Effects of energy and sports drinks on tooth structures and restorative materials

Effect of Low pH Dietary Supplements on Discoloration of Resin Composites

AIM

This study aimed to evaluate the impact of the consumption of low pH dietary supplements on the color stability of different resin composites.

MATERIALS AND METHODS

Three different restorative materials were used for this in vitro study: Filtek One Bulk-Fill (FOB), Filtek Z550 (Z550), and Fill-Up (FUP). Samples fabricated from each composite group were divided into four subgroups, and color measurements were performed at baseline. The control subgroup was stored in distilled water, and the other three subgroups were immersed in acidic dietary supplement solutions (Redoxon, Supradyn, and Voonka Collagen Shake) for 2 minutes daily for 28 days. Color measurements were obtained using a digital spectrophotometer. Color change values (ΔE1) were calculated after each color measurement. Next, all samples were immersed in a coffee solution for 7 days and repeat color measurements were taken to determine ΔE2 values. The study groups were compared using the Kruskal-Wallis test (α =0.05).

RESULTS

ΔE1 values were significantly different among the groups (P < 0.05). While Voonka Collagen Shake produced the greatest discoloration in FOB (1.67 ± 1.08) and Filtek Z550 (3.59 ± 1.90) materials, Fill-Up showed the highest discoloration (3.14 ± 0.37) with Supradyn. Analysis of ΔE2 values demonstrated a significant difference only for the Filtek Z550-Redoxon group versus the control group (P < 0.05).

CONCLUSION

Acidic dietary supplements not only produce color alterations in resin composites but also reduce the staining resistance of the composite further, depending on the type of composite and dietary supplement. Consumption of staining food after taking Redoxon effervescent tablets produces greater discoloration in Filtek Z550 restorations compared with other restorative materials.

Effects of Smokeless Tobacco on Color Stability and Surface Roughness of 3D-Printed, CAD/CAM-Milled, and Conventional Denture Base Materials: An In Vitro Study

Tobacco consumption in its different forms can affect the optical and surface properties of dental materials that are used in the oral cavity. Thus, the present study was conducted to evaluate the effects of two commercially available smokeless tobacco products on the color stability and surface roughness of denture base resins that were fabricated using three different techniques (CAD/CAM milling, 3D printing, and conventional heat polymerization). A total of 126 denture base resin specimens were fabricated using the three different manufacturing techniques (n = 42 each). Specimens from each group were further subdivided into three subgroups (n = 14 each) and immersed in three different immersion media (a khaini suspension, a tabbaq suspension, and artificial saliva). The differences in color and surface roughness were assessed according to data that were collected and statistically analyzed using SPSS version 24.0. The tabbaq smokeless tobacco was found to cause greatest changes in color and surface roughness; the effect was observed to be highest in the 3D-printed specimens followed by the conventional heat-polymerized and CAD/CAM milled specimens. The mean changes in color and surface roughness were the highest for the tabbaq smokeless tobacco followed by the khaini smokeless tobacco and the artificial saliva. Statistically significant (p-value < 0.05) differences were observed among all techniques and suspensions. We concluded that the mean changes in color and surface roughness were significantly higher for the 3D-printed dentures compared to the conventional heat-polymerized and CAD/CAM-milled dentures. Thus, the results of the present study strengthened the concept that tobacco in any form can lead to changes in the color and surface roughness of denture base materials.

Erosive Effect of Acidic Beverages and Dietary Preservatives on Extracted Human Teeth—An In Vitro Analysis

Objectives Frequent consumption of acidic beverages and dietary preservatives in younger generation, diet-conscious (celebrities), and obese individuals have a rapid impact on demineralization of the teeth. An attempt was made to analyze the erosive potential of various acidic beverages.

Materials and Methods One hundred and ninety extracted human permanent teeth were sectioned longitudinally, pre-weighed, randomly grouped, and placed in nine acidic beverages (200 mL) with predetermined pH, i.e., three commercially available fruit juices, three carbonated drinks, and three dietary preservatives.

Statistical Analysis The sectioned specimens (n = 10) were analyzed at time intervals of 12, 24, 48, and 96 days. Mean weight loss was calculated, and surface changes were assessed under a stereomicroscope. The demineralization pattern and microscopic changes were observed under a compound and polarizing microscope. One-way analysis of variance test followed by Tukey's post-hoc analysis was employed.

Results Overall the maximum demineralizing effect was caused by vinegar and apple cider. In the fruit juices category, lemon juice induced significant changes, while in the carbonated drinks category Coca-Cola induced the maximum changes and in the category of food preservatives vinegar induced the maximum changes. Severe discoloration was seen with respect to Coca-Cola followed by Mountain Dew (carbonated drink).

Conclusion The present study is unique as three different types of microscopes have been employed and both dentin and enamel of permanent teeth have been analyzed. In addition, the effect of dietary preservatives on hard tissues was evaluated. Oral health educators can reinforce important practices such as decreasing the frequency of consumption and time duration of beverage contact with the teeth. Also, the use of mouth rinses and buffering agents after the consumption of dietary beverages can be advocated along with regular fluoride application for those who are regular consumers.

Color stability of bioactive restorative materials after immersion in various media

Objectives:

The aim of this article is to assess the color stability of the bioactive restorative materials (Activa Bioactive, Beautifil II) compared with the conventional resin composite and resin-modified glass ionomer cement after immersion in different staining solutions overtime.

Materials and Methods:

This is an in-vitro study that investigated four different material groups: (1) bioactive composite (ACTIVA Bioactive-Restorative, Pulpdent, USA), (2) Giomer composite (Beautifil II, SHOFU Dental GmbH, Japan), (3) resin-modified glass ionomer cement (Fuji II, GC Corporation, Japan), and (4) resin composite (Filtek Z350XT, 3M ESPE, USA). One hundred samples (n=25 each group) were fabricated using a custom acrylic mold (1 mm thick × 10 mm diameter) and then immersed in five different staining solution groups: coffee, black tea, cola, mixed berry juice, and saline. Baseline (T0) shade of samples was recorded using two spectrophotometers: VITA Easyshade Digital Advance and a spectrophotometer. Then shade was recorded at the intervals of 7 (T1), 14 (T2), and 28 (T3) days of immersion. Measurements were obtained and then ΔE was calculated for each group at each time point. Three-way analysis of variance tests were used to test the interactions between different variables at the 0.05 significance level.

Results:

All specimens showed a significant color change (P<0.001), following 7, 14, and 28 days of storage. Activa Bioactive and Filtek Z350 showed the highest color stability overtime in different staining solutions, whereas Fuji II and Beautifil II showed the least color stability. The most significant color change was noticed in the coffee group and then in the mixed berry juice group.

Conclusion:

Resin-based restorative materials showed higher color stability than glass ionomer-based restorations. Both spectrophotometers gave comparable results for materials’ color stability.

Color stability of 3D-printed denture resins: effect of aging, mechanical brushing and immersion in staining medium

PURPOSE

This in-vitro study evaluated and compared the color stability of 3D-printed and conventional heat-polymerized acrylic resins following aging, mechanical brushing, and immersion in staining medium.

MATERIALS AND METHODS

Forty disc-shaped specimens (10 mm in diameter and 3 mm thick) were prepared from two 3D-printed [DentaBASE (DB) and Denture 3D+ (D3D)] and one conventional polymethylmethacrylate (PMMA) denture materials. The specimens were thermo-cycled, subjected to mechanical brushing, and were immersed in either coffee, lemon juice, coke, or artificial saliva (AS) to simulate one and two years of oral use. Color measurements of the specimens were recorded by a spectrophotometer at baseline (T0), and after one (T1) and two years (T2) of simulation. The color changes (∆E) were determined and also quantified according to the National Bureau of Standards (NBS) units. Descriptive statistics, followed by factorial ANOVA and Bonferroni post-hoc test (α=.05), were applied for data analysis.

RESULTS

The independent factors, namely material, staining medium, and immersion time, and interaction among these factors significantly influenced ∆E (P<.009). Irrespective of the materials, treatments, and time, the highest and the lowest mean ∆Es were observed for PMMA in lemon juice (4.58 ± 1.30) and DB in AS (0.41 ± 0.18), respectively. Regarding the material type, PMMA demonstrated the highest mean ∆E (2.31 ± 1.37), followed by D3D (1.67 ± 0.66), and DB (0.85 ± 0.52), and the difference in ∆E between the materials were statistically significant (P<.001). All the specimens demonstrated a decreased color changes at T2 compared to T1, and this difference in mean ∆E was statistically significant (P<.001).

CONCLUSION

The color changes of 3D-printed denture resins were low compared to conventional heat polymerized PMMA. All the tested materials, irrespective of the staining medium used, demonstrated a significant decrease in ∆E values over time.

Nitrate-rich beetroot juice offsets salivary acidity following carbohydrate ingestion before and after endurance exercise in healthy male runners

There have been recent calls for strategies to improve oral health in athletes. High carbohydrate diets, exercise induced dehydration and transient perturbations to immune function combine to increase oral disease risk in this group. We tested whether a single dose of nitrate (NO₃^-) would offset the reduction in salivary pH following carbohydrate ingestion before and after an exercise bout designed to cause mild dehydration. Eleven trained male runners (V˙O2max 53 ± 9 ml∙kg^-1∙min^-1, age 30 ± 7 years) completed a randomised placebo-controlled study comprising four experimental trials. Participants ingested the following fluids one hour before each trial: (a) 140 ml of water (negative-control), (b) 140 ml of water (positive-control), (c) 140 ml of NO₃^- rich beetroot juice (~12.4 mmol NO₃^-) (NO₃^- trial) or (d) 140 ml NO₃^- depleted beetroot juice (placebo-trial). During the negative-control trial, participants ingested 795 ml of water in three equal aliquots: before, during, and after 90 min of submaximal running. In the other trials they received 795 ml of carbohydrate supplements in the same fashion. Venous blood was collected before and after the exercise bout and saliva was sampled before and repeatedly over the 20 min following carbohydrate or water ingestion. As expected, nitrite (NO₂^-) and NO₃^- were higher in plasma and saliva during the NO₃^- trial than all other trials (all P<0.001). Compared to the negative-control, salivary-pH was significantly reduced following the ingestion of carbohydrate in the positive-control and placebo trials (both P <0.05). Salivary-pH was similar between the negative-control and NO₃^- trials before and after exercise despite ingestion of carbohydrate in the NO₃^- trial (both P≥0.221). Ingesting NO₃^- attenuates the expected reduction in salivary-pH following carbohydrate supplements and exercise-induced dehydration. NO₃^- should be considered by athletes as a novel nutritional strategy to reduce the risk of developing acidity related oral health conditions.

Associations between self-reported physical activity and oral health: a cross-sectional analysis in 17,777 Spanish adults

Background The aim of this study was to assess the association between levels of physical activity and oral health in adults residing in Spain.Methods Cross-sectional data from the Spanish National Health Survey 2017 were analysed (n = 17,777 adults aged ≥15 years; 52.0% females). The International Physical Activity Questionnaire (IPAQ) short form was used to measure physical activity. Oral health was self-reported through eight variables. Covariates included were sex, age, marital status, education, obesity, smoking and alcohol consumption.Results Dental caries (19.8% vs 27.8%), dental extraction (72.7% vs 75.4%), gingival bleeding (15.5% vs 19.1%), tooth movement (4.3% vs 5.9%) and missing tooth (57.9% vs 62.5%) were statistically significantly less frequent in the sufficient than insufficient physical activity group, whereas dental filling (74.2% vs 70.9%), dental material (36.6% vs 34.8%) and no missing tooth and no material (28.2% vs 25.1%) were statistically significantly more common. After adjustment, there was a negative relationship between physical activity and dental caries (OR = 0.72; 95%CI = 0.66-0.78), gingival bleeding (OR = 0.79; 95%CI = 0.72-0.86), tooth movement (OR = 0.83; 95%CI = 0.71-0.96) and missing tooth (OR = 0.91; 95%CI = 0.85-0.98). In contrast, physical activity was positively associated with dental material (OR = 1.16; 95%CI = 1.07-1.25).Conclusions Participation in physical activity is favourably associated with some but not all self-reported oral health correlates.

Use of medicines associated with dry mouth and dental visits in an Australian cohort

BACKGROUND

Poor recognition of medicine-induced dry mouth can have a number of adverse effects, including difficulties with speech, chewing and swallowing dry foods, gum disease, dental caries and oral candidosis. This study examined the prevalence of use of medicines that cause dry mouth and claims for dental services funded by the Department of Veterans' Affairs (DVA) in an Australian cohort.

METHODS

We used the DVA administrative health claims data to identify persons using medicines that can cause dry mouth at 1st of September 2016 and determine their DVA dental claims in the subsequent year. Results were stratified by gender, residence in community or residential aged cared facility and number of medicines.

RESULTS

We identified 50 679 persons using medicines known to cause dry mouth. Of these, 72.6% were taking only one medicine that may cause dry mouth, and 21.6% were taking two. Less than half (46.2%) of all people taking at least one of these medicines had a dental claim in the following year. A smaller proportion of women (35.9%) made claims than men (56.9%), χ²  = 2248.77, P < 0.0001.

CONCLUSIONS

Targeted interventions raising awareness of the relationship between some medicines and dry mouth, and the importance of dental visits are warranted.

Avaliação do manchamento e da rugosidade superficial de materiais restauradores diretos após diferentes sistemas de polimento: estudo in vitro

Resumo Introdução Com o avanço estético e tecnológico dos compósitos restauradores diretos, a procura pela Odontologia Éstética tem aumentado. Objetivo Avaliar o manchamento e a rugosidade superficial dos compósitos Filtek Z350 (3M ESPE) e Filtek Bulk Fill (3M ESPE), polidos por diferentes sistemas: Disco SofLex e Disco SofLex diamantado espiral (ambos da 3M ESPE), após exposição repetitiva ao café. Material e método Neste estudo in vitro, um total de 80 discos de resina foi confeccionado, com 40 espécimes para cada compósito avaliado. Os espécimes foram ainda subdivididos em grupos (n=10) de acordo com o método de polimento ‒ SofLex e SofLex diamantado ‒ e a solução de armazenamento ‒ água deionizada (controle) e café (experimental). Após 24 horas de armazenamento em água deionizada, foi realizada a avaliação de cor e rugosidade inicial, bem como a execução dos protocolos de polimento testados. Posteriormente, os espécimes foram expostos ao processo de manchamento em café e água deionizada durante 42 dias. Após esse período, a cor e a rugosidade foram reavaliadas. Resultado A análise estatística paramétrica evidenciou que o manchamento superficial foi influenciado significativamente pelos fatores compósito e solução, mas não pelo fator polidor ou ainda por qualquer interação entre os fatores. Para o fator compósito, Filtek Z350 exibiu maior manchamento, e para o fator solução, foi observado maior manchamento para o café. Já na análise de rugosidade, não houve diferenças significativas. Conclusão Independentemente do sistema de polimento, a solução experimental de café alterou a cor de ambos os compósitos avaliados e verificou-se que a rugosidade não foi alterada.

Avaliação do efeito cromático em resinas compostas nanoparticuladas submetidas a solução café

Resumo Introdução Em uma sociedade de alta competitividade social, os padrões estéticos estão cada vez mais refinados e, dentro destes, a concepção e o desejo de se ter o sorriso perfeito aumentaram consideravelmente a busca pelos tratamentos dentários e, consequentemente, o desenvolvimento de materiais que possam propiciar tais resultados. O sucesso clínico de uma restauração engloba sua longevidade, do ponto de vista funcional, incluindo ausência de infiltrações, e sua função estética, por meio da manutenção de coloração e lisura superficial adequada. Objetivo O presente trabalho busca analisar a alteração de cor de duas marcas de compósitos odontológicos nanoparticulados ‒ Z350 e Bulk Fill (3M ESPE) ‒ e dois sistemas de polimento ‒ Disco SofLex e Disco SofLex espiral emborrachado (3M ESPE) ‒, com as subdivisões em grupos controle (água destilada) e experimental (café), em um período de 21 dias. Material e método Os espécimes foram confeccionados de modo padronizado e armazenados por sete dias em água deionizada a 37 °C, em estufa para análise da cor inicial, seguido do armazenamento nas respectivas soluções para a análise cromática, ao final do período de estudo, sendo ambas as análises realizadas através de espectrofotômetro (CM-700d, Konica Minolta, Osaka, Japão) e escala ΔE CIELAB. Resultado Observou-se que ambas as resinas tiveram sua coloração alterada na presença do café, entretanto a resina Z350 apresentou maiores variações em comparação à Bulk Fill. Conclusão Apesar de a solução corante café ser capaz de promover mudança de cor nas resinas estudadas, os sistemas de polimento, isoladamente, não apresentam efeito final sobre a alteração cromática desses materiais restauradores.