Advantages and Disadvantages of Zirconia Crowns

Advantages and disadvantages of Zirconia Crowns

The new era of dental materials is flourishing and much has to do with the advantages and disadvantages of Zirconia Crowns. Zirconia is an extremely strong and hard materiel, close to 1200 Mpa, compared to  a traditional full porcelain crown at 250mpa. We measure in MPA’s or mega pascals. It is white and relatively opaque. So it is a great replacement for the previous metal that was used as a base underneath PFM’s, or porcelain fused to metal crowns. PFMs, were the standard of esthetic dentistry for the last 60 years or so.

Advantages and disadvantages of Zirconia Crowns

We are all familiar with the white crowns, that were relatively opaque, sometimes you sawAdvantages and Disadvantages of Zirconia Crowns a little metal sticking out at the gum line, causing a dark area at the neck of the tooth. These teeth were also often opaque and not terribly natural. This was because the  metal had to be hidden by an opaque white color, so as not to see greyish in the crown.One problem was that the porcelain can chip off of the outside of the crown revealing an ugly grey color.

Zirconia crowns have overcome these problems. The zirconia comes either in small blocks that can be milled in a CEREC machine, or, as one of the few dentists in Israel with a Sirona Inlab system in my office, I can mill large restorations  out of a puck of zirconia. Zirconia in its raw form is chalky. We mill it dry, and it needs to be put into an oven for 12 hours to sinter, or become hard. But once hard it is strong, tough and very exact in terms of its fit. One of advantages and disadvantages of Zirconia Crowns is that they are brittle. So we must be careful when adjusting the so as not to cause microscopic Advantages and Disadvantages of Zirconia Crownscracks which can lead to failure. All in all it is an amazing material and the  advantages and disadvantages of Zirconia Crowns  are far outweighed by the advantages.

Zirconia Crowns In A day

Zirconia Crowns In A day

Zirconia Crowns In A day is one of the great breakthroughs in digital dentistry. The are only a handful of dentists in the country who employ CEREC technology, Dr. Ari Greenspan being the first. Let’s discuss Zirconia Crowns In A day.zirconia crown

Zirconia Crowns

Zirconia is a new form of dental material that allows us to mill it into a crown using CAD-Cam technology. We take a three dimensional image of the teeth, design that crown or bridge and then mill it on the spot. Zirconia oxide is a synthesized material that is exceptionally hard and has optical qualities similar to tooth. It has many advantages over standard porcelain fused to metal crowns, namely: esthetics, durability, strength and hardness as well as high biologic compatibility. Because it is milled and not cast in metal from a wax mold, there are virtually no discrepancies in fit. Until recently, the only way to get such a material for a crowns was through the traditionalzirconia crownl’impression method. Another complication is that the zirconia is milled in an unfinished relatively soft states. It must then be finished and required hours and hours in an oven for a process known as sintering. The sintering requires special equipment that dentists don’t have.

Except in our office. We have recently started being one of  just a handful of dentists in the entire country with the ability and equipment to produce Zirconia Crowns In A day using new and advanced technologies that reduce the sintering time.sirona inlab 5 axis milling machine

The  Inlab dental laboratory system is not really used by dentists because of the complexity. We wanted the ability to control every aspect of our lab work to ensure perfection. As a result, we now own a 5 axis sophisticated milling unit and the special ovens necessary to make Zirconia Crowns In A day.

If you have any questions please do not hesitate to contact us.

Porcelain Crowns

Porcelain Crowns

Porcelain has the unique ability to mimic natural teeth. They are a bunch of different types of Porcelain Crowns and each has its own advantages.

Traditional feldspathic Porcelain Crowns

These are a glass ceramic that achieves a high degree of aesthetic result, can work for decades. It is usually applied by hand using a porcelain powder. The technician builds up the crown using a paintbrush and is able to layer different subtle shades into the crown. It is used as a veneering structure on porcelain fused to metal crown (PFM).

Porcelain Crowns

different types of Porcelain Crowns

Glass ceramics with fillers

These different types of crowns are very ethic as well and much stronger and fracture resistant that a regular glass ceramic crown. They are also suitable for CAD-CAM systems allowing the dentist to scan the tooth in the mouth and create the crown digitally and then have the machine mill the crown out. One type of porcelain is E-max cad. It is Lithium dislocate materiel that comes in blocks. They are blue in color since they have yet to polymerize completely. Once Porcelain Crownsthe crown is prepared, the crown goes into a porcelain oven and we glaze it to make it shiny and we can give it some color to mimic natural tooth shades. It is really quite an amazing materiel. It then gets bonded onto the tooth with composite cement.

Glass-Free Ceramics, Polycrystalline

 These are materials with alumina and zirconia Porcelain Crownszirconia. Porcelain crowns made out of these materials are very hard and durable. They are almost impossible to break and might be a good choice for people that grind their teeth. The one problem with them is that they are not so aesthetic and ignored to use them a layer of porcelain needs to fused onto the outside of the zirconia.


Esthetic Crowns

Aesthetic crowns These aesthetic crowns crowns manufactured from materials that are integrated with the tooth color. If you made the best possible way these crowns can fit in so perfectly that will be visible that the crown and the natural tooth. This is especially important aesthetic dental Hkdmiot.ctrim When is capped aesthetic? There are several cases where required to put a crown on Shen This can be after a root canal, tooth cracked or decayed tooth removed much when it is not enough tooth left to hold regular blockage. In all these cases required a crown, but the problem starts when it comes to front teeth which is very high aesthetic importance. This is where the role of aesthetic crowns.

Crown differential is called PFM crown and contains a metal inner layer and above a layer of white ceramics and white coloring gives the crown. These crowns problem is often reflected through the metallic paint ceramic layer and gives a grayish tinge and a metal tooth. Crowns technology CAD / CAM Modern technology has given the opportunity to create a particularly aesthetic crowns with equipment connected to the computer. Required crown designed using computer commands later sends special equipment that generates the crown as planned. The materials used in this type of crowns materials are colorless and thus solved the problem of the metal reflection through ceramics. Both materials are used extensively oxidized aluminum and zirconia. For more on updates on Zirconia crowns see Advantages and disadvantages of zirconia crowns

Aesthetic crowns

Dealing with front teeth treatment is very important to choose the most suitable materials and the most aesthetic to create a perfect smile . These materials allow.

Emax cad porcelain now being used with Cerec

Emax cad porcelain

Emax cad porcelain is a new materiel being used to make dental crowns. It has numerous advantages over standard porcelain. The Cad in Emax cad porcelain stands for  computer aided design , being used by the CEREC SYSTEM that allows for the manufacture of a CEREC crown in the dental office in  an hour.

Emax cad porcelain is a material called  lithium disilicate. It is exceptionally natural in its appearance and is hard to differentiate from natural teeth. But the greatness of this porcelain material is not in its beautiful esthetics, but rather in its strength.Emax cad porcelain

Porcelain strength

In general, dental porcelain is a strong materiel. It has great strength under compression. Imagine putting a piece of glass on a perfectly flat surface with 1 drop of water under it. Drive a car over it and it won’t break but put one grain of sand under and it will. It has poor resistance to lateral forces or flexural strength. Porcelain strength is measured in  MPaS or megapascals. Regular porcelain has something like 150 MPa’s but Emax cad porcelain is in the order of 400MPA’s. More than 2 times as strong as a regular porcelain crown with esthetic advantages.

When we make a CEREC  Emax cad porcelain crown, it comes in a block that is not fully formed and once the crown is manufactured, it needs to be fired in a porcelain oven to be completed and brought to strength. It is quite fascinating as the materiel has a blue colorEmax cad porcelain until it is removed from the oven when it takes it’s final beautiful shape and hue.

Depending on the situation, we use this material for many of our crown solutions.The  translucency,opalescence, and light diffusion properties of IPS e.max lithium disilicate were all designed to copy natural tooth for beauty and quality restorations.

Porcelain Veneers

How are porcelain veneers made?

Porcelain veneers can make your smile perfect. Here is how it works. We do a smile evaluation of your mouth and determine the right shape and color. On the first visit we prepare the teeth. A very small 1 mm layer of tooth is removed. This makes room for the veneer. A temporary is made. This is often nicer than the original teeth. Jerusalem dentist, Dr. Ari Greenspan can give you beautiful teeth.

On the second visit, we try them in and get your ok. A special composite cement is used and you go home a happy patient.

What’s the difference between dental bonding and porcelain veneers

Dental bonding is a tooth colored (composite) resin material that is light activated and done in one visit . Porcelain veneers can mask dark stains better with the more durable porcelain material. They are very thin veneers of porcelain that are bonded to your teeth. This procedure takes two visits in our practice. Porcelain veneers, also called porcelain laminates, are stronger than dental bondings and less prone to staining.

porcelain veneer Jerusalem porcelain veneer after


Types of Fillings

Where silver (amalgam) and gold were all that were used in the past for fillings in back teeth, today tooth-colored porcelain or composite are used. You can even give your teeth a “face lift” by removing your old metal fillings and replacing them with “invisible” ones.

gold inlay Jerusalem dentist english speaking porcelain crown  jerusalem dentist


More information and frequently asked questions about:  Porcelain Veneers

I have a space between my two front teeth. How can it be closed ?

There are several ways in which this can be corrected: Dental bonding (one visit); will improve discoloration and shape of teeth. Porcelain veneers (two visits)allow us to perfect your smile. Orthodontics; requires multiple visits and cannot correct color or shape of teeth.

close a space between front teeth jerusalem dentistspace closed with porcelain veneers  dentist in jerusalem


My smile is crooked, what can I do about it?

Although orthodontics is the ideal way for children and young adults to correct this condition, sometimes an alternative using restorative treatment with dental bonding, porcelain veneers or full crowns can make a pleasing result. As an adult, dental bonding or porcelain veneers can achieve aesthetically correct results in two visits or less.

My crown in the front doesn’t match my teeth — it looks fake. What can be done ?

A skilled aesthetic dentist will not only match the color and contour of the adjacent teeth, but your smile will look just as natural as it did before getting the crown. Check for a highly skilled aesthetic dentist near you if your not happy with your existing crowns. Please visit the American Society for Dental Aesthetics.

I have a “gummy” smile… can anything be done ?

With the advent of laser dentistry, this can be done very easily and Gummy Smile Before and Afterpainlessly in most cases. Tissue sculpting (gingivectomy) is an important adjunct to achieving a beautiful, healthy smile.

Cracked Tooth Syndrome

Cracked Tooth Syndrome

Cracked Tooth Syndrome is something we see dailing in the dental office. The teeth in our mouth are brittle and have a tendancy with age to break. Another factor in the

cracked tooth syndrome Jerusalem dentistbreaking of teeth is if they have big old fillings. The minute a tooth has a filling it has lost some integrity and begins to loose strength. Cracked Tooth Syndrome happens when we have such a fracture. Often times that crack is not visible. The crack can either be microscopic in nature or in an area that is not visible to the eye. Cracked Tooth Syndrome is usually diagnosed more by symptoms and less by actual visual inspection of the tooth.

Click Here for a video on cracked tooth syndrome

Cracked Tooth Syndrome And Root Canal

Patients often come in  needing a filling. When we remove an old filling, and look at the floor of the preparation, we can sometimes literally see a crack or craze line run-

cracked tooth syndrome jerusalem dentisting along the floor of the tooth, like in the picture . Should that crack propagate further down the tooth, it will reach the actual nerve and blood vessels in the tooth and Cracked Tooth Syndrome will end up causing the tooth to need a root canal. There are times that the tooth actually breaks along the line and sometimes that fracture is so deep under the gum line that there is no way to save the tooth.


When Is A Tooth With Cracked Tooth Syndrome Salvageable ?

The minute you begin to feel these symptoms Cracked Tooth Syndrome israel dentist of pain on biting or pain on releasing, you should see your dentist. Often times, If we can diagnose the tooth requiring treatment, a crown can solve the issue. A crown acts like a band that holds that tooth together and prevents the crack from getting worse. A treatment like this can actually save the tooth and prevent Cracked Tooth Syndrome from requiring you to have your tooth extracted.

Rabbi Samson Refael Hirsch and the power of the smile

The Power Of A Smile
The Words Of a Rabbi


smileThe Importance of a Smile: A SMILE costs nothing, but gives much. It enriches those whoreceive, without making poorer those who give. It takes but a moment, but the memory of it sometimes lasts forever. None is so rich or mighty that he can get along without it, and none is so poor but that he can be made rich by it. A smile creates happiness in the home, fosters good will in business, and is the countersign of friendship. It brings rest to the weary, cheer to the discouraged, sunshine to the sad, and is nature’s best antidote for trouble. Yet it cannot be bought, begged, borrowed, or stolen, for it is something that is of no value to anyone until it is given away. Some people are too tired to give you a smile. Give them one of yours, as none needs a smile so much as he who has no more to give.
– Rabbi Samson Raphael Hirsch

Dating Survey 2013 Rates Teeth As Most Important

Teeth important when dating ,survey says

When it comes to finding that perfect someone in the United States, people going out on dates are into nice teeth, well-groomed hair and perfect grammar over all the fancy clothes, fit bodies and flashy teeth


According to an annual survey conducted by the mega-dating site, sultry singles seem to hone in on how well someone speaks, and what his or her pearly whites look like, when meeting someone for the first time for romance.


The survey, called “Singles in America,” collected data from over 5,481 singles and more than 1,000 married couples, asking them a range of questions about their dating experiences, preferences and adventures.


The subjects of the study were not members, according to the site’s blog, but beautiful smile and datinginstead were men and women from the age of 21 and over from all around the country.


MarketTools spearheaded the findings, in association with biological anthropologist Dr. Helen Fisher and evolutionary biologist Dr. Justin R. Garcia of The Kinsey Institute at Indiana University.


“Whether they research potential dates on Facebook; if they ‘hook up’ with co-workers; how many times they have fallen in love; what they ‘must have’ in a long term partner—we asked them just about everything,” according to dating website.


The results of the third-annual 2012 survey were posted on’s blog this week, and highlighted some other interesting tidbits—besides teeth preferences and the importance of speech—which were telling of America’s dating singles.


The survey largely focused on the impact social media and online dating services have had on atypical meet-ups and budding love interests.


“A historically unprecedented number of single Americans are now turning to the Internet to find love,” the survey said. “Nearly one-third of singles reported that they have dated someone whom they met online.”


With the days of meeting singles through mutual friends or at a bar falling behind digital dating services and immediate Internet access, the “Singles in America” study showed that 49% of women, and 27% of men, said they would cancel a first date based on information uncovered during a quick Google or Facebook scan.


Because of that, a solid portion of daters also admitted that they clean up their personal pages before welcoming a friend request from a potential suitor.


Since most peoples’ phones are attached to their hands, the study also asked how singles would react to a date sharing “sexts” that were sent to them.


Unsurprisingly, nearly half of the men asked said they wouldn’t mind, whereas only 13 percent of women said they were OK with it.


Collectively, nearly a quarter of those surveyed admitted to sharing a sexy photo sent from another person.


Sticking to the technology theme, the study unveiled that over 90 % of singles also agreed turning to your smartphone, and sending a text message to end a relationship, is not proper etiquette.


“Sexting, new attitudes about virginity, the rise of ‘friends with benefits,’ emerging ‘Internet etiquette’ and women’s rising roles in courtship all presage a dramatically new dating landscape,” Fisher said about the extensive survey results.


Here are some other key findings from this year’s survey:


Men judge women most on:


Teeth (58%)


Grammar (55%)


Hair (51%)


Women judge men most on:


Teeth (71%)


Grammar (69%)


Hair (53%)


NY Times on CEREC

NY times on CEREC

OCTOBER 8, 2012, 3:00 PM

high tech dentistry


I was chewing a piece of steak on a Saturday night last month when an old filling shattered. Suddenly, along with steak I had chunks of gray amalgam and shards of tooth in my mouth. I felt the hole with my tongue — it seemed as large as a crater.


The Digital Doctor


In this special issue of Science Times, we look at some of the many ways that technology is changing the world of medicine.

Go to Special Section »

My dentist later confirmed that I now had a big hole in a molar, too big for a filling. But, the dentist said, if I could spare an hour he could make a crown and put it in, right then and there.


An hour? Aren’t crowns — those tooth-shaped caps that fit over teeth — supposed to require at least two visits? First, the dentist numbs the area and drills the tooth, filing it down to make room for the crown. Then, he or she makes an impression of the tooth to send to a lab. The hole in the tooth is covered with a temporary filling while you wait for your crown.


It arrives at the dentist’s office two or three weeks later. You return for another appointment. The dentist numbs the area, removes the temporary filling and glues the crown in place.


Now, new technology has produced a better way. My dentist happened to be one of the approximately 10 percent who use CAD/CAM — computer-aided design and computer-aided manufacturing — to create a crown while a patient waits. The result is a ceramic crown that can be glued in place. You are done less than an hour after you first sit down in the dentist’s chair.


Maybe you think that dentists are stuck in the technological dark ages, waving pliers and babbling about fluoride. In truth, the profession has quietly embraced sophisticated technology, and I was lucky enough to stumble upon a prime example.


The process starts the same way it used to: The area is numbed, and the dentist drills the tooth to shape it for the crown. But instead of making an impression of the tooth, the dentist uses a tiny camera to create a three-dimensional image of the drilled tooth. A computer program uses that to construct an image of what the tooth will look like with the crown in place. I could see it on the computer screen — a tooth that looked just like mine would when I left the dentist’s office.




Then all the details — the size and shape, the little ridges and indentations — are transmitted to a machine in an adjacent room that mills the crown from a chunk of porcelain. The result is an exact replica of what I saw on the computer screen. When the crown is ready, about 15 minutes later, the dentist glues it in.