Introduction of cad cam crown material
CAD/CAM has become more popular and embraced technology in dentistry and lab facilities. Its technology and innovation continue to evolve as different materials are used to create restorations. There is a variety of CAD/CAM Materials used for restorations, some are available in Block form which includes; glass ceramics, resin nanoceramics, zirconia, ceramics composites, ceramic, and resin composites. All materials have been designed to provide effective restorations, however, it’s important to take time to choose a good material that suits your patients need
What to consider when Selecting CAD/CAM Material
Confirm Intended Purpose of Material – It is important to ensure that the material has indicated the intended restoration type and placement.
Make sure you have the right equipment and supplies to use on the material for restoration
Follow instructions as per the book – To maintain the right features and thickness, you must follow each instruction with no alteration.
Patient preference – It’s important to take note of what the patient wants to know what material would suit their expectations.
About Zirconia Blocks
One of the best CAD/CAM Materials to be used is the Dental Zirconia blocks. Zirconia is known to cover bad decays, fractures, and discoloration. Its popularity has massively grown among dentists for improving tooth appearance and fixing perks. CAD/CAM’s integration into dental laboratory workflows has been driven in part by the increasing adoption of zirconia as a metal substitute. This relationship does not only go one way, however. Advances in dental CAD/CAM technology have been crucial for the development of high-strength ceramics.
The improved mechanical properties of current forms of zirconia, combined with their excellent natural esthetics, have helped to make this ceramic an increasingly popular option. Without CAD/CAM technologies, well-fitted prostheses using these materials would be extremely difficult to fabricate due to the material’s increased flexural strength and fracture toughness. CAD/CAM dental labs can design, mill, and stain/glaze robust zirconia restorations in a controlled and predictable manner, leading to less stress for all involved. CAD/CAM is integral to the continued success of zirconia as a restorative material.
Types of Zirconia Blocks
- 3D MULTILAYER DENTAL ZIRCONIA BLOCK
The 3D Multi-layer dental zirconia block has unique features of shade, translucency, and strength change in one block. It is best preferred for the open dental cad cam milling system. Some of its features include;
- Different shades are available ie Vita 16 A-D shades available
- 6 layers of shade transition in nature from cervical to incisal.
- High translucency (43-57% total light transmittance from cervical to incisal)
- High flexural strength (600-900Mpa:600Mpa in incisal transfer to 900Mpa in the cervix)
2. 3D Pro Multilayer Dental Zirconia Blocks
The 3D Pro Multilayer Dental Zirconia Blocks have a high melting point of Melting point, therefore it can repel melting during the milling process.
Its Features Include
- Have good flowability
- High melting point
- Simple to treat and clean as they have good anti-static properties
- Less adherence to milling equipment eases the use of hand milling
- Features a three-dimensional gradient
- Strong nature, therefore it lasts for long
Multilayer dental zirconia blocks are used for the crown, removable and fixed prosthesis.
3. Preshade Dental Zirconia Blocks-Wieland System
Vita 16 colors pre shade dental zirconia blocks series;
4Pc minimum quantity, DHL Delivery.
- Pre-shaded technics
- Uniform color
- Without post dyeing process
- Suitable for all contour crown, bridge, and anterior
Safety: No irritation, No corrosion, Good bio-compatibility
Beauty: Natural teeth color can be reproduced
Comfort: Low thermal conductivity, hot and cold changes do not stimulate the pulp
Durability: Over 1200MPa perturbed strength, durable and useful.
CAD-CAM Dental zirconia blocks sintering chart
Benefits of using dental Zirconia
Dental Zirconia is best known for its strong nature and its long life span. Zirconia is a good choice for the crown as the force used by the mouth to chew will not cause any cracks. Less preparation is needed to prepare the tooth.
- Long Life Span
Considering that the mouth is always active, you need cad/cam material that will last for a long time. Zirconia Crowns are very durable and last for about 5 years or more.
People’s bodies tend to respond differently when the restoration has been installed, however, Zirconia is the best choice when it comes to sensitive patients. Most dentist professionals prefer using zirconia as its biocompatibility, which means it does not convey any reaction from the body.
- Less Time Needed for Installation
The CAD/CAM technology acts as a catalyst during this process. The dentist is required to only use a milling machine to make the crown from a block of zirconia. This process is very fast and can only be done in just one visit to the dentist.
Disadvantages of having a zirconia crown
- Can be hard to match
Due to its opaque nature, the zirconia crowns can be hard to match especially for monolithic zirconia crowns. Therefore, it is mostly at the back of the mouth.
2. Potential wear on other teeth
Zirconia teeth are best known for their strong nature, however, their hardness may impact other teeth and cause wear and tear.
Zirconia crown with porcelain
The opaque nature of Zirconia crowns makes them look unnatural and not real, however, the dentist has now embraced coating the crowns with porcelain to bring out its natural look that looks like your natural tooth. However, some dentists have argued that Porcelain may increase the chances of wear and tear or zirconia which can easily discolor the tooth, this may be something to consider before giving it a try.
Zirconia crown cost
Zirconia cad cam crown material cost more than other types of dental crowns, such as ceramic, metal, and porcelain this is because of their good quality nature. Despite the cost, Zirconia is highly recommended when you would like a CAD/CAM material restoration. It is important to consult with your dentist to ensure that you settle for the best.