Fixed Partial Denture Short Question And Answers
Introduction to FPD
Multiple Choice Questions
Table of Contents
Question 1. The width of the attached gingiva of abutment teeth is evaluated with the help of:
- Periapical radiograph.
- Bitewing radiograph.
- Intraoral examination.
- Diagnostic casts.
- Extraoral examination.
Answer. 3. Intraoral examination.
Read And Learn More: Fixed Partial Denture Short Essay Question And Answers
Question 2. Which of the following are assessed during the intraoral examination for fixed dental prostheses?
- Attached gingiva.
- Gingival architecture and stippling.
- Amount of plaque retention.
- Occlusal prematurities.
- All of the above.
Note – apart from the above the other factors assessed during intraoral examination are non-working interferences, tooth mobility, and location, depth of pocket.
Answer. 5. All of the above.
Question 3. Choose the items that can be assessed using a diagnostic cast.
- The inclination of the tooth.
- Length of the abutment tooth.
- Length of the edentulous space.
- All of the above.
Answer. 4. All of the above.
Question 4. Which one of the following can be assessed using a bitewing radiograph?
- Amount of plaque retention.
- Location and extent of proximal caries.
- Bone level.
- 1 and 2.
- 2 and3.
Answer. 5. 2 and 3.
Question 5. Which one of the following can be assessed using a periapical radiograph?
- Amount of plaque retention.
- Chronic apical periodontitis.
- Tooth mobility.
- Length and configuration of roots.
- B and D.
Answer. 5. 2 and 4.
Question 6. Which one of the following investigations is not necessary for routine assessment of a patient for fixed prosthodontic treatment?
- Full periodontal charting.
- TMJ evaluation.
- Extraoral examination.
- Diagnostic casts.
- Radiographs.
Answer. 1. Full periodontal charting.
Question 7. Habits like clenching may result in fatigue, muscle pain, and hypertrophy of the:
- Buccinator.
- Masseter.
- Sternocleidomastoid.
- Lateral pterygoid.
- Trapezius.
Answer. 2. Masseter.
Extended Matching Questions
Question 1. Theme: Diagnosis.
A. Attached gingiva.
B. Diagnostic wax up.
C. Proximal caries.
D. Dietary habit.
E. Regurgitation.
F. Root configuration.
G. Temporomandibular joint.
Using a letter from A to G, choose the most appropriate response from the list above that best matches each of the following descriptions numbered 1 to 5 below. You may use each response from A to G, once only or not at all.
- Checked using the periapical radiograph.
- Assessed using the intraoral examination.
- Revealed during patient history.
- Evaluated during the extraoral examination.
- Viewed with the help of horizontal bitewing radiograph.
Question 2. Theme: Components of a fixed prosthesis.
A. Abutment.
B. Connector.
C. Pontic.
D. Retainer.
E. Non-rigid connector.
F. Edentulous ridge.
G. Crown.
Using a letter from A to G, choose the most appropriate response from the list above that best matches each of the following descriptions numbered 1 to 5 below. You may use each response from A to G, once only or not at all.
- A component of a bridge that permits limited movement.
- An artificial tooth on a bridge that replaces a missing natural tooth and restores its form and function.
- A component of a bridge that is cemented to the abutment(s).
- The term is used to describe the tooth or teeth to which a bridge is cemented.
- A component of a bridge that joins the retainer to the pontic.
Short Answer Questions
Question 1. 1. List four possible signs and symptoms of a TMJ disorder.
- Clicking
- Crepitation
- Pain and limitation on opening, closing and moving laterally
- Pain of palpation of the joints and masticatory muscles as the patient opens and closes
- Deviation of mandible when open and close
- Headache.
2. Which are the six muscles that should be examined when a TMJ disorder is suspected?
- Masseter
- Temporalis
- Medial pterygoid
- Lateral pterygoid
- Trapezius
- Sternocleidomastoid.
Question 2. 1. List six indications for diagnostic casts in planning for any prosthesis in a dentate patient.
- To study occlusion
- Length and curvature of edentulous spaces
- Occlusogingival dimensions
- Orientation of abutment teeth
- Wear facets
- Positioning and super-eruption of opposing teeth
- Prepare diagnostic wax-up.
2. List four indications for taking radiographs in planning for any prosthesis in a dentate patient.
- Caries: Interproximal and under the existing restorations
- Periapical lesions
- Quality of root canal treatments
- Supporting bone level
- Crown/root ratio
- Length, configuration and direction of roots
- PDL width (traumatic occlusion)
- Retained root and any other pathology.
Fundamentals of occlusion
Multiple Choice Questions
Question 1. The position of the condyle in centric relation is:
- Anteriorly, superiorly braced position along the articular eminence of the glenoid fossa.
- Anteriorly, inferiorly braced position along the articular eminence of the glenoid fossa.
- Posteriorly, superiorly braced position along the articular eminence of the glenoid fossa.
- Posteriorly, inferiorly braced position along the articular eminence of the glenoid fossa.
- Posteriorly, medially braced position along the articular eminence of the glenoid fossa.
Answer. 1. Anteriorly, superiorly braced position along the articular eminence of the glenoid fossa.
Question 2. The mandible makes a purely rotational opening and closing movement around the:
- Vertical axis.
- Sagittal axis.
- Horizontal axis.
- Frontal axis.
- Orientation axis.
Answer. 3. Horizontal axis.
Question 3. A pure hinge movement of condyles within the range of 10 – 13 degrees produces a separation of …………………
- 20 – 25 mm.
- 10 – 15 mm.
- 20 – 25 cm.
- 10 – 15 cm.
Answer. 1. 20 – 25 mm.
Question 4. A shield-shaped pattern has all distinct movement components except the:
- Left lateral superior border
- Left lateral opening border
- Right lateral Inferior border
- Right lateral opening border.
Answer. 3. Right lateral Inferior border.
Question 5. When the mandible moves laterally the nonworking side condyle will arc….
- Forward and medially.
- Laterally and posteriorly.
- Forward and laterally.
- Medially and posteriorly.
- Laterally and anteriorly.
Answer. 1. Forward and medially.
Question 6. When the mandible moves laterally the working side condyle will arc:
- Forward and medially.
- Laterally and posteriorly.
- Forward and laterally.
- Medially and posteriorly.
- Laterally and anteriorly.
Answer. 2. Laterally and posteriorly.
Question 7. The dentist has control over which one of the following determinants of mandibular movement?
- Anterior determinants.
- Posterior determinants and temporomandibular joints.
- Anterior determinants and temporomandibular joints.
- Posterior determinants.
- Temporomandibular joints.
Answer. 1. Anterior determinants.
Question 8. The working occlusal interference is more likely to occur on:
- Mesial-facing cusp inclines of the maxilla.
- Lingual-facing cusp inclines of the maxilla.
- Buccal-facing cusp inclines of maxilla.
- Distal-facing cusp inclines of the mandible.
- Mesial-facing cusp inclines of the mandible.
Answer. 2. Lingual-facing cusp inclines of the maxilla.
Question 9. The centric occlusal interferences are more likely to occur on:
- Buccal-facing inclines of mandibular molars.
- Mesial-facing inclines of maxillary molars.
- Mesial-facing inclines of mandibular molars.
- Distal-facing inclines of maxillary molars.
- Lingual-facing inclines of mandibular molars.
Answer. 2. Mesial-facing inclines of maxillary molars.
Question 10. Protrusive occlusal interferences are more likely to occur on:
- Buccal-facing inclines of mandibular molars.
- Mesial-facing inclines of maxillary molars.
- Distal-facing inclines of mandibular molars.
- Distal-facing inclines of maxillary molars.
- Lingual-facing inclines of mandibular molars.
Answer. 4. Distal-facing inclines of maxillary molars.
Question 11. The nonworking occlusal interference is more likely to occur on:
- Mesial-facing cusp inclines of the maxilla.
- Lingual-facing cusp inclines of the maxilla.
- Buccal -facing cusp inclines of maxilla.
- Distal-facing cusp inclines of the mandible.
- Mesial-facing cusp inclines of the mandible.
Answer. 3. Buccal – facing cusp inclines of the maxilla.
Question 12. Mutually protected occlusion is otherwise called as:
- Group function.
- Incisor occlusion.
- Molar occlusion.
- Organic occlusion.
Answer. 4. Organic occlusion.
Question 13. The concept of occlusion which is used in complete denture construction is:
- Unilateral balanced occlusion.
- Mutually protected occlusion.
- Canine-protected occlusion.
- Bilateral balanced occlusion.
Answer. 4. Bilateral
Question 14. Mutually protected occlusion cannot be observed in patients with:
- Class 1 occlusion.
- Reverse occlusion.
- Class 1 malocclusion.
- Overjet occlusion.
Answer. 2. Reverse occlusion
Question 15. During protrusive movement, if the protrusive inclination is steep then the corresponding cuspal height is:
- Shallow.
- Flat.
- Steep.
- Undermined.
Answer. 3. Steep.
Question 16. During immediate lateral translation movement if the translation is minimal then the corresponding cuspal height is:
- Shallow.
- Flat.
- Steep.
- Undermined.
Answer. 3. Steep.
Question 17. If the vertical overlap is greater, then the posterior cuspal height is:
- Shorter.
- Flat.
- Longer.
- Undermined.
Answer. 3. Longer.
Short Answer Questions
Question 1. Name the determinants of mandibular movements.
- Posteriorly the right and left temporomandibular joints
- Anteriorly the teeth
- Overall the neuromuscular system.
Question 2. Describe the different types of occlusal interferences.
- Centric: Maxillary mesial-facing cusp inclines and mandibular distal-facing cusp inclines
- Working: Maxillary lingual-facing cusp inclines and mandibular buccal-facing cusp inclines
- Nonworking: Maxillary buccal-facing cusp inclines and mandibular lingual-facing cusp inclines
- Protrusive: Maxillary distal-facing cusp inclines and mandibular mesial-facing cusp inclines.
Question 3. Describe the Okeson criteria for normal occlusion.
- In closure, the condyles are in the most super anterior position against the discs on the posterior slopes of the eminences of the glenoid fossae. The posterior teeth are in solid and even contact, and the anterior teeth are in slightly lighter contact
- Occlusal forces are in the long axis of the teeth
- In lateral excursions of the mandible, working-side contacts (preferably on the canines) dis occlude or separate the nonworking teeth instantly
- In protrusive excursions, anterior tooth contacts will dis occlude the posterior teeth
- In an upright posture, posterior teeth contact more heavily than do anterior teeth.
Question 4. Discuss in detail the three recognized concepts of occlusion.
Bilateral Balanced Occlusion
- Based on the work of von Spee and Monson
- Dictates that a maximum number of teeth should contact in all excursive positions of the mandible
- Useful in complete denture construction, in which contact on the nonworking side is important to prevent tipping of the denture.
Unilateral Balanced Occlusion
- Based on the work of Schuyler
- Known as group function, distributes the occlusal load
- Eliminate all tooth contact on the nonworking side, prevents those teeth from being subjected to the destructive, obliquely directed forces found in non-working interferences
- Saves the centric holding cusps and maintains the occlusion.
Mutually-protected Occlusion
- Based on the work of D’Amico, Stuart, Stallard, Stuart, Lucia
- Known as canine-protected occlusion or ‘’organic” occlusion
- The anterior teeth bear the entire load and the posterior teeth are dis occluded in any excursive position of the mandible
- As a result of the anterior teeth protecting the posterior teeth in all mandibular excursions and the posterior teeth protecting the anterior teeth at the intercuspal position, this type of occlusion came to be known as a mutually-protected occlusion.
Articulation And Articulators
Multiple Choice Questions
Question 1. Choose the correct ones
- In an arcon articulator, the condylar elements are placed on the lower member of the articulator.
- In an arcon articulator, the condylar inclination becomes less steep when the teeth are separated or closed.
- The most accurate method of locating the hinge axis is by trial and error method by McCollum and Stuart in 1921.
- Arcon articulators are the most commonly used articulators for dentures.
- The thickness of the interocclusal records is—3.0–5.0 mm.
- The precise recording of the condylar paths is done by interocclusal recordings.
- 1, 2 and 5.
- 1, 3 and 5.
- 3, 4 and 6.
- 2, 4 and 6.
Answer. 2. 1, 3 and 5.
Extended Matching Questions
Question 1. Theme: Articulation
A. Simple hinge articulator.
B. Semi-adjustable articulator.
C. Fully adjustable articulator.
D. Face bow.
E. Fox plane.
F. Willis gauge.
G. Metal gauge.
Using a letter from A to G, choose the most appropriate articulator from the list above that best matches each of the following descriptions numbered 1 to 5 below. You may use each response from A to G, once only or not at all.
- The most suitable jaw simulator is used in making short-span bridges and complete dentures.
- A device used to assess lower face vertical dimension.
- A device used to assess the parallelism of occlusal wax rims.
- A device used to assess the thickness of crowns.
- A device used to transfer the relationship between the jaws and the posterior hinge axis to the articulators.
Short Answer Questions
Question 1. Name the type of mandibular movement in the tracings.
Left lateral excursion
Right lateral excursion
Protrusive excursion
Interocclusal Records
Multiple Choice Questions
Question 1. The interocclusal record used to adjust the horizontal condylar guidance of a semi-adjustable articulator is the:
- Centric relation.
- Lateral interocclusal.
- Protrusive.
- Maximum intercuspation.
- Retrusive.
Answer. 3. Protrusive.
Question 2. In what relation are study casts mounted for diagnosis and complex treatment, such as occlusal rehabilitation?
- Eccentric relation.
- Maximum intercuspation.
- Centric relation.
- Canine relation.
- Protrusive relation.
Answer. 3. Centric relation.
Question 3. In what relation are study casts mounted for simpler treatment, such as single crown restorations?
- Eccentric relation.
- Maximum intercuspation.
- Centric relation.
- Canine relation.
- Protrusive relation.
Answer. 2. Maximum intercuspation.
Question 4. The most consistent and repeatable method of obtaining centric relation is:
- Chin point guidance.
- Unguided method.
- Bilateral manipulation.
- Physiologic method.
Answer. 3. Bilateral manipulation.
Question 5. The position of the condyle during the initial tooth contact with the mandible in the optimum position is called:
- Eccentric relation contact position.
- Maximum contact position.
- Centric relation contact position.
- Protrusive contact position.
Answer. 3. Centric relation contact position.
Question 6. The bite registration material used for recording centric relations should be:
- Elastic and brittle.
- Rigid and flexible.
- Rigid and brittle.
- Elastic and flexible.
- Rigid and elastic.
Answer. 3. Rigid and brittle.
Question 7. Occlusal clearance in a prepared tooth is best assessed by:
- Visual examination.
- Metal gauge.
- Articulating paper.
- Wax bite.
- Bite registration paste.
Answer. 4. Wax bite.
Short Answer Questions
Question 1. Name the three techniques for locating centric relation position.
- Chin point guidance – most posterior and superior position
- Unguided method – physiologic – not repeatable
- Bilateral manipulation – consistent, repeatable by Dawson.
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