Partial Denture ( Dr. Sokly) I

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| By Deap Monypov
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Deap Monypov
Community Contributor
Quizzes Created: 3 | Total Attempts: 1,011
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Partial Denture ( Dr. Sokly) I - Quiz


Questions and Answers
  • 1. 

    1. A clasp most common use is?:

    • A.

      Ring clasp

    • B.

      Back action clasp

    • C.

      Aker clasp

    • D.

      Embrasure

    Correct Answer
    C. Aker clasp
    Explanation
    The Aker clasp is a type of clasp commonly used in dentistry for removable partial dentures. It is designed to provide stability and support to the denture by engaging undercuts on the abutment teeth. The Aker clasp is known for its durability and ability to withstand the forces of chewing. It is also easy to adjust and repair if necessary. Overall, the Aker clasp is a popular choice for dental professionals due to its effectiveness and reliability in providing retention for removable partial dentures.

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  • 2. 

    2. Infrabulge clasps originate:

    • A.

      Above the 12mm undercut areas

    • B.

      Above the occlusal surface of most premolars

    • C.

      Above the height of contour

    • D.

      Below the height of contour 

    Correct Answer
    D. Below the height of contour 
    Explanation
    Infrabulge clasps originate below the height of contour. This means that they are positioned below the highest point on the tooth's surface. Infrabulge clasps are used in removable partial dentures to provide stability and retention. By placing the clasps below the height of contour, they can engage undercuts on the tooth surface, which helps to secure the denture in place. This positioning also helps to distribute forces evenly across the tooth and minimize any potential damage or discomfort to the patient.

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  • 3. 

    3. Reciprocation between bracing and retentive components requires:

    • A.

      I bars be used

    • B.

      Aker clasp be used

    • C.

      Bracing components contacts after retentive components

    • D.

      Correct timing of contact during seating and removed of RPD

    Correct Answer
    D. Correct timing of contact during seating and removed of RPD
    Explanation
    Reciprocation between bracing and retentive components requires correct timing of contact during seating and removal of the removable partial denture (RPD). This means that the bracing components should make contact with the retentive components at the right time when the RPD is being inserted or removed from the mouth. This ensures proper stability and support of the RPD during function and prevents any unwanted movement or dislodgement.

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  • 4. 

    4. The basic movement of mandible:

    • A.

      Hinge movement

    • B.

      Translatory movement

    • C.

      Lateral movement

    • D.

      Hinge ,lateral and translatory movement

    Correct Answer
    D. Hinge ,lateral and translatory movement
    Explanation
    The basic movement of the mandible includes hinge movement, which refers to the opening and closing of the jaw like a hinge. It also includes translatory movement, which involves the forward and backward sliding of the jaw. Additionally, lateral movement is another basic movement of the mandible, which involves the side-to-side movement of the jaw. Therefore, the correct answer is hinge, lateral, and translatory movement.

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  • 5. 

    5. Maxillary major connectors most common use is:

    • A.

      Full palatal strap

    • B.

      Palatal strap

    • C.

      Anterior posterior palatal strap

    • D.

      Anterior palatal strap

    Correct Answer
    C. Anterior posterior palatal strap
    Explanation
    The correct answer is "anterior posterior palatal strap." This type of major connector is commonly used in maxillary dentures to provide stability and support. It extends from the anterior region of the palate to the posterior region, connecting the anterior teeth and the posterior edentulous area. This design helps distribute the occlusal forces evenly and prevents the denture from rotating or dislodging during function.

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  • 6. 

    6. Anterior posterior palatal strap especially use is:

    • A.

      Maximum rigidity

    • B.

      Minimum bulk

    • C.

      Use in most cases

    • D.

      Torus palatal

    Correct Answer
    D. Torus palatal
    Explanation
    The correct answer is "torus palatal." A torus palatal refers to a bony growth on the roof of the mouth, specifically on the hard palate. The use of an anterior posterior palatal strap is especially beneficial in cases where there is a torus palatal present. This strap helps provide maximum rigidity and minimum bulk, allowing for better stability and support in the mouth. Therefore, the strap is particularly useful in cases involving a torus palatal.

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  • 7. 

    7. Which of the following maxillary major connectors possesses the least strength and rigidity?:

    • A.

      Anterior posterior palatal strap

    • B.

      Palatal plate

    • C.

      Horse –shoe

    • D.

      Modified palatal strap

    Correct Answer
    C. Horse –shoe
    Explanation
    The horse-shoe major connector possesses the least strength and rigidity among the given options. This is because the horse-shoe design only covers the anterior teeth and does not extend to the posterior teeth or the palate. As a result, it lacks the additional support and stability that the other options provide. The palatal plate, anterior posterior palatal strap, and modified palatal strap all cover a larger area and offer more support, making them stronger and more rigid than the horse-shoe design.

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  • 8. 

    8. Which of the following clasps commonly utilize lingual undercut?:

    • A.

      Extended arm clasp

    • B.

      Back action clasp

    • C.

      Embrasure clasp

    • D.

      Ring clasp

    Correct Answer
    D. Ring clasp
    Explanation
    A ring clasp commonly utilizes lingual undercut because it is designed to encircle the tooth and engage the undercut on the lingual surface. This allows for better retention and stability of the clasp on the tooth. Extended arm clasp, back action clasp, and embrasure clasp do not typically utilize lingual undercut in the same way as a ring clasp.

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  • 9. 

    9. The external finish line is:

    • A.

      The external of framework metal and denture base plastic

    • B.

      The external of framework metal and supporting tissues

    • C.

      The external of framework metal and the natural teeth

    • D.

      The external of the natural teeth and the denture base plastic

    Correct Answer
    A. The external of framework metal and denture base plastic
    Explanation
    The external finish line refers to the outer surface of the framework metal and the denture base plastic. This is the area where the metal and plastic materials meet and create the external boundary of the denture. It does not include the supporting tissues or the natural teeth.

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  • 10. 

    10. Functions of a Major connector:

    • A.

      Component of RPD connect to acrylic resin

    • B.

      Kind of metal chrome cobalt

    • C.

      Functions as one unit

    • D.

      Unification, stress distribution, cross arch stabilization

    Correct Answer
    D. Unification, stress distribution, cross arch stabilization
    Explanation
    The major connector in a removable partial denture (RPD) serves several important functions. It connects the various components of the RPD to the acrylic resin base, ensuring stability and support. Additionally, it helps distribute the stresses exerted on the RPD during function, reducing the risk of damage or discomfort. Lastly, the major connector aids in cross arch stabilization, preventing movement or displacement of the RPD during chewing or speaking.

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  • 11. 

    11. Requirements of a Major connector:

    • A.

      Connects various parts

    • B.

      Distributes functional loads to both teeth and mucosa

    • C.

      Partial denture acts as one unit

    • D.

      Rigidity, non interference with tissues, minimize food impaction and unobtrusive

    Correct Answer
    D. Rigidity, non interference with tissues, minimize food impaction and unobtrusive
    Explanation
    The major connector in a partial denture is responsible for connecting various parts of the denture and distributing functional loads to both the teeth and the underlying mucosa. It needs to be rigid to provide stability and support to the denture. It should not interfere with the surrounding tissues to prevent discomfort or injury. It should also minimize food impaction, making it easier for the patient to eat. Lastly, the major connector should be unobtrusive, blending in with the natural teeth and gums for aesthetic purposes.

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  • 12. 

    12. The superior border of mandibular lingual bar major connector should be:

    • A.

      At least 3mm from the tooth/ tissue junction

    • B.

      At least 3mm from the tooth/ junction

    • C.

      As far from gingival margin as possible

    • D.

      At least 3mm above the tooth/ junction

    Correct Answer
    A. At least 3mm from the tooth/ tissue junction
    Explanation
    The superior border of the mandibular lingual bar major connector should be positioned at least 3mm from the tooth/tissue junction. This is important to ensure adequate space for oral hygiene and to prevent irritation or damage to the gingival tissues. By keeping the connector at a distance from the tooth/tissue junction, it allows for proper cleaning and maintenance of the oral cavity.

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  • 13. 

    13. The internal finish line is:

    • A.

      The butt joint between the metal and resin acrylic on the tissue side of the edentulous   area

    • B.

      The butt joint between the metal and resin acrylic on the outer surface of the RPD

    • C.

      A type of posterior palatal seal

    • D.

      A special type of above

    Correct Answer
    A. The butt joint between the metal and resin acrylic on the tissue side of the edentulous   area
    Explanation
    The internal finish line refers to the butt joint between the metal and resin acrylic on the tissue side of the edentulous area. This means that the finish line is located on the inner surface of the removable partial denture (RPD), where the metal framework and resin acrylic material meet. This finish line is important for ensuring a secure and comfortable fit of the RPD on the edentulous area.

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  • 14. 

    14. A combination clasp assembly generally has:

    • A.

      A bracing arm , a retentive arm and rests

    • B.

      A retentive arm ,rests and indirect retainer

    • C.

      Rests, a retentive arm and proximal plate

    • D.

      Rests , a bracing arm and proximal plate

    Correct Answer
    A. A bracing arm , a retentive arm and rests
    Explanation
    A combination clasp assembly generally consists of a bracing arm, a retentive arm, and rests. The bracing arm provides stability and support to the clasp assembly, while the retentive arm helps in retaining the clasp on the abutment tooth. Rests are used to provide additional support and stability to the clasp assembly by resting on the adjacent teeth.

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  • 15. 

    15. The external finish line on a maxillary class 1 RPD originates from the lingual of the guide plane of the terminal abutment and ends:

    • A.

      At the hamular notch

    • B.

      In the glenoid fossa

    • C.

      Opposite the buccal pouch

    • D.

      Opposite stenon’s duct

    Correct Answer
    A. At the hamular notch
    Explanation
    The external finish line on a maxillary class 1 RPD originates from the lingual of the guide plane of the terminal abutment and ends at the hamular notch. The hamular notch is a bony prominence located at the posterior border of the hard palate. This is an important landmark for determining the position of the external finish line because it provides stability and retention for the removable partial denture. The other options, such as the glenoid fossa, buccal pouch, and Stenon's duct, are not relevant to the placement of the external finish line in a maxillary class 1 RPD.

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  • 16. 

    16. The Gridwork of Minor Connector on a maxillary class 1 RPD:

    • A.

      Covers the hamular notch

    • B.

      Covers the tuberosity

    • C.

      Does not cover the tuberosity

    • D.

      Covers the crest and tuberosity

    Correct Answer
    C. Does not cover the tuberosity
    Explanation
    The correct answer is "does not cover the tuberosity." The gridwork of the minor connector on a maxillary class 1 removable partial denture does not cover the tuberosity. The purpose of the minor connector is to connect the major connector to the rest of the framework and provide stability and support to the partial denture. The minor connector should be designed in a way that it does not impinge on the soft tissues or cover any anatomical structures such as the tuberosity.

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  • 17. 

    17. Occlusal rest preparation should be:

    • A.

      Spoon shaped, at least1/3 the bucco lingual width of the occlusal surface, at least 1m  deep

    • B.

      Flat shaped, at least1/3 the bucco lingual width of the occlusal surface, at least 1mm deep

    • C.

      Pear shaped, at least 1/2 the bucco lingual width of the occlusal surface, at least 15mm deep

    • D.

      Teardrop shaped, at least 1/2 the bucco lingual width of the occlusal surface, at least 15mm deep

    Correct Answer
    A. Spoon shaped, at least1/3 the bucco lingual width of the occlusal surface, at least 1m  deep
    Explanation
    The correct answer is spoon shaped, at least 1/3 the bucco lingual width of the occlusal surface, at least 1mm deep. This is the correct answer because an occlusal rest preparation should have a spoon-shaped form to provide stability and support to the removable partial denture. It should also be at least 1/3 the bucco lingual width of the occlusal surface to ensure sufficient retention and stability. Additionally, it should be at least 1mm deep to allow for proper seating of the denture.

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  • 18. 

    18. A lingual plate major connector may be selected be cause

    • A.

      The mandibular incisors are tilted lingually, mandibular tori present, high lingual frenum

    • B.

      The mandibular incisors are tilted facially, high floor of the mouth

    • C.

      The mandibular incisors are tilted facially, mandibular tori present  ,high lingual fremum

    • D.

      The mandibular incisors are tilted lingually ,high floor of the mouth, high lingual frenum

    Correct Answer
    A. The mandibular incisors are tilted lingually, mandibular tori present, high lingual frenum
    Explanation
    A lingual plate major connector may be selected because the mandibular incisors are tilted lingually, mandibular tori are present, and there is a high lingual frenum. This suggests that there are anatomical factors in the patient's mouth that require a lingual plate major connector to provide stability and support for the prosthesis.

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  • 19. 

    19. An anterior posterior palatal strap major connector is less rigid than a horseshoe major connector because it (the AP strap) has less width:

    • A.

      The first statement is true but the reason is false

    • B.

      The first statement is false and the reason is also false

    • C.

      The first statement is true and the reason is true

    • D.

      The first statement is false but the reason is true

    Correct Answer
    D. The first statement is false but the reason is true
    Explanation
    The first statement is false because an anterior posterior palatal strap major connector is actually more rigid than a horseshoe major connector. However, the reason is true because the AP strap major connector has less width, which contributes to its reduced rigidity compared to the horseshoe major connector.

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  • 20. 

    20. In a circumferential clasp assembly, the arms may extend into an undercut:

    • A.

      The bracing arm

    • B.

      The reciprocating arm and retentive arm

    • C.

      The bracing arm and retentive arm

    • D.

      The retentive arm

    Correct Answer
    D. The retentive arm
    Explanation
    In a circumferential clasp assembly, the retentive arm may extend into an undercut. The retentive arm is responsible for providing retention to the removable partial denture by engaging an undercut on the abutment tooth. The bracing arm, on the other hand, is responsible for providing stability and support to the denture. Therefore, the retentive arm is the correct answer as it is the arm that extends into the undercut.

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  • 21. 

    21. Which of the following steps is done LAST ?:

    • A.

      Rest preparatio

    • B.

      Framework try in

    • C.

      Centric relation records

    • D.

      Altered cast impression

    Correct Answer
    C. Centric relation records
    Explanation
    The last step in the given list is "Centric relation records." This step is typically performed after the other steps mentioned. Rest preparation, framework try-in, and altered cast impression are all steps that are typically done before taking centric relation records. Therefore, centric relation records are the final step in this sequence of procedures.

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  • 22. 

    22. Direct retainer (clasps):

    • A.

      Help stabilize the RPD by controlling occlusal  movement

    • B.

      Help stabilize the RPD by controlling gingival movement

    • C.

      May also function as indirect retainers

    • D.

      Prevent excessive biting forces on the abutment

    Correct Answer
    A. Help stabilize the RPD by controlling occlusal  movement
    Explanation
    Clasps in a removable partial denture (RPD) help stabilize the RPD by controlling occlusal movement. They provide support and stability to the RPD by engaging undercuts on the abutment teeth, preventing the prosthesis from dislodging during functional movements such as biting and chewing. Clasps do not control gingival movement or prevent excessive biting forces on the abutment. They may also function as indirect retainers, providing additional stability to the RPD by resisting rotational forces.

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  • 23. 

    23. What are the indications for a linguo plate as a major connector for a mandibular RPD?:

    • A.

      Present high floor of the mouth and facially anterior teeth

    • B.

      Present high lingual frenum and buccally anterior teeth​​​​​​​

    • C.

      Present lingual tori and big tongue

    • D.

       High floor of the mouth, high lingual frenum, lingual tori

    Correct Answer
    D.  High floor of the mouth, high lingual frenum, lingual tori
    Explanation
    A linguo plate as a major connector for a mandibular RPD is indicated when the patient has a high floor of the mouth, a high lingual frenum, and lingual tori. These conditions can make it difficult to achieve proper retention and stability with other types of major connectors. The linguo plate can help distribute the forces evenly and provide better support for the removable partial denture.

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  • 24. 

    24. Incisal rests should generally not used on maxillary incisors Why?:

    • A.

      For mandibular class 4 kennedy only

    • B.

      For maxillary class 4 kennedy only

    • C.

      For maxillary and mandibular class 1 and 2 kennedy

    • D.

      Poor esthetics and interferences with opposing occlusion

    Correct Answer
    D. Poor esthetics and interferences with opposing occlusion
    Explanation
    The correct answer is poor esthetics and interferences with opposing occlusion. Incisal rests are not commonly used on maxillary incisors because they can negatively affect the appearance of the teeth, leading to poor esthetics. Additionally, they can interfere with the opposing occlusion, causing discomfort and potential damage to the teeth. However, incisal rests may be used on mandibular incisors in Kennedy Class 4 cases, where there are no posterior teeth for support.

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  • 25. 

    25. Component of a clasp assembly are:

    • A.

      One rest, a retentive arm , a  bracing or reciprocating element, one minor connector

    • B.

      One or two rests, a retentive arm, a bracing or reciprocating element, one  minor connectors, one major connector

    • C.

      One minor connector, one major connector, one rest, two rests, one retentive arm, one bracing arm

    • D.

      Two minor connectors, one major connector , one rest, one retentive arm, one bracing or reciprocating element

    Correct Answer
    B. One or two rests, a retentive arm, a bracing or reciprocating element, one  minor connectors, one major connector
    Explanation
    The correct answer is "One or two rests, a retentive arm, a bracing or reciprocating element, one minor connectors, one major connector". This answer is correct because it includes all the necessary components of a clasp assembly: one or two rests, a retentive arm, a bracing or reciprocating element, one minor connector, and one major connector.

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  • 26. 

    26. The basic philosophy of dental treatment for a partially edentulous patient:

    • A.

      Preserve what remains and restore what is missing

    • B.

      Replace the missing teeth

    • C.

      Improve the path of insertion

    • D.

      Reshape rotated teeth

    Correct Answer
    A. Preserve what remains and restore what is missing
    Explanation
    The basic philosophy of dental treatment for a partially edentulous patient is to preserve what remains and restore what is missing. This means that the dentist aims to conserve and protect the existing teeth as much as possible, while also addressing the areas where teeth are missing by providing appropriate restorations or replacements. This approach helps maintain the overall oral health and function of the patient, while also improving their aesthetics and quality of life.

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  • 27. 

    27. Full palatal plate:

    • A.

      Minimum tissue support

    • B.

      Connector of choice in short distal extension cases

    • C.

      Six or more anterior teeth remain

    • D.

      Six or less anterior teeth remain

    • E.

      Maximum tissue support , connector long distal extension cases, six or less anterior teeth remain

    Correct Answer
    E. Maximum tissue support , connector long distal extension cases, six or less anterior teeth remain
    Explanation
    The full palatal plate provides maximum tissue support and is the connector of choice in long distal extension cases. It is recommended when there are six or less anterior teeth remaining.

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  • 28. 

    28. Physiologic Rest is a position of vertical dimension which can be recorded with

    • A.

      Centric relation

    • B.

      Centric occlusion or MIP

    • C.

      Edge to edge incisor contact

    • D.

      Posselt’s envelope

    Correct Answer
    D. Posselt’s envelope
    Explanation
    Posselt's envelope is a term used in dentistry to describe the path of movement of the mandible (lower jaw) in relation to the maxilla (upper jaw) during various functional movements such as chewing and speaking. It is a three-dimensional envelope that represents the maximum range of mandibular movement. Physiologic rest refers to the position of the mandible when it is at rest, which is within the limits of Posselt's envelope. Therefore, Posselt's envelope can be used to record the position of physiologic rest.

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  • 29. 

    29. A jaw which is moving in a ”left or right” motion would be called what type of movement

    • A.

      Lateral pure hinge

    • B.

      Lateral protrusion

    • C.

      Lateral

    • D.

      Horizontally protrusive

    Correct Answer
    C. Lateral
    Explanation
    A jaw which is moving in a "left or right" motion would be called lateral movement.

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  • 30. 

    30. The condyle on the working side is called the working condyle, which is also known as the:

    • A.

      Orbiting condyle

    • B.

      Balancing condyle

    • C.

      Rotating condyle

    • D.

      Translatory condyle

    Correct Answer
    C. Rotating condyle
    Explanation
    The condyle on the working side is referred to as the rotating condyle. This term is used to describe the movement of the condyle during jaw movement, as it rotates within the temporomandibular joint. The other options, such as orbiting condyle, balancing condyle, and translatory condyle, do not accurately describe the specific movement of the condyle on the working side.

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  • 31. 

    31. Considering the design of an RPD for the mandibular arch…:

    • A.

      Survey crowns should be done to correct the mesial tilt of the molar

    • B.

      Retentive clasps are required next to each edentulous space

    • C.

      The lingual plate would be the major connector of space

    • D.

      Dual path of insertion should be considered

    Correct Answer
    D. Dual path of insertion should be considered
    Explanation
    Dual path of insertion should be considered when designing an RPD for the mandibular arch because it allows for easier insertion and removal of the prosthesis. This is especially important in cases where there are limited interocclusal space or undercuts in the abutment teeth. By incorporating a dual path of insertion, the RPD can be inserted and removed in a more comfortable and efficient manner for the patient.

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  • 32. 

    32. Which one of the following Kennedy classes of RPD, never has an axis of rotation?:

    • A.

      Class I of Kennedy

    • B.

      Class II of Kennedy

    • C.

      Class III of Kennedy

    • D.

      Class IV of Kennedy

    Correct Answer
    C. Class III of Kennedy
    Explanation
    Class III of Kennedy is the correct answer because it is the only class that never has an axis of rotation. In class I, there is an axis of rotation around a single tooth or edentulous area. In class II, there is an axis of rotation around a single tooth or edentulous area and a second axis of rotation around a second tooth or edentulous area. In class IV, there is an axis of rotation around two teeth or edentulous areas. However, in class III, there is no axis of rotation, as there are no teeth or edentulous areas to serve as a pivot point.

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  • 33. 

    33. A class I modification 0 of RPD normally are have many clasps?:

    • A.

      1 clasp

    • B.

      2 clasps

    • C.

      3 clasps

    • D.

      4 clasps

    Correct Answer
    B. 2 clasps
    Explanation
    A class I modification 0 of RPD typically has two clasps.

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  • 34. 

    34. Cleaning a removable partial denture in sodium hypochlorite may result in:

    • A.

      Increased caries activity

    • B.

      Increased periodontal problems

    • C.

      Whitening acrylic resin and artificial teeth

    • D.

      Corrosion of the metal the framework

    Correct Answer
    D. Corrosion of the metal the framework
    Explanation
    Cleaning a removable partial denture in sodium hypochlorite may result in corrosion of the metal framework. Sodium hypochlorite is a strong oxidizing agent that can react with metal, causing it to corrode. This can lead to damage and weakening of the metal framework, compromising the stability and functionality of the denture. It is important to use appropriate cleaning agents and methods to maintain the longevity and integrity of the denture.

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  • 35. 

    35. During biting a maxillary class I RPD with rotate around a line determined by the rigid metal above the survey line and closed to the extension areas This line is called:

    • A.

      Dual path line

    • B.

      Frankfurt line

    • C.

      Camper’s line

    • D.

      Axis of rotation

    Correct Answer
    D. Axis of rotation
    Explanation
    The axis of rotation refers to the line around which a maxillary class I RPD rotates during biting. It is determined by the rigid metal above the survey line and is located close to the extension areas. This axis allows for proper movement and stability of the RPD during function.

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  • 36. 

    36. Mandibular gridwork design of minor connectors:

    • A.

      Maximum bulk of the acrylic resin

    • B.

      Prevents thin, edges fracturing

    • C.

      Extend fully to the hamular notch

    • D.

      Extend 2/3 of the way from abutment tooth to retromolar pad

    Correct Answer
    D. Extend 2/3 of the way from abutment tooth to retromolar pad
    Explanation
    The mandibular gridwork design of minor connectors should extend 2/3 of the way from the abutment tooth to the retromolar pad. This design allows for proper support and stability of the prosthesis while also ensuring that there is enough flexibility to prevent fracture of the acrylic resin. Extending the minor connector fully to the hamular notch may cause discomfort and impingement on the soft tissues in the area.

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  • 37. 

    37. The correct answer the  basic movements of the mandible:

    • A.

      Hinge, chewing and yawing

    • B.

      Translatory movements relative to centric relation

    • C.

      Lateral, dimension, excursion

    • D.

      Hinge , lateral and translatory movement

    Correct Answer
    D. Hinge , lateral and translatory movement
    Explanation
    The correct answer is "Hinge, lateral and translatory movement." The mandible, or lower jaw, has several basic movements. The hinge movement refers to the opening and closing of the jaw, like a hinge on a door. Lateral movement refers to the side-to-side movement of the jaw, allowing for chewing and grinding of food. Translatory movement refers to the forward and backward movement of the jaw, which helps with actions like speaking and swallowing. Together, these three movements allow for the full range of motion of the mandible.

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  • 38. 

    38. A mandibular movement which is<< either opening or closing motions of the mandible around a horizontal axis that is common to both condyles >> would be best classified as a…………movement:

    • A.

      Translatory excursion

    • B.

      Centric relation

    • C.

      Lateral

    • D.

      Hinge

    Correct Answer
    D. Hinge
    Explanation
    A mandibular movement that involves either opening or closing motions of the mandible around a horizontal axis that is common to both condyles is best classified as a hinge movement. In a hinge movement, the mandible acts like a hinge, allowing the jaw to open and close in a swinging motion around a fixed axis. This type of movement is different from translatory excursion, which involves a sliding motion of the mandible, and centric relation, which refers to the position of the mandible when the teeth are in maximum intercuspation.

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  • 39. 

    39. Protrusive or  Retrusive movements can also be called………………movement:

    • A.

      Translatory or vertical

    • B.

      Translatory or shifting

    • C.

      Translatory or sliding

    • D.

      Sliding crossbite excursions

    Correct Answer
    C. Translatory or sliding
    Explanation
    Protrusive or Retrusive movements refer to the forward or backward sliding of the mandible (lower jaw) in relation to the maxilla (upper jaw). These movements can also be called translatory or sliding movements.

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  • 40. 

    40. When the survey line is height on the Mesial or Distal but low on the center, which one design clasp:

    • A.

       I  clasp

    • B.

      Y clasp

    • C.

      T clasp

    • D.

       U clasp

    Correct Answer
    B. Y clasp
    Explanation
    When the survey line is high on the Mesial or Distal but low on the center, a Y clasp is designed. This is because a Y clasp allows for greater flexibility and adaptability in engaging the undercut areas of the teeth, especially when the survey line is not at the same level throughout. The Y clasp can provide adequate retention and stability in such cases.

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  • 41. 

    41. More acceptable esthetically and less caries formation for bar clasp is:

    • A.

      Y clasp

    • B.

      I clasp

    • C.

      T clasp

    • D.

      U clasp

    Correct Answer
    B. I clasp
    Explanation
    The I clasp is more aesthetically acceptable and causes less caries formation compared to other types of clasp designs. This is because the I clasp is designed to engage the undercut of the tooth in a more discreet manner, resulting in a more natural appearance. Additionally, the I clasp puts less pressure on the tooth, reducing the risk of caries formation.

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  • 42. 

    42. Best selection of preventing abutments tooth of class I Kennedy from the negative effects of the additional load applied to them is by:

    • A.

      Splinting abutment with adjacent teeth

    • B.

      Placing distal rests on the distal abutment

    • C.

      Keeping a light occlusion on the distal extensions

    • D.

      Regular relining of distal extensions

    Correct Answer
    C. Keeping a light occlusion on the distal extensions
    Explanation
    Keeping a light occlusion on the distal extensions is the best way to prevent the negative effects of additional load on class I Kennedy abutments. This means that the contact between the upper and lower teeth in the distal extension area should be minimal or light. This helps to distribute the load evenly and reduce the stress on the abutments. Splinting the abutment with adjacent teeth, placing distal rests on the distal abutment, and regular relining of distal extensions may not provide the same level of protection against the negative effects of additional load.

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  • 43. 

    43. When designing palatal connectors, relief should be given for:

    • A.

      Ridge area

    • B.

      Elevated mid suture line

    • C.

      Rugae area

    • D.

      Palatal torus

    Correct Answer
    D. Palatal torus
    Explanation
    When designing palatal connectors, relief should be given for the palatal torus. The palatal torus is a bony protuberance on the midline of the hard palate. It can vary in size and shape among individuals. Providing relief for the palatal torus ensures that the denture or appliance fits comfortably and does not cause any discomfort or pressure on the torus. This is important for the overall comfort and stability of the prosthesis.

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  • 44. 

    44. For the preparation of rest seat:

    • A.

      Marginal ridge should be reduced by 25 mm

    • B.

      Marginal ridge should be reduced by 1 mm

    • C.

      The outline to have greater length than width

    • D.

      The outline to have greater width than length

    Correct Answer
    B. Marginal ridge should be reduced by 1 mm
    Explanation
    The correct answer is that the marginal ridge should be reduced by 1 mm. This means that when preparing the rest seat, the marginal ridge of the tooth should be reduced by a total of 1 mm. This reduction helps create a proper fit for the restorative material or prosthesis that will be placed on the tooth.

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  • 45. 

    45. Which of the following chronic conditions may cause tooth abrasion?:

    • A.

      Pipe smoking

    • B.

       Occlusion trauma

    • C.

      Hard brush using and strong brushing

    • D.

      Strong mastication

    Correct Answer
    C. Hard brush using and strong brushing
    Explanation
    Hard brush using and strong brushing can cause tooth abrasion because the excessive force and friction can wear away the enamel on the teeth over time. This can lead to sensitivity, tooth decay, and gum recession. Pipe smoking, occlusion trauma, and strong mastication may have other oral health effects, but they are not directly related to tooth abrasion.

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  • 46. 

    46. Tripod of dental surveyor is the method used:

    • A.

      For giving clasp assemblies at 3 points

    • B.

      Determine the undercut areas on the tooth

    • C.

      Surveyor to have reproducible position of the cast on the surveyor

    • D.

      Surveyor for recording the relation of the cast to the surveyor

    Correct Answer
    D. Surveyor for recording the relation of the cast to the surveyor
    Explanation
    The tripod of dental surveyor is used for recording the relation of the cast to the surveyor. This means that the surveyor is used to measure and record the position of the cast in relation to the surveyor. This is important for ensuring accurate and reproducible measurements and for determining the proper positioning of clasp assemblies and identifying undercut areas on the tooth. The tripod method provides stability and consistency in recording these measurements.

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  • 47. 

    47. What are the typical positions of the maxillary and mandibular teeth, and the tongue during empty mouth swallowing?:

    • A.

      Centric occlusion, the tongue touches the palate

    • B.

      Occlusion, the tongue touches the lingual aspects of the anterior teeth

    • C.

      Retruded contact, the tongue touches the palate

    • D.

      Retruded contact, the tongue touches the lingual aspects of the anterior teeth

    Correct Answer
    A. Centric occlusion, the tongue touches the palate
    Explanation
    During empty mouth swallowing, the typical position of the maxillary and mandibular teeth is in centric occlusion, which means that they are in their normal biting position. In this position, the tongue touches the palate, providing support and stability during the swallowing process.

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  • 48. 

    48. Mesh type of grid work minor connectors is:

    • A.

      Potentially superior retention

    • B.

      Interferes with setting of teeth

    • C.

      Struts are too thick

    • D.

      Potentially more rigid

    Correct Answer
    A. Potentially superior retention
    Explanation
    The mesh type of grid work minor connectors potentially provide superior retention. This means that they are designed to securely hold the prosthesis in place, preventing it from moving or becoming loose. This type of connector is likely to offer a more secure fit compared to other options.

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  • 49. 

    49. Lattice type of grid work minor connectors is:

    • A.

      Flatter

    • B.

      Potentially more rigid

    • C.

      Less retention for acrylic resin

    • D.

      Potentially superior retention

    Correct Answer
    B. Potentially more rigid
    Explanation
    The correct answer is "Potentially more rigid." This means that lattice type of grid work minor connectors have the potential to be more rigid compared to other options. This suggests that these connectors may provide better stability and support for the dental prosthesis.

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  • 50. 

    50.The kennedy classification of this RPD is:

    • A.

      Class IV mod II

    • B.

      Class II mod I

    • C.

      Class I mod II

    • D.

      Class I mod I

    Correct Answer
    D. Class I mod I
    Explanation
    The Kennedy classification system is used to classify removable partial dentures (RPDs) based on the edentulous areas in the dental arch. Class I mod I refers to a situation where there is bilateral edentulous areas posterior to the remaining natural teeth. In this case, the RPD design would involve a major connector that connects the bilateral edentulous areas and minor connectors connecting the remaining natural teeth. Therefore, the correct answer is Class I mod I.

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Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Feb 13, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 04, 2020
    Quiz Created by
    Deap Monypov

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