MDS PREP
Fovea palatine are situated in
1. Hard palate
2. Soft palate
3. At the junction of hard and soft palate
4. Their position is not fixed
Prosthodontics
Answer: 2
Fovea palatine are situated in the soft palate.
All of the following are types of face bows, except
1 earpiece face bow
2 twirl bow
3. shaft face bow
4. facia face bow
Prosthodontics
Answer: 3
Types of Face Bows
1. Earpiece Face Bow
Description: This type of face bow has earpieces that
rest against the patient's ears. It is designed to record the relationship
of the maxilla to the hinge axis of the mandible.
Use: It is commonly used in clinical practice for
obtaining accurate records of the maxillary arch in relation to the TMJ. The
earpieces help in aligning the face bow with the patient's anatomical
landmarks.
2. Twirl Bow (or Twirl Face Bow)
Description: The twirl bow features a unique design
that allows for easy adjustment and positioning. It typically has a rotating
mechanism that helps in aligning the bow with the patient's facial midline.
Use: This type is particularly useful for obtaining a
more precise relationship of the maxilla to the TMJ, especially in cases
where the anatomy may be challenging to assess.
3. Bite Fork Face Bow
Description: This face bow incorporates a bite fork
that is used to capture the occlusal relationship of the maxillary arch. The
bite fork is attached to the face bow and is used to record the patient's
bite.
Use: It is often used in conjunction with other face
bows to ensure that the occlusal plane is accurately recorded in relation to
the TMJ.
4. Facial Bow
Description: This is a more general term that can refer
to any face bow used to record facial relationships. It may include various
designs and configurations.
Use: Facial bows are used in different prosthodontic
applications, including complete dentures, partial dentures, and fixed
prosthodontics.
5. Shaft Face Bow
Description: This type of face bow is less common and
may refer to a design that includes a shaft for stability and alignment.
Use: It is used in specific clinical situations where a
more rigid structure is needed to maintain the relationship of the maxilla
to the TMJ.
6. Kavo Face Bow
Description: This is a specific brand of face bow that
is designed for ease of use and accuracy. It often features adjustable
components for better alignment.
Use: Kavo face bows are used in various prosthodontic
procedures to ensure accurate records of the maxillary arch.
7. Hanau Face Bow
Description: The Hanau face bow is a well-known design
that allows for precise recording of the maxillary arch's relationship to
the TMJ. It typically includes a bite fork and adjustable arms.
Use: It is widely used in dental laboratories and
clinics for creating accurate dental prostheses.
The distal palatal termination of the complete denture is dictated by the
1. Tuberosity
2. Vibrating line
3. Fovea palatine
4. Maxillary tori
Prosthodontics
Answer: 2
The distal palatal termination of the complete denture is dictated by the vibrating line.
Selective pressure impression technique indicated in
1. Firm healthy mucosal covering over the ridge
2. Flabby ridges
3. Knife edge with movable mucosa
4. When sharp bony spicules are present in the ridge
Prosthodontics
Answer: 1
Selective pressure impression technique is indicated in firm healthy mucosal covering over the ridge.
Xerostomia is seen in all of the patients except (or) Reduction of salivary flow is not seen in
1. Parkinsonism
2. Phenothiazine therapy
3. Patients receiving radiation therapy
4. Early diabetic patient
Prosthodontics
Answer: 1
Xerostomia is seen in all of the patients except Parkinsonism.
When acrylic resin is packed in the sandy stage, it may result in
1) Open bite
2) Porosity
3) Increased strength
4) All of the above
Prosthodontics
Answer: 2
Packing acrylic resin in the sandy stage, which refers to a stage where the material is not fully polymerized and has a grainy texture, can lead to porosity in the final product. This occurs because the incomplete packing can trap air bubbles, resulting in a porous structure that compromises the strength and integrity of the restoration.
The function of posterior palatal seal (PPS) is
1. To aid in balanced occlusion
2. To aid in insertion and removal of complete denture
3. To ensure a complete seal thus helping in retention of a denture
4. Retention of mandibular denture by sealing its posterior margin
The function of the posterior palatal seal (PPS) is to ensure a complete seal thus helping in retention of a denture.
Guiding planes on abutment teeth provide
1) Predictable clasp retention
2) Increased resistance towards horizontal movement
3) Transmit forces along long axis of tooth
4) Guides the key into the key way
Prosthodontics
Answer: 1
The main function of guiding planes is to provide a stable and predictable path for the RPD to follow during insertion and removal. This helps in achieving proper clasp retention, which is essential for the stability of the denture. While they also contribute to resistance towards horizontal movement and guiding the key into the key way, their primary purpose is to ensure clasp retention.