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Questions and Answers
What is the preferred type of tooth for providing occlusal support in a denture?
What is the preferred type of tooth for providing occlusal support in a denture?
What is the minimum mesio-distal length required for the preparation of a lingual rest?
What is the minimum mesio-distal length required for the preparation of a lingual rest?
Which of the following methods is used to prepare an anterior tooth for a lingual rest?
Which of the following methods is used to prepare an anterior tooth for a lingual rest?
What is the preferred tooth structure when a canine is absent for support?
What is the preferred tooth structure when a canine is absent for support?
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What is the required labio-lingual width for the preparation of a lingual rest?
What is the required labio-lingual width for the preparation of a lingual rest?
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Study Notes
Lingual Rests (Cingulum Rest)
- Lingual rests are typically used with anterior teeth.
- The preferred rest is the occlusal rest on a molar or premolar.
- An anterior tooth can be an abutment for occlusal support.
- A canine is preferred over an incisor as an abutment for a lingual rest, especially when there is no canine.
- Multiple rests on several incisors could be used.
Preparation of Anterior Teeth for Lingual Rest
- Two methods exist to prepare an anterior tooth for a lingual rest:
- First Method: A slightly rounded V-shape is prepared on the lingual surface, at the junction of the gingival and middle third of the tooth. The V's apex points incisally.
- Mesio-distal length of preparation should be a minimum of 2.5–3 mm.
- Labio-lingual width should be approximately 2 mm.
- Incisal-apical depth should be at least 1.5 mm.
- The initial preparation starts with an inverted cone-shaped bur.
- The preparation progresses to a smaller, tapered bur with a rounded end to complete the preparation.
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Description
This quiz covers the concept of lingual rests used in anterior teeth, focusing on their preparation and preferred abutments. It discusses essential techniques and dimensions required for effective preparation of anterior teeth. Test your understanding of this important aspect of dental practice!
