Partial Denture ( Dr. Sokly) II
Questions and Answers
- 1.
204. All of the following clasps are infrabulge clasps except:
- A.
I bar
- B.
Modified T bar
- C.
Roach clasp
- D.
Aker clasp
Correct Answer
D. Aker claspExplanation
The correct answer is Aker clasp. Aker clasp is not an infrabulge clasp. Infrabulge clasps are designed to engage undercuts located below the height of contour of the tooth. I bar, Modified T bar, and Roach clasp are examples of infrabulge clasps.Rate this question:
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- 2.
205. A tissue undercut may preclude the selection of:
- A.
A suprabulge clasp
- B.
An infrabulge clasp
- C.
A half and half clasp
- D.
A combination clasp
Correct Answer
B. An infrabulge claspExplanation
A tissue undercut refers to an area where the soft tissues of the mouth are positioned below the height of contour of the tooth. This can make it difficult to place certain types of clasps on the tooth. An infrabulge clasp is designed to engage the undercut and provide stability and retention for a removable partial denture. Therefore, if there is already a tissue undercut present, using an infrabulge clasp may not be possible or effective.Rate this question:
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- 3.
206. The open lattice type on a maxillary class I Removable Partial Denture:
- A.
Covers the hamular notch
- B.
Covers the tuberosity
- C.
Does not cover the tuberosity
- D.
Does not require substantial inter arch space
Correct Answer
C. Does not cover the tuberosityExplanation
The open lattice type on a maxillary class I Removable Partial Denture does not cover the tuberosity. This type of denture design allows for better retention and stability by utilizing a framework that is not fully covered by acrylic. This design helps to minimize the bulk of the denture and allows for better distribution of forces during function. By not covering the tuberosity, the denture is able to engage the underlying bone and soft tissues more effectively, improving the overall fit and comfort for the patient.Rate this question:
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- 4.
207. Physiologic Rest in 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 envelopeExplanation
Posselt's envelope is a term used in dentistry to describe the path followed by the mandible during various functional movements, such as opening and closing of the mouth. It is a recording of the vertical dimension of the patient's rest position. In this context, the correct answer suggests that the physiologic rest position can be recorded using Posselt's envelope.Rate this question:
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- 5.
208. Use long guide plane on class IV kennedy for:
- A.
Retention denture base
- B.
Stabilization denture base
- C.
Path of insertion
- D.
Esthetic denture
Correct Answer
D. Esthetic dentureExplanation
The use of a long guide plane on a Class IV Kennedy is for esthetic denture purposes. A guide plane helps to guide the insertion and removal of the denture, ensuring proper alignment and fit. In the case of a Class IV Kennedy, which involves a bilateral edentulous area with no posterior abutments, the long guide plane helps to stabilize the denture and improve esthetics by providing additional support and retention. This is important in ensuring a natural and pleasing appearance of the denture.Rate this question:
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- 6.
209. Retentive tip of a clasp should usually be designed to be placed in:
- A.
The occlusal 1/3
- B.
The gingival 1/3
- C.
The occlusal 2/3
- D.
The gingival 2/3
Correct Answer
B. The gingival 1/3Explanation
The retentive tip of a clasp should usually be designed to be placed in the gingival 1/3 of the tooth. This is because the gingival 1/3 of the tooth provides better retention and stability for the clasp compared to the occlusal 1/3. Placing the retentive tip in the gingival 1/3 also helps to distribute the forces evenly along the tooth and minimize any potential damage or discomfort to the patient.Rate this question:
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- 7.
210. Height of contour determine is a:
- A.
Path of insertion
- B.
Placed of clasp
- C.
Proximal plate
- D.
Infrabulge and suprabulge
Correct Answer
D. Infrabulge and suprabulgeExplanation
The height of contour determines the location of the infrabulge and suprabulge areas on a dental restoration. The infrabulge is the area below the height of contour, while the suprabulge is the area above it. These areas play a crucial role in providing proper retention and stability to the restoration. By determining the height of contour, the dentist can accurately place the infrabulge and suprabulge, ensuring optimal function and aesthetics of the restoration.Rate this question:
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- 8.
211. Reciprocal clasp arm of RPD should be:
- A.
Horizontal force
- B.
Vertical force
- C.
Direct contact
- D.
Lied above high of contour
Correct Answer
D. Lied above high of contourExplanation
The reciprocal clasp arm of a removable partial denture (RPD) should lie above the height of contour. This is because the height of contour is the area of greatest convexity on the abutment tooth, and placing the clasp arm above this point ensures that it engages the tooth in a stable manner. By lying above the height of contour, the clasp arm can provide adequate retention and stability to the RPD, allowing it to function properly and prevent dislodgement during mastication and other oral activities.Rate this question:
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- 9.
212. What is the most common use material for casting framework of RPD:
- A.
Platinum
- B.
Titanium
- C.
Nickel chrome
- D.
Chrome cobalt
Correct Answer
D. Chrome cobaltExplanation
Chrome cobalt is the most common material used for casting the framework of removable partial dentures (RPD). This is because chrome cobalt alloys offer a combination of strength, durability, and biocompatibility. They are resistant to corrosion and wear, making them suitable for long-term use in the oral cavity. Additionally, chrome cobalt alloys can be easily cast and adjusted to fit the patient's mouth comfortably. Overall, chrome cobalt is the preferred material for RPD framework due to its excellent mechanical properties and biocompatibility.Rate this question:
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- 10.
213. The external finish line on a maxillary class I 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 notchExplanation
The external finish line on a maxillary class I RPD originates from the lingual of the guide plane of the terminal abutment and ends at the hamular notch. The hamular notch is a landmark located on the posterior border of the hard palate, near the last molar. It is used as a reference point for the placement of the finish line in order to ensure proper fit and stability of the removable partial denture.Rate this question:
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- 11.
214. The gridwork minor connector on a maxillary class I removable partial denture:
- 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 tuberosityExplanation
The gridwork minor connector on a maxillary class I removable partial denture does not cover the tuberosity. The tuberosity is the rounded prominence on the posterior aspect of the maxilla, and covering it with a connector would impede its function and potentially cause discomfort for the patient. The gridwork minor connector is designed to connect the major connectors to the rest of the framework, providing stability and support for the partial denture.Rate this question:
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- 12.
215. The Removable Partial Denture design should be finalized prior to:
- A.
Any emergency treatment
- B.
Any fixed prosthodontics treatment and preparation of rest seats
- C.
Remove third molar
- D.
Remove crown bridge
Correct Answer
B. Any fixed prosthodontics treatment and preparation of rest seatsExplanation
The Removable Partial Denture design should be finalized prior to any fixed prosthodontics treatment and preparation of rest seats because the design of the partial denture needs to take into account the final shape and position of the remaining teeth and the edentulous areas. Any changes made to the teeth or rest seats after the design of the partial denture has been finalized may require modifications to the denture, which can be time-consuming and costly. Therefore, it is important to have the design finalized before any fixed prosthodontics treatment or preparation of rest seats.Rate this question:
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- 13.
216. Guide plates for anterior teeth:
- A.
Should be kept to the labial for esthetics
- B.
Should be kept to the cingular for esthetics
- C.
Should be kept to the proximal faces for esthetics
- D.
Should be kept to the lingual and be thinned on labial for esthetics
Correct Answer
D. Should be kept to the lingual and be thinned on labial for estheticsExplanation
The guide plates for anterior teeth should be kept to the lingual and be thinned on the labial for esthetics. This means that the plates, which are used to guide the movement of the teeth, should be placed on the inner side of the teeth and made thinner on the outer side for better esthetic appearance. This allows for better alignment and positioning of the anterior teeth while maintaining a natural and pleasing appearance.Rate this question:
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- 14.
217. Component of a clasp assembly is:
- 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 and one or two minor connector
- C.
One minor connector, one major connector, one rest, one retentive arm, one bracing or reciprocating element
- 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 and one or two minor connectorExplanation
The correct answer is "One or two rests, a retentive arm, a bracing or reciprocating element and one or two minor connectors." This answer includes all the necessary components of a clasp assembly, which are one or two rests, a retentive arm, a bracing or reciprocating element, and one or two minor connectors. The other options either have missing components or have incorrect quantities of the components required for a clasp assembly.Rate this question:
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- 15.
218. In a class III modification 1 RPD, the rests are usually placed:
- A.
On the canines
- B.
Away from the modification space
- C.
In the area of the opposing occlusal contact
- D.
Adjacent to the modification space
Correct Answer
D. Adjacent to the modification spaceExplanation
In a class III modification 1 RPD, the rests are usually placed adjacent to the modification space. This means that the rests are positioned next to the area that has been modified or altered in the removable partial denture (RPD). Placing the rests in this location helps to provide stability and support to the RPD, as they help distribute the forces evenly across the remaining teeth and the edentulous area. By placing the rests adjacent to the modification space, the RPD can function effectively and comfortably for the patient.Rate this question:
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- 16.
219. The presence of mandibular lingual tori would indicate the need for:
- A.
A metal base
- B.
Lingual plating
- C.
Tube teeth
- D.
Extra indirect retainers
Correct Answer
B. Lingual platingExplanation
The presence of mandibular lingual tori indicates that there is excess bone on the lingual surface of the mandible. Lingual plating would be necessary in this case to provide support and stability to a denture or other dental prosthesis. A metal base, tube teeth, and extra indirect retainers are not specifically related to addressing lingual tori.Rate this question:
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- 17.
220. Rigid metal retention is associated with:
- A.
A dual path of insertion
- B.
A class IV RPD
- C.
The need for excellent esthetics
- D.
All are correct
Correct Answer
D. All are correctExplanation
Rigid metal retention is associated with all of the options given. A dual path of insertion is necessary for a RPD with rigid metal retention as it allows for better stability and retention. A class IV RPD, which is a removable partial denture that replaces missing teeth in the anterior region, often requires rigid metal retention to ensure proper fit and function. Additionally, excellent esthetics are important when using rigid metal retention to ensure that the RPD blends in seamlessly with the natural teeth. Therefore, all of the options given are correct.Rate this question:
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- 18.
221. What is the correct relationship of the foot of an-I bar to the survey line (height of contour) on abutment for an extension RPD:
- A.
The foot should be entirely above the survey line
- B.
The foot should be entirely above and partially below the survey line
- C.
The foot should be totally below the survey line
- D.
The relationship of the foot of the I –bar and the survey line of no consequence
Correct Answer
C. The foot should be totally below the survey lineExplanation
The correct relationship of the foot of an I-bar to the survey line on an abutment for an extension RPD is that the foot should be totally below the survey line. This means that the bottom of the I-bar should be positioned entirely below the height of the contour on the abutment.Rate this question:
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- 19.
222. A general rule for rest placement on an abutment adjacent to an extension area is:
- A.
Place the rest on the occlusal surface on the opposite side of the tooth from the extension area
- B.
Place the rest on the occlusal surface adjacent to the extension area
- C.
Place the rest on both the mesial and distal occlusal surfaces
- D.
Do not place a rest on this tooth
Correct Answer
A. Place the rest on the occlusal surface on the opposite side of the tooth from the extension areaExplanation
The correct answer is to place the rest on the occlusal surface on the opposite side of the tooth from the extension area. This is because placing the rest on the occlusal surface adjacent to the extension area may interfere with the proper functioning of the restoration. Placing the rest on both the mesial and distal occlusal surfaces is not necessary and may lead to unnecessary tooth reduction. Finally, not placing a rest on this tooth may result in instability and inadequate support for the restoration.Rate this question:
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- 20.
223. Physiologic adjustment of the framework:
- A.
Is usually done at delivery of the RPD
- B.
Should be done at the framework try-in appointment
- C.
Is usually done at the records appointment
- D.
May be omitted in the presence of strong abutments and good residual ridges
Correct Answer
B. Should be done at the framework try-in appointmentExplanation
Physiologic adjustment of the framework should be done at the framework try-in appointment. This is because the framework try-in appointment allows the dentist to assess the fit and function of the removable partial denture (RPD) before it is finalized. Physiologic adjustment involves making minor adjustments to the framework to ensure that it fits properly and does not cause any discomfort or harm to the patient's oral tissues. By doing this adjustment at the framework try-in appointment, the dentist can make any necessary modifications before the RPD is delivered to the patient.Rate this question:
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- 21.
224. Physiologic adjustment of the framework is related to:
- A.
The axis of rotation
- B.
The areas of edentulous space
- C.
The number of abutments
- D.
External finish line
Correct Answer
A. The axis of rotationExplanation
Physiologic adjustment of the framework refers to the adaptation of the framework to the natural movements and forces exerted by the surrounding structures in the mouth. The axis of rotation is an important factor in this adjustment because it determines the direction and extent of movement that the framework can accommodate. By aligning the framework with the axis of rotation, the prosthesis can move more freely and comfortably, allowing for better function and stability. The other options, such as the areas of edentulous space, the number of abutments, and the external finish line, are not directly related to the physiologic adjustment of the framework.Rate this question:
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- 22.
225. Physiologic adjustment of the framework is related to:
- A.
Adjustment of the framework to the teeth
- B.
Internal finish line
- C.
The classification of kennedy
- D.
The residual ridge and teeth
Correct Answer
A. Adjustment of the framework to the teethExplanation
Physiologic adjustment of the framework refers to the process of making necessary modifications to the framework in order to ensure proper fit and alignment with the teeth. This adjustment is important to ensure that the prosthesis is comfortable and functions correctly within the oral cavity. It involves making modifications to the framework to accommodate the shape, size, and position of the teeth.Rate this question:
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- 23.
226. Physiologic adjustment of the framework is related to:
- A.
Functional movement of the framework
- B.
The major connector and natural teeth
- C.
The minor connector and natural teeth
- D.
The rest and indirect retainer
Correct Answer
A. Functional movement of the frameworkExplanation
Physiologic adjustment of the framework refers to the ability of the framework to adapt and accommodate the functional movements of the oral structures. This includes movements such as chewing, speaking, and swallowing. The framework needs to be able to withstand these movements without causing discomfort or damage to the surrounding natural teeth. Therefore, the correct answer is functional movement of the framework.Rate this question:
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- 24.
227. The internal and external finish line is:
- A.
Normally superimposed over each other
- B.
Normally off set from each other to avoid weakness in the framework
- C.
Normally designed and placed independently
- D.
None of the above statements are true
Correct Answer
B. Normally off set from each other to avoid weakness in the frameworkExplanation
The internal and external finish line is normally offset from each other to avoid weakness in the framework. This means that the finishing lines on the inside and outside of a structure are not aligned directly on top of each other. This offset helps to distribute the load and stress evenly across the framework, preventing any weak points from forming. By offsetting the finish lines, the structure is made stronger and more resistant to potential weaknesses or failures.Rate this question:
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- 25.
228. What is component of a clasp assembly is:
- A.
One or more minor connectors
- B.
One or more major connectors
- C.
One or more denture bases
- D.
One or more proximal plates
Correct Answer
A. One or more minor connectorsExplanation
A clasp assembly consists of various components that are used to hold a removable partial denture in place. One of these components is the minor connector. The minor connector connects the major connector to the denture base, providing stability and support to the partial denture. It is responsible for transmitting the forces generated during chewing to the underlying teeth and soft tissues. Therefore, the correct answer is "One or more minor connectors."Rate this question:
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- 26.
229. An ideal clasp assembly should possess the following quality:
- A.
Support and rotation
- B.
Support
- C.
Support and protrusion
- D.
Support and deduction
Correct Answer
B. SupportExplanation
An ideal clasp assembly should possess the quality of support. This means that it should provide stability and hold the components securely in place. Support is essential to prevent any movement or displacement of the clasp assembly. It ensures that the clasp functions effectively and does not cause any discomfort or damage to the wearer.Rate this question:
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- 27.
230. An ideal clasp assembly should possess the following quality:
- A.
Retention with denture base
- B.
Retention with major connector
- C.
Retention with minor connector
- D.
Retention
Correct Answer
D. RetentionExplanation
An ideal clasp assembly should possess the quality of retention, which means it should securely hold the denture base, major connector, and minor connector in place. Retention is crucial for the stability and functionality of the clasp assembly, ensuring that the denture remains firmly attached to the supporting teeth or tissues. Without proper retention, the clasp assembly may become loose or dislodged, leading to discomfort, difficulty in eating or speaking, and potential damage to the denture or supporting structures. Therefore, retention is an essential quality for an ideal clasp assembly.Rate this question:
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- 28.
231. An ideal clasp assembly should possess the following quality:
- A.
Elasticity
- B.
Reciprocation
- C.
Kind of metal
- D.
Weight of metal
Correct Answer
B. ReciprocationExplanation
An ideal clasp assembly should possess reciprocation as a quality. Reciprocation refers to the ability of the clasp to move in a reciprocating manner, allowing for flexibility and adaptation to changes in the position of the teeth or denture. This quality ensures that the clasp can adjust and provide a secure fit, preventing the denture from becoming loose or dislodged. Elasticity, kind of metal, and weight of metal are not directly related to the desired quality of reciprocation in a clasp assembly.Rate this question:
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- 29.
232. An ideal clasp assembly should possess the following quality:
- A.
45 degree encirclement
- B.
90 degree encirclement
- C.
160 degree encirclement
- D.
180 degree encirclement
Correct Answer
D. 180 degree encirclementExplanation
An ideal clasp assembly should possess 180 degree encirclement because it ensures maximum stability and security. This means that the clasp completely wraps around the object it is securing, providing a strong and secure hold. With 180 degree encirclement, the clasp is less likely to slip or become loose, making it ideal for holding objects in place.Rate this question:
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- 30.
233. The best clasp assembly for a terminal abutment on a mandibular class I RPD is:
- A.
Mesial rest and I- bar clasp
- B.
Mesial rest and back action clasp
- C.
Distal and mesial rests
- D.
Distal and mesial rests half and half clasp
Correct Answer
B. Mesial rest and back action claspExplanation
The best clasp assembly for a terminal abutment on a mandibular class I RPD is a mesial rest and back action clasp. This combination provides effective support and stability for the prosthesis. The mesial rest helps distribute the forces evenly on the abutment tooth, while the back action clasp provides good retention and prevents rotation of the prosthesis. This combination is ideal for a terminal abutment in a mandibular class I RPD.Rate this question:
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- 31.
234. The guide surface or guide plate preparation should be curved:
- A.
Mesio-distally
- B.
Bucco-lingually
- C.
Occlusio-gingivally
- D.
Mesial and distal parallelism
Correct Answer
B. Bucco-linguallyExplanation
The guide surface or guide plate preparation should be curved bucco-lingually. This means that the curved surface should follow the contour of the buccal and lingual surfaces of the teeth. This is important to ensure proper fit and stability of the guide surface or guide plate. Curving the surface in this direction allows for better adaptation to the natural shape of the teeth and helps to prevent any interference or discomfort for the patient.Rate this question:
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- 32.
235. Important factors in determining the path of insertion/dislodgement is:
- A.
Potential guide surfaces
- B.
Depend on survey line
- C.
Depend on patient
- D.
Quality of framework
Correct Answer
A. Potential guide surfacesExplanation
The important factors in determining the path of insertion/dislodgement are potential guide surfaces. Potential guide surfaces refer to the areas on the dental prosthesis that can guide the prosthesis into place during insertion and prevent dislodgement during function. These surfaces are usually prepared to have a slight taper or convergence to aid in the proper seating and stability of the prosthesis. The other options, such as depend on survey line, depend on patient, and quality of framework, are not directly related to determining the path of insertion/dislodgement.Rate this question:
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- 33.
236. Important factor in determining the path of insertion/dislodgement is:
- A.
Undercuts for direct retainer
- B.
Depend on infrabulge and suprabulge
- C.
Depend on edentulous areas
- D.
None of above
Correct Answer
A. Undercuts for direct retainerExplanation
The important factor in determining the path of insertion/dislodgement is the presence of undercuts for the direct retainer. Undercuts provide mechanical retention and stability for the prosthesis, allowing it to securely fit onto the abutment teeth or implants. Without undercuts, the prosthesis may not have sufficient retention and may be prone to dislodgement.Rate this question:
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- 34.
237. Important factor in determining the path of insertion/dislodgement is:
- A.
Hard and soft tissue interferences
- B.
Depend on of abutments
- C.
Depend on force of mastication
- D.
Depend on attitude the patient
Correct Answer
A. Hard and soft tissue interferencesExplanation
The important factor in determining the path of insertion/dislodgement is hard and soft tissue interferences. These interferences can prevent the proper seating and stability of a prosthesis. They can create obstacles and prevent the prosthesis from fully engaging with the abutments. Therefore, the presence of hard and soft tissue interferences must be carefully evaluated and managed to ensure a successful path of insertion/dislodgement for the prosthesis.Rate this question:
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- 35.
238. Important factor in determining the path of insertion/dislodgement is:
- A.
Esthetic considerations
- B.
Depend on impression
- C.
Depend on design tray
- D.
Depend on secondary impression
Correct Answer
A. Esthetic considerationsExplanation
The important factor in determining the path of insertion/dislodgement is esthetic considerations. This means that when designing and placing a dental prosthesis, the path of insertion and removal should be carefully planned to ensure that it does not negatively impact the esthetics of the patient's smile. This includes considering factors such as the visibility of clasps or attachments, the alignment of the prosthesis with the natural teeth, and the overall appearance of the restoration.Rate this question:
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- 36.
239. The total retention for a RPD is obtained from:
- A.
Denture style retention(adhesion ,cohesion ,interfacial surface tension)
- B.
Major connector and minor connectors
- C.
Natural teeth and major connector
- D.
Pontic with major connector
Correct Answer
A. Denture style retention(adhesion ,cohesion ,interfacial surface tension)Explanation
The total retention for a RPD is obtained from denture style retention, which includes adhesion, cohesion, and interfacial surface tension. These factors contribute to the ability of the denture to stay in place and resist displacement during normal oral functions. Major and minor connectors, natural teeth, and pontics with major connectors do not directly contribute to the retention of the RPD.Rate this question:
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- 37.
240. The total retention for a RPD is obtained from:
- A.
Fictional retention from guide surface/guide plate contacts
- B.
Artificial teeth with major connector
- C.
Artificial teeth with natural teeth
- D.
Occlusion of artificial teeth
Correct Answer
A. Fictional retention from guide surface/guide plate contactsExplanation
The total retention for a RPD is obtained from the fictional retention from guide surface/guide plate contacts. This means that the retention of the removable partial denture is achieved through the contact between the guide surface and the guide plate, which creates a frictional force that holds the denture in place. The other options listed, such as artificial teeth with major connector, artificial teeth with natural teeth, and occlusion of artificial teeth, may contribute to the stability and functionality of the denture, but they do not directly affect the retention.Rate this question:
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- 38.
241. The total retention for a RPD is obtained from:
- A.
Mechanical retention from clasps (direct retainer)
- B.
Mechanical retention from major connector
- C.
Mechanical retention from minor connectors
- D.
Mechanical retention from grid work
Correct Answer
A. Mechanical retention from clasps (direct retainer)Explanation
The total retention for a removable partial denture (RPD) is obtained from the mechanical retention provided by the clasps, which are the direct retainers. The other options listed, such as the major connector, minor connectors, and grid work, do not directly contribute to the retention of the RPD.Rate this question:
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- 39.
242. A distal extension partial denture receives its support :
- A.
From terminal abutments
- B.
Equally from abutments and the residual ridges
- C.
Mostly from residual ridge
- D.
Exclusively from residual ridge
Correct Answer
C. Mostly from residual ridgeExplanation
A distal extension partial denture is a type of denture that is supported by both the remaining teeth (abutments) and the underlying bone ridge (residual ridge). However, the majority of the support for the denture comes from the residual ridge. This is because the abutments are located at the front of the mouth, while the distal extension area is at the back. Therefore, the residual ridge bears most of the load and provides stability for the denture.Rate this question:
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- 40.
243. Advantages of resin bases is :
- A.
Dimensional stability-warp
- B.
Lower strength / wear resistance than metal
- C.
Porous – hygiene
- D.
Esthetically superior to metal bases
Correct Answer
D. Esthetically superior to metal basesExplanation
Resin bases have the advantage of being aesthetically superior to metal bases. This means that they are more visually pleasing and can provide a more natural appearance. Resin bases can be color-matched to the patient's natural teeth, resulting in a more seamless and attractive smile. Additionally, resin bases are typically more comfortable for the patient as they are lighter and less bulky compared to metal bases.Rate this question:
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- 41.
244. Metal bases use :
- A.
Big edentulous space
- B.
Small edentulous space (no room for grid work)
- C.
For anterior edentulous space
- D.
For posterior edentulous space
Correct Answer
B. Small edentulous space (no room for grid work)Explanation
Metal bases are used in cases where there is a small edentulous space and there is no room for grid work. Grid work is a type of partial denture framework that is used to support the artificial teeth. In cases where there is not enough space for grid work, a metal base can be used instead. This allows for a more stable and secure fit of the denture in the mouth.Rate this question:
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- 42.
245. Function of denture bases :
- A.
Support and retain denture teeth
- B.
Stress distribution surface area
- C.
Improve esthetics
- D.
All are corrected
Correct Answer
D. All are correctedExplanation
The function of denture bases is to support and retain denture teeth, provide stress distribution across a larger surface area, and improve esthetics. All of these functions are correct. Denture bases play a crucial role in ensuring the stability and functionality of dentures, as well as enhancing the overall appearance of the patient's smile.Rate this question:
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- 43.
246. Acrylic resin bases is :
- A.
Most common type
- B.
Esthetics
- C.
Ease of repair
- D.
All are corrected
Correct Answer
D. All are correctedExplanation
Acrylic resin bases are commonly used in dentistry due to their esthetic appeal and ease of repair. They provide a natural appearance and can be easily fixed if damaged. Therefore, all of the given options are correct explanations for why acrylic resin bases are commonly used.Rate this question:
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- 44.
247.The support for a RPD is usually :
- A.
Tooth support
- B.
Mucosa support
- C.
Occlusal rest support
- D.
Tooth and mucosa support
Correct Answer
D. Tooth and mucosa supportExplanation
The support for a RPD (Removable Partial Denture) is usually provided by both the teeth and the surrounding mucosa. The teeth provide stability and retention for the denture, while the mucosa provides additional support and helps distribute the forces evenly. Both factors are important in ensuring the RPD fits properly and functions effectively.Rate this question:
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- 45.
248. The mandibular distal extension RPD extends up to :
- A.
Full length of retromolar pad
- B.
Anterior one third length of retro –molar pad
- C.
Anterior 2/3 of retro-molar pad
- D.
Just behind abutment
Correct Answer
C. Anterior 2/3 of retro-molar padExplanation
The mandibular distal extension RPD extends up to the anterior 2/3 of the retro-molar pad. This means that the removable partial denture (RPD) extends to the area just behind the abutment teeth, covering approximately two-thirds of the retro-molar pad. This is important for providing stability and support to the RPD, as well as maintaining proper function and aesthetics for the patient.Rate this question:
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- 46.
249. Distal extension RPD is :
- A.
Both tissue and tooth borne
- B.
Tissue borne
- C.
Class III condition
- D.
Class IV condition
Correct Answer
A. Both tissue and tooth borneExplanation
A distal extension removable partial denture (RPD) is a type of dental prosthesis that is supported by both the underlying tissues and the remaining natural teeth. This means that the RPD relies on both the gums and bone structure as well as the adjacent teeth for stability and support. It is used when there are missing teeth in the posterior region of the mouth and there are healthy teeth present on either side of the edentulous space.Rate this question:
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- 47.
250. If a third molar is absent and not to be replaced :
- A.
It is not consideration in the classification of partial dentures
- B.
It may or may not be considered
- C.
It is considered important for classification
- D.
None applies
Correct Answer
A. It is not consideration in the classification of partial denturesExplanation
The absence of a third molar does not affect the classification of partial dentures. This means that whether a patient has a third molar or not, it does not play a role in determining the type or classification of the partial denture that will be used.Rate this question:
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- 48.
251. RPD is indicated in all EXCEPT :
- A.
Long edentulous span
- B.
Multiple edentulous spaces
- C.
Excessive loss of alveolar bone
- D.
Distal abutment loss
Correct Answer
B. Multiple edentulous spacesExplanation
RPD stands for Removable Partial Denture, which is a prosthesis used to replace missing teeth in patients with some remaining natural teeth. RPD is indicated in cases of long edentulous spans, excessive loss of alveolar bone, and distal abutment loss. However, it is not indicated in cases of multiple edentulous spaces. This means that when a patient has several missing teeth in different areas of the mouth, RPD may not be the recommended treatment option.Rate this question:
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- 49.
252. Most important property of a RPD :
- A.
Retention
- B.
Stability
- C.
Occlusion
- D.
Prevention of tooth migration
Correct Answer
A. RetentionExplanation
The most important property of a removable partial denture (RPD) is retention. Retention refers to the ability of the RPD to stay in place and resist displacement during normal oral function. Without proper retention, the RPD may become loose, causing discomfort and difficulty in chewing and speaking. Retention is crucial for the success and functionality of the RPD, as it allows the patient to comfortably wear and use the prosthesis. Stability, occlusion, and prevention of tooth migration are also important properties of an RPD, but retention is considered the most vital.Rate this question:
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- 50.
253. The most important cause of failure of patients wear RPD is due to:
- A.
Indifferent patient education
- B.
Faulty laboratory procedures
- C.
Poor framework design
- D.
Improper preliminary rehabilitative restorative procedures
Correct Answer
D. Improper preliminary rehabilitative restorative proceduresExplanation
Improper preliminary rehabilitative restorative procedures can lead to failure of patients wearing RPDs. These procedures include the initial steps taken before the RPD is fabricated, such as the assessment of the patient's oral health, the planning and execution of any necessary dental treatments, and the preparation of the mouth for the RPD. If these procedures are not performed correctly, it can result in an ill-fitting or uncomfortable RPD, causing the patient to experience difficulties and ultimately leading to failure.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
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Oct 04, 2020Quiz Created by
Deap Monypov
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