Dental OSCE (Objective Structured Clinical Examination) Practice Exam

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Prepare for the Dental OSCE Exam with interactive quizzes, flashcards, and detailed answer explanations. Boost your confidence and improve your clinical competencies!

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Which impression material is considered the most stable?

Polyether
Alginates
Polyvinyl Siloxane (PVS)
Plaster

The correct answer is: Polyvinyl Siloxane (PVS)

Polyvinyl Siloxane (PVS) is recognized as the most stable impression material due to its unique chemical and physical properties. PVS is a type of elastomeric impression material that exhibits excellent dimensional stability over time. This stability is crucial because it allows the impression to maintain its accuracy, which is essential for producing precise dental restorations. One of the key features of PVS is its ability to resist distortion when subjected to moisture and temperature variations, making it highly reliable for various clinical situations. This material also provides excellent detail reproduction, capturing fine details of the prepared tooth and surrounding tissue, which is vital for achieving a proper fit with dental restorations. Additionally, PVS does not react with the setting of gypsum products, allowing for accurate casts without dimensional change during the pouring process. This compatibility further enhances the overall stability and accuracy of impressions made with PVS, making it the preferred choice among dental professionals when stability is a critical factor.