scholarly journals Comparison of Resin Infiltration Technique with Conventional Preventive Applications on Occlusal Fissures: EDS and SEM Analyses

2020 ◽  
Vol 54 (4) ◽  
pp. 382-391
Author(s):  
Sidika Aynur Horuztepe ◽  
Esra Ergin ◽  
Alev Onen ◽  
Sevil Gürgan
Keyword(s):  
Control Group ◽  
Chemical Compositions ◽  
Fissure Sealant ◽  
Resin Infiltration ◽  
Occlusal Surfaces ◽  
Ph Cycling ◽  
Infiltration Technique ◽  
Oral Conditions ◽  
Topical Fluoride ◽  
Mineral Loss

Objective: To compare the subsurface mineral loss preventing capability of resin infiltration technique with topical fluoride and fissure sealant applications to demineralized occlusal fissures under simulated oral conditions. Materials and Methods: Occlusal surfaces of 64 extracted intact human third molars were demineralized. Next, the teeth were classified into four groups according to preventive applications (n = 16): G1, Specimens used as the control group with no preventive treatment; G2, Topical fluoride application (APF Gel/ DEEPAK); G3, Fissure sealant application (ClinproTMSealant/ 3M ESPE); and G4, Resin infiltration technique (Icon/ DMG). Chemical compositions before pH cycling were evaluated for eight specimens from each group. The remaining eight teeth from each group were subjected to pH cycling for 15 days to simulate the oral conditions. Subsequently, the specimens were fractured after immersion in liquid nitrogen and the subsurface fluoride (F), calcium (Ca), phosphorus (P) levels, and Ca/P ratio of each specimen were measured using energy dispersive x-ray spectrometer (EDS). The data were subjected to statistical analysis (p = 0.05). The effects of preventive applications to surface topography of specimens were evaluated using scanning electron microscope (SEM). Results: There were no significant differences among the groups in subsurface F, Ca, and P levels and Ca/P ratios before or after pH cycling (p > 0.05). All three preventive applications were effective during pH cycling according to SEM observations. Conclusions: The subsurface mineral loss preventing capability of resin infiltration technique applied to occlusal fissures was comparable to topical fluoride and fissure sealant applications. Clinical significance: The resin infiltration technique could represent a valid alternative to traditionally used both preventive and restorative treatments for treating initial carious lesions on occlusal fissures, offering the advantages of better resin penetration and retention.

Evaluation of fissure sealant applied to topical fluoride treated teeth

2005 ◽  
Vol 29 (3) ◽  
pp. 215-219 ◽  
Author(s):  
Azza El-Housseiny ◽  
Aly Sharaf
Keyword(s):  
Test Group ◽  
Acid Etching ◽  
Control Group ◽  
Fissure Sealant ◽  
Fluoride Treatment ◽  
Permanent Molars ◽  
And Control ◽  
Topical Fluoride ◽  
Sealant Retention

Fissure sealant is an important tool in the prevention of dental caries. This study evaluated the effect of treating the enamel with topical fluoride gel prior to acid etching on sealant retention clinically (Part I) and in vitro (Part II). In part I a split mouth design using contralateral first permanent molars was conducted. Seventy (35 pairs) molars were sealed. Fissure sealant was applied on one side of the mouth (control group) and the contralateral tooth received acidulated phosphate fluoride gel (test group) prior to acid etching. The sealant was evaluated after 6 and 12 months and scored as intact, partially lost or completely missing. In part II, the shear bond strength between sealant and buccal enamel of extracted permanent molars without or with topical fluoride treatment was evaluated. Results showed no statistically significant differences between the test and control groups either clinically or in vitro. It is concluded that topical fluoride application prior to acid etching does not have a deleterious effect on sealant retention. However, further investigations should be conducted using different types of fluoride before altering the traditional practices.

scholarly journals Effectiveness of S-PRG Filler-Containing Toothpaste in Inhibiting Demineralization of Human Tooth Surface

2018 ◽  
Vol 12 (1) ◽  
pp. 811-819 ◽  
Author(s):  
Bennett T. Amaechi ◽  
Hariyali Kasundra ◽  
Deepika Joshi ◽  
Azadeh Abdollahi ◽  
Parveez A. A. Azees ◽  
...  
Keyword(s):  
Human Tooth ◽  
Tooth Surface ◽  
Control Group ◽  
Tooth Demineralization ◽  
Caries Model ◽  
Ph Cycling ◽  
Early Caries ◽  
Pairwise Contrasts ◽  
Caries Lesions ◽  
Mineral Loss

Objectives: Using an established pH-cycling caries model, the authors evaluated the effectiveness of toothpastes containing Surface Pre-reacted Glass-ionomer filler (S-PRG) in preventing tooth surface demineralization. Materials and Methods: 210 tooth blocks were randomly assigned to seven experimental groups (30 blocks/group): no treatment (A), and toothpaste containing either NaF (B), 0 wt% S-PRG (C), 1 wt% S-PRG (D), 5 wt% S-PRG (E), 20 wt% S-PRG (F) or 30 wt% S-PRG (G). Groups were subjected to 14-day demineralization for development of early caries lesions using a pH-cycling caries model. Demineralization was assessed using Quantitative Light-induced Fluorescence (QLF) and Transverse Microradiography (TMR). All pairwise contrasts (between treatments) were tested using Analysis of Variance (ANOVA), and then Tukey’s HSD for multiple comparisons. All p-values are considered significant if <0.05. Results: With QLF, there was a significant (ANOVA; p<0.001) difference in mean percent fluorescence loss (∆F) observed among the groups. Relative to control, all S-PRG-containing toothpastes significantly (Tukey’s; p<0.0001) inhibited demineralization at varying percentages (48.6%, 61.3%, 67.4% and 69.8% reduction with S-PRG 1%, 5%, 20% and 30% respectively). Demineralization reduction was not significant with either NaF (15.6% reduction) or 0% S-PRG (-2.5% reduction i.e. 2.5% more demineralization than the Control) when compared to control group. Mineral loss assessed using TMR followed a similar trend as fluorescence loss. Conclusion: Toothpaste containing S-PRG filler can serve as an effective caries control tool. S-PRG filler-containing dentifrice to be more effective in preventing tooth demineralization than 1100 ppm fluoride provided as sodium fluoride.

scholarly journals Effect of Strontium-Doped Bioactive Glass on Preventing Formation of Demineralized Lesion

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4645
Author(s):  
Lin-Lu Dai ◽  
May-Lei Mei ◽  
Chun-Hung Chu ◽  
Irene Shuping Zhao ◽  
Edward Chin-Man Lo
Keyword(s):  
Bioactive Glass ◽  
Human Tooth ◽  
Control Group ◽  
X Ray Diffraction ◽  
Study Materials ◽  
Group 4 ◽  
Ph Cycling ◽  
The Mean ◽  
Group 2 ◽  
Mineral Loss

This study investigated the effect of strontium-doped bioactive glass (SBAG) on the formation of dental demineralized lesions. Materials and methods: The study materials were 48 sound human tooth specimens with both dentine and enamel, divided equally into four groups: Group 1 (SBAG), Group 2 (SBAG+Fluoride), Group 3 (Fluoride), and Group 4 (Water as control). After 14 days of pH cycling, the surface morphology of the specimens was observed by scanning electron microscopy. Crystal characteristics of the precipitates were assessed by X-ray diffraction (XRD). Micro-CT was used to measure the mineral loss and the depths of the demineralized lesions formed. Results: Exposure of collagen in inter-tubular areas in dentine was seen in the control group (Group 4) but not in Groups 1 to 3. In Group 2, there were obvious granular particles on the surface of the dentine. XRD revealed precipitation of apatites on the surface of the tooth specimens in Groups 1 to 3. The mean lesion depths in dentine were 81.80 μm, 30.68 μm, 39.04 μm, and 146.36 μm in Groups 1 to 4, respectively (p < 0.001). Lesions in enamel were only found in the control group. The mean mineral loss values in the dentine lesions were 1.25 g/cm3, 0.88 g/cm3, 0.87 g/cm3, and 1.65 g/cm3, in Groups 1 to 4, respectively (p < 0.001). Conclusion: Strontium-doped bioactive glass has a preventive effect on the formation of demineralized lesions in enamel and dentine.

scholarly journals Is It Possible to induce Artificial Caries-affected Dentin using the Same Protocol to Primary and Permanent Teeth?

2015 ◽  
Vol 16 (8) ◽  
pp. 638-642
Author(s):  
Tathiane Larissa Lenzi ◽  
Fabio Zovico Maxnuck Soares ◽  
Tamara Kerber Tedesco ◽  
Rachel de Oliveira Rocha
Keyword(s):  
Repeated Measures ◽  
Permanent Teeth ◽  
Control Group ◽  
Dentin Caries ◽  
Ph Cycling ◽  
Knoop Microhardness ◽  
Caries Lesions ◽  
Experimental Group ◽  
Mineral Loss

ABSTRACT Aim This in vitro study compared the mineral loss of natural and artificially-created caries-affected dentin in primary and permanent teeth using the same protocol to induce caries lesions. Materials and methods Twenty molars presenting natural occlusal dentin caries lesions (10 primary–PriC and 10 permanent– PermC; control group), and 20 sound molars (10 primary – PripH and 10 permanent–PermpH; experimental group), were selected. Occlusal cavities were prepared in teeth of the experimental group that were submitted to pH-cycling for 14 days to simulate caries-affected dentin. All specimens were longitudinally sectioned and prepared in order to obtain Knoop microhardness values from 15 to 250 ìm depth, starting in bottom of center of natural lesions or cavities. The microhardness (KHN) data were submitted to three-way repeated measures analysis of variance (ANOVA) and Tukey's tests (α = 0.05). Results Considering all depths, there was no statistically significant differences (p > 0.05) between the mineral loss of the control (PriC = 30.9 ± 6.4 and PermC = 40.8 ± 8.6) and experimental (PripH = 27.3 ± 11.1 and PermpH = 35.5 ± 14.0) groups, neither between primary and permanent teeth. Conclusion The mineral loss of the artificially-created cariesaffected dentin is similar to that from naturally developed dentin caries lesions. Clinical significance The pH-cycling model may be a suitable method to simulate caries-affected dentin in both permanent and primary teeth. How to cite this article Lenzi TL, Soares FZM, Tedesco TK, de Oliveira Rocha R. Is It Possible to induce Artificial Caries-affected Dentin using the Same Protocol to Primary and Permanent Teeth? J Contemp Dent Pract 2015;16(8):638-642.

scholarly journals Chemical compositions, antimicrobial effects, and cytotoxicity of Asia minor wormwood (Artemisia splendens Willd.) growing in Iran

BMC Chemistry ◽  
2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Fariba Heshmati Afshar ◽  
Masumeh Zadehkamand ◽  
Zahra Rezaei ◽  
Abbas Delazar ◽  
Vahideh Tarhriz ◽  
...  
Keyword(s):  
Cell Line ◽  
Proliferative Activity ◽  
Methanolic Extract ◽  
Biologically Active ◽  
Flavonoid Glycosides ◽  
Control Group ◽  
Chemical Compositions ◽  
Preparative Hplc ◽  
Cytotoxicity Activity ◽  
Methanolic Extracts

Abstract Background Artemisia splendens from the Asteraceae family is a new source of biologically active compounds. The current study investigated to evaluate antimicrobial and cytotoxicity activity of methanolic extracts and their fractions obtained from aerial parts by agar disk diffusion and MTT methods, respectively. The active fractions were subjected to preparative HPLC for isolating the pure compounds, which were structurally elucidated, by 1H and 13C NMR. Results The results showed that the methanolic extract and its 60% SPE fraction have the anti-proliferative activity on A549 cell line in comparison with the control group. Meanwhile, the methanolic extract and its 40% SPE fraction can inhibit the growth of Gram-positive strains as anti-microbial activity. The 60% SPE fraction also illustrated anti-proliferative activity on the HT-29 cell line compared to the control group. Chromatographic separations via preparative HPLC yielded 5 flavonoids and three flavonoid glycosides. Conclusion Based on the results it can be concluded that A. splendens as a potential source of cytotoxic and antimicrobial compounds can be used in pharmaceutics.

scholarly journals Teaching Minimally Invasive Interventions in Paediatric Dentistry: A Cross-Sectional Survey of Dental Schools in Iran

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
S. Moradi ◽  
S. Sabbagh ◽  
L. Timms ◽  
V. Ravaghi
Keyword(s):  
Dental Caries ◽  
Minimally Invasive ◽  
Public Health Problem ◽  
Paediatric Dentistry ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Fissure Sealant ◽  
Resin Infiltration ◽  
Dental Schools ◽  
Hall Technique

Abstract Background Dental caries is a significant public health problem in Iran. Teaching  minimally invasive interventions in paediatric dentistry may facilitate the provision of treatment for untreated dental caries in children. We evaluated the teaching of such interventions in both undergraduate dental curriculum and Paediatric Dentistry Specialty Training Programme (PDSTP) in Iran. Methods This was a cross-sectional questionnaire-based survey. Participants in this study were the directors of 40 undergraduate programmes and 15 PDSTPs in all Iranian dental schools (response rate = 100%). Descriptive statistics were reported. Results The most commonly taught methods were preventive fissure sealant and preventive resin restoration (PRR), which were taught ‘both didactically and clinically’ in all undergraduate dental programmes. The least commonly taught methods were silver diamine fluoride (SDF), the Hall technique and resin infiltration, which were taught ‘both didactically and clinically’ in less than 5% of dental schools. The same three methods were the least commonly approaches taught in PDSTP, further, they were less often perceived to be ‘essential’. Conclusions There was a notable variation in the teaching of the management of dental caries in Iran’s dental education. Some minimally invasive approaches including SDF, the Hall technique and resin infiltration are not being commonly taught in Iranian dental schools despite the evidence base for these techniques.

scholarly journals Evaluation of oral conditions in patients with neurodegenerative diseases treated in geriatric centers

2016 ◽  
Vol 64 (1) ◽  
pp. 17-23
Author(s):  
Bruna Marjorie Dias FROTA ◽  
Sarah Nascimento HOLANDA ◽  
Fabrício Bitú SOUSA ◽  
Ana Paula Negreiros Nunes ALVES
Keyword(s):  
Elderly Patients ◽  
Neurodegenerative Diseases ◽  
Oral Pathology ◽  
Control Group ◽  
Oral Manifestations ◽  
Denture Stomatitis ◽  
Exact Test ◽  
Clinical Conditions ◽  
Oral Conditions ◽  
And Control

ABSTRACT Objective: To compare the general clinical conditions and oral alterations, and also evaluate the prosthesis, in subjects diagnosed with Alzheimer's disease (AD) or Parkinson's disease (PD), attended at two geriatric centers in the city of Fortaleza - Ceará. Methods: 70 patients were analyzed (between 57 to 91 years) with AD and PD, through evaluation of neurological medical records and oral clinical examination. Variables as sex, age, race, comorbidities, oral manifestations and prosthetic conditions were observed. A total of 20 elderly patients without neurological disease consisted the control group (CG). Fisher's exact test and Kruskal-Wallis were used as statistical analysis. Results: In both groups, blood hypertension was the most frequent comorbidity. As for the oral examination in the group with AD, it was observed that 54.2% had periodontal disease, 34.2% caries. Similar results were found in PD patients (31.4%; 22.8% - respectively). However, no difference was observed between the groups, as the systemic and oral manifestations in both geriatric centers (p> 0.05). Was identified more than half of the subjects (57.7%) using dentures, and 86.5% of these had become maladaptive, with some kind of defect. There was statistical difference in the presence of associated oral pathology, denture stomatitis, between dementia and control group (p = 0.0213). Conclusion: Elderly patients with AD and PD have poor oral health, as well as those without neurodegenerative diseases. However, have more defects and disorders associated with the use of removable dentures.

scholarly journals Effect of saliva contamination and re-etching time on the shear bond strength of a pit and fissure sealant

2004 ◽  
Vol 12 (3) ◽  
pp. 200-204 ◽  
Author(s):  
Gisele Maria Correr ◽  
Angela S. Caldo-Teixeira ◽  
Roberta Caroline Bruschi Alonso ◽  
Regina Maria Puppin-Rontani ◽  
Mário Alexandre Coelho Sinhoreti ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Etching Time ◽  
Control Group ◽  
Distilled Water ◽  
Third Molars ◽  
Fissure Sealant ◽  
Significant Difference ◽  
Pit And Fissure Sealant ◽  
Saliva Contamination

The aim of this study was to evaluate the effect of saliva contamination (SCT) and re-etching time (RET) on the shear bond strength (SBS) of the Fluroshield sealant. Forty-five extracted third molars were sectioned and flattened until reach an enamel surface area. Then, all samples were etched for 30 sec with 35% phosphoric acid and then they were distributed into 9 groups (n=10) according to SCT and RET (seconds), respectively: G1- control (no SCT and no RET); G2- 30s and 0s; G3- 60s and 0s; G4-30s and 2s; G5- 30s and 5s; G6- 30s and 15s; G7-60s and 2s; G8- 60s and 5s; G9- 60s and 15s. The sealant was applied according to the manufacturer's instructions. The samples were stored in distilled water at 37ºC for 72h and subjected to the SBS test. The results indicated that there was no statistically significant difference between the groups (p>0.05). However, it could be noticed that: 1- the longer the SCT, the lower the SBS values; 2 - the longer the RET, the higher the SBS values. It could be concluded that there was a tendency to the shortest SCT (30s) associated to the longest RET (5 and 15s) to reach similar SBS values for the control group.

scholarly journals Evaluation of Antibacterial Effects of Fissure Sealants Containing Chitosan Nanoparticles

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Sedighe Sadat Hashemi kamangar ◽  
Houtan Zareian ◽  
Abbas Bahador ◽  
Maryam Pourhajibagher ◽  
Zahra Bashareh ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Effect ◽  
Bacterial Species ◽  
Chitosan Nanoparticles ◽  
Control Group ◽  
Fissure Sealants ◽  
Biofilm Inhibition ◽  
Biofilm Growth ◽  
Fissure Sealant ◽  
Significant Difference

Objectives. The present study evaluated the antimicrobial effects of fissure sealants containing chitosan nanoparticles. Materials and Methods. Antibacterial effect of Master Dent fissure sealant alone and after incorporating chitosan nanoparticles was evaluated on Streptococcus mutans, sanguis, and Lactobacillus acidophilus. Biofilm growth was evaluated by determining colony counts. Antimicrobial effect was determined on days 3, 15, and 30 by counting microbial colonies using eluted components test. One-way ANOVA, Tukey HSD tests, t test, and two-way ANOVA were used for statistical analyses (α = 0.05). Results. Biofilm inhibition test showed that fissure sealant containing 1 wt.% chitosan decreased colony counts significantly ( P < 0.05 ). Eluted components test with S. mutans and sanguis showed significant decrease in colony counts during the first 15 days in chitosan containing group; however, from day 30, antimicrobial activity decreased noticeably, with no significant difference from control group ( P > 0.05 ). Antimicrobial activity against L. acidophilus was maintained in chitosan group up to 30 days, and decrease in colony counts was significant ( P < 0.05 ). Conclusion. According to the results of this study, incorporation of 1 wt.% chitosan into fissure sealant induced an antimicrobial activity. Antibacterial effect on L. acidophilus persisted for longer time (30 days) compared to the two other bacterial species (15 days).

scholarly journals ANALYSIS OF THE DYNAMICS OF FUNCTIONAL OCCLUSION INDICATORS IN THE CONSTRUCTION OF OCCLUSION SURFACES OF ORTHOPEDIC STRUCTURES

2020 ◽  
Vol 73 (12) ◽  
pp. 2651-2656
Author(s):  
Svitlana P. Yarova ◽  
Sergii O. Turchenenko ◽  
Iryna M. Tkachenko ◽  
Yuriy Yu. Yarov
Keyword(s):  
Functional Condition ◽  
Masticatory Muscles ◽  
Main Group ◽  
Suggested Method ◽  
Control Group ◽  
Orthopedic Treatment ◽  
Functional Parameters ◽  
Occlusal Surfaces ◽  
Left And Right ◽  
And Control

The aim: Is to evaluate the effectiveness of the proposed method of constructing occlusal surfaces of orthopedic structures by monitoring the dynamics of functional indicators of occlusion and the functional condition of the masticatory muscles. Materials and methods: The object of the study was made up by 64 patients with included defects of the dentition of the 3rd class according to Kennedy. Patients were divided into two equal groups – the main group (patients were treated by using the suggested method of construction of occlusal surfaces of orthopedic structures) and control (dentition defects were replaced according to the traditional protocol). Results: The results of evaluating the effectiveness of the proposed method showed that the index of symmetry of the anterior bundles of the temporal muscles dropped by 18.5%, the index of symmetry of the masticatory muscles reduced by 22%, the torque of the mandible reduced by 32%, the index of stabilizing occlusal – by 27%, relative efforts of balance disturbance for more than 10 % regarding the left and right reduced by a factor of 4.4, the rate of opening time was 1.5 times higher than before, the rate of time of opening of the jaws – 1.8 times. Conclusions: The use of the suggested method of orthopedic treatment with temporary structures leads to probable changes in the studied functional parameters in comparison with the control group (p <0,05).

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