimens were extraorally eroded (erosive soft drink, 6×90s/day) and brushed (2×30s/day, 2N) using a non-fluoridated toothpaste (negative control). The test products were milk, milk+5ppm F (twice daily, each 100ml/2min), CPP-ACP paste, CPP-ACP paste+900ppm F (3min/day) or a SnCl2/AmF/NaF mouthrinse (positive control, 30s/day), which were applied immediately after erosion with the appliances in the oral cavity. In an additional group, a fluoridated toothpaste was used without any additional test product. Tissue loss was determined profilometrically after 5 days and statistically analysed by linear mixed models methodologies (p<0.05). RESULTS Compared with the negative control (non-fluoridated toothpaste only, enamel: 2.2±1.3μm; dentine: 3.8±2.2μm), enamel and dentine loss was significantly reduced by the use of fluoridated toothpaste (enamel: 1.1±1.0μm; dentine: 2.4±1.7μm) and the SnCl2/AmF/NaF mouthrinse (1.5±1.5μm; dentine: 1.8±1.9μm). CONCLUSIONS Milk and CPP-ACP were not effective in reducing enamel and dentine loss significantly, independently of the presence of fluoride. CLINICAL SIGNIFICANCE Enamel and dentine erosion were significantly reduced by the use of a fluoridated toothpaste or a SnCl2/AmF/NaF mouthrinse, but not by milk or CPP-ACP under the conditions of the present study. CLINICAL TRIALS REGISTRATION NCT01566357
a review
No full textThis review describes various forms of fluoride applications for reducing dental erosive lesions induced by acidic substances. Fluoride admixtures to acidic solutions in a concentration excluding toxicologically side-effects seem unable to arrest erosive lesions. By contrast, topical fluoride applications of toothpastes, oral rinses, gels or varnishes appear to be an effective agent for reducing demineralization by erosion. In particular, high-concentrated fluoride applications are able to increase abrasion resistance and decrease the development of erosions in enamel and dentin
a review
No full textThis review describes various forms of fluoride applications for reducing dental erosive lesions induced by acidic substances. Fluoride admixtures to acidic solutions in a concentration excluding toxicologically side-effects seem unable to arrest erosive lesions. By contrast, topical fluoride applications of toothpastes, oral rinses, gels or varnishes appear to be an effective agent for reducing demineralization by erosion. In particular, high-concentrated fluoride applications are able to increase abrasion resistance and decrease the development of erosions in enamel and dentin
Successful use of a single-retainer all-ceramic resin-bonded fixed partial denture for replacement of a maxillary canine: A clinical report
No full textThis clinical report describes the prosthodontic treatment of a 60-year-old woman to close an edentulous space in the region of the maxillary canine. Single-retainer resin-bonded fixed partial dentures (FPD) have shown satisfactory results in different studies. Recent in vivo studies have shown excellent results for all-ceramic anterior FPDs after 5 years. In the present situation, a cantilevered all-ceramic FPD chosen to replace a missing maxillary canine showed success at the 2.5-year follow-up. Special attention was given to functional and minimal restorative considerations. The use of single-retainer all-ceramic FPDs is discussed. The present case does not represent a routine and well-documented approach for the replacement of a missing maxillary canine. Rather, it is a rarity that was successful because of space availability, present occlusal scheme, and patient cooperation. Implant-supported restorations always should be considered as the first treatment option in such a clinical situation
Efficacy and tolerability of two home bleaching systems having different peroxide delivery
No full textThe aim of this study was to investigate tooth whitening efficacy and oral side effects during bleaching with Whitestrips (R) (WS) (6% hydrogen peroxide H2O2 gel) and Vivadent Vivastyle (R) (VS) (10% carbamide peroxide gel). Forty-seven subjects were included in this single blind, randomized, parallel group study. Application of WS was performed twice a day for 30 min. Trays filled with VS were worn for 60 min once a day. Tooth color was evaluated by measuring L a b values before the study and after completion of the bleaching. Treatment tolerability was monitored throughout bleaching with an 8-week follow-up after completion of therapy. After 2 weeks both treatment groups demonstrated significant improvements in tooth color compared to baseline. A shift toward less yellow (-Delta b) and brighter (+Delta L) tooth color was observed. Delta b amounted to -1.69 +/- 0.38 for WS and -1.20 +/- 0.34 for VS (mean value +/- SE). Delta L was +1.55 +/- 0.41 for WS and +1.20 +/- 0.37 for VS. There was no significant difference between the two systems. No significant differences between the two bleaching systems were recorded for clinically observed signs or reported symptoms. Gingival irritation was observed in 13%, reported tooth hypersensitivities in 22% and reported gum irritation in 20% of the total study population. At an 8-week follow-up visit no adverse effects were observed. Both WS and VS demonstrated significant and comparable levels of tooth color improvement after 2 weeks. Each treatment caused similar levels of transient oral side effects
Influence of a desensitizing agent on efficacy of a paint-on bleaching agent
No full textPurpose: To evaluate the influence of a desensitizing agent (VivaSens) on efficacy of a paint-on bleaching agent (VivaStyle Paint On Plus). Methods: Bleaching was performed for 7 days with VivaStyle Paint On Plus. The varnish was applied twice a day for 10 minutes each. 80 subjects were included in the study and randomly distributed in two groups (n=40) according to exposed cervical dentin and perceived hypersensitivities. Group A used VivaStyle without VivaSens while Group B used VivaStyle Paint On Plus after a single application of VivaSens. Tooth color was assessed on facial surfaces of first upper incisors with Vita shade guide at baseline and 10 days after bleaching therapy. Sensitivity, with intensity graded from 0 (no sensitivity) to 10 (high sensitivity), was assessed chair-side using a blow of air at baseline, at the end of therapy (7 days) and 10 days after bleaching therapy. Statistical evaluation was performed with non parametric ANOVA. Results: Thirteen subjects dropped out of the study; six due to gingival burning sensation (A: 3; B: 3) related to the bleaching regimen and seven due to lack of compliance. Directly after completion of bleaching therapy, tooth color had changed significantly compared to baseline in both treatment groups without difference among the groups. Color changes (A) according to Vita shade guide were as follows (mean standard deviation): Group A: Delta 2.7 +/- 1.0, Group B: Delta 2.8 +/- 0.9. After bleaching (7 days) the intensity of tooth hypersensitivity (mean standard deviation) was increased significantly compared to baseline in both groups (P<0.05): Group A: 1.58 +/- 1.91 (baseline: 0.4 +/- 0.5); Group B: 1.3 +/- 1.8 (baseline: 0.5 +/- 0.7). The number of subjects reporting tooth hypersensitivity increased in Group A by 5 (n=13) and in Group B by I (n=10) subject. Although degree of hypersensitivities and number of subjects with hypersensitivities were lower in Group B, there was no significant difference between the groups
Is titanium tetrafluoride (TiF4) effective to prevent carious and erosive lesions? A review of the literature
No full textThe present review summarises the effects of titanium tetrafluoride (TiF(4)) on the development and progression of carious and erosive lesions. The mode of action of TiF(4) is due to the formation of an acid-stable surface layer, which provides mechanical protection to the surface, and to an increased fluoride uptake, which might chemically reduce demineralisation of dental hard tissues. Most in vitro studies showed that TiF(4) is effective in reducing the formation of carious and erosive enamel and dentine lesions. Thereby, TiF(4) was equally or more effective than sodium fluoride (NaF), amine fluoride (AmF) or stannous fluoride (SnF(2)). While clinical data confirm the caries-preventive effect, clinical trials analysing the anti-erosive effect of TiF(4) are lacking. Few data available from in situ studies revealed conflicting results by showing either no effect or a beneficial effect of TiF(4) on enamel erosion. Even though research focused on TiF(4), there is also evidence to show that other metal fluorides, such as zirconium and hafnium tetrafluorides, affect enamel and dentine demineralisation
In vitro evaluation of different remineralization periods in improving the resistance of previously eroded bovine dentine against tooth-brushing abrasion
No full textOne dentine specimen was prepared from each of 90 bovine incisors. The samples were then evenly distributed among nine groups (A-I) and submitted to 10 alternating de- and re-mineralization cycles, including abrasion by tooth brushing. Each cycle started with a demineralization using the erosive soft drink Sprite Light (R) for 1 min, followed by storing the samples in pooled human saliva for a total of 240 min. The specimens were removed from the saliva at different intervals (group A, 0 min; B, 15 min; C, 30 min; D, 45 min; E, 60 min; F, 90 min; G, 120 min) and brushed in an automatic brushing machine. Groups H (erosion, but no brushing) and I (no erosion, but brushing), which were also stored in saliva for 240 min, served as controls. After these cvcles, loss of dentine was determined by profilometry. producing the following values (mean +/- S.D.), which were analysed statistically (P less than or equal to 0.05): group A (5.03 +/- 1.49 mum), B (4.44 +/- 1.09 mum), C (4.91 +/- 0.95 mum), D (5.47 +/- 1.52 mum), E (5.29 +/- 1.45 mum), F (4.76 +/- 0.74 mum), G (5.16 +/- 0.71 mum), H (2.61 +/- 1.31), I (1.11 +/- 0.39). Groups A-G had no significant differences, but they showed a significantly greater loss of dentine than groups H and I. It is concluded that the abrasion resistance of eroded bovine dentine is still decreased after a remineralization period of 120 min. (C) 2001 Elsevier Science Ltd. All rights reserved
Toothbrushing before or after an acidic challenge to minimize tooth wear? An in situ ex vivo study
No full textPurpose: To evaluate whether patients should be advised to perform toothbrushing before or after an acidic challenge to minimize enamel and dentin wear by brushing abrasion. Methods: The study was a two-period crossover design (A and B, each 14 days) in which three enamel and dentin specimens were fixed in intraoral appliances of 10 volunteers. The following regimens were performed three times a day with at least 4 hours in between: A: 20-second brushing treatment in an automatic brushing machine, 5 minutes intraoral exposure of the specimens, extraoral erosion of enamel and dentin specimens for 40 seconds or 13: Extraoral erosion for 40 seconds, 5 minutes intraoral exposure of the specimens, 20-second brushing treatment in an automatic brushing machine. Enamel and dentin loss at the end of each 14-day regimen was assessed by profilometry and statistically analyzed by t-test. Results: For all volunteers, mean enamel and dentin wear was significantly lower when brushing treatment was performed before erosion (A: enamel: 2.3 +/- 1.0 mu m, dentin: 4.1 +/- 1.6 mu m) than when brushing was applied after erosion (13: enamel: 6.4 +/- 3.0 mu m, dentin: 15.3 +/- 6.8 mu m). It was concluded that patients awaiting an erosive attack should perform toothbrushing prior to rather than after an acidic challenge to minimize enamel and dentin wear
Successful use of a single-retainer all-ceramic resin-bonded fixed partial denture for replacement of a maxillary canine: A clinical report
No full textThis clinical report describes the prosthodontic treatment of a 60-year-old woman to close an edentulous space in the region of the maxillary canine. Single-retainer resin-bonded fixed partial dentures (FPD) have shown satisfactory results in different studies. Recent in vivo studies have shown excellent results for all-ceramic anterior FPDs after 5 years. In the present situation, a cantilevered all-ceramic FPD chosen to replace a missing maxillary canine showed success at the 2.5-year follow-up. Special attention was given to functional and minimal restorative considerations. The use of single-retainer all-ceramic FPDs is discussed. The present case does not represent a routine and well-documented approach for the replacement of a missing maxillary canine. Rather, it is a rarity that was successful because of space availability, present occlusal scheme, and patient cooperation. Implant-supported restorations always should be considered as the first treatment option in such a clinical situation
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