Dr. Feisel Haji Using a Zeiss Extaro 300 Electronic Dental Microscope to Replace an Anterior Composite at Soho Dental in Toronto.
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Dr. Feisel Haji Using a Zeiss Extaro 300 Electronic Dental Microscope to Replace an Anterior Composite at Soho Dental in Toronto.
Dentists & Lab Techs in the Toronto area – The Dawson study club is starting another year and we’re welcoming new members! I am truly honoured to lead this great group this year.
Our current members are talented and have spent considerable energy developing some pretty amazing skills. It’s really exhilarating to have an open discussion on how each one of us approaches a case!
I decided to become a study club leader in order to promote a better way to do dentistry and to create a supportive environment. The Dawson Academy has taught me a way to give patients superior treatment in a relaxed, predictable way. I hope you’ll consider joining! You can find out more information by messaging me directly.
Dr. Feisel Haji
Class 2 Restorations using the Zeiss Extaro 300 Dental Microscope at Soho Dental in Toronto, performed by Dr. Feisel Haji.
Researchers trying to figure out what our ancestors ate have discovered that ancient Britons, like us, loved their carbs.
Plaque preserved on the teeth of people dead for centuries can be used to reveal what their favorite foods were, an international team of researchers found. This dental calculus shows a diet heavy on carbohydrates, including oats, peas and cabbage, from the eighth century right up to modern times.
And people from the year 700 through modern times all appear to have depended heavily on milk for their protein.
Archeologist Jessica Hendy of Germany’s Max Planck Institute for the Science of Human History and colleagues are trying to find the best ways to use ancient teeth to figure out what ancient people ate.
Researchers struck it lucky when the frozen, mummified body of a 5,000-year-old man, later named Ötzi, was found in the Alps in 1991. His stomach contents were well preserved by the dry cold — revealing a last meal of goat meat, venison and wheat.
Example of dental calculus analyzed in this study
Jessica Hendy et al. / Proceedings of the Royal Society B
But often, all that is left of people long dead are bones and teeth. Hendy’s team is looking at ways to optimize the study of dental plaque, which, they wrote, “entombs and preserves” molecules of food.
“Traces of foodstuffs can be sourced directly from the human mouth, uniquely revealing precise evidence of particular foods consumed,” they wrote in their report, published Tuesday in the Proceedings of the Royal Society B.
They used a high-tech approach called proteomics, which analyzes specific proteins in a sample, to re-examine the data collected from 38 samples dating back to England’s Iron Age and the Roman occupation of the island. They used a new protein extraction method to analyze samples from the teeth of people who died in the 18th and 19th centuries, as well as people living now or who recently died.
“A total of 100 archaeological samples of dental calculus were analyzed,” they wrote.
One challenge is to separate human proteins from food proteins. The only meat sample they could distinguish was a single incidence of venison. It’s not clear whether that is because meat was rarely eaten, or because it’s too difficult to use current methods to tell animal proteins from the human proteins that would naturally be found in the mouth of a human being.
Hendy’s team found proteins they could identify as coming from oats, peas and plants from the cabbage family in the ancient samples. In modern samples, potatoes, soybeans and peanuts were common.
“Interestingly, we observe that milk proteins are consistently detected throughout all time periods within this study and are detected in 20 percent of individuals overall in ancient and modern individuals,” Hendy’s team wrote.
Northern Europeans commonly carry a genetic mutation that allows them to drink and tolerate milk well into adulthood. Scientists believe that the ability to drink milk gave people a survival advantage.
Understanding what people ate and how diets have changed help paint a clearer picture of long-gone cultures. People can analyze the residue left in ceramic cookware and offerings at gravesites. They can also analyze hair and bones to find chemical signatures of certain classes of food.
But analyzing the hardened plaque on teeth gives a unique picture of what actually went into people’s mouths, Hendy’s team noted
Author: Maggie Fox
Article Originally Appeared at: http://www.nbcnews.com
To fracture a front tooth accidentally can be quite a traumatic experience. Fortunately, repairing a fractured front tooth can often be done with one dental visit. The video illustrates how we can restore a fractured tooth, conservatively with dental bonding
A common question that dentists hear from those who are in the market for a new mouthguard is,
This is a valid question, and the answer depends on what your personal preferences are regarding comfort level, price range, materials, and protection levels. To help clarify which type of mouthguard may be the right one for you, we have laid out everything you need to know about the similarities and differences between custom-fit mouthguards and over-the-counter mouthguards.
Both sports and over-the-counter mouthguards are made of plastic, but while most sports mouthguards are very thick and brittle, over-the-counter mouthguards are created out of a thinner and more pliable plastic that is meant to be more suitable to a wider range of people.Over-the-counter mouthguards are very similar to many mouthguards used by athletes while playing sports except over-the-counter mouthguards are intended to stop teeth from grinding during the night.
Over-the-counter mouthguards come out of their packaging as a smooth, preformed u-shaped tray and cover the entire top row of teeth in order to prevent upper and lower teeth from gnashing and grinding against each other. The mouthguard has to be fitted to your specific teeth before it is comfortable to wear and work effectively.
Generally speaking, the most common over-the-counter mouthguards are formed through a method called “boil and bite”. This means that the mouthguard must be placed in boiling water for a certain amount of time, specified by the instructions included with the mouthguard, in order for the plastic to become very soft and pliable.
After being heated sufficiently, the mouthguard is then taken out of the water and carefully placed in the mouth, over the teeth, and gently bitten down on so that the soft plastic moulds to the shape of the wearer’s teeth. The primary downside to these is that the plastic is thinner, which means that extra precaution should be taken to ensure that when moulding the mouthguard to the teeth, the mouthguard is not bitten through.
After the mouthguard has cooled and is properly formed to your teeth, you can then carefully make any adjustments to the mouthguard with a sharp and sturdy pair of scissors or a razor blade. Over-the-counter mouthguards are meant to be customizable, so if the mouthguard feels too long or is too high and aggravates the gums, it can be modified to suit your comfort level.
When used for either sports or sleeping, the efficacy of over-the-counter mouthguards depends on a few things, such as these:
Protecting your teeth from grinding with an over-the-counter mouthguard is absolutely better than not protecting them at all. However, if your jaw moves enough to move or dislodge the mouthguard during sleep the mouthguard will no longer protect your teeth.
If you clench your teeth extremely hard, you may end up biting through the plastic or breaking the mouthguard which, again, would leave your teeth unprotected. If this sounds like your teeth grinding habits, a custom-fit mouthguard is going to be better suited to your needs.
Because over-the-counter mouthguards are made from a pliable plastic, constant chewing, teeth clenching, and grinding wears down the plastic much quicker than the strong material used to make custom-fit mouthguards.
This means that over the course of a few months, over-the-counter mouthguards can break or become deformed and may no longer provide the same level of protection.
Over-the-counter mouth guards can be purchased at most pharmacies, drugstores, and some online retailers. However, if you are a first time buyer it is best to buy your mouth guard in person and speak with the pharmacy professional to ensure that you are getting the one best for you. Generally speaking, these mouth guards cost from $15 to $35.
Custom-fit mouthguards are prescribed and created by a dental professional from thermoplastic material and are based on a detailed mould taken of your mouth and teeth.
These devices are highly personalized as your dentist can adjust the thickness of the mouthguard depending on your level of teeth grinding and clenching, and they are designed to fit perfectly in your mouth with no adjustments needed. Custom mouthguards can be made for either sports or for nighttime teeth grinding, and are created differently depending on the intended use.
Most mouthguards are generally only fitted for the upper teeth, but can also be fitted for the bottom set of teeth in certain situations. Unlike over-the-counter mouthguards, no two custom mouthguards are the same, and for that reason they provide the most complete protection for your mouth.
The first step your dentist will take when creating your custom-fit mouthguard will be to take an impression of your teeth. This is generally done using a dental putty that forms to all the crevices of each tooth and creates an exact mould of your smile – unlike regular store-bought mouthguards which just form to the general shape of the tooth line.
This mould is then used in the dental office or, more often, is sent to a lab where the actual mouthguard is created. The structure is made by layering superheated plastic to precise specifications, and is then cooled to create an extremely durable piece of dental wear.
Because custom mouth guards are so precisely made, they are able to provide you with optimal safety and comfort. This is something that over-the-counter mouthguards cannot ever achieve.
The level of protection afforded by custom-fitted mouthguards is unrivalled by any other mouthguard, and their durability is enhanced by the snug shape, which hugs each tooth closely, eliminating unwanted movement. For those who violently grind, clench, or gnash their teeth at night, custom-fit mouthguards can be made thicker, alleviating and reducing pressure on the jaw.
Custom-fit mouthguards are very durable and do not lose their shape like store bought mouthguards tend to. The general rule of thumb for custom mouthguards is that every few years they may need replacing, depending on the level of wear and tear, and whether or not there have been any changes in the mouth or to the wearer’s teeth.
Children who are still growing will need their custom mouthguards updated more frequently to accommodate their changing mouths.
However, it is a good idea to bring your custom mouthguard with you to each dental checkup so that your dentist can ensure that it is still fitting properly and is not damaged.
Custom-fit mouthguards can only be obtained through your dentist. If you are eligible for one, your dentist will arrange a time when you can be fitted for a dental mould to begin the process of creating your custom mouthguard.
Because these mouthguards require professional attention and are so specific to each mouth, they can cost anywhere from $100 to $700 depending on what you will be using it for, how much material is needed, and other specifications your mouth may need. Be sure to check with your insurance provider whether or not the expense can be covered or partially covered according to your dental plan.
Whether you are considering an over-the-counter mouthguard or think a custom-fit option might be the best for you, be sure to talk to your dentist about your specific needs. Contact us today if you have more questions about mouthguards
Article originally appeared at https://www.123dentist.com
All of us at Soho Dental wish you and your families a happy holiday season and may the New Year bring with it health, happiness, comfort and peace!
Erosion is the loss of tooth enamel caused by acid attack. Enamel is the hard, protective coating of the tooth, which protects the sensitive dentine underneath. When the enamel is worn away, the dentine underneath is exposed, which may lead to pain and sensitivity.
Erosion usually shows up as hollows in the teeth and a general wearing away of the tooth surface and biting edges. This can expose the dentine underneath, which is a darker, yellower colour than the enamel. Because the dentine is sensitive, your teeth can also be more sensitive to heat and cold, or acidic foods and drinks.
Every time you eat or drink anything acidic, the enamel on your teeth becomes softer for a short while, and loses some of its mineral content. Your saliva will slowly cancel out this acidity in your mouth and get it back to its natural balance. However, if this acid attack happens too often, your mouth does not have a chance to repair itself and tiny bits of enamel can be brushed away. Over time, you start to lose the surface of your teeth.
Bulimia is a condition where patients make themselves sick so that they lose weight. Because there are high levels of acid in the vomit, this can cause damage to tooth enamel.
Acids produced by the stomach can come up into the mouth (this is called gastro-oesophageal reflux). People suffering from hiatus hernia or oesophageal problems, or who drink too much alcohol, may also find they suffer from dental erosion due to vomiting.
Acidic foods and drinks can cause erosion. Acidity is measured by its ‘pH value’, and anything that has a pH value lower than 5.5 is more acidic and can harm your teeth.
Fizzy drinks, sodas, pops and carbonated drinks can cause erosion. It is important to remember that even the ‘diet’ brands are still harmful. Even flavoured fizzy waters can have an effect if drunk in large amounts, as they contain weak acids which can harm your teeth.
Acidic foods and drinks such as fruit and fruit juices – particularly citrus ones including lemon and orange – contain natural acids which can be harmful to your teeth, especially if you have a lot of them often.
‘Alcopops’, ‘coolers’ and ‘designer drinks’ that contain acidic fruits and are fizzy can cause erosion too.
Plain, still water is the best drink for teeth. Milk is also good because it helps to cancel out the acids in your mouth.
There are a number of things you can do:
As well as using a fluoride toothpaste, your dental team may suggest you use a fluoride-containing mouthwash and have a fluoride varnish applied at least every six months. They may also prescribe a toothpaste with more fluoride in it.
Dental erosion does not always need to be treated. With regular check-ups and advice your dental team can prevent the problem getting any worse and the erosion going any further. If a tooth does need treatment, it is important to protect the enamel and the dentine underneath to prevent sensitivity. Usually, simply bonding a filling onto the tooth will be enough to repair it. However, in more severe cases the dentist may need to fit a veneer.
Costs will vary, depending on the type of treatment you need.
It is important to talk about all the treatment options with your dental team and get a written estimate of the cost before starting treatment.
Content originally appeared at: https://www.dentalhealth.org
Can decayed young teeth be saved with stem cells? Dr. Renato Silva thinks so.
When decay penetrates the nerve space in an adult’s permanent tooth—known as dental pulp—a root canal is the best solution. A dentist removes the nerve and pulp, and then cleans and seals the inside of the tooth.
But when that same problem occurs in a child or young adult, a root canal becomes much trickier, because the root of the tooth may not be fully formed. Dentists might try to clean and fill the root canal, or they might pull the tooth and replace it with an implant when the patient is older.
“We see a lot of kids come into our endodontic clinic and pediatric clinics with dental problems,” said Silva, D.D.S., Ph.D., associate professor and chair of the department of endodontics at The University of Texas Health Science Center at Houston (UTHealth). Factors that contribute to decay include not brushing and/or flossing, diet, saliva composition and genetics.
Depending on the age of the child, a permanent tooth will come in, but the root may take a few years to develop, said Ariadne Letre, D.D.S., Ph.D., director of research in the department of endodontics at UTHealth’s School of Dentistry and a member of Silva’s team.
Rather than choosing a root canal treatment or tooth extraction for young permanent teeth, Silva believes he can use stem cells to replace the damaged tissue with healthy tissue and promote root formation.
His research is in the preclinical stage, but results so far have been promising.
A microscopic image of tissue invagination into the tooth after 45 days of implantation.
Dental pulp is a complex bundle of tissue, blood vessels and nerves. The tissue dies when it is contaminated by bacteria. During a root canal, a dentist will dig out that contaminated tissue and replace it with an artificial material, Silva said, because you can’t leave an open space for bacteria to continue to grow. Even so, root canal therapy treated teeth are destined to be brittle and devitalized.
But what if there was a way to revitalize the tissue and make the tooth healthy again?
While pondering ways to promote root formation, Silva and his team came up with the idea of using stem cells retrieved from the root area deep inside the tooth called the apical papilla. Since they also needed some sort of scaffold for the cells, they devised one made of a polymer fiber impregnated with a protein called vascular endothelial growth factor (VEGF), to stimulate the growth of new blood vessels that would help with tissue and pulp regeneration.
“These stem cells of the apical papilla can turn into any type of tissue, and in our case, we need root and pulp tissue, so we thought, ‘Why not?’” Silva said.
After removing the decay from the tooth and cleaning out the root canal, Silva and his team fill in the area with stem cells and the VEGF scaffold, which will regenerate the pulp tissue, he said.
The stem cells come from extracting the third molar of the child—known as the “wisdom” tooth. Silva and his team collect the cells attached to the bottom of the tooth crown, isolate the stem cells and then use them in the decayed tooth.
Because the use of stem cells for dental treatment in humans is not yet approved in the United States, Silva and his team have been researching their theory on mice. After putting the stem cells inside the tooth, they implant the teeth on the back of mice to evaluate new tissue formation. The result has shown that the tissue and blood vessels from the mouse go inside the root and fill in the empty space, mimicking the original dental pulp tissue.
Once the use of stem cells is approved for this use, Silva and his team will move forward with isolating the stem cells of the apical papilla from third molars to deliver into the decayed tooth of the same patient.
“I believe our results are promising in light of future patient-centered approaches toward pulp and dentin regeneration therapies,” Silva said.
Article originally posted at: http://www.tmc.edu