Porcelain teeth, I believe the public must not be unfamiliar, is a restoration often used in restorative dentistry, to restore normal tooth shape and aesthetics, restoration of missing teeth and root canal treatment to protect the remaining tooth tissue and other roles. However, many patients are told that they need to remove metal crowns before doing MRI, so how much effect does the metal used in the mouth have on MRI?
Doctors say: metal restorations in the mouth do have an impact on the accuracy of tissue images during MRI. A study shows that the same imaging sequence, gold alloy has the least impact, cobalt-chromium alloy is the next largest, nickel-chromium alloy, and all-ceramic crowns because they do not have a metal component, so there is no adverse image on the imaging examination.
So how do we choose the right one for us from the many porcelain teeth available? Porcelain teeth are usually divided into inner and outer layers, the inside is metal, the outside is covered with a highly aesthetic ceramic material, due to the different materials used in the production of porcelain teeth, the family of porcelain teeth is also extraordinarily rich in variety.
Here’s how to choose the right porcelain teeth for you.
1.Nickel-chromium porcelain alloy
Non-precious metal nickel-chromium alloy porcelain teeth is used nickel-chromium alloy for the inner crown, the surface layer of porcelain. Its material is composed of: nickel, chromium, beryllium, manganese and other metals. Characterized by high strength, low price, and the ability to form a dense oxide layer, the past is one of the most common domestic use of porcelain teeth, in recent years, public hospitals have rarely seen this type of porcelain teeth, because the biggest problem of nickel-chromium alloy is that some patients can develop allergic symptoms. Nickel-chromium porcelain teeth on the person’s biggest irritation and adverse reactions mainly from the nickel metal. Due to the high activity of nickel compared to other metals, there is a free release of the metal, producing free black lines in the gums, and a slight toxic reaction.
Foreign data show that wearing nickel-containing hand jewelry in the population, 15-20% of women and 1-2% of men have allergies, inflammatory reactions of the skin mucosa, so nickel-chromium alloy porcelain teeth in the regular hospital dentistry has been eliminated.
2.Precious metal porcelain alloy
The main elements of precious metal porcelain alloy is gold, palladium, platinum, etc. Its outstanding advantage is that it is non-toxic and non-irritating, rarely causes allergies, and the precision of the restorations made is very high. In addition, the gold alloy orange-yellow base color is close to the human teeth and gingival tissue shade, without the problem of gray-black edge, looks beautiful and natural.
Precious metal porcelain with its excellent biocompatibility has been recommended by the industry, but because of the expensive precious metal porcelain restorations, the average domestic patient is more difficult to accept.
3, cobalt-chromium porcelain alloy
Nickel-chromium alloy porcelain has many drawbacks, while the high price of precious metals, ordinary people are difficult to accept, so the middle price of porcelain who can compete? Undoubtedly cobalt-chromium porcelain alloy has the advantage, because it does not contain harmful elements of nickel and beryllium, safe, reliable and reasonably priced cobalt-chromium alloy has become the first choice for patients non-precious metal porcelain restoration.
Cobalt-chromium alloy by the more stable nature of the cobalt metal instead of nickel metal, in comparison, the metal is much more stable, the adverse stimulus to people less, and cobalt-chromium metal than nickel-chromium metal hard, wear-resistant, and porcelain powder bonding force is also a little. But it is always an inexpensive material, not completely prevent bad irritation and gum black line, is not the most ideal restoration material.
4, all-porcelain teeth
As the name implies, is composed of porcelain, no metal crown, so in the permeability, refractive index, transparency is far from the metal porcelain teeth can not match, so all-porcelain teeth than metal porcelain teeth more beautiful, closer to natural teeth, the price is naturally higher. However, because there is no metal crown support, it is slightly less strong than porcelain teeth, so it is more suitable for aesthetic restoration of anterior teeth or cases of posterior teeth with a tight bite. Currently, the newly developed zirconium dioxide all-ceramic teeth are a great improvement in strength and are respected by practitioners as an option for patients.
In short, in the choice of porcelain dental materials, should be combined with their own economic situation and specific dental conditions, under the guidance of physicians to select the most suitable for their porcelain teeth, so as to call the perfect treatment experience.
How to choose porcelain dental materials.
1, cobalt-chromium porcelain has a very small toxicity, its toxicity is far less than nickel-chromium porcelain, almost harmless to the human body, allergic to the population is close to zero, so suitable for the general economic conditions of the population.
2, precious gold porcelain is undoubtedly a better choice today, due to the population suitable for posterior tooth restoration, for one thing, the material is biocompatible, periodontal tissue and the human body basically no effect, and secondly, its strength is sufficient, the possibility of chipped porcelain is low.
3, all-ceramic teeth both aesthetic and biocompatible, and no effect on future MRI, so suitable for better economic conditions, high aesthetic requirements of the population.
4, the choice of materials also take into account their own physical conditions, if there are chronic systemic diseases of the population, the priority is to choose all-porcelain crowns, followed by precious metal porcelain crowns.
In short, a good porcelain teeth can not be separated from the good materials, but also need the doctor’s exquisite technology, in order to let the porcelain teeth to play the maximum role.