Dental OSCE (Objective Structured Clinical Examination) Practice Exam

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What is the recommended post width after root canal treatment?

1/4 of canal
1/3 of canal
1/2 of canal
2/3 of canal

The correct answer is: 1/3 of canal

The recommended post width after root canal treatment is typically 1/3 of the canal diameter. This width strikes a balance between providing sufficient retention for the post while also preserving enough of the remaining tooth structure. By adhering to this guideline, dentists can promote the structural integrity of the tooth, minimizing the risk of compromising the remaining dentin and reducing the potential for tooth fracture. Wider post preparations can lead to significant loss of tooth structure, which can increase the likelihood of tooth failure. Conversely, a post that is too narrow may not adequately support the restoration, potentially leading to failure as well. Therefore, the 1/3 measurement is regarded as ideal for maintaining a healthy balance between retention and preservation of the natural tooth.