Dental OSCE (Objective Structured Clinical Examination) Practice Exam

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What is the ideal amount of undercut required for a circumferential clasp?

0.05 inch
0.01 inch
0.1 inch
0.2 inch

The correct answer is: 0.01 inch

The ideal amount of undercut required for a circumferential clasp is typically 0.01 inch. This measurement is crucial for ensuring proper retention of the clasp when it is engaged with the abutment tooth. A minimal undercut allows the clasp arms to securely fit around the tooth while providing sufficient resistance against dislodging forces during functional activities such as chewing. In partial denture design, achieving the correct amount of undercut is essential. Too much undercut may cause undue stress on the abutment teeth and can result in discomfort for the patient, while too little undercut can lead to inadequate retention of the prosthesis. Therefore, 0.01 inch strikes the right balance, ensuring optimal retention and patient comfort in practical applications of removable prosthodontics.