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Questions and Answers
What is the purpose of evaluating and adjusting a fixed prosthodontic crown prior to the patient's delivery appointment?
What is housed in the articulated casts for evaluating a crown?
What is the benefit of having an untrimmed/untouched die for evaluating a crown?
What is the main advantage of reducing chairside time for crown adjustment?
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What should be used to examine the intaglio surface of the crown for irregularities?
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How should the marginal integrity on the crown be evaluated?
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Where should the evaluation of the quality and quantity of proximal contact be conducted?
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When should occlusion be checked?
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Why should provisional be carefully removed?
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How should the marginal fit of the crown be checked?
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Where should proper occlusion be checked?
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When should the crown be contoured, polished, and cemented?
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Why is the importance of proper interproximal contacts and marginal fit emphasized?
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What should be used to evaluate the intaglio surface of the crown for irregularities?
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How should the marginal integrity on the crown be evaluated?
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Where should the evaluation of the quality and quantity of proximal contact be conducted?
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What is considered an open margin in dental crowns?
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What is a common cause for poor margin adaptation of dental crowns?
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What is the purpose of adjusting the vertical dimension of occlusion on a patient’s crown?
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Where should occlusal contacts be placed to direct the occlusal force parallel to the tooth’s long axis?
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Why should excursive and protrusive interferences on a tooth and crown be removed?
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What should the contours of dental crowns mimic?
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What is the purpose of polishing a dental crown?
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What should be done if the margins of dental crowns are over-extended?
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What can be used to reference the interference area when improving poor margin adaptation?
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What should be checked and verified once the marginal integrity is acceptable?
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What should be removed to prevent discomfort or pain to the patient?
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What should the contours of dental crowns promote?
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Study Notes
Dental Crown Evaluation and Adjustment
- Margins of dental crowns should not be over-extended, short, over contoured, or opened, with an open margin considered when there is 50µm or more between the crown’s margin and the preparation’s finish line.
- Common causes for poor margin adaptation are failure for the restoration to seat completely and tight proximal contacts, which can be improved using various indicators to reference the interference area.
- Once the marginal integrity is acceptable, the occlusion is checked and verified in MIP or CR, adjusting the vertical dimension of occlusion on the patient’s crown to prevent discomfort, sensitivity, or pain.
- Occlusal contacts should be placed in areas that direct the occlusal force parallel to the tooth’s long axis, such as cusp tips, marginal ridges, and tooth fossae.
- Excursive and protrusive interferences on a tooth and crown should be removed to maximize the tooth and restoration longevity, as they can cause discomfort or pain to the patient.
- The contours of dental crowns, including emergence profile, line angles, and embrasure forms, should mimic the natural dentition and promote gingival health, with adjustments made prior to cementation.
- Polishing is the last step in evaluating and adjusting a crown, creating a surface that facilitates easy plaque removal and reduces the restorative material's abrasiveness to the existing dentition.
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Description
Test your knowledge of dental crown evaluation and adjustment with this quiz. Explore key concepts such as margin adaptation, occlusal verification, occlusal force distribution, and restoration contours. Evaluate your understanding of the process and techniques involved in ensuring a well-fitted and functional dental crown.
