| 单词 | dentin |
| 例句 | He also argued that the dentin of Tyrannosaur teeth was more significant than the enamel. Imagine T. Rex. Now Imagine It With Lips. 2023-03-30T04:00:00Z In the root of each tooth, the dentin is covered by an even harder bone-like layer called cementum. Anatomy and Physiology 2013-06-19T00:00:00Z At the heart of the dentin is the tooth’s soft pulp, where nerve cells and cells called odontoblasts, which manufacture dentin, are intertwined. The Mysterious Molecular Culprit Behind Cold Tooth Pain 2021-03-26T04:00:00Z They counted fine lines in the dentin, the erstwhile living tissue of the teeth. Cannibalistic Dinosaurs Went Through a Lot of Teeth 2019-12-06T05:00:00Z Its teeth, like ours, are made up of an outer layer of enamel and an inner layer of hard, dense, bony tissue called dentin. Scientists solve the mystery of the dragon with transparent teeth 2019-06-05T04:00:00Z The proteins came from collagen, a component of connective tissue in body parts including dentin, a part of teeth. Denisovans, mysterious extinct humans, conquered high altitudes 2019-05-01T04:00:00Z Although enamel protects the underlying dentin and pulp cavity, it is still nonetheless susceptible to mechanical and chemical erosion, or what is known as tooth decay. Anatomy and Physiology 2013-06-19T00:00:00Z That was a bit of a surprise, as these supporting cells are best known for making and maintaining dentin, not aiding in perception. The Mysterious Molecular Culprit Behind Cold Tooth Pain 2021-03-26T04:00:00Z Hydrogen peroxide in whitening treatments penetrates enamel and dentin, and alters tooth proteins. Whitening Strips Alter Proteins in Teeth 2019-04-09T04:00:00Z The core of a tooth, the pulp, holds the blood vessels and nerve fibers, while the bulk consists of a bone-like material called dentin. How Teeth Became Tusks, and Tusks Became Liabilities 2018-09-11T04:00:00Z A quick bit of tooth anatomy: Enamel is the thin hard outer layer of the tooth; dentin is the next layer in and is less dense than enamel. Here’s what it takes to whiten teeth 2018-04-27T04:00:00Z Figure 23.11 The Structure of the Tooth This longitudinal section through a molar in its alveolar socket shows the relationships between enamel, dentin, and pulp. Anatomy and Physiology 2013-06-19T00:00:00Z Within the protective shell of their enamel, teeth are made of a hard substance called dentin that’s threaded with tiny tunnels. The Mysterious Molecular Culprit Behind Cold Tooth Pain 2021-03-26T04:00:00Z When dentin is seriously injured, stem cells located in the tooth's soft, innermost layer—the dental pulp—morph into cells called odontoblasts, which secrete new tissue. Instead of Filling Cavities, Dentists May Soon Regenerate Teeth 2018-02-01T05:00:00Z The team dated the tooth dentin and enamel, the sediment stuck to the upper jaw, and tools found near the fossil. In Cave in Israel, Scientists Find Jawbone Fossil From Oldest Modern Human Out of Africa 2018-01-25T05:00:00Z Dentists try to avoid applying the concentrated product on or near the dentin. Here’s what it takes to whiten teeth 2018-04-27T04:00:00Z As soon as he popped his slide under a microscope and saw the telltale dentin layers, “I knew we were in business,” Erickson said. Dinosaurs took months to hatch out of their eggs. That may have doomed them. 2017-01-03T05:00:00Z Stannous fluoride fills in exposed dentin, keeping food and drinks from stimulating nerves. Whitener, sensitive teeth, plaque fighter: How to choose a toothpaste 2016-10-28T04:00:00Z Yet when the injury is too large or deep, that fresh dentin is not sufficient to restore the tooth. Instead of Filling Cavities, Dentists May Soon Regenerate Teeth 2018-02-01T05:00:00Z Because acidic drinks such as coffee soften tooth enamel and dentin beneath it, you should wait 30 minutes after drinking coffee to brush your teeth. Savor Your Coffee -- and a Bright Smile 2016-09-09T04:00:00Z The thinner the enamel, the more likely the yellowish dentin shows through. Here’s what it takes to whiten teeth 2018-04-27T04:00:00Z Then they checked their teeth about 12 weeks later with high-resolution X-rays and microscopy and found that there was more dentin. Could your cavity-filled tooth repair itself with stem cells in the future? 2016-07-05T04:00:00Z He said he was initially worried that repeated usage might damage cells within the dentin, the layer just beneath the enamel. Ask Well: Can Whiteners Damage the Teeth? 2015-10-20T04:00:00Z The teeth treated with these drugs produced significantly more dentin than ones untreated or stuffed with an unsoaked sponge or typical dental fillers. Instead of Filling Cavities, Dentists May Soon Regenerate Teeth 2018-02-01T05:00:00Z Ironically, enamel loss exposes the layer of dentin beneath it, making your teeth look dingy rather than pearly. 20 Mistakes You're Making With Your Teeth 2015-10-10T04:00:00Z Bleaching products won’t help in this situation because they don’t affect the dentin. Here’s what it takes to whiten teeth 2018-04-27T04:00:00Z A further complication is that once the dentin is exposed, other coloring agents are more easily absorbed by teeth. The Inevitability of Yellow Teeth 2015-06-22T04:00:00Z Aging is another culprit, as enamel wears down and the yellower dentin that lies beneath becomes visible. Ask Well: Whiter Teeth 2015-03-20T04:00:00Z The researchers drilled holes in the molars of the rodents, zapped the tooth pulp with the laser and put on temporary caps, then watched as dentin formed over a period of 12 weeks. A nice, bright smile: Scientists use lasers to regrow teeth 2014-05-30T04:00:00Z Dental cement is currently used to trigger new dentin formation, but it is not always successful. Laser hope on root canal treatments 2014-05-28T04:00:00Z “Your teeth will be whiter initially, but as the enamel wears away, you’ll see more dentin,” Messina says. Here’s what it takes to whiten teeth 2018-04-27T04:00:00Z These are the gradual thinning of the enamel, the outer coating of the tooth, and the thickening of the layer under that, called the dentin. The Inevitability of Yellow Teeth 2015-06-22T04:00:00Z The laser prompted dental stem cells to form dentin, the hard material that is similar to bone and provides most of a tooth's structure. Low-Power Laser May Trigger Tooth Repair 2014-05-28T04:00:00Z This protein in turn directed stem cells present in tooth pulp to turn into dentin. A nice, bright smile: Scientists use lasers to regrow teeth 2014-05-30T04:00:00Z The source of the new dentin was traced back to stem cells in the dental pulp. Laser hope on root canal treatments 2014-05-28T04:00:00Z These growth factors cue stem cells to generate dentin, the bone-like substance that teeth are mostly made of. Laser Light Coaxes Damaged Rodent Tooth Repair 2014-05-28T04:00:00Z Meanwhile, “the natural laying down of secondary dentin affects the light-transmitting properties of teeth, resulting in a gradual darkening of teeth with age,” the review continues. The Inevitability of Yellow Teeth 2015-06-22T04:00:00Z The researchers said that after three weeks the bundle of cells started to resemble a tooth: "The tooth-like structure contained dental pulp, dentin, enamel space and enamel organ." New teeth grown from urine - study 2013-07-29T23:44:23Z The researchers were able to estimate rates of tooth formation by counting lines of tooth dentin, located below the tooth’s enamel. Observatory: Some Dinosaurs Grew New Sets of Teeth Rapidly 2013-07-22T17:19:34Z It in turn activated growth chemicals that stimulated the stem cells to produce a new layer of dentin. Laser hope on root canal treatments 2014-05-28T04:00:00Z "The bulk of the tooth is dentin, and this dentin is made day by day," D'Emic explained. Huge Plant-Eating Dinosaur Never Ran Out of Teeth 2013-07-18T19:15:03.607Z The yellowing may be more or less obvious, depending on the genetically determined natural color of the dentin and the thickness of the enamel. The Inevitability of Yellow Teeth 2015-06-22T04:00:00Z The scientists found an increase in dentin loss when brushing in the 20 minutes after drinking soda. Really?: Never Brush Your Teeth Immediately After a Meal 2012-05-21T18:31:53Z Decay occurs when bacteria in the mouth break down carbohydrates to produce acid that dissolves the minerals in tooth enamel and dentin. Well Blog: Dental Exam Went Well? Thank Fluoride 2012-01-23T21:57:21Z "The tooth is like a house, the dentin is the inner walls, but it still needs a roof and outside walls." Laser hope on root canal treatments 2014-05-28T04:00:00Z As teeth form, layers of a calcified tissue, called dentin, build up underneath a cap of enamel. Huge Plant-Eating Dinosaur Never Ran Out of Teeth 2013-07-18T19:15:03.607Z The lesion doesn't always lead to a full-blown cavity, which entails decay of the layer right beneath the enamel, called dentin. Are Dentists overtreating your teeth? 2011-11-29T23:22:03Z Acid attacks the teeth, eroding enamel and the layer below it, called dentin. Really?: Never Brush Your Teeth Immediately After a Meal 2012-05-21T18:31:53Z The lesion doesn’t always lead to a full-blown cavity, which entails decay of the layer right beneath the enamel, called dentin. A Closer Look at Teeth May Mean More Fillings by Dentists 2011-11-28T19:46:54Z It was not a perfect match for natural dentin, but the researchers argue it would be easier to achieve with human teeth, which would be larger, and by refining the the laser. Laser hope on root canal treatments 2014-05-28T04:00:00Z This allowed the scientists to carefully study the tiny rings of dentin, which measure about a quarter of the width of a human hair, inside each tooth. Huge Plant-Eating Dinosaur Never Ran Out of Teeth 2013-07-18T19:15:03.607Z Still, it can easily be renewed, or if all the tin is removed we find the dentin hard and firm. Tin Foil and Its Combinations for Filling Teeth “It is concluded that for protection of dentin surfaces,” the authors wrote, “at least 30 minutes should elapse before tooth brushing after an erosive attack.” Really?: Never Brush Your Teeth Immediately After a Meal 2012-05-21T18:31:53Z The effect is to cause the surface exposed to dentin to oxidize more than tin would do alone; in that there is a benefit. Tin Foil and Its Combinations for Filling Teeth The laser beam triggered a series of changes that led to the formation of new dentin, the layer below the enamel, in animal tests. Laser hope on root canal treatments 2014-05-28T04:00:00Z Nature will not restore the lost part, but will do the next best thing—solidify the dentin. Tin Foil and Its Combinations for Filling Teeth The oxygen in the saliva helps to blacken the tin, and the metallic oxid penetrates the dentin more or less, acting as a protection, because it is insoluble. Tin Foil and Its Combinations for Filling Teeth In some cases, under tin, the pulp gradually recedes, and the pulp-cavity is obliterated by secondary dentin. Tin Foil and Its Combinations for Filling Teeth If the cavity is too deep for this, I use Fletcher's artificial dentin as a base, because it partly fills the cavity and the ends of the cylinders stick to it. Tin Foil and Its Combinations for Filling Teeth Coming in contact with the living dentin, it is easily adapted, and does not excite inflammation; it does not interfere with the process going on within the teeth to heal the lesion caused by caries. Tin Foil and Its Combinations for Filling Teeth It was suggested that it would be desirable to have some acid remain in the tin for filling teeth in which there is no sensitive dentin. Tin Foil and Its Combinations for Filling Teeth |
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