MDS PREP
A properly designed rest on lingual surface of a canine is preferred to a rest on incisal surface because
1) Less leverage is exerted against the tooth by lingual rest
2) Enamel is thicker on lingual surface
3) Visibility and access is better on lingual surface
4) None of the above
Prosthodontics
Answer: 1
a properly designed rest on the lingual surface of a canine is preferred because it exerts less leverage against the tooth compared to a rest on the incisal surface (option 1). This is important for maintaining the integrity of the tooth and preventing potential damage or displacement.
Which dental surveyor is known for its simplicity and durability?
1) Jelenko surveyor
2) Ney surveyor
3) Williams surveyor
4) Highriser RPD surveyor
Prosthodontics
Answer: 2
The Ney surveyor is widely recognized for its simplicity and durability, making it a popular choice among dental professionals.
The best criterion for teeth selection is
1. Past photographs
2. Pre extraction records
3. Study models
4. None of the above
Prosthodontics
Answer: 2
Pre-extraction records provide the most accurate information regarding the size, shape, and position of the teeth before extraction, making them the best criterion for selecting replacement teeth in prosthodontics.
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.
All of the following landmarks are included while making a postdam for maxillary arch except
1. Pterygomaxillary notch
2. Hamular process
3. Fovea palatina
4. Vibrating line
Prosthodontics
Answer: 2
All of the following landmarks are included while making a postdam for maxillary arch except hamular process.
Closest speaking space in normal jaw relations is approximately
1. 0 to 1.5 mm
2. 1.5 to 3 mm
3. 3 to 6 mm
4. 6 to 9 mm
Prosthodontics
Answer: 2
Closest speaking space in normal jaw relations is approximately 1.5 to 3 mm.
The following property of saliva affects denture retention
1. Quality and quantity of serous and mucus saliva
2. Quantity of mixed saliva
3. Quantity of only serous saliva
4. Both A and C
The property of saliva that affects denture retention is both quality and quantity of serous and mucus saliva.
Which of the following is a step in the surveying procedure?
1) Tooth extraction
2) Cast tilting
3) Tooth whitening
4) Filling cavities
Prosthodontics
Answer: 2
Cast tilting is one of the steps in the surveying procedure, allowing for the assessment of undercuts and the path of insertion.