What is Buildup for a Dental Crown?
A buildup, in the context of dental crowns, refers to the process of adding restorative material to a tooth to create a foundation for a crown. It's essentially preparing the tooth to receive the crown and ensure a proper, secure fit. This procedure is necessary when a tooth has been significantly damaged, decayed, or fractured, leaving it too short or structurally compromised to directly support a crown. Without a buildup, the crown wouldn't have a stable base, potentially leading to failure or discomfort.
Think of it like building a foundation for a house – you wouldn't simply place a house directly onto the ground without proper support; likewise, a crown needs a solid foundation.
Why is a Buildup Needed?
Several factors necessitate a buildup for a dental crown:
- Significant tooth decay or fracture: Extensive decay or a large fracture weakens the tooth structure, making it unsuitable for direct crown placement. The buildup provides the necessary bulk and strength.
- Short tooth: If the tooth is too short, a crown wouldn't have sufficient retention or protection. The buildup increases the tooth's height, providing a more stable platform for the crown.
- Improper tooth shape: In cases where the remaining tooth structure is irregular or uneven, a buildup helps reshape the tooth into an ideal form for crown placement. This ensures proper seating and aesthetics.
- Amalgam removal: Sometimes, old amalgam fillings need to be removed before a crown is placed. The removal might leave the tooth weak and needing a buildup.
What Materials are Used for Buildups?
The most common materials used for dental buildups are:
- Composite resin: A tooth-colored material that is relatively easy to work with and bonds well to the tooth structure. It's aesthetically pleasing and often the preferred choice for smaller buildups.
- Glass ionomer: A biocompatible material that releases fluoride, promoting tooth remineralization. It's often used in areas with high caries risk.
- Porcelain: More resistant to wear than composite but generally used for larger buildups or when exceptional strength is needed. It requires a more involved process and is less commonly used for buildups than composite resin.
- Amalgam: While less frequently used today due to aesthetic concerns, amalgam remains a durable option for certain buildups.
What Happens During a Buildup Procedure?
The buildup procedure usually takes place before the crown is fitted. The dentist will:
- Prepare the tooth: This involves removing any decay or damaged portions of the tooth and cleaning the surface.
- Apply the buildup material: The chosen material is carefully sculpted and applied to the tooth, gradually building up the necessary height and shape.
- Cure the material: If using a composite resin, this involves using a curing light to harden the material. Other materials have their own setting processes.
- Shape and polish: The buildup is carefully shaped and polished to achieve a smooth, natural-looking result.
What is the difference between a buildup and a core buildup?
While both terms relate to adding material to a tooth before crown placement, there is a key distinction. A buildup generally refers to the restoration of the tooth's form, increasing its height or restoring lost structure. A core buildup, however, specifically refers to rebuilding the tooth's internal structure, often in the case of a significantly damaged or decayed tooth with a large cavity. A core buildup might use pins or posts to reinforce the tooth. Essentially, a core buildup is a more extensive procedure, often involving a more substantial amount of material and reinforcement techniques.
How long does a buildup last?
The longevity of a buildup depends on several factors, including the material used, the extent of the buildup, and the patient's oral hygiene practices. With proper care, a well-placed buildup can last for many years, providing a stable foundation for the crown.
This detailed explanation should provide a comprehensive understanding of dental buildups and address many commonly asked questions. Remember to consult with your dentist for any concerns specific to your individual situation.
