MDS PREP
Before construction of the complete denture, patient"s natural dentition is evaluated because it helps in
1. Establishing vertical dimension
2. Arranging the teeth in balanced occlusion
3. Selection of form, shape, and size of the artificial teeth
4. All of the above
Prosthodontics
Answer: 3
Before construction of the complete denture, the patient's natural dentition is evaluated because it helps in all of the above: establishing vertical dimension, arranging the teeth in balanced occlusion, selection of form, shape, and size of the artificial teeth.
Excessive vertical dimension may affect
1. Encroaching the freeway space
2. Proper centric relation
3. Proper retention
4. All of the above
Prosthodontics
Answer: 4
Excessive vertical dimension may affect all of the above: encroaching the freeway space, proper centric relation, proper retention.
Relining of complete dentures is recommended for the correction of
I major speech problems
2 poor esthetics
3. unsatisfactory jaw relationship
4 none of the above
Prosthodontics
Answer: 4
Explanation: Relining is primarily indicated when the fit of
the denture has changed due to resorption of the alveolar ridge or other
factors, leading to an unsatisfactory jaw relationship. However, it is not
typically used to address speech problems or esthetic concerns directly.
Therefore, the correct answer is that relining is not recommended for the
options listed.
Selective grinding for equilibrating complete dentures is best accomplished after processing when the dentures are
1) Rearticulated using original jaw relation record
2) Rearticulated with a new series of jaw relation
3) Equilibrated in the patient"s mouth
4) None of the above
Prosthodontics
Answer: 2
Selective grinding is a technique used to adjust the occlusion of complete dentures. It is best performed after the dentures have been processed and rearticulated with a new series of jaw relations to ensure that the occlusion is accurate and reflects the patient's current jaw relationship. This allows for more precise adjustments to be made, as the original records may not accurately represent the current occlusal relationship after processing.
The range of motion, as measured in millimeters, is least for the
1. pure hinge like opening and closing movement
2. protrusive movement
3. left lateral movement
4. Bennet movement
Prosthodontics
Answer: 4
Explanation:
Pure hinge-like opening and closing movement: The range of pure rotation in
the temporomandibular joint (TMJ) was determined to be up to 15–20 mm in the
1960s. However, recent research suggests that pure rotational movement may not
occur.
Protrusive movement: The normal range of motion for protrusive movement is
8–12 mm.
Left lateral movement: The normal range of motion for left lateral movement
is 8–12 mm. The normal range of motion for mouth opening is 35–60 mm.
The average immediate Bennett shift was found to be 1.05 mm on the left
side and 1.12 mm on the right side when firm guidance was used.
An overextended mandibular denture will be dislodged as a result of function of
1. Masseter
2. Temporalis
3. Buccinator
4. Lateral pterygoid
Prosthodontics
Answer: 1
An overextended mandibular denture will be dislodged as a result of the function of masseter.
A pantograph is a record of the patient’s
1. jaw movements
2. speech pattern
3. muscular con
4. maxillary movements
Prosthodontics
Answer: 1
A pantograph is a record of the patient’s jaw movements.
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.