Principals of Amalgam Cavity Preparation Practice Test

These questions are part of the practice quiz. Start practicing

• For composite restorations with at least 0.5 mm remaining dentin thickness, what is used?
• Facial and lingual proximal clearance may be less than 0.5 mm when breaking contact would require excessive removal of sound tooth structure. Which statement is true?
• For gold or ceramic restorations with 0.5 to 2 mm remaining dentin thickness, what is used?
• Which term describes the junction of two surfaces in a tooth preparation?
• If a cavity is deep and near the pulp, which technique is used to protect the pulp before permanent restoration?
• What is the recommended occlusal depth for a typical molar amalgam prep?
• What do converging walls prevent?
• Which type of protection is not provided by a liner?
• In a Class II preparation, which internal feature helps prevent marginal leakage?
• What preparation step is the refinement of cavity walls and margins for optimal restoration?
• What restorative materials especially benefit from a base?
• What design feature includes each marginal fossa and the developmental grooves around the marginal pits?
• Why are amalgam margins important?
• In the presence of a small asymptomatic pulp exposure (<1 mm), which technique is indicated?
• How should a clinician handle a lesion near the gingival margin that undermines enamel?
• Which principle of amalgam cavity preparation pertains to making the cavity easier to prepare and place the restoration?
• What factors govern outline form?
• How should a preparation be treated when there's thin enamel at the cavosurface margin?
• What is the length of a 330 bur?
• What advantages does a sectional matrix have over a Tofflemire for Class II preps?
• What is the width of a 330 bur in millimeters?
• For amalgam restorations with less than 0.5 mm remaining dentin thickness, what is used?
• Desensitizers reduce dentin sensitivity by which mechanism?
• Which matrix systems are commonly used for Class II amalgam restorations?
• What is the difference between Class I and Class II outline forms?
• How much tooth structure should be left between cavosurface margin and the proximal contact area in a class I preparation?
• Which material is commonly used as a liner but not as a base?
• Which material is commonly used as a desensitizer in restorative dentistry?
• In a deep amalgam prep requiring thermal insulation, what role does the base play beyond thermal protection?
• Does amalgam have low or high edge strength?
• What is the primary purpose of using sealers or desensitizers in restorative dentistry?
• The recommended distance between the cavosurface margin and the proximal contact in a class I preparation is which of the following?
• For amalgam restorations with less than 0.5 mm remaining dentin thickness, which combination is used?
• How should internal line angles be treated in amalgam preps?
• For composite restorations with less than 0.5 mm remaining dentin thickness, what is used?
• When might a cusp bevel be indicated in an amalgam preparation?
• What should support enamel rods at the cavosurface margin?
• Which statement describes the effect of a cup-shaped cavity on the dentin bridge?
• Which principle focuses on providing access for preparation and restoration and improving visibility?
• For a symptomatic pulp exposure greater than 1 mm, which treatment is indicated?
• Why should internal line angles be rounded?
• If extension of preparation is more than half the distance from the primary groove to the cusp tip, what should you consider?
• GLUMA contains what percentage of HEMA?
• Which practice supports accurate proximal contact restoration in a Class II preparation?
• What is indicated for deep excavation approaching the pulp?
• For composite restorations with at least 0.5 mm remaining dentin thickness, which material is used to promote adhesion?
• In a class I preparation, the pulpal floor depth at the fossa is typically which value?
• Which feature most directly contributes to an amalgam restoration's ability to resist occlusal forces?
• Cavosurface margins are finished to achieve the best ________.
• A junction of two surfaces is called?
• Which sequence best reflects essential steps for a durable amalgam restoration, including condensation and finishing?
• Which product is commonly used as a desensitizer in restorative dentistry?
• Why is recreating natural occlusal anatomy important in amalgam preps?
• What action best achieves a smooth, flush margin after finishing?
• Which statement about bonding is true for retention in composite restorations?
• Name two common carving instruments used with amalgam.
• Which statement about liners is true?
• What is the effect of moisture contamination on amalgam placement?
• What is the primary role of a base in deep amalgam preparations that require thermal insulation?
• What is the primary purpose of retaining grooves in an amalgam prep?
• Which item is NOT one of the five primary resistance form features?
• In a Class II preparation, the outline form extends onto proximal surfaces with a proximal box.
• How does a wedge influence a Class II amalgam restoration?
• What must be removed at the cavosurface margin?
• How much gingival clearance is required in a proximal preparation?
• Which statement is true about GLUMA's composition?
• What is the width of a 330 bur?
• What finishing steps follow carving in amalgam restoration?
• Why is convenience form important in cavity preparation?
• How does improper matrix placement affect an amalgam restoration?
• For amalgam restorations with 0.5 to 2 mm remaining dentin thickness, what is used?
• Which design feature prevents dislodgement of the restoration by lifting or tipping forces?
• In a class I preparation, the pulpal floor depth at the fossa is typically which value?
• Which of the following is one of the five fundamental principles of amalgam cavity preparation?
• What prevents proximal displacement of a restoration?
• What is the recommended approach to occlusal adjustment after finishing?
• How does proper matrix selection and placement help restore proximal contact?
• Which shape of cavity causes rotation of the restoration and a wedging effect on the supporting dentin bridge?
• What does a composite restoration rely on instead of a dovetail?
• What is indicated for an asymptomatic pulp exposure less than 1 mm?
• Which design category includes retention grooves, beveled margins, slots, and pins?
• What is the typical sequence of steps when finishing an amalgam restoration after condensation?
• The cavosurface angle is defined as the angle formed by which two features?
• Which is the recommended characteristic of internal line angles in amalgam preparations?
• How does convenience form affect the success of an amalgam prep?
• For gold or ceramic restorations with at least 2 mm remaining dentin thickness, what is used?
• In a class I preparation, marginal ridges are involved.
• Is a dovetail required for composite restorations?
• How wide should the isthmus areas be in a class I preparation?
• What is the effect of field isolation on the quality of an amalgam prep?
• Which feature constitutes a sound Class II gingival seat?
• Dovetails are not required for composite restorations.
• Which preparation element is essential to resist occlusal forces in an amalgam cavity?
• Which technique improves isolation and proximal contact recreation in Class II preps?
• When is cusp coverage indicated in a posterior amalgam prep?
• GLUMA contains what percentage of glutaraldehyde?
• What is the purpose of retaining grooves in amalgam preps?
• Which principle is specifically about shaping and smoothing margins to achieve a clean finish?
• In a Class I preparation, the isthmus buccal-lingual dimension should not exceed ____ distance.
• In a class I preparation, how deep should the pulpal floor be at the ridges?
• Which instruments are commonly used to remove infected dentin during caries removal?
• Initial preparation may remove all caries so the caries removal step can be skipped.
• What is the length of a 330 bur in millimeters?
• What factors determine the need for cusp coverage in an amalgam prep?
• What is the role of a liner in deep amalgam preparations?
• What is the risk of leaving excessive dentin at the margins in an amalgam prep?
• How does occlusal load distribution influence the design of an amalgam prep?
• In terms of edge strength, how is amalgam typically characterized?
• In a class I preparation, the pulpal floor depth at the ridges is within which range?
• What is the purpose of a base?
• How much facial and lingual proximal clearance is generally required?
• What is the purpose of occlusal adjustment after condensation and carving?
• Resistance form prevents tooth or restoration fracture from which forces?
• Which material can be used as both a liner and a base?
• Which statement best describes how amalgam interacts with tooth structure?
• Which material relies on bonding to tooth structure rather than mechanical retention?
• Amalgam does not bond to tooth structure, thus increasing which property of the walls that contact amalgam?
• Which statement best describes the importance of verifying occlusion and contacts?
• Which option is NOT an example of secondary retention forms?
• In a Class II preparation, the isthmus is the portion of the cavity connecting an occlusal portion and proximal portion together.
• What shape of cavity is perpendicular to the long axis of the tooth?
• For amalgam restorations with at least 2 mm remaining dentin thickness, what is used?
• Which instrument combination is commonly used for carving amalgam?
• What is the typical indication for using calcium hydroxide liner in an amalgam prep?
• When is a liner indicated?
• What is the most important determinant of longevity for an amalgam restoration?
• Which of the following describes the consequence of improper matrix band placement before condensation?
• How can residual caries be avoided during caries removal?
• In a class I preparation, how deep should the pulpal floor be at the fossa?
• The isthmus width in a class I should be approximately which millimeters?
• Which statement about rounding internal line angles is most accurate?
• What is the purpose of matrix band placement before condensation?
• What instruments can be used to remove infected dentin?
• What step has the purpose of protecting the pulp and promote recovery when indicated?
• What pulpal response can a liner stimulate?
• For gold or ceramic restorations, what is used as a luting agent?
• How should pulpal protection be managed when using a glass ionomer liner?
• When is carving typically performed during amalgam placement?
• When is a base indicated?
• How should restoration contours be verified after finishing?
• What steps ensure a proper proximal contact after placing a Class II amalgam?
• What is the desired cavosurface margin angle for enamel in amalgam preps?
• Which statement best describes the role of margins in the longevity of an amalgam prep?
• How should marginal flash around an amalgam restoration be addressed?
• What is the primary objective of amalgam cavity preparation?
• Cusp bevel in amalgam preparations is typically indicated to:
• T/F: Sharp internal line angles are recommended.
• For Class I amalgam prep, where should margins be located relative to enamel?
• What is the angle formed by cavity walls and external tooth surface?
• Which feature can bitewing radiographs help assess when planning Class II amalgam preps?
• What design feature of cavity preparation allows the remaining tooth structure and the restoration to withstand forces directed toward the long axis of the tooth?
• What is the primary purpose of preserving tooth structure during amalgam cavity preparation?
• What are the five primary resistance form features?
• Which of the following is NOT a finishing step after carving?
• What is the minimum thickness of amalgam needed to withstand forces?
• A liner is indicated specifically for which type of exposure?
• What is a common pitfall in amalgam cavity preparations regarding enamel margins?
• Why might a zinc phosphate base be preferred in some amalgam preparations?
• What should be done if a marginal gap is detected after condensation?
• How should margins be finished at the cavosurface to prevent microleakage?
• How far into dentin should the initial cavity extension reach?
• Which statement best describes the term 'convenience form' in amalgam cavity preparation?
• What is applied to provide a barrier to protect dentin from residual reactants and oral fluids?
• Which cavity preparation step ensures the restoration seats properly by finishing the margins and walls?
• Why is adequate cavity depth important?
• Which term describes the general shape and margins of a cavity preparation to preserve tooth structure and caries location?
• Making opposing walls toward the occlusal converge will create retention. Which term describes this arrangement?
• What features provide retention in an amalgam Class II preparation?
• In a class I preparation, are marginal ridges involved?
• What design feature improves access, visibility, instrumentation, and material placement?
• What size condenser tip should fit passively into the cavity?
• Why is finishing cavosurface margins on enamel preferred for reducing microleakage?
• The carver is used to recreate which occlusal features?
• What materials are commonly used as bases?
• What considerations apply when planning a Class II amalgam restoration on a tooth with a strong proximal contact?
• Which materials are commonly used as liners?
• In terms of patient factors, what can influence the choice of cavity class for a restoration?
• Which principle involves cleaning the cavity and removing debris before restoration?
• For composite restorations with less than 0.5 mm remaining dentin thickness, which combination is used?
• What is the recommended approach to restoring a Class II preparation on a tooth with strong proximal contact using a matrix and wedges?
• Why should we aim for minimal extension in an amalgam prep?
• Which principle is aimed at preventing dislodgement of the restoration under functional forces?
• What shape should an amalgam preparation have for resistance?
• Which feature provides retention in a Class II prep?
• Which term describes a design feature that primarily improves access to the inner aspects of a cavity?
• Beveled enamel margins are only used in composite preparations.
• What is the role of the carver in defining occlusal anatomy?
• In a Class I preparation, the isthmus is the narrowest portion of a cavity preparation.
• What imaging technique is most useful for planning Class II amalgam preps?
• What is the term for the shape and perimeter of the cavity preparation in width, length, and depth?
• What are four examples of secondary retention forms?
• In a Class II preparation, the isthmus is the portion of the cavity that connects which two parts?