A dental crown is a tooth-shaped cap that covers a damaged or weakened tooth to restore its shape, strength, and appearance. Before a crown can be placed, however, a dentist may need to build up the tooth's structure. This process, known as build-up, is crucial for ensuring a proper fit and long-lasting crown. This article explores the reasons for build-up, the materials used, and what to expect during the procedure.
Why is a Build-Up Necessary Before a Crown?
A dental crown needs a solid foundation to adhere properly. If a tooth has suffered significant decay, fracture, or wear, it may lack the necessary structure to support a crown. Build-up essentially adds bulk to the tooth, creating a more even and stable base for the crown. This ensures a better fit, preventing the crown from shifting or falling off.
What Materials are Used for Build-Up?
Several materials can be used for tooth build-up, each with its own advantages and disadvantages:
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Composite Resin: This is a tooth-colored material that is relatively inexpensive and easy to apply. It's often used for smaller build-ups and is aesthetically pleasing.
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Glass Ionomer Cement: This material releases fluoride, which helps protect the tooth from further decay. It's often used as a liner under other restorative materials.
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Amalgam: This is a silver-colored metal alloy that is durable and strong. However, it's not as aesthetically pleasing as composite resin. Its use is declining in favor of tooth-colored materials.
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Ceramic: Ceramic materials offer excellent strength and aesthetics, often matching the natural tooth color closely. They are frequently chosen for larger build-ups, particularly in visible areas.
The dentist will choose the most appropriate material based on factors such as the extent of the damage, the location of the tooth, and the patient's aesthetic preferences.
What Does the Build-Up Procedure Involve?
The build-up process usually involves several steps:
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Preparation: The dentist will clean and prepare the tooth, removing any decay or damaged portions.
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Build-up Placement: The chosen material is carefully applied and shaped to create the ideal foundation for the crown. This may require multiple appointments, depending on the complexity of the build-up. The dentist will ensure the build-up is strong enough to support the crown and has the proper contours.
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Setting Time: The build-up material needs time to set and harden, which might necessitate a temporary filling or crown in some cases.
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Crown Placement: Once the build-up is fully set and hardened, the permanent crown is prepared and cemented onto the prepared tooth.
What are the Alternatives to Build-Up?
In some cases, a build-up may not be necessary. If the remaining tooth structure is sufficient, the dentist may proceed directly to crown placement. However, if the tooth is significantly compromised, a post and core might be required instead of, or in addition to, a build-up. A post and core provides a stronger foundation for the crown, especially in cases where there isn't enough remaining tooth structure.
How Long Does a Build-Up Last?
The longevity of a build-up depends on several factors, including the material used, the patient's oral hygiene practices, and the overall health of the tooth. With proper care, a build-up can last for many years.
What are the Potential Complications of a Build-Up?
While generally safe, potential complications of a build-up can include:
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Fracture of the Build-up: This is rare but possible if the build-up is not properly placed or the patient experiences trauma to the tooth.
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Sensitivity: Some patients experience temporary sensitivity after a build-up, which usually subsides with time.
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Allergic Reactions: In rare instances, allergic reactions to the build-up materials can occur.
How Much Does a Build-Up Cost?
The cost of a build-up varies depending on the material used, the dentist's fees, and the complexity of the procedure. It's advisable to discuss the cost with your dentist before proceeding with treatment.
By understanding the purpose and process of a build-up, patients can better prepare for this crucial step in the crown placement procedure. Remember to always consult your dentist for personalized advice and treatment plans.
