Crown & Bridge
Crown is a fixed dental prosthesis used to restore a damaged tooth or cover an implant. It resembles the lost, damaged or missing tooth and helps in restoring its shape, size and function. Bridges on other hand are fixed dental prosthesis used to replace one or more missing teeth by joining fabricated teeth with adjacent teeth or implant.
A dental crown may be required to protect a weak tooth from breakage, to restore an already broken tooth, to cover and support a tooth with a large filling, to cover misshaped or severely discoloured teeth, to cover severely attrited tooth, to cover a dental implant or to make a cosmetic modification.
Cons with Metal Crowns:
In recent time, magnetic resonance imaging (MRI), has become a common medical diagnostic imaging tool. Since it uses powerful magnetic fields to create images of the inside of the body, there have been concerns about the safety of metal objects like fillings, implants, and crowns in patient’s mouths. A few different factors determine if dental crowns and MRI are a bad combination.
Even if a crown is not pulled out, it can still be damaged. The strong magnetic field of the MRI machine can interact with the metal, causing it to vibrate. This vibration can move, bend, or break dental restorations. Even if a certain metal isn’t attracted to a magnet, it can still pose a danger. Some metals absorb the energy created by the magnetic field. This energy can heat the metal enough to cause burns on the surrounding tissue in the mouth.
Following are the different types of dental crowns:
Stainless Steel crowns: These crowns are generally used as permanent crowns in children. These crowns are ideal for restorations in children as they are prefabricated and don’t require multiple visits to the dentists. They are cost effective and usually come off along with primary teeth as they shed off to make space for permanent teeth in the oral cavity. Stainless steel crowns are often used as temporary crowns in adults, till customized crowns are fabricated.
Metal Crowns: These are generally made from alloys that are noble or base-metal alloys. Metal crowns are ideal choice for restoring molars as they can resist biting and chewing forces, and don’t break or chip off easily. Since they aren’t tooth coloured crowns, they cannot be used to restore front teeth. In our practice we consider these crowns as out-dated.
Porcelain-fused-to-metal Crowns: PFM crowns provide best of both the worlds. They have metal’s strength and porcelain’s aesthetics. After all ceramic, PFM crowns are the second best in terms of providing natural tooth like colour.
Disadvantages of Porcelain fused metal (PFM) crowns:
> Aesthetic limitation as they have metal framework and opaque layering of porcelain reflecting metal greyish shade
> Ceramic chipping under pressure and leading to entire crown replacement.
> Wear antagonist natural teeth
> Increased plaque accumulation
> Not recommended to metal allergic individuals.
Emax crowns: These crowns are strong as well has natural tooth like appearance due to light transmitting quality. They are the latest cosmetic porcelain. E-max is an all-ceramic crown that is based on lithium disilicate glass. The crown is usually milled from a single block of ceramic, which makes it very tough and durable. E-max is extremely durable and highly aesthetic; hence it is widely used for restoring teeth in the anterior (front) region as it gives best match to your natural teeth.
Empress Crowns: Empress Crowns provide utmost aesthetics due to its close resemblance to natural teeth. However these cannot be used to restore back teeth which are subjected to high occlusal forces due to less strength of material.
Feldspathic Crowns: These crowns are believed to be the most beautiful porcelain crowns. However these are technique sensitive and are used by only by skilled dentists and laboratory technicians.
Procera Crowns: Procera is an all-ceramic restoration that has successfully taken metal out of the mix in the production of dental crowns. They are made with an aluminium oxide as base coping that is custom milled with CAD technology and a superficial stacked translucent porcelain layer that is used to make the restoration attractive and lifelike. They are biocompatible and its tissue-friendly material encourages gums to grow back around the tooth. It can be used for front as well as back teeth restorations of crown and bridges.
Zirconium Crowns: Zirconium crown is a CAD CAM milled all-ceramic crown that are mainly used for front and back teeth crown and bridges and as implant abutments. There are many brands of this product and some have higher clinical success rates. Some of these are 3M Lava, Cerec, Bruxzir, etc.
Patients who wish for excellent dental restoration should always choose zirconia crowns over conventional porcelain fused metal crowns (PFM) or full gold crowns due to their superior strength, durability, and excellent aesthetics. For fixed dental restoration always prefer zirconia crowns and bridges, as they possess excellent aesthetics and have good strength, zirconia is the most popular material for making dental crowns and other restorations in back teeth.
There are two types:
Solid /Monolithic zirconia: They are opaque generally for posterior teeth, making it durable to withstand forceful chewing and grinding. They are effective for masking highly discolored dental restoration such as post n core or restoring dental implants.
Layered zirconia: They are more translucent and opalescent, unlike solid zirconia, it is especially suitable for anterior crowns. Although if enough clearance is present can be used for posterior teeth.
> These crowns are 100% metal-free, prevent gingival darkening, and remove the possibility of exposing metallic margins if gum recedes.
Teeth Care Centre®: has a highly talented cosmetic dentist which render beautiful smiles by fabricating life like crowns. Based on your individual requirement, our team of dental professionals help you to select the right type and material of crown for you, so that you get the amazing radiant smile.
CAD/CAM technology: – Teeth Care Centre is equipped with modern instruments and incorporates the latest dental technologies in the clinic and therefore we use the latest CAD/CAM technology to design and fabricate custom inlay/onlay/crowns. This means you can leave the dental office with a fully aesthetically restored tooth.
Digital impression: – We also provide digital impression to fabricate prosthetic restorations like inlays, onlays, copings and frameworks, single crowns and bridge to achieve more precise and accurate prosthesis. Moreover, these scanners are time-efficient (by reducing significant time to transport plaster models to dental lab), eliminates plaster model errors and allows better communication with the dental technicians, which in turns helps to fabricate the prosthesis faster, with very high accuracy and with exact shade matching.
Dental Laboratory support: TCC is associated with India’s best laboratory technicians to provide the highest quality dental restorations, crown and veneers delivered in a timely fashion with attentive services. We strive to provide the perfect blend of technical expertise with artistic hand and natural like shade matching along with maintaining the contour to amalgamate with the natural teeth.
Top brands of tooth coloured restoration used in Teeth Care Centre are:
3M- USA; Ultradent-USA; Ivoclar-Liechtenstein; Coltene-Switzerland; GC-Japan; Dentsply-USA; VOCO-Germany; Sirona-Germany.
These have unique technology for excellent aesthetics and low wear; strong long-lasting and natural looking results; addressing the opacities and translucencies of both dentin and enamel and allow better blending with natural tooth colour; great fracture toughness, strength and wear resistance.