The cabalistically alluring smile of lady Mona Lisa remains a mystery, but French scientists say they have cracked a few secrets of the famous painting. Researchers at The Louvre have studied seven of the museum’s Leonardo da Vinci paintings, including the Mona Lisa, to analyze the master’s use of successive ultrathin layers of paint and glaze – a technique that gave his works their soft and sensual quality.

Specialists from the Center for Research and Restoration of the Museums of France found that da Vinci painted up to 30 layers of paint and glaze on his works to achieve astonishingly high levels of subtlety. Added up, all the layers are less than 40 micrometers, or about half the thickness of a human hair, researcher Philippe Walter said Friday. The technique is called “sfumato,” and it allowed da Vinci to give outlines and contours a hazy quality (creating an illusion of depth and shadow). The technique’s use is well-known, but scientific study on it has been limited because, until the advent of advanced laser technology, tests required actual samples from the paintings.

Just as Leonardo da Vinci used the sfumato technique to intricately layer paint and glaze (creating beautiful works of art), a master artist uses similar techniques of layering porcelain powder to create realistic dental restorations. Dr. Sun chooses from approximately 30 different shades of porcelain powder, which are layered to create the illusion of a natural tooth. The result is an extremely high quality restoration, indistinguishable from an organically created tooth. It is important to note that the vast majority of porcelain technicians use only a few rudimentary shades of porcelain powder, resulting in a mediocre restoration which may look slightly artificial.

When searching for a cosmetic dentist, look for samples of his or her team’s work! Cosmetic dentists rely on an integrated team of clinical and laboratory experts to assist in creating lifelike porcelain restorations. Realistic shade and color should be present, not one solid shade of white. If possible, see how the restoration illuminates (how the tooth looks in natural sunlight) – is there a shift, like a natural tooth? Find a master artist who can provide you with the smile of your dreams. If you need a resource to find a cosmetic dentist in your area, the American Academy for Cosmetic Dentistry provides a search tool to find accredited AACD cosmetic dentists in your area.

It was not uncommon to see athletes removing and replacing their mouth guards before and after events; most wear clear silicon rubber guards while some wear colored ones. I am very pleased to see the awareness of preventing sport injuries on globally broadcast television -  all athletes with a chance of injury should be wearing a sport mouth guard to prevent oral facial injury, jaw injuries and even brain concussions.

The dangers of an unprotected oral cavity don’t just apply to olympians – any physical activity can result in an accident without safety precautions! Proper protection in the form of a custom-fitted mouth guard is vital to assure the health and safety of your teeth, jaw and fasciomuscular system. Using your teeth as a tool for anything other than eating food – even opening a plastic bag – can cause a tooth to crack.

Dental trauma usually results from an accidentally cracked or broken tooth. Many times, teeth that have previously been treated with a root canal are prone to breakage due to a weak and/or compromised structure. All root canal teeth should be capped with a crown to protect the tooth structure. Certain hard foods can also trigger tooth breakage, such as corn nuts, popcorn, hard candy, and especially ice! Tooth decay, periodontal disease and even cracked teeth can all be prevented! Most hygienists will inform patients of important daily cleaning habits, but rarely elaborate on dental trauma and how to prevent it.

If you ever find yourself in a situation with missing teeth, try and preserve them in milk. If your tooth becomes cracked, avoid using your mouth and get to your dental professional ASAP! If you have a night guard (or mouth guard), wear it to protect the site. If you can get to your dentist in a timely manner, the teeth may be reattached. Simple chipping can be repaired rather simply (bonding or porcelain veneers can be explored with your dental care professional). Your doctor will be able to evaluate you further and discuss whether more extensive procedures are necessary (like implants or a root canal). Whether you’re jogging in your neighborhood or racing for the gold, being prepared will help you avoid dental trauma.

The new teeth in the dino would grow directly beneath the existing teeth, similar to how our permanent teeth develop beneath our baby teeth. Wouldn’t it be nice to have a replacement tooth grow automatically whenever we have a problem?!

Earlier this year, researcher and long-famed paleontologist Jack Horner  had uncovered “B. Rex,” a 68-million year old T-Rex that is giving the academic community a lot to think about, both relating to dinosaurs and to the use of tooth material (and other mineral matter) in fossils. Through a special process of acid dissolution of ancient dino bones, organic material – blood vessels – were extracted and found in near-fresh condition!

“[We] dissolved away pieces of an even older dinosaur – a well-preserved 80-million-year-old duckbill – in acid, and again, found what appear to be blood vessels.” With this matter, new creatures could be genetically grown that had fallen extinct millions of years ago – a dino zoo even! What is interesting about dinosaur teeth however is that they illustrate how versatile teeth are in Earth’s many different life forms.

Humans obviously use their teeth for tearing, chewing and start the process of digesting food; speech and aesthetic purposes are also served by our teeth. Although we only have two sets of natural teeth, we can artificially create new teeth with implant dentistry. Other creatures have no teeth, like ducks and geese, which simply use their bill to seek out food and begin the digestion process.

The systematic replacement of old or broken teeth in dinosaurs is what’s driving research that will hopefully, in the future, result in human teeth being grown for human tooth replacement. Imagine being able to have a real, natural and healthy tooth installed in your mouth!

T-Rex tooth - it's replaceable!

Current technology, like existing biocompatible metals (such as titanium) are used to replace human parts like hip bones. Biocompatible  titanium is used for dental implant fixture, replacing a tooth’s root being implanted in the jaw bone. Porcelain restorations are then attached to the artificial titanium root after proper healing of the jaw bone.

It is also important to remember that not all dental implant restorations are made due to improper oral care or an irresponsible lifestyle! More and more people are being born with congenitally missing  teeth, which can cause surrounding teeth to become misaligned, a possible evolutionary trend. Early diagnosis always makes the restoration process easier.

Though technology is constantly evolving, and may at one point completely replace the need for artificial dental restorations, it is of the utmost importance to try and take care of what you have! A person’s original, natural teeth are always the healthiest and most desirable option.

The most commonly challenging dental dilemma for baby boomers is combating those dull and severely worn teeth. Many people are unaware of the slow aging process of loosing tooth structures, mainly from night grinding, erosion and attrition. Bad habits and poor hygiene can also ruin teeth. The approach to rejuvenate can be as simple as having your teeth whitened, or it could be more complicated, requiring a multidisciplinary approach with extensive time and financial investment needed.

Often times, porcelain veneers might be suggested by your cosmetic dental professional to restore an aging smile, but make sure your dental health has been evaluated first. It is pertinent to check whether or not the gum and bone tissues are healthy, if there are any missing teeth that haven’t yet been replaced and if any shifting bite or teeth issues have been addressed. If you have had prior cosmetic work done, however, maintaining your investment is vital if you want your new smile to last. Follow up any cosmetic procedure with proper hygiene habits, which include brushing and flossing twice daily (and after meals), a healthy diet, no smoking and no excessive drinking (sodas or alcohol). A night guard might also be recommended.

Baby boomers have worked hard to establish their careers, family and personal well-being – now it’s time to enjoy more of your accomplishments. Get the smile you’ve always wanted, as it’s not only for vanity but also truly for your overall health.  Visit your dental professional not only for a routine cleaning and check up, but ask for a comprehensive cosmetic evaluation, including a smile analysis, TMJ and occlusion check and a periodontal exam with an oral cancer screening. When you take care of your mouth, you are taking care of a vital bodily system which performs in delicate balance with the rest of your body. When your oral cavity’s health is at risk, your overall health is being endangered.

Root canal therapy (also known as endodontic therapy) is a procedure of treatment for the pulp of a tooth once it has become infected – the inner pulpal material  must be removed, in order to protect and decontaminate the tooth from future microbial invasion to the jaw bone. Once a root canal procedure is performed, however, the lack of nutritional supply in the tooth (once the organic tissue is removed from the tooth during the procedure) will render the tooth brittle, the weakened tooth should be reinforced and restored properly, with a post and crown.

Root canal treatment does have a bad reputation due to the pain and the stigma associated with the procedure. Often times, a patient will have a root canal performed and think the procedure was a success, only to have pain and infection return several years down the line. The complexity of the anatomic root variation could be an obstacle and techniques can often be tedious, which is why specialized service is usually performed by a highly trained dentist or endodontist. Special tools like microscopes are also often necessary for a successful procedure. Advanced instrumentation and technique will ensure long-term success.

Regular dental checkups are vital to properly maintain your dental health. If the unhealthy dental condition requires a root canal treatment or an extraction, have your dental professional explain the pros and cons of each option, then make an educated decision. If there is a mystery pain, a 3-D image (Morita Survey of CT scan) would be invaluable for proper diagnosis. Regular dental x-rays are not capable of capturing images of a cracked tooth nor accessory root canals (which are small and difficult to see). These tiny cracks or canal issues can lead to prolonged discomfort, which you may have thought was a figment of your imagination! If the prognosis was poor, or a tooth has broken down so much that it has become unrestorable, extraction and a dental implant might be a more sustainable investment to you dental health.  Prevention is always the best treatment! Brush and floss your teeth twice daily and after meals. If you have any dental pain, schedule an appointment with your dentist sooner rather than later.

Dental components like teeth and gum do play an important role in a smile. In today’s society, if a person’s dental components are not healthy or if they do not look right, most will feel far less confident to smile. As cosmetic dentistry has come into a heavier demand in recent years, smile design has become a term used for various clinical treatment plans and for aesthetic  improvement. This means smile design: projecting an enhanced smile through alteration of dental components as a practice of cosmetic dentistry. This is a type of comprehensive oral care that combines art and science to greatly improve the aesthetic appearance of the smile, as well as its health and function.

Proper smile design starts with a facial analysis, when the line between the pupils and the horizontal line from the connecting edges of your upper teeth (smile line) are [hopefully] in parallel harmony; the smile line should also harmonize with the upper curvature of the lower lip. Then we evaluate the color, size and alignment of the dental compound, whether it is somewhat in the right places and proportional in relation with the face.

Some of the most common cosmetic procedures include tooth bleaching (or whitening) which enhances the color appearance of your teeth, bonding and veneers or porcelain crowns(which can enhance the outward appearance of a tooth’s color or shape), and gum work (like a gingival plasty, gum contouring or crown lengthening) to harmonize with teeth. Straightening of teeth through adult orthodontics are also a part of cosmetic smile design – not only for improvement of the smile, but  to set up a healthier foundation for other cosmetic procedures (or simply to make the mouth easier to clean and maintain).

Laser dentistry is very complimentary to cosmetic dentistry. Laser smile design not only makes common procedures like teeth whitening and gum contouring quick and painless, but because of the laser’s highly focused energy path, very little tissue around the site is disturbed. Procedures are very non-invasive.

Ultimately, cosmetic dentistry and laser smile design could be a great investment if you are not comfortable with your smile or the condition of your teeth (especially if they are worn or broken down, requiring rehablitation or reconstruction). Once you present a confident and happy smile, people will smile back at you and many windows and opportunity will open! Give thought to whether it’s time to have a smile analysis and smile design performed by your dental professional. If you need to find out more about cosmetic dentistry, www.aacd.com can be a referral source.

These are common questions from patients looking for cosmetic dentistry.

If you’re interested in cosmetic dentistry to get yourself a winning smile, whether the problem is mis-alignment, cracked or chipping teeth, unsightly spacing, uneven or dark colored dentition, uneven or too much (or not enough) smile showing, or even gum erosion, the eternal question always arises: What would be the best solution?

In the past, crowns were the primary choice for masking tooth problems, but since the late 1980s, cosmetic dentistry has offered both bonding and veneers to improve your smile. This leads to the eternal question: “Bonding or veneers?”

Dental bonding involves the application of a durable composite material directly to the surface of the tooth, by your dentist, which is then sculpted and artistically shaped to the exact look the patient desires, to blend naturally and seamlessly with the patient’s existing teeth. A laser (or high intensity light) is then used to cure the composite material, hardening and reinforcing it to the surface of the tooth. This bonding technique has many applications, not only for aesthetic uses but also for prosthodontics and pediatric dentistry. The advantages to dental bonding are a quick treatment time (can be completed in one office visit after a consultation), and a relatively low cost per tooth when compared with porcelain veneers. Durability of bonding will be affected by the oral environment. Since composite bonding is a mixture of quartz particle (70% – 80% filled) and resin, discoloration and breakage is inevitable if your mouth has a high acidic pH value (if you are a soda drinker, lemon lover or candy sucker), if the bonding was not supported by a solid tooth structure, or if you are a night grinder.

Porcelain veneers are fabricated in the laboratory. They are 100% filled with hard mineral particles, and are fired at a high temperature with a vacuum (to procure the best physical properties to sustain the veneer’s strength in the harsh oral environment). Compared to bonding, there is more procedural work involved with porcelain veneers. There are different techniques to fabricate the veneer pieces (which call for different methods of preparation for the tooth); the pressing technique produces a stronger veneer, but requires 0.8mm thickness of the veneer. The porcelain powder build-up technique can produce super thin veneers (0.3mm), which produces a very conservative look on your tooth structure, while at the same time keeping a natural silhouette. The veneer piece lays on top of the tooth structure and is similar to a press-on nail. They chemically adhere to the tooth with bonding composite cement; since porcelain is acid resistant and stronger in physical properties than composite material, this restoration provides long-term service. When getting the veneers, the first visit consists of preparation and imprints f the teeth (which might involve anesthetic). After this, you will leave the office with temporary veneers which look like natural teeth. A wafer-thin veneer is then crafted out of porcelain which is seamlessly cemented to the front side of the tooth on the second visit. In addition to straightening teeth, porcelain veneers can close gaps between teeth, whiten teeth that do not respond well to bleaching, and can also be used to protect damaged tooth surfaces. The advantages to porcelain veneers over bonding is that veneers are much longer lasting (and stronger) than composite bonding material.

Whether you decide to invest in dental bonding or porcelain veneers, make sure you have all work done at a reputable dentist, preferably at a practice which has its own in-house ceramic lab. When ceramic work is done by an in-house lab with an in-house ceramist, any changes that need to be made to the length or color of the veneers can be done without requiring an additional office visit. Remember, the result of the cosmetic procedures are truly varied depending on the ability of the dentist, ceramist, your clinical situation and the communication between all parties involved. Do your research!

Both bonding and veneers are additive procedures, depending on the position, alignment and shape of your teeth, which is the foundation for any new restorations. This foundation will need to be in the right fundamental situation to receive restorations to result in a fabulous smile. In other words, sometimes, you do not need to do much to your own teeth before applying cosmetic restorations. It might be necessary to reduce or modify the tooth structure before anything can be added onto it to make it look perfect.

There is some risk involved with cosmetic bonding or veneers, so be cautious with any cosmetic procedure. A comprehensive evaluation of your present dental condition is absolutely necessary as a first step; blue prints of your teeth and of your prospective dental project are needed to establish clear verbal communication between all parties involved (including you), including possible mock-up or wax-up models to preview possible changes, which could avoid costly mistakes.

Do your homework: finding the right dental professional, discussing every aspect of your dental needs, understanding the pros and cons of each procedure, and making an educated decision will ensure you get the smile you’ve always wanted.