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INTRODUCTION. Dental plaque left undisturbed over teeth is implicated in dental caries development, and, in the presence of frequent exposure to sucrose, white spots are clinically detected after 14-21 days7,22. Using sensitive laboratory methods to assess enamel demineralization it was demonstrated that even shorter periods were enough to cause enamel alterations2,16. However, the relationship between salivary factors, period of dental plaque accumulation, and dental caries deserves further research.. It has been assumed that plaque cariogenicity is influenced by a dynamic interaction of dietary and salivary, microbiological and biochemical factors. Salivary flow rate, buffer capacity and mutans streptococci counts were significantly related to caries occurrence in some studies9,19, and the evaluation of these factors has been proposed as a tool for caries risk assessment; but the associations with caries are normally weak. Also, mutans streptococci counts in plaque are considered to be ...
There is little information in the literature on the relationship among the frequency of carbohydrate consumption, the use of fluoride toothpaste, and enamel demineralization. The aim of this investigation was to compare the extent of demineralization of enamel slabs in situ, with a sugar-based solu …
This is Part 2 of an in vitro study investigating two techniques for recording and quantifying demineralization surrounding orthodontic brackets. In Part 1 the repeatability of computerized image analysis from digitally converted photographic slides and quantitative light‐induced fluorescence (QLF) was explored. In Part 2 of the investigation the validity of each technique was examined.. Thirty halved human molars, shaped to look like incisors and with an orthodontic bracket bonded to the buccal surface were used. A small area of each of the four edges of the bracket was variously exposed to a demineralizing gel for 0, 3, 7, or 14 days. Images of the teeth were taken and analysed using the two techniques. Repeat images and analysis were carried out blind. The sensitivity, specificity, positive, and negative predictive values were calculated.. A negative result confirmed that there was no demineralization present in the majority of cases. A positive result was less reliable particularly for the ...
Enamel demineralization is a concern in orthodontic patients with poor oral hygiene. To curtail this problem, amorphous calcium phosphate (ACP) containing adhesives have been developed. The purpose of this in vitro study was to evaluate the cariostatic potential of an ACP containing orthodontic bonding agent adjacent to brackets. Sixty human molars were randomly distributed into: ACP adhesive, resin modified glass ionomer cement (RMGIC), and conventional composite resin groups (N=20 each). Brackets were bonded following the manufacturers instructions. Tooth enamel through a 2mm window around the brackets was cycled in demineralization (6 hrs) and remineralization (18 hrs) solutions. After 14 days, teeth embedded in resin and were sectioned. Knoop indentations were performed to determine enamel hardness. There were no statistically significant differences between the control and experimental groups. However, both Fuji Ortho LC (RMGIC), and Aegis Ortho (ACP) showed a trend toward a reduction in
Demineralisation of whey by a combination of nanofiltration and anion-exchange treatment: a preliminary studyDemineralisation of whey by a combination of nanofiltration and anion-exchange treatment: a preliminary study ...
Cavity formation / Tooth demineralization explained. | What role do bacteria, dental plaque, sugar and acid play? | How to use this info to prevent decay.
The presence of agent CPP-ACP on dentine surfaces provoked lower demineralization and higher remineralization in comparison with the dentine surfaces without agent.
A demineralized bone matrix is produced by a process in which a bone body is placed in a first processing solution comprising an acid to demineralize the bone body. The bone body is periodically removed from the first solution at specific time intervals to perform at least one test, such as a compression test, on a mechanical property of the bone body. When the test yields a desired result, the bone body is exposed to a second processing solution that is less acidic than the first, thus minimizing the exposure of the bone body to the harsh acidic conditions of the demineralization phase of the process.
Shrimp industries produce waste in the form of the tail, head, and skin. These materials can be further processed into chitin by demineralization and deproteinization. By removing the acetyl group of chitin, chitosan was obtained. Both characteristics of products are influenced by degree of deacetylation, solubility, viscosity, and molecular weight. To obtain high quality of chitosan, the quality of chitin is improved by optimizing demineralization and deproteinization. In this research, before demineralization and deproteinization the boiling process was conducted. In addition, the sequence of those processes was randomized, such as demineralization-deproteinization and deproteinization-demineralization. The study was conducted by treating the dried shrimp shell waste through the boiling process, the process deproteinasi using NaOH solution, demineralization using HCl solution, and followed by deacetylation process using NaOH solution. The entire processes were carried out in a series of ...
The present invention relates to a method for the demineralization of water using a combination of a monodisperse cation filter operated as a lift bed and a monodisperse anion filter operated in the cocurrent flow procedure, and also devices which comprise such a lift bed in combination with at least one cocurrent flow filter and if appropriate a trickling degasser and/or a mixed-bed filter.
In the present study, several Galla Chinensis extracts with different main ingredients were obtained and determined by liquid chromatography-mass spectrometry (LC-MS) analysis. The antibacterial capacity was determined using the polymicrobial biofilms model, which can generate reproducible plaque-like biofilms that occur in vivo. The effect of inhibiting tooth demineralization was tested using an in vitro pH-cycling regime, which mimicked the periodic pH change in mouth ...
The reason for reddish shade after bleaching with peroxide is the high content of manganese, Mn (2+)→colourless but Mn (7+ )→ violet. The contents of Fe, Mn, Ca and Mg varies depending upon the origin of cotton . With the demineralization treatment the mineral content of cellulosic substrates can be reduced substantially and thereby diminishing the negative influence of earth alkali and heavy metal ions in subsequent process operation. Complexion of earth alkali salts (Ca and Mg) is possible in the acid medium and heavy metals (Fe and Mn) is possible in alkaline medium. The advantages and benefits of the demineralisation are : better levelness and more brilliance in the dyeing process, lower peroxide consumption, reduction in the ash content, increase in degree of whiteness, regular decomposition of peroxide, no catalytic damage of the fibres (holes) and possibility of replacement of hypochlorite bleach. Generally good pre-treated materials should have 100-300 p.p.m, of Ca and Mg and 4-8 ...
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Scientists from a wide variety of disciplines were brought together in this group in the hope that useful exchanges of ideas would in the long-term help in our understanding of the problem of...
This invention relates to methods of treating early enamel lesions comprising applying an effective amount of a basic amino acid in free or salt form, together with fluoride to a patient in need thereof.
Sapphire Professional Whitening allows you to achieve dramatic results quickly. When used with the Sapphire Supreme Light1, the system is proven to whiten smiles up to 7 shades in only 30 minutes. Sapphire Professional Whitening also allows you the flexibility to whitene smiles without light activation. Beyond beautifying smiles, you can also protect them from demineralization and caries, thanks to the integrated fluoride.. The Sapphire Supreme light, does not expose your patients to harmful UV rays and thus does not require protective sunscreen or face masks.. Sapphire Home Whitening 3 Minutes per day is all it takes!. Other systems require 30 minutes a day, while Sapphire Home Whitening is proven to whiten smiles up to 9 shades with only 3 minutes of wear a day for two weeks - thats a total treatment time of only 42 minutes!. ...
This column focuses on optimal health created by a good pH balance- between the acid and alkaline in the body. Acid has a detrimental effect on the body as it can cause enzymatic disturbances and demineralization, as well as have an aggressive effect on organic tissues. The author touches on the various physical problems / complaints caused by acidification, especially stress and its effect on the brain.
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The salivary protein, statherin, plays an important role in enamel homeostasis. It forms a bioactive complex with calcium and phosphate releasing these ions when pH decreases. Statherin also forms part of the enamel pellicle forming a protective barrier against bacterial and dietary acids. The purpose of this thesis was two-fold: firstly, to study the effect of a 21 amino acid peptide identical to the N terminus of Statherin (StN21) on enamel de - and remineralisation in vitro and secondly, to undertake biocompatibility assays of this peptide to demonstrate its safety for use in a clinical trial. X-ray microtomography (XMT) is a quantitative, non-destructive method of measuring mineral change. Using XMT to quantify mineral changes, StN21 demonstrated a statistically significant decrease in demineralisation rate when compared to control lesions exposed to phosphate buffered saline (PBS). Whole Statherin protein and sodium fluoride solutions were used as positive controls and were found to have ...
TY - JOUR. T1 - Evaluation of fluorescence imaging with reflectance enhancement technology for early caries detection. AU - Amaechi, Bennett T.. AU - Ramalingam, Karthikeyan. PY - 2014/4. Y1 - 2014/4. N2 - Purpose: A technology based on fluorescence imaging with reflectance enhancement (FIRE) was validated for early detection of caries. Methods: In Phase-I, caries-like lesions were created in a defined window on 85 teeth by 14-day demineralization in acidified gel. During demineralization, teeth were examined for caries every 6 hours for 24 hours, and thereafter daily by visual examination (VE), FIRE, Quantitative light-induced Fluorescence (QLF), and DIAGNOdent pen (DDp). Five teeth were withdrawn after each examination. A tooth slice was cut from each window and examined under polarizing-light microscopy (PLM) for lesion presence/absence and lesion depth quantification. In Phase-II, 56 teeth assembled on mouth models were examined twice by two dentists for caries using the four methods. Each ...
TY - JOUR. T1 - In vitro model for evaluating the effect of child formula toothpastes on artificial caries in primary dentition enamel. AU - Thaveesangpanich, Puckpring. AU - Itthagarun, Anut. AU - King, Nigel M.. AU - Wefel, James S.. AU - Tay, Franklin R.. PY - 2005/6/1. Y1 - 2005/6/1. N2 - Purpose: To determine if the in vitro 10-day pH-cycling model used for permanent teeth could be utilized to evaluate de/remineralization effects, on the enamel of primary teeth, of child formula toothpastes. Methods: Sound extracted primary anterior teeth were coated with nail varnish, leaving a 1 mm-wide window prior to being placed in a demineralizing solution to produce artificial carious lesions in enamel. The teeth were subsequently cut longitudinally into 100 μm thick sections. The 72 specimens were randomly assigned to six groups. In Set 1 contained the specimens in Group a, which were treated with a pea-sized (0.32 g) quantity of non-fluoride toothpaste (First Teeth), and Groups b and c which were ...
Seoul, Republic of Korea - Today at the 94th General Session & Exhibition of the International Association for Dental Research, researcher Angus Walls, Edinburgh Dental Institute, Scotland, UK, will give a Keynote Address titled "What is the Role of Diet in Caries Prevention?" The IADR General Session is being held in conjunction with the 3rd Meeting of the IADR Asia Pacific Region and the 35th Annual Meeting of the IADR Korean Division.. Dental caries are caused by bacterial fermentation of dietary sugars that result in the production of acids just below the critical pH for demineralization of enamel and dentine. This process is dynamic because saliva is an efficient remineralizing solution that can repair acid-mediated demineralization. However, there are limits to the extent of demineralization that can be repaired by the action of saliva, and this ability is impaired in people with xerostomia. Strategies for caries prevention can have two approaches, prevention of demineralization and ...
Aim: Dental tissues such as enamel, dentinoenamel junction (DEJ), dentin, and root dentin can react differently to demineralization and remineralization. The aim of this study was to evaluate the remineralization ability of sodium fluoride on the microhardness of enamel, dentin, and dentinoenamel junction. Materials and Methods: Ten extracted third molar teeth were sectioned mesiodistally to form control and test groups. For the test group, initial demineralization was done with acetic acid for 24 h followed by remineralization for 28 days by application of sodium fluoride (226 ppm) for 2 min twice a day. Vickers microhardness test was done to control and test groups at different sites after initial demineralization and on the 3rd, 5th, 7th, 14th, and 28th day of remineralization. Statistical Analysis Used: Data were analyzed with one-way analysis of variance and post hoc test with a significance level of P , 0.001 with SPSS (21) software. Results: Microhardness values in the demineralization ...
Methods:The surface of hydroxyapatite (HAP) discs were modified with a self-assembling film of fatty acids (FAs), CH3(CH2)n-1COOH in ethanol, with different carbon chain lengths (n = 1, 2, ... , 16) for 12 hrs to obtain superhydrophobicity. The water contact angle on the surface of the modified HAP discs was measured to determine the superhydrophobicity. The superhydrophobically modified HAP discs were coated with human saliva, incubated in a S. mutans suspension for 24 hrs and the amount of the bacterium bound to the HAP disc surface was measured as colony-forming units. The HAP discs modified with FAs with different carbon chain length were also examined for their resistance to acid by immersing in an artificial caries demineralisation solution for 12 hrs. The calcium dissolved in the demineralisation solution was measured by atomic absorption spectroscopy. Further, the resistance of superhydrophobically modified HAP discs to acid was examined by the same method at 1, 8, 24 and 48 hrs ...
How to Apply Toothpaste on Pimples. If youre struggling with a breakout, you might feel embarrassed or frustrated. Whether youve tried other pimple remedies without success or youre looking for a quick solution you can try at home,...
Tooth enamel is the hardest substance in the human body. Its like the castle walls, protecting the softer dentin and pulp inside each tooth. Unfortunately, it is porous and vulnerable to erosion by acids. When the enamel loses minerals to acid exposure (a process called demineralization), it weakens the teeth and leaves them more susceptible to decay. However, we can fortify that enamel by getting enough minerals and nutrients, remineralizing our teeth. This is the battle our mouths are fighting every day: demineralization versus remineralization. The invaders in this battle are bacteria. They feed on sugar and carbs left in our mouths after a meal, and they excrete enamel-eroding acid onto our teeth. Luckily, we have a natural defense against the bacteria, and thats our saliva. If enamel is like castle walls, then saliva is like the moat. A lot of harmful bacteria falls into this moat and gets washed away instead of being able to attack the castle walls. To learn more about what harmful ...
Dental caries, also known as tooth decay or a cavity, is an infection, usually bacterial in origin, that causes demineralization of the hard tissues (enamel, dentin, and cementum ) and destruction of the organic matter of the tooth, usually by production of acid by hydrolysis of the food debris accumulated on the tooth surface. If demineralization exceeds saliva and other remineralization factors such as from calcium and fluoridated toothpastes, these tissues progressively break down, producing dental caries (cavities, holes in the teeth). The two bacteria most commonly responsible for dental cavities are Streptococcus mutans and Lactobacillus. If left untreated, the disease can lead to pain, tooth loss, and infection. Today, caries remain one of the most common diseases throughout the world.. Caries can be classified by location, etiology, rate of progression, and affected hard tissues. These forms of classification can be used to characterize a particular case of tooth decay in order to more ...
There are numerous well documented medical studies that show the deleterious affect of soft drinks on dental enamel. Non-cola beverages fared worst and dental problems were greatly accelerated by both regular and dietetic drinks, though the absence of sugar lessened decay. Recently sports drinks have been added to the studies with the surprising finding that they result in enamel deterioration equal to or worse than the non-cola beverages! Several different mechanisms are at work but the main problem is that almost all of these products contain phosphoric or citric acid. Other organic acids such as malic and tartaric are often present as well. These acids are very erosive to dental enamel due to their ability to chelate calcium. They are efficient buffers and keep oral pH well below the optimal salivary pH of 6.5 to 7.5. The threshold level for the development of dental caries is below Ph 5.5. Enamel demineralization occurs with prolonged exposure to lower pH or frequent cycling between optimal ...
Dental caries is a biofilm-mediated, sugar-driven, multifactorial, dynamic disease that results in the phasic demineralization and re-mineralization of dental hard tissue..
Acquisition of the ability to make polysaccharides from sucrose, we. and anthropological elements. In humans, oral caries is thought as the demineralisation of tooth with the bacterial creation of organic acidity from fermentable substrates such as for example monosaccharides, oligosaccharides, and prepared polysaccharides1,2,3. The oral caries pandemic continues to be previously talked about from an anthropological and archaeological viewpoints in terms of the consumption WZ8040 of fermentable carbohydrates4,5,6,7. Indeed, the emergence of dental caries positively correlates with the increased consumption of carbohydrates through the main source, grain8,9, following the introduction of prehistoric farming. At that time, the degree of caries was comparatively moderate, since oral bacteria produced only low amounts of organic acid. However, the widespread use of processed sugar during the industrial revolution due to improvements in food processing techniques, stabilisation of plantation-based ...
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I would stop worrying about it so much. Many toothpastes contain some ingredient that makes your mouth tingle -- maybe its the mint. You may have had some kind of allergic reaction. Wash your skin thoroughly.If you notice the pain continues under your arm for more than a couple days that seems more of concern. Try to relax -- youre not going to get cancer from rubbing toothpaste on your breasts one time!Drink fluids and get a little mild exercise. If the pain continues ask a doctor.Just curious, how big did your breasts get? Was it noticeable? How long did the sweBy the way, dont feel embarrassed about this. I put toothpaste on my... uh.... penis.... once as an experiment. The tingling sensation was too much and I had to wash it off quickly.Some toothpastes seem to do it, others dont ...
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... on | On a daily basis, your teeth experience a loss and gain of vital minerals that keep them healthy and strong (known as demineralization and…
Dental caries is one of the most prevalent diseases worldwide. It is a result of hard tissue demineralization largely caused by acid produced by bacteria on the tooth surfaces as a by-product of metabolism of fermentable carbohydrate.
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Resumo O presente estudo avaliou o efeito dos vernizes de NaF e CPP-ACP/NaF na redu o da eros o promovida por refrigerante e associada a um medicamento l quido pedi trico. Os esp cimes de esmalte foram pr -tratados com verniz fluoretado, de acordo com o grupo de aloca o: verniz NaF (Duraphat ) ou verniz CPP-ACP NaF (verniz MITM). Dois tipos distintos de desafio erosivo foram realizados: eros o com refrigerante (ER) ou eros o com medicamento l quido pedi trico e refrigerante (MLP/ER). Esp cies de esmalte bovino foram aleatorizados em seis grupos (n=10): G1 = NaF + ER; G2 = CPP-ACP/NaF + ER; G3 = gua destilada e deionizada (DD) + ER; G4 = NaF + MLP/ER; G5 = CPP-ACP/NaF + MLP/ER e G6 = DD gua + MLP/ER. Antes dos tratamentos, a superf cie das amostras foi dividida em duas reas (n o exposta-NE e rea exposta-AE). Os esp cimes foram avaliados pela t cnica de perfilometria 3D de n o-contato para determinar a perda de estrutura dent ria (PED) e a rugosidade superficial (RS). A microscopia eletr nica de ...
This is a strong antibacterial chemical which obviously has some recovery residential or commercial properties. However, not all toothpaste has this active ingredient, and not every person reacts similarly to it. An additional element is that some individuals have dry skin and this can cause troubles especially if you leave the toothpaste on too lengthy as it could truly dry the skin which is something you do not want as this could cause irritation and redness, which is the opposite outcome you are trying to find! Something else to consider is that toothpaste was never created to cure or alleviate acne.. Now that does not indicate you must not use it, but it is something to consider due to the fact that we are discussing a delicate problem right here, that of dealing with acne, and some individuals may belittle the suggestion of using toothpaste to treat it, whereas others will certainly say that they have actually been utilizing it for many years and has actually functioned fine for them. At ...
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TY - JOUR. T1 - Arterial stiffness and bone demineralization. T2 - The Baltimore longitudinal study of aging. AU - Giallauria, Francesco. AU - Ling, Shari M.. AU - Schreiber, Catherine. AU - Maggio, Marcello. AU - Shetty, Veena. AU - Muller, Denis. AU - Vigorito, Carlo. AU - Ferrucci, Luigi. AU - Najjar, Samer S.. PY - 2011/9/1. Y1 - 2011/9/1. N2 - BACKGROUND: Arterial stiffening is one of the hallmarks of vascular aging, and is an important risk factor for cardiovascular morbidity and mortality. Aging is also associated with bone demineralization. Accumulating evidence indicate that arterial stiffness and bone demineralization might share common pathways. The aims of this study were to evaluate whether the association between arterial stiffness and bone demineralization is independent of age, and to explore putative mechanisms that may mediate their relationship. METHODS: A cross-sectional analysis was performed using data from 321 men (68 ± 12 years) and 312 women (65 ± 13 years) of the ...
DISCUSSION. This in situ study was designed to evaluate the effects of microleakage, surface roughness and biofilm control on the occurrence of caries next to composite resin restoration. Bovine teeth were used as source of enamel slabs. More preventive approach in dentistry and ethical concerns have limited the availability of human teeth for research protocols. Bovine teeth have been proven to be a suitable substitute of human teeth for demineralization studies1. The findings demonstrated that the presence of microleakage at the adhesive interface did not affect significantly the enamel demineralization, reinforcing the lack of association between microleakage and caries adjacent to restoration4,11,15,19. Microleakage is still considered an etiologic factor for secondary caries6 , but most of these studies were performed in vitro7. In this study, we only evaluated the superficial lesions formed around restorations. There was no evaluation concerning the wall lesions formed at the ...
Glass ionomer cements (GICs) are used by oral health professionals on exposed root surfaces to protect against demineralisation and tooth sensitivity. Researchers in the Oral Health CRC sought to develop an improved functional GIC capable of remineralising surrounding areas of tooth enamel. The commercial outcome of this research is Fuji VII-EP (Extra Protection) - a novel glass ionomer cement enhanced with 3% CPP-ACP (RecaldentTM) now manufactured and distributed by GC Corporation. Studies in the Oral Health CRC have found that Fuji VII-EP releases calcium, phosphate and fluoride ions into the tooth and increases protection against demineralisation. Further studies in the Oral Health CRC are exploring the antibacterial benefits of Fuji VII-EP.. Fuji VII-EP is available to dental professionals in the USA and New Zealand. It is distributed by GC Corporation. More information.. ...
Materials and Methods: Twenty-four freshly extracted human third molars were collected and stored in distilled water with 0.1% thymol solution at room temperature prior to the experiments. The enamel specimens were treated with one coat of theobromine at two concentrations (100 mg/l or 200 mg/l in distilled water) for 5 min. Enamel surfaces in the control group received no theobromine. They were then kept in distilled water for 1 week and subjected to SEM analysis. The specimens were demineralised by storing them in acidic hydroxyethylcellulose for three days. After baseline microhardness measurements, they were incubated either in 100 or 200 mg/l theobromine for 5 min. The control group was kept in distilled water. After washing the specimens under distilled water, they were kept in a remineralising solution for 18 h. Microhardness of the enamel surface was initially determined for each specimen before artificial demineralisation. After demineralisation, the experimental groups were incubated ...
Stains can affect the outside of the tooth and the inside. White spots are surface stains affecting the enamel, and they can occur on an otherwise healthy tooth. These spots are most commonly caused by fluorosis and demineralization.. Fluorosis occurs when the adult teeth are exposed to too much fluoride while still developing beneath the gums. This doesnt damage the teeth, it just unevenly bleaches them. The best way to avoid fluorosis is to make sure your child doesnt use too much toothpaste before their adult teeth start coming in. Just a pea-sized dab is enough for a young child, and no more than a smear the size of a grain of rice should be used for babies and toddlers.. Demineralization is far more harmful than fluorosis, as it involves the leaching of minerals out of the enamel through exposure to acids. This happens when plaque isnt cleaned away effectively. Good brushing habits and regular dental cleanings are crucial for preventing this problem. Demineralization is a particular risk ...
Enamel demineralization is frequently encountered in dental practice. Histologically, hypomineralization is the common feature and several etiologies stand behind their clinical appearance. Recently, resin infiltration technique was introduced to mask these enamel lesions.
A person experiencing caries may not be aware of the disease.[11] The earliest sign of a new carious lesion is the appearance of a chalky white spot on the surface of the tooth, indicating an area of demineralization of enamel. This is referred to as a white spot lesion, an incipient carious lesion or a "microcavity".[12] As the lesion continues to demineralize, it can turn brown but will eventually turn into a cavitation ("cavity"). Before the cavity forms, the process is reversible, but once a cavity forms, the lost tooth structure cannot be regenerated. A lesion that appears dark brown and shiny suggests dental caries were once present but the demineralization process has stopped, leaving a stain. Active decay is lighter in color and dull in appearance ...
A person experiencing caries may not be aware of the disease.[11] The earliest sign of a new carious lesion is the appearance of a chalky white spot on the surface of the tooth, indicating an area of demineralization of enamel. This is referred to as a white spot lesion, an incipient carious lesion or a "microcavity".[12] As the lesion continues to demineralize, it can turn brown but will eventually turn into a cavitation ("cavity"). Before the cavity forms, the process is reversible, but once a cavity forms, the lost tooth structure cannot be regenerated. A lesion that appears dark brown and shiny suggests dental caries were once present but the demineralization process has stopped, leaving a stain. Active decay is lighter in color and dull in appearance ...