Components of a Removable Partial Denture (RPD) Practice Test

These questions are part of the practice quiz. Start practicing

• What does passivity mean in the context of a clasp design?
• Which rest type is a crescent-shaped lingual or cingulum rest placed at the cingulum (or just incisally to it)?
• Which of the following statements about resin base denture bases is true?
• Which major connector is described as Antero-posterior palatal strap?
• Which is an indication of a basic cast circumferential clasp?
• The Kennedy Bar is another name for which major connector?
• Where is the best tooth to place an indirect retainer?
• In a mandibular RPD, the typical major connector is a:
• Swing lock should not be used in patients with reduced manual dexterity.
• What type of minor connector is open lattice or ladder-like design?
• For an I-bar clasp, the superior border of the bar tip should be at least how many millimeters from the gingival margin, and the horizontal approaching arm should be how far away?
• Which of the following is a suprabulge member used for extracoronal retention?
• In a basic cast circumferential clasp, which arm is at the junction of the middle and gingival third?
• To achieve minimal metal exposure and esthetics for open embrasures, which connector is preferred?
• In which clinical scenario is an RPA preferred over an RPI?
• Which of the following is a category of intracoronal direct retainers?
• Which clasp setup is shown?
• A double lingual bar is also known as which of the following?
• A palatal plate major connector is preferred when there is no interfering palatal torus.
• Indirect retainers resist lever action by stabilizing the denture base and are positioned ______ to the fulcrum line.
• RPA is especially suitable for Kennedy Class I and II cases under which condition?
• Which clasp setup is described as reverse action?
• During fabrication, the beading technique anterior and posterior for maxillary major connectors serves to prevent food entrapment.
• The anterior replacement tooth in an RPD is most commonly made from which material?
• Which mandibular major connector is indicated if open embrasures exist?
• Which statement best describes the central incisor as an indirect retainer?
• Which statement about esthetics is true?
• For a crescent rest, which option lists the correct dimensions: mesiodistal length, labiolingual width, and incisal-apical depth?
• Which major connector is preferred when mandibular tori are present?
• In a maxillary RPD, which major connector is described as a broad strap across the palate?
• Which statement describes the flexible behavior of a retentive arm along its length?
• Which major connector is typically used to maximize palate coverage and is described as a broad strap?
• Which statement correctly describes how the retentive arm interacts with the survey line and undercut?
• Which major connector is located on the labial aspect of the mandible?
• What opposes the retentive arm?
• Where should the external finish line of the maxilla be located?
• Which component is also known as the reciprocating arm?
• Which of the following is an infrabulge component?
• What type of minor connector is loop design?
• What is the primary purpose of a guiding plane in an RPD design?
• Which of the following is a tooth-related factor affecting clasp retention?
• Which suprabulge form is commonly used for esthetic retention?
• Stability in a clasp assembly is achieved by which component and from which part of the tooth does it derive?
• How does rigidity of the retentive arm change along its length?
• Which major connector is most likely to be used when edentulous support is needed across the palate and the patient has periodontally compromised remaining teeth?
• What are the auxiliary functions of indirect retainers?
• Which component is the rigid arm that braces the tooth against the action of the retentive arm?
• What is the role of retentive posts, beads, or nail heads on metal bases?
• Which major connector has a half pear-shaped cross-section measuring 5 mm high and 2 mm thick?
• Internal finish line for the mandible should be located relative to the external finish line?
• Which statement correctly identifies the major connector in an RPD?
• What is the other name for the Double Lingual Bar major connector?
• What is the Snowshoe principle in denture bases?
• Which major connector is a broad strap across the palate and commonly used in maxillary RPDs?
• Retention in a clasp assembly comes from which portion of the tooth?
• In the RPD framework, which connectors are primarily responsible for stability?
• Which term describes a direct retainer that engages within the restored natural structure of the abutment tooth?
• Which description represents a true combination clasp design?
• Which major connector is described as the most comfortable option?
• Which statement best describes the Rest-Proximal plate-I-bar designation in RPI?
• What RPD component connects part of the partial denture to the major connector?
• Which statement is included in the indications for a wrought wire combination clasp?
• Which of the following is NOT an indication for swing-lock mandibular major connector?
• What type of clasps approach the retentive undercut from a gingival or infrabulge direction?
• What type of minor connector is retentive posts, beads, or nail heads on metal bases?
• Which component is described as a flexible metal arm that grasps the tooth to retain the denture, possibly semi flexible for two-thirds of its length?
• Indirect retainers go on teeth ______ to the fulcrum line.
• One of the requirements of the clasp assembly is to have support. What does this mean, and from which part of the tooth does it come?
• In removable partial denture design, which component functions as an indirect retainer?
• The minor connectors connect part of the partial denture to the major connector.
• Which major connector is described as a swing lock mandibular major connector?
• Major connectors provide what function in an RPD?
• What is the purpose of major connectors in an RPD?
• A lug/ball rest is a type of lingual/cingulum rest: where is it typically located on the tooth?
• Which cross-sectional form is typically more flexible?
• Which component of a removable partial denture is defined as a metal extension or tab that rests on the teeth and directs forces to the teeth and pericemental bone?
• Which rest type has a rounded outline form and is typically placed on the lingual/cingulum area to minimize lateral excursive contact?
• The palatal plate major connector can be used for any classification when edentulous support is needed, while keeping the rugae open when possible.
• Which component directly connects minor connectors to major connectors?
• Which RPD component includes clasp assemblies (rests, retentive arms, bracing arms), mesh that retains the denture base, and esthetic and occlusal components?
• Which arm does not taper in a basic cast circumferential clasp?
• Which option correctly lists the mesiodistal length, labiolingual width, and incisal-apical depth for a crescent rest?
• Which component is described as a flexible metal arm that grasps teeth to retain the denture and can exhibit semi-flexibility along its length?
• Which of the following is an indication for a lingual plate or linguoplate mandibular major connector?
• Which major connector is described as the lingual bar mandibular major connector?
• Which term refers to the metal extension that rests on the tooth?
• What undercut is typically used with a wrought wire combination clasp?
• Which component provides reciprocal action to distribute forces to the abutment tooth?
• Which rest type is considered least desirable due to aesthetics and leverage when used on an anterior tooth?
• Minor connectors serve to connect to which components?
• How does increasing clasp relative diameter affect flexibility?
• What is the primary functional purpose of onlay occlusal rests?
• What is the Minor connector?
• Which of the following is an indication for a swing-lock mandibular major connector?
• In a basic cast circumferential clasp, which arm is all rigid?
• What clasp setup is shown?
• Horseshoe is another name for which connector?
• In the described circumferential clasp assembly, what does the red line represent?
• Minor connectors act as a ______ element and major connectors act as a ______ element.
• If a ledge-shaped rest seat is placed incisal to the opposing tooth contact, what happens during function?
• A palatal plate major connector is appropriate when there is no interfering torus and edentulous support is needed.
• Which rest type is the crescent rest?
• The Kennedy bar is another name for which major connector?
• What is the typical undercut size associated with a wrought wire clasp?
• Which size undercut is specified for a wrought wire combination clasp undercut requirement?
• Which RPD component serves to support artificial teeth and transfer functional forces to supporting tissues for stability and comfort?
• Why is the canine closer to the fulcrum line considered less ideal for indirect retainer than the central incisor?
• What is the relative flexibility of the tip of the retentive clasp arm compared to the rest of the arm?
• What is an example of a major connector used in a maxillary RPD?
• A cast circumferential clasp is a ______ clasp.
• On which surface is the retentive clasp arm typically located?
• What is the primary function of a rest in a removable partial denture?
• Resin base denture bases are typically made of which material?
• Which undercut magnitude is typically used for embrasure clasps?
• A palatal plate major connector is appropriate when edentulous support is needed and the rugae should remain open.
• In a circumferential clasp assembly, which component serves as the retentive element?
• Which mandibular major connector is the most comfortable?
• From where does the reciprocating arm originate in a basic cast circumferential clasp?
• Where do the terminus points of the retentive arm lie?
• Which clasp setup is shown?
• Indication for using a reverse action clasp includes which of the following height requirements?
• When an RPD includes an anterior replacement tooth, which material is commonly used for the tooth?
• What orientation do extended occlusal rests have relative to the long axis?
• On which surface is the reciprocating / bracing arm typically located?
• Which statement correctly describes RPI and RPA configurations in terms of their location and components?
• Which elements form the denture that replaces missing teeth and provides the base for artificial teeth?
• How does distance from the fulcrum line affect the effectiveness of the indirect action?
• Which category of extracoronal direct retainer comes from the occlusal aspect of the tooth and then goes cervical to engage the undercut?
• What technique is used during fabrication of a maxillary major connector to improve tissue contact and prevent food entrapment?
• What is the Bracing arm (reciprocating arm) in a clasp assembly?
• Direct retainers are used to create retention against vertical components. Why is this done for RPDs compared with fixed prosthodontic devices like bridges?
• Which rest type is described as having a rounded notch at the proximo-incisal angle and is beveled labially and lingually?
• What is the minimum functional depth of the lingual vestibule required for a lingual bar?
• Which teeth are ideal for being used as abutments for an indirect retainer?
• Which of the following feature sets defines an RPI clasp?
• In a basic cast circumferential clasp, which arm tapers?
• If a patient cannot accommodate a mesial rest, what alternative design can still restore retention and support?
• Which term describes the imaginary line relevant to major connector design?
• A wrought wire clasp is a ______ clasp.
• Which factor addresses possible future tooth loss?
• What best describes the role of minor connectors in an RPD?
• Minor connectors may connect to the denture base and to which other element?
• Which RPD component acts as the rigid connecting element that unifies the denture framework?
• Where does the retentive arm originate?
• Which features characterize an RPA clasp?
• Which term describes a basic cast circumferential clasp?
• Which maxillary major connector provides broadest palatal coverage and is often most rigid?
• What is the primary purpose of a rest or rest seat in a removable partial denture?
• Which component acts as the primary uniting element across the arch in an RPD?
• How should the retentive arm be tapered?
• Which component is the guiding plane in a removable partial denture framework?
• Which is a function of denture bases?
• Which of the following falls into the infrabulge clasp assembly category of extracoronal direct retainers?
• The angle of gingival convergence is the angle formed between which two things?
• Which orientation is recommended for the maxillary major connector relative to the palatal midline?
• To avoid transmitting tipping and rotational forces to the abutment, we clasp next to the ______.
• Which statement is listed as an indication for a wrought wire combination clasp?
• What is the angulation of a prep for a rest seat?
• The palatal plate major connector provides rigid coverage of the palatal area and is used when substantial edentulous support is required.
• What is the primary function of tissue stops in a denture base minor connector?
• Which anatomical variation can the anterior palatal strap accommodate?
• What type of minor connector is mesh design?
• What does encirclement require in a clasp design?
• Which category of direct retainer attaches within the restored natural structure of an abutment tooth?
• For esthetics due to less metal showing, which major connector is favored?
• Indication for using a ring clasp setup includes which rest arrangement?
• Indications for using an embrasure clasp include which Kennedy class grouping?
• Reciprocating arms are usually located on which side of an abutment tooth in an RPD?
• Which factors must be considered when selecting the mandibular major connector?
• Which term describes the component that bribes the tooth against the action of the retentive arm?
• _____ prevent the movement of the clasp arm toward the cervical.
• Which has better esthetics, extracoronal attachments or extracoronal clasp assemblies?
• Which clasp setup is essentially two joined circumferential clasps?
• An RPA clasp is a modification of an RPI clasp. Which statement correctly describes their differences?
• How much of the marginal ridge gets reduced for a rest seat?
• Where is the reciprocating arm placed?
• What are the dimensions of the cross-section of a lingual bar?
• Complete palatal plate is which major connector?
• Which of the following is a disadvantage of using a wrought wire combination clasp?
• Which connectors act as a stability element?
• What is a notable elongation characteristic of a wrought wire combination clasp?
• Which major connector is AP strap also abbreviated as AP?
• All of the following are contraindications for a lingual bar EXCEPT one. Which is the exception?
• Which component is also known as a reciprocating arm?
• The effectiveness of an indirect retainer is increased by which of the following?
• If you are going to make an embrasure clasp, what prep modification is required?
• Which of the following falls into the suprabulge clasp assembly category of extracoronal direct retainers?
• Which clasp setup usually requires a mesio-occlusal rest and a disto-occlusal rest on the abutment tooth?
• Which statement is true about the distances for an I-bar clasp?
• When designing a denture base minor connector, what are the recommended buccal and lingual extensions?
• When designing a denture base minor connector, the maxillary extension should extend as far posteriorly as is practical, and the mandibular extension should be what fraction of the residual ridge?
• How is the rigidity of the entire reciprocating/ bracing arm described?
• Which maxillary major connector is generally the most comfortable for most patients?
• Which rest type is located at the cingulum or just incisally to it and has a slightly rounded inverted V-shaped form?
• Which Kennedy classification requires an indirect retainer to resist rotation?
• Which clasp setup is 10 mm long from the origin on distal extension partial denture?
• What is the typical width range of a palatal strap major connector?
• Which maxillary major connector may not be accepted due to multiple borders?
• Which of the following is NOT a suprabulge form?
• A less-than-90-degree internal angle between major and minor connectors is described as which RPD feature that provides mechanical retention?
• Which major connector is described as the Double Lingual Bar (also known as Kennedy Bar or Split Bar)?
• Which clasp is known for flexibility in any direction?
• Kennedy classification for anterior palatal strap usage?
• Which of the following is an example of a major connector suitable for a maxillary RPD?
• What is an advantage of a wrought wire combination clasp?
• Internal finish line for the maxilla should be located relative to the external finish line?
• Which type of direction do infrabulge clasps use to approach the retentive undercut?
• Which rest type is described by a rounded triangular shape with a base width of at least 2.5 mm, a width equal to half the intercuspal width, and a length about one-half to one-third of the mesiodistal width?
• What RPD component is described as a rigid and bulky element that connects all parts of the denture together?
• Which component is primarily responsible for retention by engaging the tooth surface?
• In the RPI clasp, what is the location of the distal proximal plate?
• For potential future loss of teeth, which major connector is indicated?
• Why are lateral incisors not ideal for prepping cingulum rests in indirect retainers?
• Retentive arms are usually located on which side of an abutment tooth in an RPD?
• To avoid direct transmission of tipping and rotational forces to the abutment, we clasp next to the distal extension.
• Compared to the marginal ridge reduction, how much extra depth is carved from the floor of the rest seat?
• Which statement describes the retentive arm?
• Embrasure clasps are frequently used on the side of the arch with what condition?
• What clasp type is indicated when an undercut of 0.02 inch is present?
• Which component comprises the artificial teeth and their supporting base?
• What distance should the retentive arm be away from the gingiva?
• The angle of gingival convergence can be altered on the cast to allow for the best parts of insertion.
• Which clasp is commonly described as suitable for infrabulge principles and is shown as a T-bar design?
• Palatal straps are the most common maxillary major connector for a patient with which classification?
• Metal base denture bases are associated with which characteristic?
• Which conditions are managed by the lingual plate or linguoplate mandibular major connector?
• Which statement defines indirect retainers?
• Abbreviation AP stands for what in major connectors?
• Where should the external finish line of the mandible be located?
• When classifying direct retainers for RPDs, which factor primarily determines whether a retainer is intracoronal versus extracoronal?
• Which maxillary major connector is known as the anterior palatal strap or horseshoe?
• Which maxillary major connector is least desirable due to poor support and rigidity?
• Regarding prosthetic factors, longer clasp length results in greater flexibility.
• Minor connectors act as a ______ element.
• Extension guidelines for a denture base minor connector: the buccal extension should extend approximately how many millimeters over the ridge crest?
• Which major connector is indicated for weak periodontal support requiring splinting, presence of mandibular tori, and potential future tooth loss?
• Which component provides vertical support for an RPD by resting on the tooth surface?
• Which arm in a removable partial denture design has a terminal tip that extends below the survey line into the undercut?
• Which portion engages the undercut in the cervical 1/3?
• What factors do you have to consider when selecting the maxillary major connector?
• What fraction of the retentive arm is above the HOC?
• Which of the following is a category of clasp assemblies?
• Which statement correctly describes why the central incisor is used as an indirect retainer?
• Which arm is located at the junction between the gingival and middle thirds and does not enter the undercut area?
• A palatal plate major connector should be avoided if there is a palatal torus that would interfere.
• What is the required distance from the gingival margin to the superior border of a lingual bar?
• Which major connector contacts the teeth just above the cingulum rests at each end?
• What is the main function of the reciprocating / bracing arm?
• Which major connector is most commonly used on the maxilla for a patient with a Class III short edentulous span?
• Which of the following is a prosthetic factor that influences clasp retention?
• Which component connects the clasp assembly to the metal framework?
• Which major connector requires a minimum of 8 mm functional depth of the lingual vestibule?
• Which statement about double lingual bar is true?
• Which factor set includes all of the above when selecting the mandibular major connector?
• What does RPI stand for?