Partial Denture ( Dr. Sokly) I

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  • 1/203 Questions

    1. A clasp most common use is?:

    • Ring clasp
    • Back action clasp
    • Aker clasp
    • Embrasure
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About This Quiz

This quiz, titled 'Partial Denture (Dr. Sokly) I', covers essential topics in partial dentures, including clasp types, movements of the mandible, and major connectors. It assesses key skills in prosthodontics, crucial for dental professionals and students.

Partial Denture ( Dr. Sokly) I - Quiz

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  • 2. 

    10. Functions of a Major connector:

    • Component of RPD connect to acrylic resin

    • Kind of metal chrome cobalt

    • Functions as one unit

    • Unification, stress distribution, cross arch stabilization

    Correct Answer
    A. 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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  • 3. 

    11. Requirements of a Major connector:

    • Connects various parts

    • Distributes functional loads to both teeth and mucosa

    • Partial denture acts as one unit

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

    Correct Answer
    A. 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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  • 4. 

    13. The internal finish line is:

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

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

    • A type of posterior palatal seal

    • 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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  • 5. 

    17. Occlusal rest preparation should be:

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

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

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

    • 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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  • 6. 

    27. Full palatal plate:

    • Minimum tissue support

    • Connector of choice in short distal extension cases

    • Six or more anterior teeth remain

    • Six or less anterior teeth remain

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

    Correct Answer
    A. 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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  • 7. 

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

    • Increased caries activity

    • Increased periodontal problems

    • Whitening acrylic resin and artificial teeth

    • Corrosion of the metal the framework

    Correct Answer
    A. 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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  • 8. 

    36. Mandibular gridwork design of minor connectors:

    • Maximum bulk of the acrylic resin

    • Prevents thin, edges fracturing

    • Extend fully to the hamular notch

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

    Correct Answer
    A. 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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  • 9. 

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

    • Ridge area

    • Elevated mid suture line

    • Rugae area

    • Palatal torus

    Correct Answer
    A. 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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  • 10. 

    68. A clasp assembly should:

    • Have a retentive arm with adequate length and taper for flexibility

    • Have a retentive arm that terminates in an undercut

    • Have elements that considered together provide 180 degree encirclement

    • All are correct

    Correct Answer
    A. All are correct
    Explanation
    The clasp assembly should have a retentive arm with adequate length and taper for flexibility, which allows it to adapt to different tooth shapes and provide a secure grip. It should also have a retentive arm that terminates in an undercut, which helps to prevent the clasp from dislodging. Additionally, the clasp assembly should have elements that, when considered together, provide 180 degree encirclement, ensuring stability and retention of the prosthesis. All of these characteristics are important for an effective and functional clasp assembly.

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  • 11. 

    70. Function of the teeth is /are:

    • Mastication

    • Phonation

    • Esthetic

    • All are correct

    Correct Answer
    A. All are correct
    Explanation
    The teeth have multiple functions, including mastication (chewing and grinding food), phonation (producing speech sounds), and esthetics (enhancing appearance). All of these functions are correct and contribute to the overall role of teeth in the oral cavity.

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  • 12. 

    73. An ideal design a major connector should possess the following qualities:

    •  Unification

    • Stress distribution

    • Cross Arch stabilization

    • Rigidity

    • All are correct

    Correct Answer
    A. All are correct
    Explanation
    An ideal design for a major connector should possess the qualities of unification, stress distribution, cross arch stabilization, and rigidity. Unification ensures that the different components of the major connector are integrated and work together effectively. Stress distribution ensures that the forces exerted on the major connector are evenly distributed to prevent any localized areas of weakness. Cross arch stabilization helps to stabilize the denture by engaging multiple teeth on different arches. Rigidity ensures that the major connector is strong and durable. Therefore, all of these qualities are important and correct for an ideal design of a major connector.

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  • 13. 

    76. The function of the guide plate is to: 

    • Help establish a definitive path of insertion/ dislodgement

    • Stabilize the RPD by controlling its horizontal position

    • Provide contact with the adjacent tooth

    • All are correct

    Correct Answer
    A. All are correct
    Explanation
    The guide plate serves multiple functions. Firstly, it helps establish a definitive path of insertion and dislodgement, ensuring that the removable partial denture (RPD) can be easily inserted and removed. Secondly, it stabilizes the RPD by controlling its horizontal position, preventing excessive movement and improving comfort for the patient. Lastly, the guide plate provides contact with the adjacent tooth, promoting stability and preventing displacement of the RPD during function. Therefore, all of the given options are correct explanations of the function of the guide plate.

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  • 14. 

    82. A removable partial denture may be:  

    • All tooth supported

    • Tooth and tissue supported

    • All tooth supported and tissue supported

    • All tissue supported

    Correct Answer
    A. All tooth supported and tissue supported
    Explanation
    A removable partial denture can be both tooth supported and tissue supported. This means that the denture is supported by both the remaining natural teeth and the surrounding tissues in the oral cavity. The denture is designed to fit around the existing teeth and also rest on the gums and other soft tissues. This combination of support provides stability and retention for the denture, allowing the patient to chew and speak comfortably.

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  • 15. 

    83. Following condition(s) is/are also called as distal extension partial denture:

    • Kennedy’s class IV

    • Applegate class VI

    • Kennedy’s class I

    •    Applegate class V

    Correct Answer
    A. Kennedy’s class I
    Explanation
    Kennedy's class I is also known as a distal extension partial denture. This type of partial denture is used when there are missing teeth at the posterior end of the dental arch, and the remaining teeth are healthy and can provide support for the denture. Kennedy's classification system categorizes partial dentures based on the edentulous areas and the remaining teeth involved. Class I specifically refers to cases where there are missing teeth at the posterior end of one arch and the anterior teeth are intact.

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  • 16. 

    84. Floor of the rest seat should be:

    • Convex

    • Concave

    • Flat

    • Spoon shaped

    Correct Answer
    A. Spoon shaped
    Explanation
    The floor of the rest seat should be spoon-shaped. This means that the surface should be curved and concave, resembling the shape of a spoon. This design helps to provide better support and stability for the person sitting on the rest seat. The concave shape allows for a more comfortable and secure seating position, preventing the person from sliding or losing balance. It also helps to distribute the weight evenly, reducing pressure points and potential discomfort.

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  • 17. 

    92. When designing palatal major connectors ,relief should for:

    • Palatal torus

    • Ridge area

    • Elevated mid suture line

    • Rugae areas

    Correct Answer
    A. Palatal torus
    Explanation
    When designing palatal major connectors, relief should be provided for the palatal torus. The palatal torus is a bony protuberance on the midline of the hard palate, and it can cause discomfort or irritation if not properly accommodated in the design of the major connector. Providing relief for the palatal torus ensures a more comfortable fit and better stability for the prosthesis.

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  • 18. 

    98. Stability is mainly against:

    • Horizontal forces

    • Functional forces

    • Horizontal forces and functional forces

    • Forces against removal of prosthesis

    Correct Answer
    A. Horizontal forces and functional forces
    Explanation
    Stability in this context refers to the ability of a prosthesis to remain in place and resist movement. Horizontal forces refer to forces that act parallel to the ground, while functional forces are the forces exerted during activities such as walking or chewing. Therefore, stability is mainly against both horizontal forces (which can cause the prosthesis to slide or move horizontally) and functional forces (which can cause the prosthesis to shift or rotate during activities).

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  • 19. 

    124. When rest seals are prepared at inter proximal area on two adjacent teeth:

    • It should extend for lingually

    • They avoid wedging by the framework

    • They do not shunt food

    • It should extend for lingually and They avoid wedging by the framework

    Correct Answer
    A. It should extend for lingually and They avoid wedging by the framework
    Explanation
    When rest seals are prepared at the interproximal area on two adjacent teeth, they should extend lingually. This means that the seal should cover the area towards the tongue side of the teeth. This helps to prevent food from getting stuck between the teeth and causing decay. Additionally, the rest seals also avoid wedging by the framework, which means that they prevent any pressure or force that could potentially cause damage to the adjacent teeth.

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  • 20. 

    162. Lattice pattern is preferable for mesh pattern of minor connector to connect denture base to major connector because:

    • It gives excellent attachment

    • Gives bulk to the minor connector

    • It gives excellent attachment and Gives bulk to the minor connector

    • It gives excellent attachment while minimizing warping resin bases

    Correct Answer
    A. It gives excellent attachment while minimizing warping resin bases
    Explanation
    The lattice pattern is preferable for the mesh pattern of a minor connector because it provides excellent attachment while minimizing warping in resin bases. This means that the lattice pattern allows for a strong and secure connection between the denture base and major connector, while also reducing the risk of distortion or damage to the resin material. This ensures a more stable and durable denture construction.

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  • 21. 

    187. Functions of guiding planes are:

    • Ensuring definite path of placement

    • Ensure predictable clasp retention

    • Ensuring definite path of placement and Ensure predictable clasp retention

    • They make all the teeth parallel to each other

    Correct Answer
    A. Ensuring definite path of placement and Ensure predictable clasp retention
    Explanation
    Guiding planes in dentistry serve two main functions. First, they ensure a definite path of placement for removable partial dentures. This means that the guiding planes help guide the prosthesis into its proper position, ensuring a secure and comfortable fit. Second, guiding planes also ensure predictable clasp retention. The clasp is a component of the partial denture that helps hold it in place, and the guiding planes help ensure that the clasp engages properly and provides adequate retention. Therefore, the correct answer is that guiding planes serve both functions of ensuring a definite path of placement and predictable clasp retention.

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  • 22. 

    188. Clasp retention is:

    • Perpendicular to path of placement

    • Resistance of metal to deformation

    • Perpendicular to path of placement and Resistance of metal to deformation

    • Tight holding of tooth by the clasps

    Correct Answer
    A. Perpendicular to path of placement and Resistance of metal to deformation
    Explanation
    Clasp retention refers to the ability of a clasp to resist deformation and hold a tooth tightly in place. It is important for the clasp to be resistant to deformation in order to provide stable support for the tooth. Additionally, the clasp should be perpendicular to the path of placement to ensure proper engagement and retention of the tooth. Therefore, the correct answer is "Perpendicular to path of placement and Resistance of metal to deformation".

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  • 23. 

    189. When anterior teeth are to be replaced, the best path of placement that can be  selected is:

    • Right lateral

    • Vertical

    • Horizontal

    • Antero-posterior

    Correct Answer
    A. Vertical
    Explanation
    When anterior teeth are to be replaced, the best path of placement that can be selected is vertical. This is because the vertical path allows for proper alignment and positioning of the replacement teeth with the adjacent natural teeth. It ensures a harmonious and natural-looking smile, as well as optimal functionality and stability of the prosthetic teeth. Horizontal or antero-posterior paths may result in misalignment, improper occlusion, and compromised aesthetics and function. Right lateral path may also lead to asymmetry and an unnatural appearance. Therefore, vertical path is considered the most suitable for replacing anterior teeth.

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  • 24. 

    193. Kennedy classification is determined by:

    • The most anterior tooth missing

    • The first tooth to be lost

    • The largest tooth in the space

    • The most posterior tooth missing

    Correct Answer
    A. The most posterior tooth missing
    Explanation
    The Kennedy classification is determined by identifying the most posterior tooth that is missing in the dental arch. This classification system is used to categorize partial edentulism, which refers to the condition where a patient is missing some, but not all, of their teeth. By determining which tooth is missing at the back of the arch, dentists can classify the specific type of partial edentulism and plan appropriate treatment options.

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  • 25. 

    4. The basic movement of mandible:

    • Hinge movement

    • Translatory movement

    • Lateral movement

    • Hinge ,lateral and translatory movement

    Correct Answer
    A. 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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  • 26. 

    106. A removable partial denture may be :  

    • All tooth support supported

    • Tooth and tissue supported

    • All tooth support supported and tooth and tissue supported

    • All tissue supported

    Correct Answer
    A. All tooth support supported and tooth and tissue supported
    Explanation
    A removable partial denture may be supported by all teeth or a combination of teeth and tissue. This means that it can be designed to rest on and be supported by the remaining natural teeth in the mouth, as well as the surrounding tissues such as the gums and bone. This type of denture provides stability and support to the remaining teeth and helps restore the function and aesthetics of the missing teeth.

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  • 27. 

    147. Undercut at the point of origin of a clasp can be approached by:

    • Embrasure clasp

    • Back action clasp

    • Hair pin clasp

    • Half and half clasp

    Correct Answer
    A. Hair pin clasp
    Explanation
    The hair pin clasp can approach an undercut at the point of origin of a clasp.

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  • 28. 

    177. Designing of a prosthesis requires following consideration:

    • Biological

    • Mechanical

    • Esthetic

    • Are all corrected

    Correct Answer
    A. Are all corrected
    Explanation
    The designing of a prosthesis requires consideration of biological factors, such as ensuring compatibility with the patient's body and promoting proper function. Mechanical factors are also important to ensure the prosthesis is durable and can withstand the necessary forces. Esthetic considerations are necessary to create a prosthesis that closely resembles the natural body part, helping the patient feel more comfortable and confident. Therefore, all three considerations - biological, mechanical, and esthetic - must be taken into account when designing a prosthesis.

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  • 29. 

    197. A removable partial denture may be:

    •  All tooth supported

    •   Tooth and tissues supported

    •   All tooth supported  and tissues supported

    •   All tissues supported

    Correct Answer
    A.   All tooth supported  and tissues supported
    Explanation
    A removable partial denture can be supported by both teeth and tissues. This means that it can rely on the remaining natural teeth for support and stability, as well as utilizing the underlying oral tissues for additional support. This type of denture is commonly used when there are some remaining teeth present in the mouth, but not enough to support a full denture. The combination of tooth and tissue support allows for a more secure and comfortable fit.

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  • 30. 

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

    • Anterior posterior palatal strap

    • Palatal plate

    • Horse –shoe

    • Modified palatal strap

    Correct Answer
    A. 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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  • 31. 

    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:

    • At the hamular notch

    • In the glenoid fossa

    • Opposite the buccal pouch

    • 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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  • 32. 

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

    • Preserve what remains and restore what is missing

    • Replace the missing teeth

    • Improve the path of insertion

    • 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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  • 33. 

    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:

    • Dual path line

    • Frankfurt line

    • Camper’s line

    • Axis of rotation

    Correct Answer
    A. 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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  • 34. 

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

    • Hinge, chewing and yawing

    • Translatory movements relative to centric relation

    • Lateral, dimension, excursion

    • Hinge , lateral and translatory movement

    Correct Answer
    A. 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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  • 35. 

    66. Incisal rests:

    • A generally more positive vertical stops than cingulum rests

    • May interfere with the opposing occlusion

    • Should not be used on maxillary incisors

    • All are correct

    Correct Answer
    A. All are correct
    Explanation
    The statement "All are correct" means that all of the previous statements about incisal rests are true. This includes the fact that incisal rests generally have a more positive vertical stop than cingulum rests, they may interfere with the opposing occlusion, and they should not be used on maxillary incisors.

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  • 36. 

    72. An ideal design framework of RPD should be:

    • Determine the path of insertion

    •   As guiding planes

    • Locate retention areas

    • Locate the height of contour

    • All are correct     

    Correct Answer
    A. All are correct     
    Explanation
    The design framework of a removable partial denture (RPD) should include determining the path of insertion, as well as locating guiding planes, retention areas, and the height of contour. All of these factors are important in ensuring the RPD fits properly and functions effectively within the oral cavity. Determining the path of insertion helps to establish the correct direction in which the RPD should be placed and removed. Guiding planes provide stability and support for the RPD, while retention areas help to keep the prosthesis securely in place. Locating the height of contour ensures that the RPD is properly contoured to match the natural teeth and surrounding tissues. Therefore, all of these factors are correct and should be considered in the design framework of an RPD.

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  • 37. 

    74. The diagnosis of master cast of RPD be for design framework should be:

    • Determine path of insertion

    • Determine high of contour

    • Determine parallelism of abutments

    • Determine guiding planes

    • All are correct

    Correct Answer
    A. All are correct
    Explanation
    The diagnosis of the master cast of a removable partial denture (RPD) for design framework should include determining the path of insertion, the height of contour, the parallelism of abutments, and the guiding planes. All of these factors are important in ensuring a properly fitting and functioning RPD. The path of insertion determines the direction in which the RPD can be placed and removed from the mouth. The height of contour helps in achieving proper retention and stability. The parallelism of abutments ensures equal distribution of forces. The guiding planes aid in guiding the RPD into place. Therefore, all of these factors are correct in the diagnosis of the master cast for RPD design framework.

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  • 38. 

    87. Parts that offer support for removable partial denture are following: 

    • Rest and reciprocal arm

    • Rest and retentive arm

    •  Rest and denture base

    • Rest and minor connector

    Correct Answer
    A.  Rest and denture base
    Explanation
    The parts that offer support for a removable partial denture are the rest and the denture base. The rest provides support and stability for the denture, while the denture base is the part of the denture that rests on the oral tissues and provides support for the artificial teeth. The other options, such as the reciprocal arm, retentive arm, and minor connector, are not specifically involved in offering support for the denture.

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  • 39. 

    94. The superior border of linqual bar should be:

    • Deep in the linqual sulcus

    • At least 4 mm below the gingival margin

    • At the cingulum of anterior teeth

    • At least 7 mm below the gingival margin

    Correct Answer
    A. At least 4 mm below the gingival margin
    Explanation
    The superior border of the lingual bar should be at least 4 mm below the gingival margin. This is because the lingual bar is a component of a removable partial denture that rests on the lingual surfaces of the teeth. Placing the superior border at least 4 mm below the gingival margin ensures that there is enough clearance between the lingual bar and the gingiva, preventing any irritation or trauma to the soft tissues.

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  • 40. 

    113. Bulkiest position of a proximal minor connector is towards its:

    • Buccal side

    • Centre

    • Lingual side

    • Inferior

    Correct Answer
    A. Lingual side
    Explanation
    The bulkiest position of a proximal minor connector is towards its lingual side. This means that the connector is thicker or larger on the lingual side compared to the other sides. This is important because the lingual side of the connector is in contact with the lingual gingiva or tongue, and it needs to provide adequate support and stability for the prosthesis. By making the lingual side bulkier, it ensures that the connector can withstand the forces and pressures exerted during normal oral function.

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  • 41. 

    115. Minor connector for mandibular distal extension will extend unto:

    • One-third the length of edentulous ridge

    • Two-third the length of edentulous ridge

    • Entire length of edentulous ridge

    • Half the length of edentulous ridge

    Correct Answer
    A. Two-third the length of edentulous ridge
    Explanation
    The minor connector for a mandibular distal extension will extend two-thirds the length of the edentulous ridge. This means that the connector will reach approximately two-thirds of the distance from the distal extension base to the most posterior edentulous area. This allows for proper support and stability of the removable partial denture in the mouth.

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  • 42. 

    133. Floor of the cingulum rest seats is placed towards:

    • Mesial axial wall

    • Distal axial wall

    • Cervical end

    • Incisal end

    Correct Answer
    A. Cervical end
    Explanation
    The floor of the cingulum rest seats is placed towards the cervical end. This is because the cingulum rest seats are designed to provide stability and support for the denture, and placing them towards the cervical end helps distribute the forces evenly and prevent displacement of the denture during function. Placing the rest seats towards the cervical end also allows for better esthetics and natural appearance of the denture.

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  • 43. 

    139. Parts that offer support for RPD are following:

    • Rest and reciprocal arm

    • Rest and retentive arm

    • Rest and denture base

    • Rest and minor connector

    Correct Answer
    A. Rest and denture base
    Explanation
    The parts that offer support for a removable partial denture (RPD) are the rest and denture base. The rest is a component that rests on the tooth and provides stability and support for the RPD. The denture base is the part of the RPD that rests on the edentulous ridge and provides support and stability for the prosthesis. Together, the rest and denture base work in harmony to offer the necessary support for the RPD.

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  • 44. 

    178. Rotation in a distal extension denture base occurs because of differences in displaceability of:

    • Periodontal ligament

    • Supporting abutment teeth

    • Soft tissue of residual ridge

    • Are all corrected

    Correct Answer
    A. Are all corrected
    Explanation
    The rotation in a distal extension denture base occurs due to differences in displaceability of the periodontal ligament, supporting abutment teeth, and soft tissue of the residual ridge. Therefore, all of these factors need to be corrected in order to prevent rotation and ensure proper fit and function of the denture.

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  • 45. 

    196. In general, lingual plating should be supported:

    •  By the inclined surfaces of the mandibular incisors

    •  With minor connectors

    •  With bracing arms

    •   With rests

    Correct Answer
    A.   With rests
    Explanation
    Lingual plating should be supported with rests because rests help in preventing the movement of the denture and provide stability. They also distribute the occlusal forces evenly and reduce the load on the abutment teeth. Rests are essential for proper support and retention of the lingual plate, ensuring the success and longevity of the denture.

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  • 46. 

    198. Following condition(s) is/are also called as distal extension partial denture:

    •   Kennedy class IV

    •    Kennedy class IV mod. I

    •    Kennedy class I

    •   Kennedy class I mod. I

    Correct Answer
    A.    Kennedy class I
    Explanation
    The Kennedy classification system is used to classify partial dentures based on the edentulous spaces and the remaining natural teeth in the arch. Kennedy class I refers to a partially edentulous arch with bilateral edentulous areas located posterior to the remaining natural teeth. This condition is also known as a distal extension partial denture because the denture extends distally (towards the back) beyond the last remaining natural teeth to replace the missing teeth in the posterior region.

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  • 47. 

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

    • For mandibular class 4 kennedy only

    • For maxillary class 4 kennedy only

    • For maxillary and mandibular class 1 and 2 kennedy

    • Poor esthetics and interferences with opposing occlusion

    Correct Answer
    A. 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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  • 48. 

    25. Component of a clasp assembly are:

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

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

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

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

    Correct Answer
    A. 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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  • 49. 

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

    • Class I of Kennedy

    • Class II of Kennedy

    • Class III of Kennedy

    • Class IV of Kennedy

    Correct Answer
    A. 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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Quiz Review Timeline (Updated): Feb 13, 2024 +

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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