Tooth Restoration Methods Quiz

A thin, custom-made shell bonded to the front surface of a tooth to improve its appearance.

A veneer made from tooth-colored composite resin, which is applied directly to the tooth.

A veneer made from ceramic or composite resin, which is fabricated in a lab and then bonded to the tooth.

A type of restoration that replaces a portion of a tooth's surface, specifically the occlusal and proximal surfaces, without covering the cusps. It is made in a lab from ceramic or composite resin.

A type of dental restoration that replaces more of a tooth's surface than an inlay, covering at least one cusp. It is made in a lab from ceramic or composite resin.

A type of restoration that covers the entire tooth surface, replacing its crown. It can be made from metal, ceramic, or a combination of both.

A tooth restoration that covers the entire tooth except for the root, made from metal, ceramic, or a combination of both.

A type of dental restoration that involves removing tooth structure and placing a filling material directly into the tooth cavity.

A thin, narrow space between two areas of a tooth structure, often found between root canals or between cusps.

An indirect dental restoration that covers the entire chewing surface of a tooth, involving both the occlusal and proximal surfaces.

A direct restoration that fits into a prepared cavity in the occlusal or proximal surface of a tooth.

A 90-degree angle formed between the prepared tooth surface and the restoration.

A beveled edge with a 20-30 degree angle on the prepared tooth surface for metal restorations.

A crown preparation with a flat surface on the tooth's bottom, which is perpendicular to the long axis of the tooth.

It provides the primary retention for any restoration by creating a tapered shape that resists removal forces.

A type of crown preparation where the tooth is prepared with a rounded chamfer, a bevel, or a shoulder on the buccal and/or palatal surfaces.

The area where the cusps of the tooth are prepared for the onlay, a 2 mm reduction for a functional cusp and a 1.5 mm reduction for non-functional cusps.

A restorative procedure that replaces a significant portion of the tooth structure, including all or part of the crown and often the root.

Ceramic crowns are a type of dental restoration that covers the entire tooth surface, using only ceramic material.

All-ceramic crowns offer a natural appearance, being biocompatible and non-conductive for temperature sensitivity, making them a great option for front teeth.

All-ceramic crowns tend to be more fragile than other types of crowns and require more tooth preparation, which can pose a risk to opposing teeth.

MCCs, or Metal Ceramic Crowns, are a combination of a metal base and a porcelain exterior, offering strength and aesthetics.

MCCs provide both durability and aesthetics, being less expensive than all-ceramic crowns.

MCCs can have an opaque appearance due to the metal base, posing a risk of a visible dark edge at the gumline.

Zirconia crowns are known for their high strength and translucency, providing a natural look with excellent durability.

Zirconia crowns offer excellent strength, translucency, and biocompatibility, making them a suitable option for a wide range of tooth restorations.

While strong, Zirconia crowns can wear down opposing teeth over time and might have metal sensitivities for some patients.

E-MAX: Lithium Disilicate Crowns are a type of ceramic crown known for its exceptional aesthetics and durability.

E-MAX crowns offer exceptional aesthetics and durability, making them a favored choice for both front and back teeth.

While aesthetically pleasing and durable, E-MAX crowns can be more expensive, with some reported cases of failure when used for multiple units in posterior teeth.

Composite crowns are the most affordable type of crown, made from composite resin.

Composite crowns are relatively inexpensive, softer for comfort, and offer less sensitive bonding techniques.

Composite crowns are the weakest type of crown, requiring more frequent replacement compared to other materials.

Gold crowns are strong, resistant to wear, and last a long time. They are gentle on opposing teeth and require less tooth preparation due to their strength. They are ideal for back teeth, especially second molars, and provide a less sensitive cementation process compared to porcelain crowns.

Gold crowns can affect some individuals, leading to allergies or swelling. They conduct heat and cold rapidly, causing initial sensitivity for a few weeks. Gold can wear away over time, especially when used with full porcelain crowns or in patients who clench and grind. Gold casts from molten metal can create micro-gaps at the margins, making them more susceptible to decay.

Gold crowns are contraindicated in patients with metal allergies or sensitivities, patients with front teeth, those with extreme sensitivity to hot and cold, individuals with lifestyles affecting oral health, and those with active caries, periodontal, or peri-radicular disease. They are also not appropriate when a more conservative restoration is sufficient. Complete cast crowns are absolutely contraindicated in cases of systemic sclerosis (inability to open mouth), profound xerostomia (dry mouth), and certain other medical conditions.

A functional cusp bevel provides sufficient gold thickness over the functional cusp during chewing and parafunction, strengthening the restoration where occlusal forces are highest and allowing for some wear over time.

Occlusal offset grooves are design features that are generally not required in full coverage crowns. There is no evidence that overlays or three-quarter gold crowns with these features have better outcomes than those without.

A parallel belt is a feature designed to create both retention and resistance form in a crown. Its height keeps the restoration from tilting off the preparation.

Retention form in a gold crown preparation helps to keep the crown in place. It involves two concepts: total occlusal convergence (TOC) and taper. TOC is the angle at which opposing walls converge. Taper is the inclination of a wall in relation to the long axis of the tooth. The ideal taper is between 2-5 degrees, resulting in a TOC of 4-10. However, a more realistic range is 10-20 degrees.

Resistance form in a gold crown preparation focuses on preventing the crown from being dislodged in a non-axial direction. It is determined by factors like TOC, height of preparation (parallel belt), and the ratio of occluso-gingival height to bucco-lingual width.

A gold crown preparation requires the reduction of the tooth to create space for the crown. The preparation is typically done in stages, with the occlusal surface reduced first followed by the cusps, the functional cusp bevel, the interproximal areas, the marginal ridges, and finally the cervical margins.

A gold crown is primarily held in place by the shape and fit of the preparation, known as retention form. The preparation involves creating specific angles and shapes to ensure a secure and stable fit. These angles and shapes help to resist forces that could dislodge the crown.

Gold crowns can be used to retain a fixed prosthesis, which involves attaching multiple teeth together with crowns and bridges. This is often done when a patient has missing teeth and needs to restore both functionality and aesthetics.

To minimize the risk of tooth fracture, especially after root canal treatment (endodontic treatment), a gold crown can be placed on the tooth. This provides additional strength and support to the weakened tooth structure.

A gold crown can be designed to accommodate a metal-based removable prosthesis. This involves incorporating specific features into the crown that allow it to connect securely with the removable prosthesis, ensuring stability and function.

Gold crowns provide an excellent alternative to other types of crowns when aesthetics are not a primary concern, especially in the back teeth where they are less visible. They are also ideal for patients with grinding habits, history of repeated restoration failure, difficulty placing large restorations, or when a strong retainer for a fixed prosthesis is needed.