Glossary Entry: Undercut

 

Overview

Definition: An undercut is a specific dental term referring to a feature created in the preparation of a tooth for a dental restoration. It involves removing additional tooth structure below the height of contour to facilitate the retention and resistance of the restoration.

Detailed Description

 

Types and Variations

Variations: There are different types of undercuts depending on the specific restoration being placed, such as inlays, onlays, crowns, or bridges. Each variation requires a specific amount and angle of undercut to ensure proper retention.

Indications

Common Uses: Undercuts are commonly used in cases where a dental restoration needs additional stability and resistance to dislodgment. They are particularly important in situations where the tooth’s natural anatomy does not provide enough retention.

Insertion and Placement

Procedure: The creation of an undercut involves careful preparation of the tooth structure to ensure that there is adequate space for the restoration to sit securely. Special attention is paid to the angle and depth of the undercut to prevent overcutting, which can weaken the tooth structure.

Clinical Considerations

 

Potential Complications

Risks: Incorrectly prepared undercuts can lead to compromised retention of the restoration or even damage to the remaining tooth structure. Additionally, excessive undercuts can weaken the tooth and increase the risk of fracture.

Care and Maintenance

Maintenance Requirements: After the restoration is placed, regular oral hygiene practices such as brushing, flossing, and routine dental visits are essential to ensure the longevity of the restoration and overall oral health.

Additional Information

 

Related Devices

Associated Terms: Undercuts are often used in conjunction with dental materials such as dental cements, bonding agents, and impression materials to ensure proper adhesion and accuracy of the restoration.

Innovations and Advancements

Recent Developments: Advances in dental technology have led to the development of CAD/CAM systems that can digitally design and mill restorations, reducing the need for extensive undercut preparations and offering more precise and efficient solutions.

Regulatory and Safety Notes

Regulations: Dental professionals must adhere to strict guidelines and protocols when preparing and placing undercuts to ensure patient safety and the long-term success of the restoration. It is essential to follow proper infection control measures and maintain a sterile working environment during the procedure.