Impressions for Removable Partial Dentures Practice Test

These questions are part of the practice quiz. Start practicing

• Higher amounts of which bone contribute to primary support for distal extension denture base?
• Which choice best describes the retromolar pad area?
• What is the function of a record base during the impression process for RPD?
• Border molding is performed to ensure what in impression?
• Which statement accurately describes the final impression process for removable partial dentures as presented?
• Which technique captures teeth in anatomic form and edentulous areas in the functional form?
• Why is border extension adequacy important in the impression for RPD?
• The statement: The broader the residual ridge coverage, the greater the distribution of the load, which results in less load per unit area.
• Maxillary border molding, which action is used for the posterior buccal region?
• Alginate is the material of choice for making final impression for removable partial dentures.
• Which of the following are common signs of an inadequate final impression?
• Which material is used to preserve the functional width and depth of the sulcus during impression-making?
• The retromolar pad area is best described as which of the following?
• In boxing impressions, boxing wax is attached how many millimeters below the border?
• Describe the steps to prepare a diagnostic cast from a preliminary impression in RPD work?
• Which statement about wax spacers is correct?
• What is the typical thickness of a custom tray?
• During mandibular border molding, what movement is used for the mid lingual region?
• Which elastic impression material has low dimensional stability, deforms in undercut areas, may have an unpleasant odor and stains, and cannot be thicker than 3 mm?
• Thermoplastic impression materials may fail to record minute details because they may undergo what during withdrawal from undercuts?
• Which of the following describes the criteria for adequate border molding in an RPD impression?
• Differentiate mucostatic versus mucocompressive impression techniques in the context of RPDs.
• Which statement best describes border molding during RPD impression procedures?
• Which material has a maximum thickness of 3 mm?
• Which impression technique uses pressure on primary stress bearing areas and secondary stress bearing areas rather than relief areas, which are covered with wax?
• How does a surveyed cast inform RPD framework fabrication?
• Removable partial dentures require fabrication of a custom tray prior to making the final impression.
• The total occlusal load applied to the removable partial denture depends on what 3 factors?
• The retromolar pad area is located posterior to the last mandibular molar.
• What is the main disadvantage of alginate alternative impressions?
• Should removable prostheses be removed at night and kept in water?
• During mandibular border molding, what determines the thickness of the lingual flange?
• Alginate alternative impressions are typically what type of material?
• Why is prompt pouring of a final impression emphasized in RPD fabrication?
• During maxillary border molding, which movement is used for the posterior buccal region?
• Anatomic impression for a tooth-supported RPD is typically taken in how many stages?
• What is the setting time of alginate alternative impressions?
• In selective pressure impression technique, relief areas are covered with wax to achieve what outcome?
• Which rigid impression material is very limited in use and can be used for bite registrations of small areas?
• How should you handle mobile edentulous mucosa during impression taking?
• After trimming and surveying the diagnostic cast, how many millimeters should be cut back toward the deepest part of the vestibule?
• In impression verification, why must abutment tooth details be carefully checked?
• In the Corrected Cast Procedure, what happens to the original cast on which the framework was made?
• Which statement accurately describes the difference between a primary impression and a secondary impression?
• Which elastic impression material is accurate, can be poured up to 7 days, has less distortion and shrinkage, moderate tear strength, and a setting time of 5-6 minutes?
• Which region serves as a landmark for extending the posterior border of the mandibular denture impression tray?
• Which impression material offers the best dimensional stability for final impressions in RPDs?
• Which material is more dimensionally unstable, imbibes water, and has lower tear strength compared with agar-agar?
• Which movement is used for the maxillary buccal frenum region during border molding?
• How do you manage the palatal seal in maxillary RPD impressions?
• Which waxes can be used to make functional form impressions of edentulous areas under occlusal load?
• Mandibular border molding, which movement is used for the posterior buccal region?
• How does an impression determine the location and shape of rest seats on abutment teeth?
• What are the three primary impression types used in removable partial denture fabrication?
• Which option lists the elastic impression materials?
• Which scenario best justifies choosing a functional impression over a static mucostatic impression in an RPD case?
• A custom tray was fabricated on this diagnostic cast. Which areas must be border molded for this partially edentulous arch prior to making a final impression?
• What is the main goal of using a reline impression in RPD therapy?
• During RPD impression procedures, why is moisture control emphasized?
• A narrower occlusal table helps to transmit forces more favorable, puts less forces on the residual ridge, and reduces horizontal forces acting on partial denture.
• Which material is most commonly used for preliminary impressions in removable partial denture work, and why?
• Iowa wax and Korekta waxes are characterized by which property?
• Name two primary stress bearing areas.
• What is the pouring window for alginate impressions?
• What is the primary purpose of boxing impressions in denture fabrication?
• What is the significance of border mold depth for maxillary RPDs?
• What is a consequence of underextension during border molding?
• Which material is more dimensionally unstable and imbibes water compared with agar-agar?
• What is the role of occlusal contacts captured on the final impression for RPD?
• Mandibular border molding, which action helps activate the masseter muscle in the posterior buccal region?
• What is the role of a record base and occlusal rim in RPD procedures?
• Which statement about ridge coverage and load distribution is true?
• Which item is placed after 2 mm is removed from the diagnostic cast to create room for impression material?
• What is the purpose of pouring the master cast from the master impression?
• Which type of impression materials are capable of recording tooth and tissue details accurately but cannot be removed from the mouth without fracture and reassembly?
• Prior to making the custom tray you have to place one layer of wax on the remaining teeth.
• Which elastic impression material is a reversible hydrocolloid that must be poured promptly due to border issues?
• How are the margins and undercuts managed on the master cast for an RPD?
• Which impression waxes have the ability to flow as long as they are in the mouth and thereby permit equalization of pressure and prevent over displacement?
• How many layers of wax are placed over the teeth when making the wax spacer?
• What form of impression is taken when the RPD is tooth-tissue supported and records movement of tissues under functional load?
• In the Corrected Cast Procedure, what is the step after reseating the framework on the remaining impression?
• Which of the following is NOT typically used as a final impression material in RPDs?
• What is the recommended care and storage for final impression materials and trays?
• Which of the following is an elastic impression material?
• What steps are involved in pouring and trimming a master cast for an RPD?
• Which impression type is designed to provide diagnostic information and evaluate the arrangement of teeth before final impressions?
• Excessive border extension in maxillary RPD impressions can cause which problems?
• If an alginate impression is not poured promptly, which outcome occurs?
• Which compound is heated and added to the tray during border molding to achieve rounded contours?
• Which statement about border depth and speech is consistent with best practices in maxillary RPD impressions?
• What is recorded in an anatomic impression?
• Why is an accurate bite registration critical for RPD fabrication?
• In RPD fabrication, what distinguishes a master cast from a working cast?
• What term refers to the substance that helps with the chemical adhesion of alginate to trays?
• How can you minimize patient discomfort during RPD impression procedures?
• What is the primary purpose of recording vertical dimension and centric relation in jaw relation records?
• Mandibular border molding, which movement is used for the buccal frenum region?
• How much impression material is typically used in custom trays?
• A well-recorded vertical dimension in an RPD primarily contributes to which aspects of the final denture?
• How is border extension ensured during border molding for maxillary vs mandibular arches?
• Which choice best completes this statement: A final impression should accurately capture ...?
• Which of the following is NOT a thermoplastic impression material?
• Border molding during the impression process is performed to record which area?
• Which scenario would most justify using a reline impression?
• A tray that is patient-specific, with a 2-3 mm thick base, a stepped anterior handle, and covering the hamular notches and retromolar pads for distal extension partial dentures is called what?
• Which rigid impression material is accurate for recording edentulous areas of the mouth and commonly used with complete denture patients, but can break easily in undercut areas?
• In the described technique that uses a framework off a cast from anatomic impressions, which step is included?
• How thick should the base be in the second pour?
• Why is a careful impression critical for patient comfort with an RPD?
• What form of impression records the anatomic form of the teeth and surrounding structures and is used to make a tooth-supported removable partial denture?
• For Kennedy Class I mandibular arch, the tray extensions should include retromolar pad area to ensure recording of which border tissues?
• What information must a final impression capture for abutment teeth in a tooth-borne RPD?
• What is the difference between functional and nonfunctional border techniques in RPD impressions?
• What precautions reduce distortion when pouring a final impression?
• Mandibular border molding, what movement is used for the anterior lingual region?
• In a tooth-supported removable partial denture, all support is derived from teeth rather than ridges.
• What is the purpose of undercuts in an RPD impression?
• In selective-pressure techniques, which tissue is given more pressure to optimize support and retention?
• What is the maximum thickness of rubber base material?
• For border molding of the retromolar pad, what action is performed?
• What is the main purpose of creating a custom tray for a patient?
• What is recorded by the functional impression?
• What is the technique called that uses a framework fabricated off a cast made strictly from anatomic impressions, with a custom tray attached to the framework, border molding, and final impression created?
• What is the primary purpose of having the mandibular tray handle more upright in border molding?
• During mandibular border molding, which movement is used for the posterior lingual region?
• How many layers of wax are placed over the edentulous areas when making the wax spacer?
• Pressure on which of the following areas will cause pain?
• In selective pressure impression technique, relief areas are treated how?
• Compared with a narrower occlusal table, a wider occlusal table is expected to cause which of the following?
• You notice a large void associated with the distal extension areas in the RPD final impression for this maxillary arch. What will be your next step?
• The surface contour of the ridge when it is supporting a functional load is called what?
• What is a potential consequence of not extending the tray to retromolar pad area?
• How does the presence of a survey line influence final impression interpretation?
• What is used to create the smooth rolled borders of a custom tray?
• If the custom tray does not extend to the retromolar pad area, what is a likely consequence?
• How does the impression influence the path of insertion and retention features of an RPD?
• Which option best describes how the master cast is used in planning denture retention and path of insertion?
• In the posterior lingual region, protrusion of the tongue activates which muscle?
• The greatest movement takes place at the most anterior or posterior extent of the denture base.
• The retromolar pad area is located posterior to which dental landmark?
• During mandibular border molding, what determines the length of the lingual flange?
• What is border molding and what purpose does it serve in RPD impression procedures?
• Why are two layers of wax spacer needed over teeth?
• Which material is known for excellent dimensional stability among common final-impression elastomers?
• What classes are functional impressions mostly used for?
• The tray handle should be more upright for which arch and why?
• In a distal extension partial denture final impression is made by capturing
• What is meant by 'undercut mapping' in the context of RPD impression and design?
• For a mandibular partial denture, border molding is performed on what area?
• The custom tray described covers which anatomical areas to accommodate distal extension partial dentures?
• Describe the typical sequence of impression-related steps in RPD fabrication from start to finish.
• Why are borders and undercuts marked on the master cast during RPD fabrication?
• Name common errors in border molding during RPD impression procedures and their consequences.
• Impression materials that soften at higher temperatures and resume their original form when cooled, but may distort permanently during withdrawal, are known as?
• Wearing a removable denture overnight can cause which condition?
• Directing forces during denture function are more favorable in which direction?
• Which elastic impression material is described as fluid at high temperatures and gels at lower temperatures, and must be poured immediately?
• Explain the selective-pressure impression technique used in RPD fabrication.
• Which material is categorized as an elastic impression material with mild to moderate tear strength and high stiffness?
• Which statement best describes the action used to mold the posterior buccal region during mandibular border molding?
• When teeth are removed and bone turnover occurs, cancellous bone is often replaced with cortical bone.
• What is the seat or denture base that a denture sits on called?
• Which of the following is a silicone-based option that serves as an alginate alternative?
• Which of the following is not a primary stress bearing area?
• In RPD impressions, what is the role of a spacer or relief material?
• A final impression tray for Kennedy Class I mandibular arch should ideally extend to cover the retromolar pad area to ensure full recording of border tissues.
• What is a master impression and when is it taken in RPD fabrication?
• In case of a mandibular partial denture, border molding is performed on the entire lingual aspect of the custom tray.
• Which statement best describes tray coverage requirement for Kennedy Class I mandibular arch final impressions?
• One function of occlusal stops is to help reorient the tray in the patient's mouth.
• Name three elastomeric materials commonly used for final impressions in RPDs.
• What happens if anatomy is not carved on the master cast after pouring the impression?
• What is a bite registration and how is it obtained in RPD workflows?
• In a Kennedy Class I mandibular arch, the final impression tray should cover retromolar pad area to ensure recording of which tissue?
• What are the essential checks performed during impression verification for RPD?
• In the RPD impression workflow, border molding is typically planned and performed:
• Which statement correctly describes the location of the retromolar pad?
• In RPD impression workflows, why is mucosal health and tissue tolerance important?
• Stock trays can be made from which materials and characteristics?
• What are the 2x2 mm squares in the wax spacer that expose tooth surfaces called?
• What should be documented regarding material details in final impressions for removable partial dentures?
• Which type of bone contributes to primary support for distal extension denture base?
• Lenko Adaptol impression material is associated with which application?
• For Kennedy Class I mandibular arch, the custom tray used for making the final impression should cover the retromolar pad area.
• In a partially edentulous arch with mobile mucosa, which impression approach is preferred?
• Which listing correctly identifies elastic impression materials?
• In Kennedy Class I mandibular arch impressions, the final impression tray should extend to cover which area?
• What process is performed in edentulous areas to capture the entire border for broad coverage?
• Why is a custom tray recommended for the final impression in RPD fabrication?
• Impressions that use boxing wax to preserve functional width and depth of the sulcus are called?
• How does the presence of a fixed partial denture influence impression for an RPD?
• In Kennedy Class I mandibular arch impressions, border extension to the retromolar pad area helps ensure proper recording of which tissues?
• Which of the following best describes the role of a survey line in impression interpretation?
• In a tooth-supported removable partial denture, the primary support is derived from which structure?
• What is the clinical rationale for using a functional impression in cantilever RPD cases?
• Name three types of thermoplastic impression materials.
• What factors influence the choice of final impression material for a given RPD case?
• How long can you wait to pour stone in alginate alternative impressions?
• Which factor most directly affects denture retention during border molding principles?
• Polyether as an elastic impression material is best described by which characteristic?
• During maxillary border molding, which movement is used for the anterior labial region?
• Why must stone be poured into an alginate impression within 30 minutes to 1 hour after the impression is made?
• Which factor is essential for planning retention elements on the master cast?
• How long does the first pour take to set?
• When is it appropriate to use a reline impression in RPD therapy?
• Mandibular border molding, which movement is used for the anterior labial region?
• During maxillary border molding, which movement is used for the buccal frenum region?
• An impression tray that can be metal or plastic, perforated or rigid, does not conform to a patient's tissues or teeth in a specific fashion, and must be modified is called what?
• The surface contour of the ridge when it is not supporting an occlusal load