WHY

Why is Zirconia Porcelain Teeth Recommended?

 Zirconia

For a long time, porcelain teeth have been a fast and effective way to repair teeth, but the metal ions of metal porcelain teeth will cause adverse reactions to the human body, such as blackening of gums, bleeding and shrinking gums... Due to the presence of the metal inner crown, the light transmission, color and shape are quite different from the natural teeth, and it will produce a blue-gray effect under the light. At the same time, metal porcelain teeth are unstable under the action of liquid oral acid and alkali environment bacteria, patients in the CT MRI metal has a certain interference, so the oral medical community has been trying to change this state, the current international oral community is popular is a new metal inner crown porcelain teeth - zirconia porcelain series.

SAFETY

What About the Safety of Zirconia？

Zirconia for both medical and dental use is excellent in terms of biosafety. Over the years, a large number of experiments and clinical cases have proved that zirconia has no toxic damage to bone and soft tissue cells. No anaphylaxis was reported.➊ Zirconia is sometimes mistaken for a type of metal. This is a chemical concept that confuses metal elements and metals, zirconia is not zirconium metal or zircon, although it contains metal elements, but it is an oxide ceramics. This is similar to the difference between sodium chloride (the chemical component of table salt) and sodium metal.➋ Patients ask whether zirconia is radioactive, in fact, zirconia derived from zirconia, need to go through multiple steps such as purification treatment, powder processing, etc., the processing process will remove all impurities. The standards of the State Food and Drug Administration have strict standards for all ceramic materials on the market, and can only be used as medical materials after meeting the requirements of radioactive experiments. And not only for zirconia there are requirements, but also for decorative porcelain, alumina, glass ceramics, etc. There are also the same radioactive qualification requirements. Experiments have shown that pure zirconia powder is not only less radioactive than glass-ceramics, but even lower than human bone tissue.

COLLAPSE RATE

Is the Collapse Rate of Zirconia Restorations High?

A large number of studies have shown that the incidence of zirconia porcelain disintegration is not higher than that of traditional porcelain restorations, and studies have found that zirconia porcelain disintegration mainly occurs in the interior of ornamental porcelain rather than at the interface between ornamental porcelain and zirconia base crown. There are three main reasons for the occurrence of porcelain collapse.

➊ The shape of the bottom crown is poorly designed, and the local surface decoration porcelain is too thick.

➋ Porcelain sintering is not subject to standard temperature control, such as rapid cooling.

➌ The doctor did not carry out reasonable treatment after adjusting the jaw, such as re-glazing and sintering, or standard three-step polishing, etc. These are all necessary steps.

ABRASION

Does Zirconia Cause Excessive Wear on the Teeth?

For some patients with tight bites and insufficient space for tooth preparation, zirconia restorations are a good choice, but if you are concerned about excessive wear on the teeth, you may not have to, because the abrasive properties of zirconia depend on the smoothness of the surface, not the hardness. Therefore, after polishing or glazing, the zirconia restoration will not cause excessive wear on the jaw teeth, and please hand it over to a technician for glazing or polishing after grinding.

BONDING

What to Pay Attention to When Bonding Zirconia?

Zirconia bonding is relatively simple compared to glass-ceramics. Because of its good strength, the choice of adhesives is very wide. No surface treatment by a doctor is required before bonding. Its active gene binds to zirconium ions to obtain chemical binding power. There are also a variety of color options.

FEATURES

What are the Characteristics of Zirconia?

Chapter 1. Features 

1.The color is very similar to the color of natural teeth, has a high aesthetic effect, excellent light transmission, and is more suitable for use in areas with high aesthetic requirements.

2.There is no metal odor in the mouth, no corrosion, no stimulation of the pulp nerve due to the alternation of cold and heat, excellent biocompatibility, durable. It can withstand strong bite force, prevent cracking, and be durable. Solves the problem of transparent blue, black lines and discoloration of metal porcelain gums.

3.During MRI examination, non-metallic zirconia does not have any obstruction to X-ray, and there is no need to remove dentures during MRI examination, saving a lot of trouble.

Chapter 2. Indications 

1.Zirconia porcelain teeth: cosmetic teeth, severe tetracycline teeth, fluorosis, deformed teeth, discolored teeth, etc... People who are allergic to metal or plastic can make single crowns and bridges of front and back teeth.

2.Zirconia whole zirconium:

➊ Cases of bruxism.

➋ Cases of insufficient space in the abutment.

➌ Implant cases.

➍ Other cases of easy collapse porcelain, etc.

一、     

Chapter 3. Requirements for preparing abutments 
1.Anterior teeth: incision end grinding about 2.0 mm, lingual grinding about 1.5 mm to prepare 360 degrees, shoulder table about 1 mm wide, axial jaw angle 2 degrees to 5 degrees.

2.Posterior teeth: maxillofacial grinding approx. 2.0 mm (working side 2.0 mm, non-working side approx. 1.5 mm), buccal lingual abrasion 1.5 mm ready 360 degrees, width approx. 1.0 mm shoulder platform, axial maxillary angle 2 degrees to 5 degrees.

3.Veneers: The key to preparing and positioning in the enamel part is to have a transitional step at the tongue incision margin, and determine that the edge of the step is not in the wear area of the bite jaw, the range of the incision preparation is about 1--1.5 mm, the lip surface is about 1.2--1.5 mm, and the shoulder table preparation angle of the neck part is about 10-30 degrees.

Chapter 4. Precautions for zirconia in clinical promotion 

➊ The abutment teeth are short, and the abutment teeth are sharp and do not fit.
➋ Insufficient space (insufficient strength of connection points) is not suitable.

➌ Single concave and bridge body inverted large can not be done.

➍ It is recommended that the doctor remove the gums and use silicone rubber to remove the mold.

➎ It is recommended to use a 16-color colorimetric plate (especially for full zirconium, it must use 16-color colorimetry, otherwise it will cause color difference).

Chapter 5. Creator of all-ceramic aesthetic restoration 

➊ The new zirconia high permeability strengthening process does not reduce the original flexural strength of zirconia materials.

➋ Extreme ultra-thin edge cutting to avoid cracking and chipping.

➌ The pre-dyeing process eliminates the manual dyeing step and completely avoids the color unevenness caused by immersion dyeing.

➍ Nano-scale powder formulation ensures superior machinability and extends milling cutter service life by up to 15%.

➎ The unique IFP just-in-time fitting process precisely controls and measures the final shrinkage of zirconia. This ensures that the final restoration is extremely stable and precise, making it ideal for use in long-span multi-unit bridges and implant superstructures.

Source: kq520

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